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sse2 version of vec4 dot product

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* use this for normalizing vector
This commit is contained in:
Recep Aslantas
2018-04-08 18:27:54 +03:00
parent 932f638d5a
commit e4e0fa623c
7 changed files with 61 additions and 3 deletions
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9
include/cglm/vec4.h
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@@ -122,7 +122,14 @@ glm_vec4_copy(vec4 v, vec4 dest) {
CGLM_INLINE
float
glm_vec4_dot(vec4 a, vec4 b) {
#if defined( __SSE__ ) || defined( __SSE2__ )
__m128 x0;
x0 = _mm_mul_ps(_mm_load_ps(a), _mm_load_ps(b));
x0 = _mm_add_ps(x0, _mm_shuffle1_ps(x0, 1, 0, 3, 2));
return _mm_cvtss_f32(_mm_add_ss(x0, _mm_shuffle1_ps(x0, 0, 1, 0, 1)));
#else
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
#endif
}
/*!
@@ -139,7 +146,7 @@ glm_vec4_dot(vec4 a, vec4 b) {
CGLM_INLINE
float
glm_vec4_norm2(vec4 v) {
return v[0] * v[0] + v[1] * v[1] + v[2] * v[2] + v[3] * v[3];
return glm_vec_dot(v, v);
}
/*!