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squared distance with SIMD support (#96)

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squared distance for vec4
This commit is contained in:
Luigi Castelli
2019-08-23 09:32:54 +02:00
committed by Recep Aslantas
parent d03d4b8df5
commit 43b36f1dc1
9 changed files with 87 additions and 28 deletions
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33
include/cglm/vec4.h
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@@ -43,6 +43,7 @@
CGLM_INLINE void glm_vec4_normalize(vec4 v);
CGLM_INLINE void glm_vec4_normalize_to(vec4 vec, vec4 dest);
CGLM_INLINE float glm_vec4_distance(vec4 a, vec4 b);
CGLM_INLINE float glm_vec4_distance2(vec4 a, vec4 b);
CGLM_INLINE void glm_vec4_maxv(vec4 a, vec4 b, vec4 dest);
CGLM_INLINE void glm_vec4_minv(vec4 a, vec4 b, vec4 dest);
CGLM_INLINE void glm_vec4_clamp(vec4 v, float minVal, float maxVal);
@@ -697,14 +698,36 @@ CGLM_INLINE
float
glm_vec4_distance(vec4 a, vec4 b) {
#if defined( __SSE__ ) || defined( __SSE2__ )
return glmm_norm(_mm_sub_ps(glmm_load(b), glmm_load(a)));
return glmm_norm(_mm_sub_ps(glmm_load(a), glmm_load(b)));
#elif defined(CGLM_NEON_FP)
return glmm_norm(vsubq_f32(glmm_load(a), glmm_load(b)));
#else
return sqrtf(glm_pow2(b[0] - a[0])
+ glm_pow2(b[1] - a[1])
+ glm_pow2(b[2] - a[2])
+ glm_pow2(b[3] - a[3]));
return sqrtf(glm_pow2(a[0] - b[0])
+ glm_pow2(a[1] - b[1])
+ glm_pow2(a[2] - b[2])
+ glm_pow2(a[3] - b[3]));
#endif
}
/**
* @brief squared distance between two vectors
*
* @param[in] a vector1
* @param[in] b vector2
* @return returns squared distance
*/
CGLM_INLINE
float
glm_vec4_distance2(vec4 a, vec4 b) {
#if defined( __SSE__ ) || defined( __SSE2__ )
return glmm_norm2(_mm_sub_ps(glmm_load(a), glmm_load(b)));
#elif defined(CGLM_NEON_FP)
return glmm_norm2(vsubq_f32(glmm_load(a), glmm_load(b)));
#else
return glm_pow2(a[0] - b[0])
+ glm_pow2(a[1] - b[1])
+ glm_pow2(a[2] - b[2])
+ glm_pow2(a[3] - b[3]);
#endif
}