summaryrefslogtreecommitdiffstats
path: root/libjpegtwrp/asm
diff options
context:
space:
mode:
authorDees_Troy <dees_troy@teamw.in>2013-08-11 00:19:03 +0200
committerDees_Troy <dees_troy@teamw.in>2013-08-11 00:19:03 +0200
commit930bf01caf3cbcabf97444b3071bcaff28597635 (patch)
treeec602b8261c9a40ef37e4530c075940bcce0bf2d /libjpegtwrp/asm
parentRemove unneeded touch code changes (diff)
downloadandroid_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar.gz
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar.bz2
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar.lz
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar.xz
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.tar.zst
android_bootable_recovery-930bf01caf3cbcabf97444b3071bcaff28597635.zip
Diffstat (limited to '')
-rw-r--r--libjpegtwrp/asm/armv7/jdcolor-android-armv7.S1223
-rw-r--r--libjpegtwrp/asm/armv7/jdcolor-armv7.S632
-rw-r--r--libjpegtwrp/asm/armv7/jdidct-armv7.S762
3 files changed, 0 insertions, 2617 deletions
diff --git a/libjpegtwrp/asm/armv7/jdcolor-android-armv7.S b/libjpegtwrp/asm/armv7/jdcolor-android-armv7.S
deleted file mode 100644
index 95bd4bf78..000000000
--- a/libjpegtwrp/asm/armv7/jdcolor-android-armv7.S
+++ /dev/null
@@ -1,1223 +0,0 @@
-/*------------------------------------------------------------------------
-* jdcolor-android-armv7.S
-*
-* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions are
-* met:
-* * Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* * Redistributions in binary form must reproduce the above
-* copyright notice, this list of conditions and the following
-* disclaimer in the documentation and/or other materials provided
-* with the distribution.
-* * Neither the name of Code Aurora Forum, Inc. nor the names of its
-* contributors may be used to endorse or promote products derived
-* from this software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
-* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
-* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*--------------------------------------------------------------------------
-
-*--------------------------------------------------------------------------
-* FUNCTION LIST
-*--------------------------------------------------------------------------
-*
-* - yvup2rgb565_venum
-* - yyvup2rgb565_venum
-* - yvup2abgr8888_venum
-* - yyvup2abgr8888_venum
-*
-*--------------------------------------------------------------------------
-*/
-
- .section yvu_plain_to_rgb_android, "x" @ AREA
- .text @ |.text|, CODE, READONLY
- .align 2
- .code 32 @ CODE32
-
-/*-----------------------------------------------------------------------------
- * ARM Registers
- * ---------------------------------------------------------------------------- */
-p_y .req r0
-p_cr .req r1
-p_cb .req r2
-p_rgb .req r3
-p_bgr .req r3
-length .req r12
-
- .global yvup2rgb565_venum
- .global yyvup2rgb565_venum
- .global yvup2abgr8888_venum
- .global yyvup2abgr8888_venum
-
-@ coefficients in color conversion matrix multiplication
-.equ COEFF_Y, 256 @ contribution of Y
-.equ COEFF_V_RED, 359 @ contribution of V for red
-.equ COEFF_U_GREEN, -88 @ contribution of U for green
-.equ COEFF_V_GREEN, -183 @ contribution of V for green
-.equ COEFF_U_BLUE, 454 @ contribution of U for blue
-
-@ Clamping constants 0x0 and 0xFF
-.equ COEFF_0, 0
-.equ COEFF_255, 255
-
-@ Bias coefficients for red, green and blue
-.equ COEFF_BIAS_R, -45824 @ Red bias = -359*128 + 128
-.equ COEFF_BIAS_G, 34816 @ Green bias = (88+183)*128 + 128
-.equ COEFF_BIAS_B, -57984 @ Blue bias = -454*128 + 128
-
-
-/*--------------------------------------------------------------------------
-* FUNCTION : yvup2rgb565_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YVU planar to RGB565 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yvup2rgb565_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_rgb565,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_rgb565
-* pointer to the output RGB Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_rgb565 - the converted rgb pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yvup2rgb565_venum, %function
-yvup2rgb565_venum:
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -70688 | -70688 | -70688 | -70688
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yvup2rgb565:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12 : Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD1.U8 {D12}, [p_y]! @ Load 8 Y elements (uint8) to D12
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D18, D19: Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D20, D21: V0 V1 V2 V3 V4 V5 V6 V7
- * D22, D23: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q9, D12
- VMOVL.U8 Q10, D14
- VMOVL.U8 Q11, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D20, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D22, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D20, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D22, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D18, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D18, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D18, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D18 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D20 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D22, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Done with the first 4 elements, continue on the next 4 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D21, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D23, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D21, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D23, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D19, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D19, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D19, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D19 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D21 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D23, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D28, Q9 @ store Red to D28, narrow the value from int16 to int8
-
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D27, Q10 @ store Green to D27, narrow the value from int16 to int8
-
- VMAX.S16 Q11, Q11, Q4 @ if Q11 < 0, Q11 = 0
- VMIN.S16 Q11, Q11, Q5 @ if Q11 > 255, Q11 = 255
- VQMOVUN.S16 D26, Q11 @ store Blue to D26, narrow the value from int16 to int8.
-
- /*-------------------------------------------------------------------------
- * D27: 3 bits of Green + 5 bits of Blue
- * D28: 5 bits of Red + 3 bits of Green
- * ------------------------------------------------------------------------ */
- VSRI.8 D28, D27, #5 @ right shift G by 5 and insert to R
- VSHL.U8 D27, D27, #3 @ left shift G by 3
- VSRI.8 D27, D26, #3 @ right shift B by 3 and insert to G
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yvup2rgb565 @ jump to trailing processing if remaining length is less than 8
-
- VST2.U8 {D27, D28}, [p_rgb]! @ vector store Red, Green, Blue to destination
- @ Blue at LSB
-
- BHI loop_yvup2rgb565 @ loop if more than 8 pixels left
-
- BEQ end_yvup2rgb565 @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yvup2rgb565:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST2.U8 {D27[0], D28[0]}, [p_rgb]! @ at least 1 pixel left in the trailing part
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[1], D28[1]}, [p_rgb]! @ store one more pixel
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[2], D28[2]}, [p_rgb]! @ store one more pixel
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[3], D28[3]}, [p_rgb]! @ store one more pixel
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[4], D28[4]}, [p_rgb]! @ store one more pixel
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[5], D28[5]}, [p_rgb]! @ store one more pixel
- BEQ end_yvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D27[6], D28[6]}, [p_rgb]! @ store one more pixel
-
-end_yvup2rgb565:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
-
- @ end of yvup2rgb565
-
-
-/*--------------------------------------------------------------------------
-* FUNCTION : yyvup2rgb565_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YYVU planar to RGB565 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yyvup2rgb565_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_rgb565,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_rgb565
-* pointer to the output RGB Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_rgb565 - the converted rgb pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yyvup2rgb565_venum, %function
-yyvup2rgb565_venum:
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -70688 | -70688 | -70688 | -70688
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yyvup2rgb565:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12, D13: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14, Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD2.U8 {D12,D13}, [p_y]! @ Load 16 Luma elements (uint8) to D12, D13
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D24, D25: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14
- * D26, D27: Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D28, D29: V0 V1 V2 V3 V4 V5 V6 V7
- * D30, D31: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q12, D12
- VMOVL.U8 Q13, D13
- VMOVL.U8 Q14, D14
- VMOVL.U8 Q15, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D28, D6[0] @ Q6: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q7, D30, D6[1] @ Q7: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q7, D28, D6[2] @ q7: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q8, D30, D6[3] @ q8: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D24, D7[0] @ Q6: R0, R2, R4, R6 in 32-bit Q8 format
- VMLAL.S16 Q9, D26, D7[0] @ Q9: R1, R3, R5, R7 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D24, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D26, D7[0] @ Q10: G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D24, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D26, D7[0] @ Q11: B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R0 R2 R4 R6 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R1 R3 R5 R7 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6 : R0 R1 R2 R3 R4 R5 R6 R7
-
- VSHRN.S32 D18, Q7, #8 @ D18: G0 G2 G4 G6 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G1 G3 G5 G7 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9 : G0 G1 G2 G3 G4 G5 G6 G7
-
- VSHRN.S32 D20, Q8, #8 @ D20: B0 B2 B4 B6 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B1 B3 B5 B7 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B0 B1 B2 B3 B4 B5 B6 B7
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D23, Q6 @ store Red to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D21, Q10 @ store Blue to D21, narrow the value from int16 to int8
-
- /*-------------------------------------------------------------------------
- * D22: 3 bits of Green + 5 bits of Blue
- * D23: 5 bits of Red + 3 bits of Green
- * ------------------------------------------------------------------------ */
- VSRI.8 D23, D22, #5 @ right shift G by 5 and insert to R
- VSHL.U8 D22, D22, #3 @ left shift G by 3
- VSRI.8 D22, D21, #3 @ right shift B by 3 and insert to G
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2rgb565 @ jump to trailing processing if remaining length is less than 8
-
- VST2.U8 {D22,D23}, [p_rgb]! @ vector store Red, Green, Blue to destination
- @ Blue at LSB
-
- BEQ end_yyvup2rgb565 @ done if exactly 8 pixel processed in the loop
-
-
- /*-------------------------------------------------------------------------
- * Done with the first 8 elements, continue on the next 8 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D29, D6[0] @ Q6: 359*(V4,V5,V6,V7) Red
- VMULL.S16 Q7, D31, D6[1] @ Q7: -88*(U4,U5,U6,U7) Green
- VMLAL.S16 Q7, D29, D6[2] @ Q7: -88*(U4,U5,U6,U7) - 183*(V4,V5,V6,V7)
- VMULL.S16 Q8, D31, D6[3] @ Q8: 454*(U4,U5,U6,U7) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D25, D7[0] @ Q6: R8 R10 R12 R14 in 32-bit Q8 format
- VMLAL.S16 Q9, D27, D7[0] @ Q9: R9 R11 R13 R15 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D25, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D27, D7[0] @ Q10 : G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D25, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D27, D7[0] @ Q11 : B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R8 R10 R12 R14 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R9 R11 R13 R15 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6: R8 R9 R10 R11 R12 R13 R14 R15
-
- VSHRN.S32 D18, Q7, #8 @ D18: G8 G10 G12 G14 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G9 G11 G13 G15 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9: G8 G9 G10 G11 G12 G13 G14 G15
-
- VSHRN.S32 D20, Q8, #8 @ D20: B8 B10 B12 B14 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B9 B11 B13 B15 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B8 B9 B10 B11 B12 B13 B14 B15
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D23, Q6 @ store Red to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D21, Q10 @ store Blue to D21, narrow the value from int16 to int8
-
- /*-------------------------------------------------------------------------
- * D22: 3 bits of Green + 5 bits of Blue
- * D23: 5 bits of Red + 3 bits of Green
- * ------------------------------------------------------------------------ */
- VSRI.8 D23, D22, #5 @ right shift G by 5 and insert to R
- VSHL.U8 D22, D22, #3 @ left shift G by 3
- VSRI.8 D22, D21, #3 @ right shift B by 3 and insert to G
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2rgb565 @ jump to trailing processing if remaining length is less than 8
-
- VST2.U8 {D22,D23}, [p_rgb]! @ vector store Red, Green, Blue to destination
- @ Blue at LSB
-
- BHI loop_yyvup2rgb565 @ loop if more than 8 pixels left
-
- BEQ end_yyvup2rgb565 @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yyvup2rgb565:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST2.U8 {D22[0],D23[0]}, [p_rgb]! @ at least 1 pixel left in the trailing part
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[1],D23[1]}, [p_rgb]! @ store one more pixel
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[2],D23[2]}, [p_rgb]! @ store one more pixel
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[3],D23[3]}, [p_rgb]! @ store one more pixel
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[4],D23[4]}, [p_rgb]! @ store one more pixel
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[5],D23[5]}, [p_rgb]! @ store one more pixel
- BEQ end_yyvup2rgb565 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST2.U8 {D22[6],D23[6]}, [p_rgb]! @ store one more pixel
-
-end_yyvup2rgb565:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
-
- @ end of yyvup2rgb565
-
-constants:
- .hword (COEFF_V_RED), (COEFF_U_GREEN), (COEFF_V_GREEN), (COEFF_U_BLUE) @ 359 | -88 | -183 | 454
- .hword (COEFF_Y), (COEFF_0), (COEFF_255) , (COEFF_0) @ 256 | 0 | 255 | 0
- .word (COEFF_BIAS_R), (COEFF_BIAS_G), (COEFF_BIAS_B) @ -45824 | 34816 | -57984 | X
-
-/*--------------------------------------------------------------------------
-* FUNCTION : yvup2abgr8888_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YVU planar to ABGR8888 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yvup2abgr8888_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_abgr8888,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_abgr8888
-* pointer to the output ABGR Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_abgr8888 - the converted ABGR pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yvup2abgr8888_venum, %function
-yvup2abgr8888_venum:
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -70688 | -70688 | -70688 | -70688
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yvup2abgr:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12 : Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD1.U8 {D12}, [p_y]! @ Load 8 Luma elements (uint8) to D12
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D18, D19: Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D20, D21: V0 V1 V2 V3 V4 V5 V6 V7
- * D22, D23: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q9, D12
- VMOVL.U8 Q10, D14
- VMOVL.U8 Q11, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D20, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D22, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D20, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D22, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D18, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D18, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D18, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D18 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D20 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D22, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Done with the first 4 elements, continue on the next 4 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D21, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D23, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D21, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D23, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D19, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D19, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D19, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D19 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D21 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D23, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q11, Q11, Q4 @ if Q11 < 0, Q11 = 0
- VMIN.S16 Q11, Q11, Q5 @ if Q11 > 255, Q11 = 255
- VQMOVUN.S16 D28, Q11 @ store Blue to D28, narrow the value from int16 to int8
-
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D27, Q10 @ store Green to D27, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D26, Q9 @ store Red to D26, narrow the value from int16 to int8
-
- /*-------------------------------------------------------------------------
- * abgr format with leading 0xFF byte
- * ------------------------------------------------------------------------ */
- VMOVN.I16 D29, Q5 @ D29: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yvup2abgr @ jump to trailing processing if remaining length is less than 8
-
- VST4.U8 {D26,D27,D28,D29}, [p_bgr]! @ vector store Red, Green, Blue to destination
- @ Blue at LSB
-
- BHI loop_yvup2abgr @ loop if more than 8 pixels left
-
- BEQ end_yvup2abgr @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yvup2abgr:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST4.U8 {D26[0], D27[0], D28[0], D29[0]}, [p_bgr]! @ at least 1 pixel left in the trailing part
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[1], D27[1], D28[1], D29[1]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[2], D27[2], D28[2], D29[2]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[3], D27[3], D28[3], D29[3]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[4], D27[4], D28[4], D29[4]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[5], D27[5], D28[5], D29[5]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D26[6], D27[6], D28[6], D29[6]}, [p_bgr]! @ store one more pixel
-
-end_yvup2abgr:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
- @ end of yvup2abgr
-
-/*--------------------------------------------------------------------------
-* FUNCTION : yyvup2abgr8888_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YYVU planar to ABGR8888 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yyvup2abgr8888_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_abgr8888,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_abgr8888
-* pointer to the output ABGR Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_abgr8888 - the converted ABGR pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yyvup2abgr8888_venum, %function
-yyvup2abgr8888_venum:
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -70688 | -70688 | -70688 | -70688
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yyvup2abgr:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12, D13: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14, Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD2.U8 {D12,D13}, [p_y]! @ Load 16 Luma elements (uint8) to D12, D13
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D24, D25: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14
- * D26, D27: Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D28, D29: V0 V1 V2 V3 V4 V5 V6 V7
- * D30, D31: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q12, D12
- VMOVL.U8 Q13, D13
- VMOVL.U8 Q14, D14
- VMOVL.U8 Q15, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D28, D6[0] @ Q6: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q7, D30, D6[1] @ Q7: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q7, D28, D6[2] @ Q7: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q8, D30, D6[3] @ Q8: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D24, D7[0] @ Q6: R0, R2, R4, R6 in 32-bit Q8 format
- VMLAL.S16 Q9, D26, D7[0] @ Q9: R1, R3, R5, R7 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D24, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D26, D7[0] @ Q10: G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D24, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D26, D7[0] @ Q11: B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R0 R2 R4 R6 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R1 R3 R5 R7 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6 : R0 R1 R2 R3 R4 R5 R6 R7
-
- VSHRN.S32 D18, Q7, #8 @ D18: G0 G2 G4 G6 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G1 G3 G5 G7 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9 : G0 G1 G2 G3 G4 G5 G6 G7
-
- VSHRN.S32 D20, Q8, #8 @ D20: B0 B2 B4 B6 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B1 B3 B5 B7 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B0 B1 B2 B3 B4 B5 B6 B7
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D23, Q10 @ store Blue to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D21, Q6 @ store Red to D21, narrow the value from int16 to int8
-
- /*-------------------------------------------------------------------------
- * abgr format with leading 0xFF byte
- * ------------------------------------------------------------------------ */
- VMOVN.I16 D24, Q5 @ D24: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2abgr @ jump to trailing processing if remaining length is less than 8
-
- VST4.U8 {D21,D22,D23,D24}, [p_bgr]! @ vector store Blue, Green, Red to destination
- @ Red at LSB
-
- BEQ end_yyvup2abgr @ done if exactly 8 pixel processed in the loop
-
-
- /*-------------------------------------------------------------------------
- * Done with the first 8 elements, continue on the next 8 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D29, D6[0] @ Q6: 359*(V4,V5,V6,V7) Red
- VMULL.S16 Q7, D31, D6[1] @ Q7: -88*(U4,U5,U6,U7) Green
- VMLAL.S16 Q7, D29, D6[2] @ Q7: -88*(U4,U5,U6,U7) - 183*(V4,V5,V6,V7)
- VMULL.S16 Q8, D31, D6[3] @ Q8: 454*(U4,U5,U6,U7) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D25, D7[0] @ Q6: R8 R10 R12 R14 in 32-bit Q8 format
- VMLAL.S16 Q9, D27, D7[0] @ Q9: R9 R11 R13 R15 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D25, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D27, D7[0] @ Q10 : G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D25, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D27, D7[0] @ Q11 : B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R8 R10 R12 R14 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R9 R11 R13 R15 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6: R8 R9 R10 R11 R12 R13 R14 R15
-
- VSHRN.S32 D18, Q7, #8 @ D18: G8 G10 G12 G14 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G9 G11 G13 G15 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9: G8 G9 G10 G11 G12 G13 G14 G15
-
- VSHRN.S32 D20, Q8, #8 @ D20: B8 B10 B12 B14 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B9 B11 B13 B15 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B8 B9 B10 B11 B12 B13 B14 B15
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D23, Q10 @ store Blue to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D21, Q6 @ store Red to D21, narrow the value from int16 to int8
-
- /*-------------------------------------------------------------------------
- * abgr format with leading 0xFF byte
- * ------------------------------------------------------------------------ */
- VMOVN.I16 D24, Q5 @ D24: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2abgr @ jump to trailing processing if remaining length is less than 8
-
- VST4.U8 {D21,D22,D23,D24}, [p_bgr]! @ vector store Blue, Green, Red to destination
- @ Red at LSB
-
- BHI loop_yyvup2abgr @ loop if more than 8 pixels left
-
- BEQ end_yyvup2abgr @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yyvup2abgr:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST4.U8 {D21[0],D22[0],D23[0],D24[0]}, [p_bgr]! @ at least 1 pixel left in the trailing part
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[1],D22[1],D23[1],D24[1]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[2],D22[2],D23[2],D24[2]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[3],D22[3],D23[3],D24[3]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[4],D22[4],D23[4],D24[4]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[5],D22[5],D23[5],D24[5]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2abgr @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST4.U8 {D21[6],D22[6],D23[6],D24[6]}, [p_bgr]! @ store one more pixel
-
-end_yyvup2abgr:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
- @ end of yyvup2abgr
-
-.end
-
diff --git a/libjpegtwrp/asm/armv7/jdcolor-armv7.S b/libjpegtwrp/asm/armv7/jdcolor-armv7.S
deleted file mode 100644
index b2da6d5d0..000000000
--- a/libjpegtwrp/asm/armv7/jdcolor-armv7.S
+++ /dev/null
@@ -1,632 +0,0 @@
-/*------------------------------------------------------------------------
-* jdcolor-armv7.S
-*
-* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions are
-* met:
-* * Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* * Redistributions in binary form must reproduce the above
-* copyright notice, this list of conditions and the following
-* disclaimer in the documentation and/or other materials provided
-* with the distribution.
-* * Neither the name of Code Aurora Forum, Inc. nor the names of its
-* contributors may be used to endorse or promote products derived
-* from this software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
-* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
-* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*--------------------------------------------------------------------------
-
-*--------------------------------------------------------------------------
-* FUNCTION LIST
-*--------------------------------------------------------------------------
-*
-* - yvup2bgr888_venum
-* - yyvup2bgr888_venum
-*
-*--------------------------------------------------------------------------
-*/
-
- .section yvu_plain_to_bgr, "x" @ AREA
- .text @ |.text|, CODE, READONLY
- .align 2
- .code 32 @ CODE32
-
-/*-----------------------------------------------------------------------------
- * ARM Registers
- * ---------------------------------------------------------------------------- */
-p_y .req r0
-p_cr .req r1
-p_cb .req r2
-p_rgb .req r3
-p_bgr .req r3
-length .req r12
-
- .global yvup2bgr888_venum
- .global yyvup2bgr888_venum
-
-@ coefficients in color conversion matrix multiplication
-.equ COEFF_Y, 256 @ contribution of Y
-.equ COEFF_V_RED, 359 @ contribution of V for red
-.equ COEFF_U_GREEN, -88 @ contribution of U for green
-.equ COEFF_V_GREEN, -183 @ contribution of V for green
-.equ COEFF_U_BLUE, 454 @ contribution of U for blue
-
-@ Clamping constants 0x0 and 0xFF
-.equ COEFF_0, 0
-.equ COEFF_255, 255
-
-@ Bias coefficients for red, green and blue
-.equ COEFF_BIAS_R, -45824 @ Red bias = -359*128 + 128
-.equ COEFF_BIAS_G, 34816 @ Green bias = (88+183)*128 + 128
-.equ COEFF_BIAS_B, -57984 @ Blue bias = -454*128 + 128
-
-constants:
- .hword (COEFF_V_RED), (COEFF_U_GREEN), (COEFF_V_GREEN), (COEFF_U_BLUE) @ 359 | -88 | -183 | 454
- .hword (COEFF_Y), (COEFF_0), (COEFF_255) , (COEFF_0) @ 256 | 0 | 255 | 0
- .word (COEFF_BIAS_R), (COEFF_BIAS_G), (COEFF_BIAS_B) @ -45824 | 34816 | -57984 | X
-
-/*--------------------------------------------------------------------------
-* FUNCTION : yvup2bgr888_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YVU planar to BGR888 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yvup2bgr888_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_bgr888,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_bgr888
-* pointer to the output BGR Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_bgr888 - the converted bgr pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yvup2bgr888_venum, %function
-yvup2bgr888_venum:
-
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -57984 | -57984 | -57984 | -57984
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yvup2bgr888:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12 : Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD1.U8 {D12}, [p_y]! @ Load 8 Luma elements (uint8) to D12
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D18, D19: Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
- * D20, D21: V0 V1 V2 V3 V4 V5 V6 V7
- * D22, D23: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q9, D12
- VMOVL.U8 Q10, D14
- VMOVL.U8 Q11, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D20, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D22, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D20, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D22, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D18, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D18, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D18, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D18 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D20 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D22, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Done with the first 4 elements, continue on the next 4 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q12, D21, D6[0] @ Q12: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q13, D23, D6[1] @ Q13: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q13, D21, D6[2] @ Q13: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q14, D23, D6[3] @ Q14: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q12, Q0 @ Q12 add Red bias -45824
- VADD.S32 Q13, Q1 @ Q13 add Green bias 34816
- VADD.S32 Q14, Q2 @ Q14 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMLAL.S16 Q12, D19, D7[0] @ Q12: R0, R1, R2, R3 in 32-bit Q8 format
- VMLAL.S16 Q13, D19, D7[0] @ Q13: G0, G1, G2, G3 in 32-bit Q8 format
- VMLAL.S16 Q14, D19, D7[0] @ Q14: B0, B1, B2, B3 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D19 , Q12, #8 @ D18: R0, R1, R2, R3 in 16-bit Q0 format
- VSHRN.S32 D21 , Q13, #8 @ D20: G0, G1, G2, G3 in 16-bit Q0 format
- VSHRN.S32 D23, Q14, #8 @ D22: B0, B1, B2, B3 in 16-bit Q0 format
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q11, Q11, Q4 @ if Q11 < 0, Q11 = 0
- VMIN.S16 Q11, Q11, Q5 @ if Q11 > 255, Q11 = 255
- VQMOVUN.S16 D28, Q11 @ store Blue to D28, narrow the value from int16 to int8
-
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D27, Q10 @ store Green to D27, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D26, Q9 @ store Red to D26, narrow the value from int16 to int8.
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yvup2bgr888 @ jump to trailing processing if remaining length is less than 8
-
- VST3.U8 {D26,D27,D28}, [p_bgr]! @ vector store Red, Green, Blue to destination
- @ Blue at LSB
-
- BHI loop_yvup2bgr888 @ loop if more than 8 pixels left
-
- BEQ end_yvup2bgr888 @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yvup2bgr888:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST3.U8 {D26[0], D27[0], D28[0]}, [p_bgr]! @ at least 1 pixel left in the trailing part
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[1], D27[1], D28[1]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[2], D27[2], D28[2]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[3], D27[3], D28[3]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[4], D27[4], D28[4]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[5], D27[5], D28[5]}, [p_bgr]! @ store one more pixel
- BEQ end_yvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D26[6], D27[6], D28[6]}, [p_bgr]! @ store one more pixel
-
-end_yvup2bgr888:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
-
- @ end of yvup2bgr888
-
-
-/*-------------------------------------------------------------------------
-* FUNCTION : yyvup2bgr888_venum
-*--------------------------------------------------------------------------
-* DESCRIPTION : Perform YYVU planar to BGR888 conversion.
-*--------------------------------------------------------------------------
-* C PROTOTYPE : void yyvup2bgr888_venum(uint8_t *p_y,
-* uint8_t *p_cr,
-* uint8_t *p_cb,
-* uint8_t *p_bgr888,
-* uint32_t length)
-*--------------------------------------------------------------------------
-* REG INPUT : R0: uint8_t *p_y
-* pointer to the input Y Line
-* R1: uint8_t *p_cr
-* pointer to the input Cr Line
-* R2: uint8_t *p_cb
-* pointer to the input Cb Line
-* R3: uint8_t *p_bgr888
-* pointer to the output BGR Line
-* R12: uint32_t length
-* width of Line
-*--------------------------------------------------------------------------
-* STACK ARG : None
-*--------------------------------------------------------------------------
-* REG OUTPUT : None
-*--------------------------------------------------------------------------
-* MEM INPUT : p_y - a line of Y pixels
-* p_cr - a line of Cr pixels
-* p_cb - a line of Cb pixels
-* length - the width of the input line
-*--------------------------------------------------------------------------
-* MEM OUTPUT : p_bgr888 - the converted bgr pixels
-*--------------------------------------------------------------------------
-* REG AFFECTED : ARM: R0-R4, R12
-* NEON: Q0-Q15
-*--------------------------------------------------------------------------
-* STACK USAGE : none
-*--------------------------------------------------------------------------
-* CYCLES : none
-*
-*--------------------------------------------------------------------------
-* NOTES :
-*--------------------------------------------------------------------------
-*/
-.type yyvup2bgr888_venum, %function
-yyvup2bgr888_venum:
- /*-------------------------------------------------------------------------
- * Store stack registers
- * ------------------------------------------------------------------------ */
- STMFD SP!, {LR}
-
- VPUSH {D8-D15}
-
- PLD [R0, R3] @ preload luma line
-
- ADR R12, constants
-
- VLD1.S16 {D6, D7}, [R12]! @ D6, D7: 359 | -88 | -183 | 454 | 256 | 0 | 255 | 0
- VLD1.S32 {D30, D31}, [R12] @ Q15 : -45824 | 34816 | -57984 | X
-
- /*-------------------------------------------------------------------------
- * Load the 5th parameter via stack
- * R0 ~ R3 are used to pass the first 4 parameters, the 5th and above
- * parameters are passed via stack
- * ------------------------------------------------------------------------ */
- LDR R12, [SP, #68] @ LR is pushed into the stack so SP is
- @ decreased by 4,
- @ D8-D15 are also pushed into the stack
- @ so SP is decreased by
- @ 8-byte/D-Register * 8 D-Registers = 64,
- @ so SP needs to be increased by 64+4=68
- @ to get the value that was first pushed
- @ into stack (the 5th parameter passed in
- @ throught stack)
-
- /*-------------------------------------------------------------------------
- * Load clamping parameters to duplicate vector elements
- * ------------------------------------------------------------------------ */
- VDUP.S16 Q4, D7[1] @ Q4: 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
- VDUP.S16 Q5, D7[2] @ Q5: 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255
-
- /*-------------------------------------------------------------------------
- * Read bias
- * ------------------------------------------------------------------------ */
- VDUP.S32 Q0, D30[0] @ Q0: -45824 | -45824 | -45824 | -45824
- VDUP.S32 Q1, D30[1] @ Q1: 34816 | 34816 | 34816 | 34816
- VDUP.S32 Q2, D31[0] @ Q2: -70688 | -70688 | -70688 | -70688
-
-
- /*-------------------------------------------------------------------------
- * The main loop
- * ------------------------------------------------------------------------ */
-loop_yyvup2bgr888:
-
- /*-------------------------------------------------------------------------
- * Load input from Y, V and U
- * D12, D13: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14, Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D14 : V0 V1 V2 V3 V4 V5 V6 V7
- * D15 : U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VLD2.U8 {D12,D13}, [p_y]! @ Load 16 Luma elements (uint8) to D12, D13
- VLD1.U8 {D14}, [p_cr]! @ Load 8 Cr elements (uint8) to D14
- VLD1.U8 {D15}, [p_cb]! @ Load 8 Cb elements (uint8) to D15
-
- /*-------------------------------------------------------------------------
- * Expand uint8 value to uint16
- * D24, D25: Y0 Y2 Y4 Y6 Y8 Y10 Y12 Y14
- * D26, D27: Y1 Y3 Y5 Y7 Y9 Y11 Y13 Y15
- * D28, D29: V0 V1 V2 V3 V4 V5 V6 V7
- * D30, D31: U0 U1 U2 U3 U4 U5 U6 U7
- * ------------------------------------------------------------------------ */
- VMOVL.U8 Q12, D12
- VMOVL.U8 Q13, D13
- VMOVL.U8 Q14, D14
- VMOVL.U8 Q15, D15
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D28, D6[0] @ Q6: 359*(V0,V1,V2,V3) Red
- VMULL.S16 Q7, D30, D6[1] @ Q7: -88*(U0,U1,U2,U3) Green
- VMLAL.S16 Q7, D28, D6[2] @ q7: -88*(U0,U1,U2,U3) - 183*(V0,V1,V2,V3)
- VMULL.S16 Q8, D30, D6[3] @ q8: 454*(U0,U1,U2,U3) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -57984
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D24, D7[0] @ Q6: R0, R2, R4, R6 in 32-bit Q8 format
- VMLAL.S16 Q9, D26, D7[0] @ Q9: R1, R3, R5, R7 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D24, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D26, D7[0] @ Q10: G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D24, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D26, D7[0] @ Q11: B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R0 R2 R4 R6 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R1 R3 R5 R7 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6 : R0 R1 R2 R3 R4 R5 R6 R7
-
- VSHRN.S32 D18, Q7, #8 @ D18: G0 G2 G4 G6 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G1 G3 G5 G7 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9 : G0 G1 G2 G3 G4 G5 G6 G7
-
- VSHRN.S32 D20, Q8, #8 @ D20: B0 B2 B4 B6 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B1 B3 B5 B7 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B0 B1 B2 B3 B4 B5 B6 B7
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D23, Q10 @ store Blue to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D21, Q6 @ store Red to D21, narrow the value from int16 to int8
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2bgr888 @ jump to trailing processing if remaining length is less than 8
-
- VST3.U8 {D21,D22,D23}, [p_bgr]! @ vector store Blue, Green, Red to destination
- @ Red at LSB
-
- BEQ end_yyvup2bgr888 @ done if exactly 8 pixel processed in the loop
-
- /*-------------------------------------------------------------------------
- * Done with the first 8 elements, continue on the next 8 elements
- * ------------------------------------------------------------------------ */
-
- /*-------------------------------------------------------------------------
- * Multiply contribution from chrominance, results are in 32-bit
- * ------------------------------------------------------------------------ */
- VMULL.S16 Q6, D29, D6[0] @ Q6: 359*(V4,V5,V6,V7) Red
- VMULL.S16 Q7, D31, D6[1] @ Q7: -88*(U4,U5,U6,U7) Green
- VMLAL.S16 Q7, D29, D6[2] @ Q7: -88*(U4,U5,U6,U7) - 183*(V4,V5,V6,V7)
- VMULL.S16 Q8, D31, D6[3] @ Q8: 454*(U4,U5,U6,U7) Blue
-
- /*-------------------------------------------------------------------------
- * Add bias
- * ------------------------------------------------------------------------ */
- VADD.S32 Q6, Q0 @ Q6 add Red bias -45824
- VADD.S32 Q7, Q1 @ Q7 add Green bias 34816
- VADD.S32 Q8, Q2 @ Q8 add Blue bias -70688
-
- /*-------------------------------------------------------------------------
- * Calculate Red, Green, Blue
- * ------------------------------------------------------------------------ */
- VMOV.S32 Q9, Q6
- VMLAL.S16 Q6, D25, D7[0] @ Q6: R8 R10 R12 R14 in 32-bit Q8 format
- VMLAL.S16 Q9, D27, D7[0] @ Q9: R9 R11 R13 R15 in 32-bit Q8 format
-
- VMOV.S32 Q10, Q7
- VMLAL.S16 Q7, D25, D7[0] @ Q7: G0, G2, G4, G6 in 32-bit Q8 format
- VMLAL.S16 Q10, D27, D7[0] @ Q10 : G1, G3, G5, G7 in 32-bit Q8 format
-
- VMOV.S32 Q11, Q8
- VMLAL.S16 Q8, D25, D7[0] @ Q8: B0, B2, B4, B6 in 32-bit Q8 format
- VMLAL.S16 Q11, D27, D7[0] @ Q11 : B1, B3, B5, B7 in 32-bit Q8 format
-
- /*-------------------------------------------------------------------------
- * Right shift eight bits with rounding
- * ------------------------------------------------------------------------ */
- VSHRN.S32 D12, Q6, #8 @ D12: R8 R10 R12 R14 in 16-bit Q0 format
- VSHRN.S32 D13, Q9, #8 @ D13: R9 R11 R13 R15 in 16-bit Q0 format
- VZIP.16 D12, D13 @ Q6: R8 R9 R10 R11 R12 R13 R14 R15
-
- VSHRN.S32 D18, Q7, #8 @ D18: G8 G10 G12 G14 in 16-bit Q0 format
- VSHRN.S32 D19, Q10, #8 @ D19: G9 G11 G13 G15 in 16-bit Q0 format
- VZIP.16 D18, D19 @ Q9: G8 G9 G10 G11 G12 G13 G14 G15
-
- VSHRN.S32 D20, Q8, #8 @ D20: B8 B10 B12 B14 in 16-bit Q0 format
- VSHRN.S32 D21, Q11, #8 @ D21: B9 B11 B13 B15 in 16-bit Q0 format
- VZIP.16 D20, D21 @ Q10: B8 B9 B10 B11 B12 B13 B14 B15
-
- /*-------------------------------------------------------------------------
- * Clamp the value to be within [0~255]
- * ------------------------------------------------------------------------ */
- VMAX.S16 Q10, Q10, Q4 @ if Q10 < 0, Q10 = 0
- VMIN.S16 Q10, Q10, Q5 @ if Q10 > 255, Q10 = 255
- VQMOVUN.S16 D23, Q10 @ store Blue to D23, narrow the value from int16 to int8
-
- VMAX.S16 Q9, Q9, Q4 @ if Q9 < 0, Q9 = 0
- VMIN.S16 Q9, Q9, Q5 @ if Q9 > 255, Q9 = 255
- VQMOVUN.S16 D22, Q9 @ store Green to D22, narrow the value from int16 to int8
-
- VMAX.S16 Q6, Q6, Q4 @ if Q6 < 0, Q6 = 0
- VMIN.S16 Q6, Q6, Q5 @ if Q6 > 255, Q6 = 255
- VQMOVUN.S16 D21, Q6 @ store Red to D21, narrow the value from int16 to int8
-
-
- SUBS length, length, #8 @ check if the length is less than 8
-
- BMI trailing_yyvup2bgr888 @ jump to trailing processing if remaining length is less than 8
-
- VST3.U8 {D21,D22,D23}, [p_bgr]! @ vector store Blue, Green, Red to destination
- @ Red at LSB
-
- BHI loop_yyvup2bgr888 @ loop if more than 8 pixels left
-
- BEQ end_yyvup2bgr888 @ done if exactly 8 pixel processed in the loop
-
-
-trailing_yyvup2bgr888:
- /*-------------------------------------------------------------------------
- * There are from 1 ~ 7 pixels left in the trailing part.
- * First adding 7 to the length so the length would be from 0 ~ 6.
- * eg: 1 pixel left in the trailing part, so 1-8+7 = 0.
- * Then save 1 pixel unconditionally since at least 1 pixels left in the
- * trailing part.
- * ------------------------------------------------------------------------ */
- ADDS length, length, #7 @ there are 7 or less in the trailing part
-
- VST3.U8 {D21[0],D22[0],D23[0]}, [p_bgr]! @ at least 1 pixel left in the trailing part
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[1],D22[1],D23[1]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[2],D22[2],D23[2]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[3],D22[3],D23[3]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[4],D22[4],D23[4]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[5],D22[5],D23[5]}, [p_bgr]! @ store one more pixel
- BEQ end_yyvup2bgr888 @ done if 0 pixel left
-
- SUBS length, length, #1 @ update length counter
- VST3.U8 {D21[6],D22[6],D23[6]}, [p_bgr]! @ store one more pixel
-
-end_yyvup2bgr888:
- VPOP {D8-D15}
- LDMFD SP!, {PC}
-
- @ end of yyvup2bgr888
-
-.end
diff --git a/libjpegtwrp/asm/armv7/jdidct-armv7.S b/libjpegtwrp/asm/armv7/jdidct-armv7.S
deleted file mode 100644
index d61e219f7..000000000
--- a/libjpegtwrp/asm/armv7/jdidct-armv7.S
+++ /dev/null
@@ -1,762 +0,0 @@
-/*=========================================================================
-* jdidct-armv7.s
-*
-* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions are
-* met:
-* * Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* * Redistributions in binary form must reproduce the above
-* copyright notice, this list of conditions and the following
-* disclaimer in the documentation and/or other materials provided
-* with the distribution.
-* * Neither the name of Code Aurora Forum, Inc. nor the names of its
-* contributors may be used to endorse or promote products derived
-* from this software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
-* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
-* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
-* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*==========================================================================
-
-*==========================================================================
-* FUNCTION LIST
-*--------------------------------------------------------------------------
-* - idct_1x1_venum
-* - idct_2x2_venum
-* - idct_4x4_venum
-* - idct_8x8_venum
-*
-*==========================================================================
-*/
-
-@==========================================================================
-@ MACRO DEFINITION
-@==========================================================================
- .macro Transpose8x8
- @==================================================================
- @ Transpose an 8 x 8 x 16 bit matrix in place
- @ Input: q8 to q15
- @ Output: q8 to q15
- @ Registers used: q8 to q15
- @ Assumptions: 8 x 8 x 16 bit data
- @==================================================================
-
- vswp d17, d24 @q8, q12
- vswp d23, d30 @q11, q15
- vswp d21, d28 @q10, q14
- vswp d19, d26 @q9, q13
-
- vtrn.32 q8, q10
- vtrn.32 q9, q11
- vtrn.32 q12, q14
- vtrn.32 q13, q15
-
- vtrn.16 q8, q9
- vtrn.16 q10, q11
- vtrn.16 q12, q13
- vtrn.16 q14, q15
- .endm
-
- .macro IDCT1D
- @==================================================================
- @ One dimensional 64 element inverse DCT
- @ Input: q8 to q15 loaded with data
- @ q0 loaded with constants
- @ Output: q8 to q15
- @ Registers used: q0, q4 to q15
- @ Assumptions: 16 bit data, first elements in least significant
- @ halfwords
- @==================================================================
-
- @1st stage
- vqrdmulh.s16 q4, q15, d0[2] @q4 = a1*vx7
- vqrdmulh.s16 q5, q9, d0[2] @q5 = a1*vx1
- vqrdmulh.s16 q6, q13, d0[3] @q6 = a2*vx5
- vqrdmulh.s16 q7, q11, d1[1] @q7 = ma2*vx3
- vqrdmulh.s16 q2, q14, d0[1] @q6 = a0*vx6
- vqrdmulh.s16 q3, q10, d0[1] @q7 = a0*vx2
- vqadd.s16 q9, q4, q9 @q9 = t1 = a1*vx7 + vx1
- vqsub.s16 q5, q5, q15 @q5 = t8 = a1*vx1 - vx7
- vqadd.s16 q15, q6, q11 @q15 = t7 = a2*vx5 + vx3
- vqadd.s16 q11, q7, q13 @q11 = t3 = ma2*vx3 + vx5
-
- @2nd stage
- vqadd.s16 q13, q8, q12 @q13 = t5 = vx0 + vx4
- vqsub.s16 q8, q8, q12 @q8 = t0 = vx0 - vx4
- vqadd.s16 q10, q2, q10 @q10 = t2 = a0*vx6 + vx2
- vqsub.s16 q12, q3, q14 @q12 = t4 = a0*vx2 - vx6
- vqadd.s16 q14, q5, q11 @q14 = t6 = t8 + t3
- vqsub.s16 q11, q5, q11 @q11 = t3 = t8 - t3
- vqsub.s16 q5, q9, q15 @q5 = t8 = t1 - t7
- vqadd.s16 q9, q9, q15 @q9 = t1 = t1 + t7
-
- @3rd stage
- vqadd.s16 q15, q13, q10 @q15 = t7 = t5 + t2
- vqsub.s16 q10, q13, q10 @q10 = t2 = t5 - t2
- vqadd.s16 q13, q8, q12 @q13 = t5 = t0 + t4
- vqsub.s16 q7, q8, q12 @q7 = t0 = t0 - t4
- vqsub.s16 q12, q5, q11 @q12 = t4 = t8 - t3
- vqadd.s16 q11, q5, q11 @q11 = t3 = t8 + t3
-
- @4th stage
- vqadd.s16 q8, q15, q9 @q8 = vy0 = t7 + t1
- vqsub.s16 q15, q15, q9 @q15 = vy7 = t7 - t1
- vqrdmulh.s16 q6, q12, d0[0] @q6 = c4*t4
- vqrdmulh.s16 q4, q11, d0[0] @q4 = c4*t3
- vqsub.s16 q12, q10, q14 @q12 = vy4 = t2 - t6
- vqadd.s16 q11, q10, q14 @q11 = vy3 = t2 + t6
- vqadd.s16 q10, q7, q6 @q10 = vy2 = t0 + c4*t4
- vqsub.s16 q14, q13, q4 @q14 = vy6 = t5 - c4*t3
- vqadd.s16 q9, q13, q4 @q9 = vy1 = t5 + c4*t3
- vqsub.s16 q13, q7, q6 @q13 = vy5 = t0 - c4*t4
- .endm
-
- .macro PART1
- @==================================================================
- @ Load input input data from memory and shift
- @==================================================================
- vld1.16 {d16, d17},[r0]! @q8 =row0
- vqshl.s16 q8, q8, #4 @Input data too big?!!
- @Maximum MPEG input is 2047/-2048.
- vld1.16 {d18, d19},[r0]! @q9 =row1
- vqshl.s16 q9, q9, #4 @Shift 1 instead of 4
-
- vld1.16 {d20, d21},[r0]! @q10=row2
- vqshl.s16 q10, q10, #4
-
- vld1.16 {d22, d23},[r0]! @q11=row3
- vqshl.s16 q11, q11, #4
-
- vld1.16 {d24, d25},[r0]! @q12=row4
- vqshl.s16 q12, q12, #4
-
- vld1.16 {d26, d27},[r0]! @q13=row5
- vqshl.s16 q13, q13, #4
- vld1.16 {d28, d29},[r0]! @q14=row6
- vqshl.s16 q14, q14, #4
- vld1.16 {d30, d31},[r0]! @q15=row7
- vqshl.s16 q15, q15, #4
-
- @==================================================================
- @ refresh the constants that was clobbered last time through IDCT1D
- @==================================================================
- vld1.16 {d4, d5},[r7] @q2 =constants[2]
- vld1.16 {d6, d7},[r8] @q3 =constants[3]
- vld1.16 {d8, d9},[r9] @q4 =constants[4]
- .endm
-
- .macro PART2
- @==================================================================
- @ Prescale the input
- @==================================================================
- vqrdmulh.s16 q12, q12, q1 @q12=row4 * constants[1] = vx4
- vqrdmulh.s16 q15, q15, q2 @q15=row7 * constants[2] = vx7
- vqrdmulh.s16 q9, q9, q2 @q9 =row1 * constants[2] = vx1
- vqrdmulh.s16 q13, q13, q4 @q13=row5 * constants[4] = vx5
- vqrdmulh.s16 q11, q11, q4 @q11=row3 * constants[4] = vx3
- vqrdmulh.s16 q14, q14, q3 @q14=row6 * constants[3] = vx6
- vqrdmulh.s16 q10, q10, q3 @q10=row2 * constants[3] = vx2
- vqrdmulh.s16 q8, q8, q1 @q8 =row0 * constants[1] = vx0
-
- @==================================================================
- @ At thsi point, the input 8x8 x 16 bit coefficients are
- @ transposed, prescaled, and loaded in q8 to q15
- @ q0 loaded with scalar constants
- @ Perform 1D IDCT
- @==================================================================
- IDCT1D @perform 1d idct
-
- @==================================================================
- @ Transpose the intermediate results to get read for vertical
- @ transformation
- @==================================================================
- vswp d17, d24 @q8, q12
- vswp d23, d30 @q11, q15
- vswp d21, d28 @q10, q14
- vswp d19, d26 @q9, q13
-
- @==================================================================
- @ Load the bias
- @==================================================================
- vdup.32 q4, d1[1] @a cycle is saved by loading
- @the bias at this point
-
- @==================================================================
- @ Finish the transposition
- @==================================================================
- vtrn.32 q8, q10
- vtrn.32 q9, q11
- vtrn.32 q12, q14
- vtrn.32 q13, q15
- vtrn.16 q8, q9
- vtrn.16 q10, q11
- vtrn.16 q12, q13
- vtrn.16 q14, q15
-
- @==================================================================
- @ Add bias
- @==================================================================
- vqadd.s16 q8, q8, q4
-
- @==================================================================
- @ IDCT 2nd half
- @==================================================================
- IDCT1D @perform 1d dct
-
- @==================================================================
- @ Scale and clamp the output to correct range and save to memory
- @ 1. scale to 8bits by right shift 6
- @ 2. clamp output to [0, 255] by min/max
- @ 3. use multiple store. Each store will save one row of output.
- @ The st queue size is 4, so do no more than 4 str in sequence.
- @==================================================================
- ldr r5, =constants+5*16 @constants[5],
- vld1.16 d10, [r5] @load clamping parameters
- vdup.s16 q6, d10[0] @q6=[0000000000000000]
- vdup.s16 q7, d10[1] @q7=[FFFFFFFFFFFFFFFF]
-
- @Save the results
- vshr.s16 q8, q8, #6 @q8 = vy0
- vmax.s16 q8, q8, q6 @clamp >0
- vmin.s16 q8, q8, q7 @clamp <255
-
- vshr.s16 q9, q9, #6 @q9 = vy1
- vmax.s16 q9, q9, q6 @clamp >0
- vmin.s16 q9, q9, q7 @clamp <255
-
- vshr.s16 q10, q10, #6 @q10 = vy2
- vmax.s16 q10, q10, q6 @clamp >0
- vmin.s16 q10, q10, q7 @clamp <255
-
- vshr.s16 q11, q11, #6 @q11 = vy3
- vmax.s16 q11, q11, q6 @clamp >0
- vmin.s16 q11, q11, q7 @clamp <255
-
- vst1.16 {d16, d17},[r1],r2 @q8 =row0
- vst1.16 {d18, d19},[r1],r2 @q9 =row1
- vst1.16 {d20, d21},[r1],r2 @q10=row2
- vst1.16 {d22, d23},[r1],r2 @q11=row3
-
- vshr.s16 q12, q12, #6 @q12 = vy4
- vmax.s16 q12, q12, q6 @clamp >0
- vmin.s16 q12, q12, q7 @clamp <255
-
- vshr.s16 q13, q13, #6 @q13 = vy5
- vmax.s16 q13, q13, q6 @clamp >0
- vmin.s16 q13, q13, q7 @clamp <255
-
- vshr.s16 q14, q14, #6 @q14 = vy6
- vmax.s16 q14, q14, q6 @clamp >0
- vmin.s16 q14, q14, q7 @clamp <255
-
- vshr.s16 q15, q15, #6 @q15 = vy7
- vmax.s16 q15, q15, q6 @clamp >0
- vmin.s16 q15, q15, q7 @clamp <255
-
- vst1.16 {d24, d25},[r1],r2 @q12=row4
- vst1.16 {d26, d27},[r1],r2 @q13=row5
- vst1.16 {d28, d29},[r1],r2 @q14=row6
- vst1.16 {d30, d31},[r1] @q15=row7
- .endm
-
- .macro BIG_BODY_TRANSPOSE_INPUT
- @==================================================================
- @ Main body of idct
- @==================================================================
- PART1
- Transpose8x8
- PART2
- .endm
-
- .macro IDCT_ENTRY
- @==================================================================
- @ Load the locations of the constants
- @==================================================================
- ldr r5, =constants+0*16 @constants[0]
- ldr r6, =constants+1*16 @constants[1]
- ldr r7, =constants+2*16 @constants[2]
- ldr r8, =constants+3*16 @constants[3]
- ldr r9, =constants+4*16 @constants[4]
-
- @==================================================================
- @ Load the coefficients
- @ only some input coefficients are load due to register constrain
- @==================================================================
- vld1.16 {d0, d1},[r5] @q0 =constants[0] (scalars)
- vld1.16 {d2, d3},[r6] @q1 =constants[1]
- .endm
-@==========================================================================
-@ END of MACRO DEFINITION
-@==========================================================================
-
-
- .section idct_func, "x" @ ARE
- .text @ idct_func, CODE, READONLY
- .align 2
- .code 32 @ CODE32
-
-@==========================================================================
-@ Main Routine
-@==========================================================================
-
- .global idct_1x1_venum
- .global idct_2x2_venum
- .global idct_4x4_venum
- .global idct_8x8_venum
-
-@==========================================================================
-@ FUNCTION : idct_1x1_venum
-@--------------------------------------------------------------------------
-@ DISCRIPTION : ARM optimization of one 1x1 block iDCT
-@--------------------------------------------------------------------------
-@ C PROTOTYPE : void idct_1x1_venum(int16 * input,
-@ int16 * output,
-@ int32 stride)
-@--------------------------------------------------------------------------
-@ REG INPUT : R0 pointer to input (int16)
-@ R1 pointer to output (int16)
-@ R2 block stride
-@--------------------------------------------------------------------------
-@ STACK ARG : None
-@--------------------------------------------------------------------------
-@ MEM INPUT : None
-@--------------------------------------------------------------------------
-@ REG OUTPUT : None
-@--------------------------------------------------------------------------
-@ MEM OUTPUT : None
-@--------------------------------------------------------------------------
-@ REG AFFECTED : R0 - R2
-@--------------------------------------------------------------------------
-@ STACK USAGE : none
-@--------------------------------------------------------------------------
-@ CYCLES : 17 cycles
-@--------------------------------------------------------------------------
-@ NOTES :
-@ This idct_1x1_venum code was developed with ARM instruction set.
-@
-@ ARM REGISTER ALLOCATION
-@ =========================================================================
-@ r0 : pointer to input data
-@ r1 : pointer to output area
-@ r2 : stride in the output buffer
-@==========================================================================
-.type idct_1x1_venum, %function
-idct_1x1_venum:
-
- ldrsh r3, [r0] @ Load signed half word (int16)
- ldr r2, =1028 @ 1028 = 4 + 128 << 3
- @ 4 for rounding, 128 for offset
- add r2, r3, r2
- asrs r2, r2, #3 @ Divide by 8, and set status bit
- movmi r2, #0 @ Clamp to be greater than 0
- cmp r2, #255
- movgt r2, #255 @ Clamp to be less than 255
- str r2, [r1] @ Save output
- bx lr @ Return to caller
-
- @ end of idct_1x1_venum
-
-
-@==========================================================================
-@ FUNCTION : idct_2x2_venum
-@--------------------------------------------------------------------------
-@ DISCRIPTION : VeNum optimization of one 2x2 block iDCT
-@--------------------------------------------------------------------------
-@ C PROTOTYPE : void idct_2x2_venum(int16 * input,
-@ int16 * output,
-@ int32 stride)
-@--------------------------------------------------------------------------
-@ REG INPUT : R0 pointer to input (int16)
-@ R1 pointer to output (int16)
-@ R2 block stride
-@--------------------------------------------------------------------------
-@ STACK ARG : None
-@--------------------------------------------------------------------------
-@ MEM INPUT : None
-@--------------------------------------------------------------------------
-@ REG OUTPUT : None
-@--------------------------------------------------------------------------
-@ MEM OUTPUT : None
-@--------------------------------------------------------------------------
-@ REG AFFECTED : R0 - R2
-@--------------------------------------------------------------------------
-@ STACK USAGE : none
-@--------------------------------------------------------------------------
-@ CYCLES : 27 cycles
-@--------------------------------------------------------------------------
-@ NOTES : Output buffer must be an 8x8 16-bit buffer
-@
-@ ARM REGISTER ALLOCATION
-@ ==========================================
-@ r0 : pointer to input data
-@ r1 : pointer to output area
-@ r2 : stride in the output buffer
-@ -------------------------------------------
-@
-@ VENUM REGISTER ALLOCATION
-@ =================================================
-@ q0 : output x0 - x4
-@ q1 : not used
-@ q2 : not used
-@ q3 : not used
-@ q4 : not used
-@ q5 : not used
-@ q6 : not used
-@ q7 : not used
-@ q8 : input y0 - y4
-@ q9 : intermediate value
-@ q10 : intermediate value
-@ q11 : offset value
-@ q12 : clamp value
-@ q13 : not used
-@ q14 : not used
-@ q15 : not used
-@==========================================================================
-.type idct_2x2_venum, %function
-idct_2x2_venum:
-
- vld4.32 {d16, d17, d18, d19}, [r0]
- @ d16: y0 | y1 | y2 | y3 (LSB | MSB)
-
- vtrn.32 d16, d17 @ d16: y0 | y1 | X | X
- @ d17: y2 | y3 | X | X
-
- vqadd.s16 d18, d16, d17 @ d18: y0+y2 | y1+y3 | X | X q: saturated
- vqsub.s16 d19, d16, d17 @ d19: y0-y2 | y1-y3 | X | X q: saturated
-
- vtrn.16 d18, d19 @ d18: y0+y2 | y0-y2 | X | X
- @ d19: y1+y3 | y1-y3 | X | X
-
- vqadd.s16 d20, d18, d19 @ d20: (y0+y2)+(y1+y3) | (y0-y2)+(y1-y3)
- @ x0 | x2 | X | X
- vqsub.s16 d21, d18, d19 @ d21: (y0+y2)-(y1+y3) | (y0-y2)-(y1-y3)
- @ x1 | x3 | X | X
-
- vtrn.16 d20, d21 @ d20: x0 | x1 | X | X
- @ d21: x2 | x3 | X | X
-
- vrshr.s16 q10, q10, #3 @ Divide by 8
-
- vmov.i16 q11, #128 @ q11 = 128|128|128|128|128|128|128|128
- vqadd.s16 q0, q10, q11 @ Add offset to make output in [0,255]
-
- vmov.i16 q12, #0 @ q12 = [0000000000000000]
- vmov.i16 q13, #255 @ q13 = [FFFFFFFFFFFFFFFF] (hex)
-
- vmax.s16 q0, q0, q12 @ Clamp > 0
- vmin.s16 q0, q0, q13 @ Clamp < 255
-
- vstr d0, [r1] @ Store x0 | x1 | X | X
- @ Potential out of boundary issue
- add r1, r1, r2 @ Add the offset to the output pointer
- vstr d1, [r1] @ Store x2 | x3 | X | X
- @ Potential out of boundary issue
- bx lr @ Return to caller
-
- @ end of idct_2x2_venum
-
-
-@==========================================================================
-@ FUNCTION : idct_4x4_venum
-@--------------------------------------------------------------------------
-@ DISCRIPTION : VeNum optimization of one 4x4 block iDCT
-@--------------------------------------------------------------------------
-@ C PROTOTYPE : void idct_4x4_venum(int16 * input,
-@ int16 * output,
-@ int32 stride)
-@--------------------------------------------------------------------------
-@ REG INPUT : R0 pointer to input (int16)
-@ R1 pointer to output (int16)
-@ R2 block stride
-@--------------------------------------------------------------------------
-@ STACK ARG : None
-@--------------------------------------------------------------------------
-@ MEM INPUT : None
-@--------------------------------------------------------------------------
-@ REG OUTPUT : None
-@--------------------------------------------------------------------------
-@ MEM OUTPUT : None
-@--------------------------------------------------------------------------
-@ REG AFFECTED : R0 - R3, R12
-@--------------------------------------------------------------------------
-@ STACK USAGE : none
-@--------------------------------------------------------------------------
-@ CYCLES : 56 cycles
-@--------------------------------------------------------------------------
-@ NOTES :
-@
-@ ARM REGISTER ALLOCATION
-@ ==========================================
-@ r0 : pointer to input data
-@ r1 : pointer to output area
-@ r2 : stride in the output buffer
-@ r3 : pointer to the coefficient set
-@ r12 : pointer to the coefficient set
-@ -------------------------------------------
-@
-@ VENUM REGISTER ALLOCATION
-@ =================================================
-@ q0 : coefficients[0]
-@ q1 : coefficients[1]
-@ q2 : coefficients[2]
-@ q3 : coefficients[3]
-@ q4 : not used
-@ q5 : not used
-@ q6 : not used
-@ q7 : not used
-@ q8 : input y0 - y7
-@ q9 : input y8 - y15
-@ q10 : intermediate value
-@ q11 : intermediate value
-@ q12 : intermediate value
-@ q13 : intermediate value
-@ q14 : intermediate value
-@ q15 : intermediate value
-@==========================================================================
-.type idct_4x4_venum, %function
-idct_4x4_venum:
-
- @ Load the locations of the first 2 sets of coefficients
- ldr r3, =coefficient+0*16 @ coefficient[0]
- ldr r12, =coefficient+1*16 @ coefficient[1]
-
- @ Load the first 2 sets of coefficients
- vld1.16 {d0, d1},[r3] @ q0 = C4 | C2 | C4 | C6 | C4 | C2 | C4 | C6
- vld1.16 {d2, d3},[r12] @ q1 = C4 | C6 | C4 | C2 | C4 | C6 | C4 | C2
-
- @ Load the locations of the second 2 sets of coefficients
- ldr r3, =coefficient+2*16 @ coefficient[2]
- ldr r12, =coefficient+3*16 @ coefficient[3]
-
- @ Load the second 2 sets of coefficients
- vld1.16 {d4, d5},[r3] @ q2 = C4 | C4 | C4 | C4 | C2 | C2 | C2 | C2
- vld1.16 {d6, d7},[r12] @ q3 = C4 | C4 | C4 | C4 | C6 | C6 | C6 | C6
-
- @ Load the input values
- vld1.16 {d16}, [r0], r2 @ d16: y0 | y1 | y2 | y3 (LSB | MSB)
- vld1.16 {d17}, [r0], r2 @ d17: y4 | y5 | y6 | y7 (LSB | MSB)
- vld1.16 {d18}, [r0], r2 @ d18: y8 | y9 | y10 | y11 (LSB | MSB)
- vld1.16 {d19}, [r0], r2 @ d19: y12 | y13 | y14 | y15 (LSB | MSB)
-
- @ Apply iDCT Horizonally
-
- @ q8: y0 |y1 |y2 |y3 |y4 |y5 |y6 |y7
- @ q9: y8 |y9 |y10|y11|y12|y13|y14|y15
-
- @======================================================================
- @ vqrdmulh doubles the result and save the high 16 bits of the result,
- @ this is equivalent to right shift by 15 bits.
- @ since coefficients are in Q15 format, it contradicts with the right
- @ shift 15 here, so the final result is in Q0 format
- @
- @ vqrdmulh will also round the result
- @======================================================================
-
- vqrdmulh.s16 q10, q8, q0 @ q10: C4*y0 | C2*y1 | C4*y2 | C6*y3 | C4*y4 | C2*y5 | C4*y6 | C6*y7
- vqrdmulh.s16 q11, q8, q1 @ q11: C4*y0 | C6*y1 | C4*y2 | C2*y3 | C4*y4 | C6*y5 | C4*y6 | C2*y7
-
- vqrdmulh.s16 q12, q9, q0 @ q12: C4*y8 | C2*y9 | C4*y10 | C6*y11 | C4*y12 | C2*y13 | C4*y14 | C6*y15
- vqrdmulh.s16 q13, q9, q1 @ q13: C4*y8 | C6*y9 | C4*y10 | C2*y11 | C4*y12 | C6*y13 | C4*y14 | C2*y15
-
- vtrn.32 q10, q12 @ q10: C4*y0 | C2*y1 | C4*y8 | C2*y9 | C4*y4 | C2*y5 | C4*y12 | C2*y13
- @ q12: C4*y2 | C6*y3 | C4*y10 | C6*y11 | C4*y6 | C6*y7 | C4*y14 | C6*y15
-
- vtrn.32 q11, q13 @ q11: C4*y0 | C6*y1 | C4*y8 | C6*y9 | C4*y4 | C6*y5 | C4*y12 | C6*y13
- @ q13: C4*y2 | C2*y3 | C4*y10 | C2*y11 | C4*y6 | C2*y7 | C4*y14 | C2*y15
-
- vqadd.s16 q14, q10, q12 @ q14: C4*y0 + C4*y2 | C2*y1 + C6*y3 | C4*y8 + C4*y10 | C2*y9 + C6*y11 | C4*y4 + C4*y6 | C2*y5 + C6*y7 | C4*y12 + C4*y14 | C2*y13 + C6*y15
- @ S0 | S2 | S8 | S10 | S4 | S6 | S12 | S14
-
- vqsub.s16 q15, q11, q13 @ q15: C4*y0 - C4*y2 | C6*y1 - C2*y3 | C4*y8 - C4*y10 | C6*y9 - C2*y11 | C4*y4 - C4*y6 | C6*y5 - C2*y7 | C4*y12 - C4*y14 | C6*y13 - C2*y15
- @ S1 | S3 | S9 | S11 | S5 | S7 | S13 | S15
-
- vtrn.16 q14, q15 @ q14: S0 | S1 | S8 | S9 | S4 | S5 | S12 | S13
- @ q15: S2 | S3 | S10 | S11 | S6 | S7 | S14 | S15
-
- vqadd.s16 q8, q14, q15 @ q8: Z0 | Z1 | Z8 | Z9 | Z4 | Z5 | Z12 | Z13
- vqsub.s16 q9, q14, q15 @ q9: Z3 | Z2 | Z11 | Z10 | Z7 | Z6 | Z15 | Z14
- vrev32.16 q9, q9 @ q9: Z2 | Z3 | Z10 | Z11 | Z6 | Z7 | Z14 | Z15
-
-
- @ Apply iDCT Vertically
-
- vtrn.32 q8, q9 @ q8: Z0 | Z1 | Z2 | Z3 | Z4 | Z5 | Z6 | Z7
- @ q9: Z8 | Z9 | Z10 | Z11 | Z12 | Z13 | Z14 | Z15
-
-
- vqrdmulh.s16 q10, q8, q2 @ q10: C4*Z0 | C4*Z1 | C4*Z2 | C4*Z3 | C2*Z4 | C2*Z5 | C2*Z6 | C2*Z7
- vqrdmulh.s16 q11, q8, q3 @ q11: C4*Z0 | C4*Z1 | C4*Z2 | C4*Z3 | C6*Z4 | C6*Z5 | C6*Z6 | C6*Z7
-
- vqrdmulh.s16 q12, q9, q2 @ q12: C4*Z8 | C4*Z9 | C4*Z10 | C4*Z11 | C2*Z12 | C2*Z13 | C2*Z14 | C2*Z15
- vqrdmulh.s16 q13, q9, q3 @ q13: C4*Z8 | C4*Z9 | C4*Z10 | C4*Z11 | C6*Z12 | C6*Z13 | C6*Z14 | C6*Z15
-
- vqadd.s16 q14, q10, q13 @ q14: C4*Z0+C4*Z8 | C4*Z1+C4*Z9 | C4*Z2+C4*Z10 | C4*Z3+C4*Z11 | C2*Z4+C6*Z12 | C2*Z5+C6*Z13 | C2*Z6+C6*Z14 | C2*Z7+C6*Z15
- @ s0 | s4 | s8 | s12 | s2 | s6 | s10 | s14
-
- vqsub.s16 q15, q11, q12 @ q15: C4*Z0-C4*Z8 | C4*Z1-C4*Z9 | C4*Z2-C4*Z10 | C4*Z3-C4*Z11 | C6*Z4-C2*Z12 | C6*Z5-C2*Z13 | C6*Z6-C2*Z14 | C6*Z7-C2*Z15
- @ s1 | s5 | s9 | s13 | s3 | s7 | s11 | s15
-
- vswp d29, d30 @ q14: s0 | s4 | s8 | s12 | s1 | s5 | s9 | s13
- @ q15: s2 | s6 | s10 | s14 | s3 | s7 | s11 | s15
-
- vqadd.s16 q8, q14, q15 @ q8: x0 | x4 | x8 | x12 | x1 | x5 | x9 | x13
- vqsub.s16 q9, q14, q15 @ q9: x3 | x7 | x11 | x15 | x2 | x6 | x10 | x14
-
- vmov.i16 q10, #0 @ q10=[0000000000000000]
- vmov.i16 q11, #255 @ q11=[FFFFFFFFFFFFFFFF] (hex)
-
- vmov.i16 q0, #128 @ q0 = 128|128|128|128|128|128|128|128
-
- vqadd.s16 q8, q8, q0 @ Add the offset
- vqadd.s16 q9, q9, q0 @ Add the offset
-
- vmax.s16 q8, q8, q10 @ clamp > 0
- vmin.s16 q8, q8, q11 @ clamp < 255
-
- vmax.s16 q9, q9, q10 @ clamp > 0
- vmin.s16 q9, q9, q11 @ clamp < 255
-
- vst1.16 {d16}, [r1], r2 @ d16: x0 | x1 | x2 | x3 (LSB | MSB)
- vst1.16 {d17}, [r1], r2 @ d17: x4 | x5 | x6 | x7 (LSB | MSB)
- vst1.16 {d19}, [r1], r2 @ d18: x8 | x9 | x10 | x11 (LSB | MSB)
- vst1.16 {d18}, [r1], r2 @ d19: x12| x13 | x14 | x15 (LSB | MSB)
-
- bx lr @ Return to caller
-
- @ end of idct_4x4_venum
-
-@==========================================================================
-@ FUNCTION : idct_8x8_venum
-@--------------------------------------------------------------------------
-@ DISCRIPTION : VeNum optimization of one 8x8 block iDCT
-@--------------------------------------------------------------------------
-@ C PROTOTYPE : void idct_8x8_venum(int16 * input,
-@ int16 * output,
-@ int32 stride)
-@--------------------------------------------------------------------------
-@ REG INPUT : R0 pointer to input (int16)
-@ R1 pointer to output (int16)
-@ R2 block stride
-@--------------------------------------------------------------------------
-@ STACK ARG : None
-@--------------------------------------------------------------------------
-@ MEM INPUT : None
-@--------------------------------------------------------------------------
-@ REG OUTPUT : None
-@--------------------------------------------------------------------------
-@ MEM OUTPUT : None
-@--------------------------------------------------------------------------
-@ REG AFFECTED : R0 - R9
-@--------------------------------------------------------------------------
-@ STACK USAGE : none
-@--------------------------------------------------------------------------
-@ CYCLES : 177 cycles
-@--------------------------------------------------------------------------
-@ NOTES :
-@
-@ It was tested to be IEEE 1180 compliant. Since IEEE 1180 compliance is more stringent
-@ than MPEG-4 compliance, this version is also MPEG-4 compliant.
-@
-@ CODE STRUCTURE:
-@ (i) Macros for transposing an 8x8 matrix and for configuring the VFP unit are defined.
-@ (ii) Macro for IDCT in one dimension is defined as four stages
-@ (iii) The two dimensional code begins
-@ (iv) constants are defined in the area DataArea
-@
-@ PROGRAM FLOW:
-@
-@ The VFP is configured
-@ The parameters to IDCT are loaded
-@ the coefficients are loaded
-@ loop:
-@ decrement loop counter
-@ The first input Matrix is loaded and pre-scaled
-@ The input is prescaled using the constants
-@ IDCT is performed in one dimension on the 8 columns
-@ The matrix is transposed
-@ A bias is loaded an added to the matrix
-@ IDCT is performed in one dimension on the 8 rows
-@ The matrix is post-scaled
-@ The matrix is saved
-@ test loop counter and loop if greater than zero
-@ stop
-@
-@
-@ ARM REGISTER ALLOCATION
-@ ==========================================
-@ r0 : pointer to input data
-@ r1 : pointer to output are
-@ r2 : stride in the output buffer
-@ r3 :
-@ r4 :
-@ r5 : pointer to constants[0] [5]
-@ r6 : pointer to constants[1]
-@ r7 : pointer to constants[2]
-@ r8 : pointer to constants[3]
-@ r9 : pointer to constants[4]
-@ -------------------------------------------
-@
-@ VENUM REGISTER ALLOCATION
-@ =================================================
-@ q0 : constants[0]
-@ q1 : constants[1]
-@ q2 : constants[2], IDCT1D in-place scratch
-@ q3 : constants[3], IDCT1D in-place scratch
-@ q4 : constants[4], IDCT1D in-place scratch, and bias compensation
-@ q5 : IDCT1D in-place scratch
-@ q6 : IDCT1D in-place scratch
-@ q7 : IDCT1D in-place scratch
-@ q8 : Matrix[0] IDCT1D in-place scratch
-@ q9 : Matrix[1] IDCT1D in-place scratch
-@ q10 : Matrix[2] IDCT1D in-place scratch
-@ q11 : Matrix[3] IDCT1D in-place scratch
-@ q12 : Matrix[4] IDCT1D in-place scratch
-@ q13 : Matrix[5] IDCT1D in-place scratch
-@ q14 : Matrix[6] IDCT1D in-place scratch
-@ q15 : Matrix[7] IDCT1D in-place scratch
-@==========================================================================
-.type idct_8x8_venum, %function
-idct_8x8_venum:
-
- push {r5-r9}
- vpush {d8-d15}
- IDCT_ENTRY
- BIG_BODY_TRANSPOSE_INPUT
- vpop {d8-d15}
- pop {r5-r9}
- bx lr
- @ end of idct_8x8_venum
-
-@==========================================================================
-@ Constants Definition AREA: define idct kernel, bias
-@==========================================================================
- .section ro_data_area @ AREA RODataArea
- .data @ DATA, READONLY
- .align 5 @ ALIGN=5
-
-constants:
- .hword 23170, 13573, 6518, 21895, -23170, -21895, 8223, 8224
- .hword 16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725
- .hword 22725, 31521, 29692, 26722, 22725, 26722, 29692, 31521
- .hword 21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692
- .hword 19266, 26722, 25172, 22654, 19266, 22654, 25172, 26722
- .hword 0, 255, 0, 0
-
-coefficient: @ These are the coefficent used by 4x4 iDCT in Q15 format
- .hword 11585, 15137, 11585, 6270, 11585, 15137, 11585, 6270 @ C4, C2, C4, C6, C4, C2, C4, C6 /2
- .hword 11585, 6270, 11585, 15137, 11585, 6270, 11585, 15137 @ C4, C6, C4, C2, C4, C6, C4, C2 /2
- .hword 11585, 11585, 11585, 11585, 15137, 15137, 15137, 15137 @ C4, C4, C4, C4, C2, C2, C2, C2 /2
- .hword 11585, 11585, 11585, 11585, 6270, 6270, 6270, 6270 @ C4, C4, C4, C4, C6, C6, C6, C6 /2
-
-.end