diff options
Diffstat (limited to 'src/core/arm')
| -rw-r--r-- | src/core/arm/dyncom/arm_dyncom_interpreter.cpp | 109 |
1 files changed, 102 insertions, 7 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp index 84b4a38f0..b6b94b7a8 100644 --- a/src/core/arm/dyncom/arm_dyncom_interpreter.cpp +++ b/src/core/arm/dyncom/arm_dyncom_interpreter.cpp @@ -1019,6 +1019,15 @@ typedef struct _arm_inst { char component[0]; } arm_inst; +typedef struct generic_arm_inst { + u32 Ra; + u32 Rm; + u32 Rn; + u32 Rd; + u8 op1; + u8 op2; +} generic_arm_inst; + typedef struct _adc_inst { unsigned int I; unsigned int S; @@ -2469,9 +2478,29 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(rsc)(unsigned int inst, int index) } return inst_base; } -ARM_INST_PTR INTERPRETER_TRANSLATE(sadd16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SADD16"); } ARM_INST_PTR INTERPRETER_TRANSLATE(sadd8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SADD8"); } -ARM_INST_PTR INTERPRETER_TRANSLATE(saddsubx)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SADDSUBX"); } +ARM_INST_PTR INTERPRETER_TRANSLATE(sadd16)(unsigned int inst, int index) +{ + arm_inst* const inst_base = (arm_inst*)AllocBuffer(sizeof(arm_inst) + sizeof(generic_arm_inst)); + generic_arm_inst* const inst_cream = (generic_arm_inst*)inst_base->component; + + inst_base->cond = BITS(inst, 28, 31); + inst_base->idx = index; + inst_base->br = NON_BRANCH; + inst_base->load_r15 = 0; + + inst_cream->Rm = BITS(inst, 0, 3); + inst_cream->Rn = BITS(inst, 16, 19); + inst_cream->Rd = BITS(inst, 12, 15); + inst_cream->op1 = BITS(inst, 20, 21); + inst_cream->op2 = BITS(inst, 5, 7); + + return inst_base; +} +ARM_INST_PTR INTERPRETER_TRANSLATE(saddsubx)(unsigned int inst, int index) +{ + return INTERPRETER_TRANSLATE(sadd16)(inst, index); +} ARM_INST_PTR INTERPRETER_TRANSLATE(sbc)(unsigned int inst, int index) { arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(sbc_inst)); @@ -2637,9 +2666,15 @@ ARM_INST_PTR INTERPRETER_TRANSLATE(smusd)(unsigned int inst, int index) { UNI ARM_INST_PTR INTERPRETER_TRANSLATE(srs)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SRS"); } ARM_INST_PTR INTERPRETER_TRANSLATE(ssat)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSAT"); } ARM_INST_PTR INTERPRETER_TRANSLATE(ssat16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSAT16"); } -ARM_INST_PTR INTERPRETER_TRANSLATE(ssub16)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSUB16"); } ARM_INST_PTR INTERPRETER_TRANSLATE(ssub8)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSUB8"); } -ARM_INST_PTR INTERPRETER_TRANSLATE(ssubaddx)(unsigned int inst, int index) { UNIMPLEMENTED_INSTRUCTION("SSUBADDX"); } +ARM_INST_PTR INTERPRETER_TRANSLATE(ssub16)(unsigned int inst, int index) +{ + return INTERPRETER_TRANSLATE(sadd16)(inst, index); +} +ARM_INST_PTR INTERPRETER_TRANSLATE(ssubaddx)(unsigned int inst, int index) +{ + return INTERPRETER_TRANSLATE(sadd16)(inst, index); +} ARM_INST_PTR INTERPRETER_TRANSLATE(stc)(unsigned int inst, int index) { arm_inst *inst_base = (arm_inst *)AllocBuffer(sizeof(arm_inst) + sizeof(stc_inst)); @@ -5626,9 +5661,71 @@ unsigned InterpreterMainLoop(ARMul_State* state) FETCH_INST; GOTO_NEXT_INST; } - SADD16_INST: SADD8_INST: + + SADD16_INST: SADDSUBX_INST: + SSUBADDX_INST: + SSUB16_INST: + { + INC_ICOUNTER; + if (inst_base->cond == 0xE || CondPassed(cpu, inst_base->cond)) { + generic_arm_inst* const inst_cream = (generic_arm_inst*)inst_base->component; + + const s16 rn_lo = (RN & 0xFFFF); + const s16 rn_hi = ((RN >> 16) & 0xFFFF); + const s16 rm_lo = (RM & 0xFFFF); + const s16 rm_hi = ((RM >> 16) & 0xFFFF); + + s32 lo_result = 0; + s32 hi_result = 0; + + // SADD16 + if (inst_cream->op2 == 0x00) { + lo_result = (rn_lo + rm_lo); + hi_result = (rn_hi + rm_hi); + } + // SASX + else if (inst_cream->op2 == 0x01) { + lo_result = (rn_lo - rm_hi); + hi_result = (rn_hi + rm_lo); + } + // SSAX + else if (inst_cream->op2 == 0x02) { + lo_result = (rn_lo + rm_hi); + hi_result = (rn_hi - rm_lo); + } + // SSUB16 + else if (inst_cream->op2 == 0x03) { + lo_result = (rn_lo - rm_lo); + hi_result = (rn_hi - rm_hi); + } + + RD = (lo_result & 0xFFFF) | ((hi_result & 0xFFFF) << 16); + + if (lo_result >= 0) { + cpu->Cpsr |= (1 << 16); + cpu->Cpsr |= (1 << 17); + } else { + cpu->Cpsr &= ~(1 << 16); + cpu->Cpsr &= ~(1 << 17); + } + + if (hi_result >= 0) { + cpu->Cpsr |= (1 << 18); + cpu->Cpsr |= (1 << 19); + } else { + cpu->Cpsr &= ~(1 << 18); + cpu->Cpsr &= ~(1 << 19); + } + } + + cpu->Reg[15] += GET_INST_SIZE(cpu); + INC_PC(sizeof(generic_arm_inst)); + FETCH_INST; + GOTO_NEXT_INST; + } + SBC_INST: { INC_ICOUNTER; @@ -5851,9 +5948,7 @@ unsigned InterpreterMainLoop(ARMul_State* state) SRS_INST: SSAT_INST: SSAT16_INST: - SSUB16_INST: SSUB8_INST: - SSUBADDX_INST: STC_INST: { INC_ICOUNTER; |