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feat(mat4): add only x64 SSE mul

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This commit is contained in:
Loïc GUEZO
2025-07-11 09:28:26 +02:00
parent 8398c6e480
commit f4e4349877
2 changed files with 33 additions and 11 deletions
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38
src/math/mat4.c
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@@ -164,16 +164,38 @@ Mat4f_t mat4f_scale(const Mat4f_t *__restrict m, float scalar)
return mout;
}
// Mat4_t mat4_scl(const Mat4_t* m, float scalar)
// {
// Mat4_t mat;
Mat4f_t* mat4_mul_r(Mat4f_t* out, const Mat4f_t* m2)
{
Mat4f_t clone = mat4f_clone(out);
// for(int i = 0; i<16; i++) {
// mat.m[i] = m->m[i] * scalar;
// }
for (int row = 0; row<4; row++) {
#if defined (SIMD_X86)
__m128 mrow = _mm_load_ps(&clone.m[row * 4]);
// return mat;
// }
for (int col = 0; col<4; col++) {
__m128 mcol = _mm_set_ps(
m2->m[3 * 4 + col],
m2->m[2 * 4 + col],
m2->m[1 * 4 + col],
m2->m[0 * 4 + col]
);
__m128 mmul = _mm_mul_ps(mrow, mcol);
__m128 shuf = _mm_shuffle_ps(mmul, mmul, _MM_SHUFFLE(2, 3, 0, 1)); // [y, y, w, w]
__m128 sum = _mm_add_ps(mmul, shuf); // [x+y, y+y, z+w, w+w]
shuf = _mm_movehl_ps(shuf, sum); // [z+w, w+w, w, w]
sum = _mm_add_ss(sum, shuf); // [x+y+z+w, y+y, z+w, w+w]
float mres = _mm_cvtss_f32(sum);
out->m[row * 4 + col] = mres;
}
#elif defined (SIMD_ARCH)
#else
#endif
}
return out;
}
// Mat4_t mat4_mul(const Mat4_t* m1, const Mat4_t* m2)
// {

6
src/math/mat4.h
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@@ -28,10 +28,10 @@ Mat4f_t* mat4f_sub_r(Mat4f_t* out, const Mat4f_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
// Mat4_t mat4_mul(const Mat4_t* m1, const Mat4_t* m2);
// row * col
Mat4f_t mat4_mul(const Mat4f_t* m1, const Mat4f_t* m2);
Mat4f_t* mat4_mul_r(Mat4f_t* out, const Mat4f_t* m2);
// Mat4_t mat4_tpo(const Mat4_t* m);