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Diffstat (limited to 'private/crt32/string/mips/wcscmpm.s')
| -rw-r--r-- | private/crt32/string/mips/wcscmpm.s | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/private/crt32/string/mips/wcscmpm.s b/private/crt32/string/mips/wcscmpm.s new file mode 100644 index 000000000..d3997945d --- /dev/null +++ b/private/crt32/string/mips/wcscmpm.s @@ -0,0 +1,67 @@ +/******************************************************************************* + * wcscmpm.s - contains wcscmp() + * + * ------------------------------------------------------------------ + * | Copyright Unpublished, MIPS Computer Systems, Inc. All Rights | + * | Reserved. This software contains proprietary and confidential | + * | information of MIPS and its suppliers. Use, disclosure or | + * | reproduction is prohibited without the prior express written | + * | consent of MIPS. | + * ------------------------------------------------------------------ + * strcmp.s 1.1 + * + * Purpose: + * wcscmp() compares two wide-character strings and returns an integer + * to indicate whether the first is less than the second, the two are + * equal, or whether the first is greater than the second. + * + * Comparison is done wchar_t by wchar_t on an UNSIGNED basis, which is to + * say that Null wchar_t(0) is less than any other character. + * + * This function is a MIPS assembly-code replacement for the C version. + * + * Entry: + * + * const wchar_t * src - string for left-hand side of comparison + * const wchar_t * dst - string for right-hand side of comparison + * + *Exit: + * returns -1 if src < dst + * returns 0 if src == dst + * returns +1 if src > dst + * + *Exceptions: + * + *Revision History: + * Craig Hansen (MIPS) 06-June-86 Created. + * Roger Lanser (MS) 02-April-94 Cloned for Wide Characters (16-bits). + * + ******************************************************************************/ + +#include <kxmips.h> + + .text + +LEAF_ENTRY(wcscmp) + + lhu t0,0(a0) +1: lhu t1,0(a1) + addi a0,4 + beq t0,0,2f + lhu t2,-2(a0) # ok to load since -4(a0)!=0 + bne t0,t1,2f + lhu t1,2(a1) + addi a1,4 + beq t2,0,2f + lhu t0,0(a0) # ok to load since -2(a0) != 0 + beq t2,t1,1b + move v0,zero + j ra // source1 == source2, return 0 +2: + sltu v0,t1,t0 // compare source1 to source2 + beq v0,zero,3f + j ra // source1 > source2, return 1 +3: + li v0,-1 + j ra // source1 < source2, return 1 + .end wcscmp |