diff options
Diffstat (limited to 'compare258.c')
| -rw-r--r-- | compare258.c | 62 |
1 files changed, 36 insertions, 26 deletions
diff --git a/compare258.c b/compare258.c index 7763bb6..76d0627 100644 --- a/compare258.c +++ b/compare258.c @@ -10,25 +10,36 @@ /* ALIGNED, byte comparison */ static inline int32_t compare256_c_static(const unsigned char *src0, const unsigned char *src1) { - const unsigned char *src0start = src0; - const unsigned char *src0end = src0 + 256; + int32_t len = 0; do { if (*src0 != *src1) - break; - src0 += 1, src1 += 1; + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; + if (*src0 != *src1) + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; + if (*src0 != *src1) + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; + if (*src0 != *src1) + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; if (*src0 != *src1) - break; - src0 += 1, src1 += 1; + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; if (*src0 != *src1) - break; - src0 += 1, src1 += 1; + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; if (*src0 != *src1) - break; - src0 += 1, src1 += 1; - } while (src0 < src0end); + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; + if (*src0 != *src1) + return len + (*src0 == *src1); + src0 += 1, src1 += 1, len += 1; + } while (len < 256); - return (int32_t)(src0 - src0start); + return 256; } static inline int32_t compare258_c_static(const unsigned char *src0, const unsigned char *src1) { @@ -55,25 +66,24 @@ int32_t compare258_c(const unsigned char *src0, const unsigned char *src1) { #ifdef UNALIGNED_OK /* UNALIGNED_OK, 16-bit integer comparison */ static inline int32_t compare256_unaligned_16_static(const unsigned char *src0, const unsigned char *src1) { - const unsigned char *src0start = src0; - const unsigned char *src0end = src0 + 256; + int32_t len = 0; do { if (*(uint16_t *)src0 != *(uint16_t *)src1) - break; - src0 += 2, src1 += 2; + return len + (*src0 == *src1); + src0 += 2, src1 += 2, len += 2; if (*(uint16_t *)src0 != *(uint16_t *)src1) - break; - src0 += 2, src1 += 2; + return len + (*src0 == *src1); + src0 += 2, src1 += 2, len += 2; if (*(uint16_t *)src0 != *(uint16_t *)src1) - break; - src0 += 2, src1 += 2; + return len + (*src0 == *src1); + src0 += 2, src1 += 2, len += 2; if (*(uint16_t *)src0 != *(uint16_t *)src1) - break; - src0 += 2, src1 += 2; - } while (src0 < src0end); + return len + (*src0 == *src1); + src0 += 2, src1 += 2, len += 2; + } while (len < 256); - return (int32_t)(src0 - src0start) + (src0 < src0end && *src0 == *src1); + return 256; } static inline int32_t compare258_unaligned_16_static(const unsigned char *src0, const unsigned char *src1) { @@ -111,7 +121,7 @@ static inline int32_t compare256_unaligned_32_static(const unsigned char *src0, src0 += 4, src1 += 4, len += 4; } while (len < 256); - return len; + return 256; } static inline int32_t compare258_unaligned_32_static(const unsigned char *src0, const unsigned char *src1) { @@ -151,7 +161,7 @@ static inline int32_t compare256_unaligned_64_static(const unsigned char *src0, src0 += 8, src1 += 8, len += 8; } while (len < 256); - return len; + return 256; } static inline int32_t compare258_unaligned_64_static(const unsigned char *src0, const unsigned char *src1) { |