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feat(mat4): add scale function

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This commit is contained in:
Loïc GUEZO
2025-07-06 11:01:33 +02:00
parent 86beae9efd
commit 8398c6e480
2 changed files with 32 additions and 2 deletions
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30
src/math/mat4.c
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@@ -134,6 +134,36 @@ Mat4f_t mat4_sub(const Mat4f_t* m1, const Mat4f_t* m2)
return mout;
}
Mat4f_t* mat4f_scale_r(Mat4f_t *out, float scalar)
{
for(int i = 0; i<MAT_SIZE; i+=4) {
#if defined (SIMD_X86)
__m128 ma = _mm_load_ps(&out->m[i]);
__m128 mb = _mm_set1_ps(scalar);
__m128 mres = _mm_mul_ps(ma, mb);
_mm_store_ps(&out->m[i], mres);
#elif defined (SIMD_ARCH)
float32x4_t ma = vld1q_f32(&out->m[i]);
float32x4_t mb = vdupq_n_f32(scalar);
float32x4_t mres = vmulq_f32(ma, mb);
vst1q_f32(&out->m[i], mres);
#else
for(int j = 0; j<4; j++) {
out->m[i+j] *= scalar;
}
#endif
}
return out;
}
Mat4f_t mat4f_scale(const Mat4f_t *__restrict m, float scalar)
{
Mat4f_t mout = mat4f_clone(m);
mat4f_scale_r(&mout, scalar);
return mout;
}
// Mat4_t mat4_scl(const Mat4_t* m, float scalar)
// {
// Mat4_t mat;

4
src/math/mat4.h
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@@ -26,8 +26,8 @@ Mat4f_t* mat4f_add_r(Mat4f_t* out, const Mat4f_t* m2);
Mat4f_t mat4f_sub(const Mat4f_t* m1, const Mat4f_t* m2);
Mat4f_t* mat4f_sub_r(Mat4f_t* out, const Mat4f_t* m2);
// Mat4_t mat4_sub(const Mat4_t* m1, const Mat4_t* m2);
Mat4f_t mat4f_scale(const Mat4f_t *__restrict m, float scalar);
Mat4f_t* mat4f_scale_r(Mat4f_t *out, float scalar);
// Mat4_t mat4_scl(const Mat4_t* m, float scalar);
// // row * col