YourWishes/cglm
1
0
Fork 0
mirror of https://github.com/recp/cglm.git synced 2026-02-17 03:39:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

vec: some useful functions (#103)

Browse Source 
These functions are added:
- abs(): absolute value
- fract(): fractional part
- norm_one(): L1 norm
- norm_inf(): infinity norm
- hadd(): horizontal add
- hmax(): horizontal max
This commit is contained in:
Luigi Castelli
2019-08-31 23:30:15 +02:00
committed by Recep Aslantas
parent 6af1f5af04
commit 27cc9c3351
14 changed files with 552 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
include/cglm/vec4-ext.h
View File

@@ -24,6 +24,9 @@
CGLM_INLINE bool glm_vec4_isinf(vec4 v);
CGLM_INLINE bool glm_vec4_isvalid(vec4 v);
CGLM_INLINE void glm_vec4_sign(vec4 v, vec4 dest);
CGLM_INLINE void glm_vec4_abs(vec4 v, vec4 dest);
CGLM_INLINE void glm_vec4_fract(vec4 v, vec4 dest);
CGLM_INLINE float glm_vec4_hadd(vec4 v);
CGLM_INLINE void glm_vec4_sqrt(vec4 v, vec4 dest);
*/
@@ -237,6 +240,59 @@ glm_vec4_sign(vec4 v, vec4 dest) {
#endif
}
/*!
* @brief absolute value of each vector item
*
* @param[in] v vector
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec4_abs(vec4 v, vec4 dest) {
#if defined( __SSE__ ) || defined( __SSE2__ )
glmm_store(dest, glmm_abs(glmm_load(v)));
#elif defined(CGLM_NEON_FP)
vst1q_f32(dest, vabsq_f32(vld1q_f32(a)));
#else
dest[0] = fabsf(v[0]);
dest[1] = fabsf(v[1]);
dest[2] = fabsf(v[2]);
dest[3] = fabsf(v[3]);
#endif
}
/*!
* @brief fractional part of each vector item
*
* @param[in] v vector
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec4_fract(vec4 v, vec4 dest) {
dest[0] = fminf(v[0] - floorf(v[0]), 0x1.fffffep-1f);
dest[1] = fminf(v[1] - floorf(v[1]), 0x1.fffffep-1f);
dest[2] = fminf(v[2] - floorf(v[2]), 0x1.fffffep-1f);
dest[3] = fminf(v[3] - floorf(v[3]), 0x1.fffffep-1f);
}
/*!
* @brief vector reduction by summation
* @warning could overflow
*
* @param[in] v vector
* @return sum of all vector's elements
*/
CGLM_INLINE
float
glm_vec4_hadd(vec4 v) {
#if defined( __SSE__ ) || defined( __SSE2__ )
return glmm_hadd(glmm_load(v));
#else
return v[0] + v[1] + v[2] + v[3];
#endif
}
/*!
* @brief square root of each vector item
*