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Fixed SIMD trunc implementation

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This commit is contained in:
Christophe Riccio 2011-05-22 11:59:02 +01:00
parent 0e9ad7b6a5
commit 3473acdc2a
1 changed files with 3 additions and 1 deletions
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4
glm/gtx/simd_vec4.inl
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@ -314,6 +314,8 @@ namespace glm
detail::fvec4SIMD const & x detail::fvec4SIMD const & x
) )
{ {
//return x < 0 ? -floor(-x) : floor(x);
__m128 Flr0 = detail::sse_flr_ps(_mm_sub_ps(_mm_setzero_ps(), x.Data)); __m128 Flr0 = detail::sse_flr_ps(_mm_sub_ps(_mm_setzero_ps(), x.Data));
__m128 Sub0 = _mm_sub_ps(Flr0, x.Data); __m128 Sub0 = _mm_sub_ps(Flr0, x.Data);
__m128 Flr1 = detail::sse_flr_ps(x.Data); __m128 Flr1 = detail::sse_flr_ps(x.Data);
@ -321,7 +323,7 @@ namespace glm
__m128 Cmp0 = _mm_cmplt_ps(x.Data, glm::detail::zero); __m128 Cmp0 = _mm_cmplt_ps(x.Data, glm::detail::zero);
__m128 Cmp1 = _mm_cmpnlt_ps(x.Data, glm::detail::zero); __m128 Cmp1 = _mm_cmpnlt_ps(x.Data, glm::detail::zero);
__m128 And0 = _mm_and_ps(Flr0, Cmp0); __m128 And0 = _mm_and_ps(Sub0, Cmp0);
__m128 And1 = _mm_and_ps(Flr1, Cmp1); __m128 And1 = _mm_and_ps(Flr1, Cmp1);
return _mm_or_ps(And0, And1); return _mm_or_ps(And0, And1);