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Improve implementations of unsigned <=, >= in sse4 intrinsics file.

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This commit is contained in:
Matt Pharr
2012-01-27 16:49:41 -08:00
parent 12dc3f5c28
commit bba02f87ea
1 changed files with 4 additions and 8 deletions
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12
examples/intrinsics/sse4.h
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@@ -941,10 +941,8 @@ static FORCEINLINE __vec4_i1 __not_equal(__vec4_i32 a, __vec4_i32 b) {
}
static FORCEINLINE __vec4_i1 __unsigned_less_equal(__vec4_i32 a, __vec4_i32 b) {
a.v = _mm_xor_si128(a.v, _mm_set1_epi32(0x80000000));
b.v = _mm_xor_si128(b.v, _mm_set1_epi32(0x80000000));
return _mm_or_si128(_mm_cmplt_epi32(a.v, b.v),
_mm_cmpeq_epi32(a.v, b.v));
// a<=b == (min(a,b) == a)
return _mm_cmpeq_epi32(_mm_min_epu32(a.v, b.v), a.v);
}
static FORCEINLINE __vec4_i1 __signed_less_equal(__vec4_i32 a, __vec4_i32 b) {
@@ -953,10 +951,8 @@ static FORCEINLINE __vec4_i1 __signed_less_equal(__vec4_i32 a, __vec4_i32 b) {
}
static FORCEINLINE __vec4_i1 __unsigned_greater_equal(__vec4_i32 a, __vec4_i32 b) {
a.v = _mm_xor_si128(a.v, _mm_set1_epi32(0x80000000));
b.v = _mm_xor_si128(b.v, _mm_set1_epi32(0x80000000));
return _mm_or_si128(_mm_cmpgt_epi32(a.v, b.v),
_mm_cmpeq_epi32(a.v, b.v));
// a>=b == (max(a,b) == a)
return _mm_cmpeq_epi32(_mm_max_epu32(a.v, b.v), a.v);
}
static FORCEINLINE __vec4_i1 __signed_greater_equal(__vec4_i32 a, __vec4_i32 b) {