diff options
Diffstat (limited to 'libhsail-rt/rt/sat_arithmetic.c')
| -rw-r--r-- | libhsail-rt/rt/sat_arithmetic.c | 116 |
1 files changed, 42 insertions, 74 deletions
diff --git a/libhsail-rt/rt/sat_arithmetic.c b/libhsail-rt/rt/sat_arithmetic.c index 71d86af709f..274612aca91 100644 --- a/libhsail-rt/rt/sat_arithmetic.c +++ b/libhsail-rt/rt/sat_arithmetic.c @@ -49,21 +49,19 @@ __hsail_sat_add_u16 (uint16_t a, uint16_t b) uint32_t __hsail_sat_add_u32 (uint32_t a, uint32_t b) { - uint64_t c = (uint64_t) a + (uint64_t) b; - if (c > UINT32_MAX) + uint32_t c; + if (__builtin_add_overflow (a, b, &c)) return UINT32_MAX; - else - return c; + return c; } uint64_t __hsail_sat_add_u64 (uint64_t a, uint64_t b) { - __uint128_t c = (__uint128_t) a + (__uint128_t) b; - if (c > UINT64_MAX) + uint64_t c; + if (__builtin_add_overflow (a, b, &c)) return UINT64_MAX; - else - return c; + return c; } int8_t @@ -93,25 +91,19 @@ __hsail_sat_add_s16 (int16_t a, int16_t b) int32_t __hsail_sat_add_s32 (int32_t a, int32_t b) { - int64_t c = (int64_t) a + (int64_t) b; - if (c > INT32_MAX) - return INT32_MAX; - else if (c < INT32_MIN) - return INT32_MIN; - else - return c; + int32_t c; + if (__builtin_add_overflow (a, b, &c)) + return b < 0 ? INT32_MIN : INT32_MAX; + return c; } int64_t __hsail_sat_add_s64 (int64_t a, int64_t b) { - __int128_t c = (__int128_t) a + (__int128_t) b; - if (c > INT64_MAX) - return INT64_MAX; - else if (c < INT64_MIN) - return INT64_MIN; - else - return c; + int64_t c; + if (__builtin_add_overflow (a, b, &c)) + return b < 0 ? INT64_MIN : INT64_MAX; + return c; } uint8_t @@ -120,8 +112,6 @@ __hsail_sat_sub_u8 (uint8_t a, uint8_t b) int16_t c = (uint16_t) a - (uint16_t) b; if (c < 0) return 0; - else if (c > UINT8_MAX) - return UINT8_MAX; else return c; } @@ -132,8 +122,6 @@ __hsail_sat_sub_u16 (uint16_t a, uint16_t b) int32_t c = (uint32_t) a - (uint32_t) b; if (c < 0) return 0; - else if (c > UINT16_MAX) - return UINT16_MAX; else return c; } @@ -141,25 +129,19 @@ __hsail_sat_sub_u16 (uint16_t a, uint16_t b) uint32_t __hsail_sat_sub_u32 (uint32_t a, uint32_t b) { - int64_t c = (uint64_t) a - (uint64_t) b; - if (c < 0) + uint32_t c; + if (__builtin_sub_overflow (a, b, &c)) return 0; - else if (c > UINT32_MAX) - return UINT32_MAX; - else - return c; + return c; } uint64_t __hsail_sat_sub_u64 (uint64_t a, uint64_t b) { - __int128_t c = (__uint128_t) a - (__uint128_t) b; - if (c < 0) + uint64_t c; + if (__builtin_sub_overflow (a, b, &c)) return 0; - else if (c > UINT64_MAX) - return UINT64_MAX; - else - return c; + return c; } int8_t @@ -189,25 +171,19 @@ __hsail_sat_sub_s16 (int16_t a, int16_t b) int32_t __hsail_sat_sub_s32 (int32_t a, int32_t b) { - int64_t c = (int64_t) a - (int64_t) b; - if (c > INT32_MAX) - return INT32_MAX; - else if (c < INT32_MIN) - return INT32_MIN; - else - return c; + int32_t c; + if (__builtin_sub_overflow (a, b, &c)) + return b < 0 ? INT32_MAX : INT32_MIN; + return c; } int64_t __hsail_sat_sub_s64 (int64_t a, int64_t b) { - __int128_t c = (__int128_t) a - (__int128_t) b; - if (c > INT64_MAX) - return INT64_MAX; - else if (c < INT64_MIN) - return INT64_MIN; - else - return c; + int64_t c; + if (__builtin_sub_overflow (a, b, &c)) + return b < 0 ? INT64_MAX : INT64_MIN; + return c; } uint8_t @@ -233,21 +209,19 @@ __hsail_sat_mul_u16 (uint16_t a, uint16_t b) uint32_t __hsail_sat_mul_u32 (uint32_t a, uint32_t b) { - uint64_t c = (uint64_t) a * (uint64_t) b; - if (c > UINT32_MAX) + uint32_t c; + if (__builtin_mul_overflow (a, b, &c)) return UINT32_MAX; - else - return c; + return c; } uint64_t __hsail_sat_mul_u64 (uint64_t a, uint64_t b) { - __uint128_t c = (__uint128_t) a * (__uint128_t) b; - if (c > UINT64_MAX) + uint64_t c; + if (__builtin_mul_overflow (a, b, &c)) return UINT64_MAX; - else - return c; + return c; } int8_t @@ -277,23 +251,17 @@ __hsail_sat_mul_s16 (int16_t a, int16_t b) int32_t __hsail_sat_mul_s32 (int32_t a, int32_t b) { - int64_t c = (int64_t) a * (int64_t) b; - if (c > INT32_MAX) - return INT32_MAX; - else if (c < INT32_MIN) - return INT32_MIN; - else - return c; + int32_t c; + if (__builtin_mul_overflow (a, b, &c)) + return ((a > 0) ^ (b > 0)) ? INT32_MIN : INT32_MAX; + return c; } int64_t __hsail_sat_mul_s64 (int64_t a, int64_t b) { - __int128_t c = (__int128_t) a * (__int128_t) b; - if (c > INT64_MAX) - return INT64_MAX; - else if (c < INT64_MIN) - return INT64_MIN; - else - return c; + int64_t c; + if (__builtin_mul_overflow (a, b, &c)) + return ((a > 0) ^ (b > 0)) ? INT64_MIN : INT64_MAX; + return c; } |