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matrix determinant sse2

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Recep Aslantas
2016-09-17 12:19:15 +03:00
parent 6b017b14b3
commit ab58ae76eb
2 changed files with 53 additions and 18 deletions
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35
include/cglm-mat.h
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@@ -146,33 +146,32 @@ glm_mat4_scale(mat4 m, float s) {
CGLM_INLINE
float
glm_mat4_det(mat4 mat) {
#if defined( __SSE__ ) || defined( __SSE2__ )
return glm_mat4_det_sse2(mat);
#else
float t[6];
float a, b, c, d,
e, f, g, h,
i, j, k, l,
m, n, o, p
;
float kp_ol, jp_nl, jo_nk,
jp_ml, io_mk, in_mj;
m, n, o, p;
a = mat[0][0], b = mat[1][0], c = mat[2][0], d = mat[3][0],
e = mat[0][1], f = mat[1][1], g = mat[2][1], h = mat[3][1],
i = mat[0][2], j = mat[1][2], k = mat[2][2], l = mat[3][2],
m = mat[0][3], n = mat[1][3], o = mat[2][3], p = mat[3][3]
;
m = mat[0][3], n = mat[1][3], o = mat[2][3], p = mat[3][3];
kp_ol = k * p - o * l;
jp_nl = j * p - n * l;
jo_nk = j * o - n * k;
jp_ml = i * p - m * l;
io_mk = i * o - m * k;
in_mj = i * n - m * j;
t[0] = k * p - o * l;
t[1] = j * p - n * l;
t[2] = j * o - n * k;
t[3] = i * p - m * l;
t[4] = i * o - m * k;
t[5] = i * n - m * j;
return a * (f * kp_ol - g * jp_nl + h * jo_nk)
- b * (e * kp_ol - g * jp_ml + h * io_mk)
+ c * (e * jp_nl - f * jp_ml + h * in_mj)
- d * (e * jo_nk - f * io_mk + g * in_mj)
;
return a * (f * t[0] - g * t[1] + h * t[2])
- b * (e * t[0] - g * t[3] + h * t[4])
+ c * (e * t[1] - f * t[3] + h * t[5])
- d * (e * t[2] - f * t[4] + g * t[5]);
#endif
}
CGLM_INLINE