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vec4: optimize vec4 norm and norm2

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This commit is contained in:
Recep Aslantas
2018-04-13 11:18:42 +03:00
parent 0eb37da8bb
commit 79f8b1ebf8
4 changed files with 42 additions and 2 deletions
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16
include/cglm/vec4.h
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@@ -146,7 +146,15 @@ glm_vec4_dot(vec4 a, vec4 b) {
CGLM_INLINE
float
glm_vec4_norm2(vec4 v) {
return glm_vec4_dot(v, v);
#if defined( __SSE__ ) || defined( __SSE2__ )
__m128 x0;
x0 = _mm_load_ps(v);
x0 = _mm_mul_ps(x0, x0);
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
}
/*!
@@ -159,7 +167,13 @@ glm_vec4_norm2(vec4 v) {
CGLM_INLINE
float
glm_vec4_norm(vec4 vec) {
#if defined( __SSE__ ) || defined( __SSE2__ )
__m128 x0;
x0 = _mm_load_ps(vec);
return _mm_cvtss_f32(_mm_sqrt_ss(glm_simd_dot(x0, x0)));
#else
return sqrtf(glm_vec4_norm2(vec));
#endif
}
/*!