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Optimize out a bunch of sqrtf

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This commit is contained in:
Arceveti
2021-09-28 22:43:29 -07:00
parent 28e8d99707
commit 8e398008d8
60 changed files with 332 additions and 535 deletions
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26
src/engine/math_util.c
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@@ -12,6 +12,10 @@
#include "config.h"
// unused Mtx(s)
s16 identityMtx[4][4] = { { 1, 0, 0, 0 }, { 0, 1, 0, 0 }, { 0, 0, 1, 0 }, { 0, 0, 0, 1 } };
s16 zeroMtx[4][4] = { { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } };
Vec3f gVec3fX = { 1.0f, 0.0f, 0.0f };
Vec3f gVec3fY = { 0.0f, 1.0f, 0.0f };
Vec3f gVec3fZ = { 0.0f, 0.0f, 1.0f };
@@ -40,11 +44,7 @@ static inline s32 roundf(f32 in) {
// }
f32 absf(f32 x) {
if (x >= 0) {
return x;
} else {
return -x;
}
return ABSF(x);
}
/// Returns the lowest of three values.
@@ -543,7 +543,7 @@ void mtxf_mul_vec3s(Mat4 mtx, Vec3s b) {
register s32 i;
register s16 *c = b;
for (i = 0; i < 3; i++) {
c[0] = x * temp2[0] + y * temp2[4] + z * temp2[8] + temp2[12];
c[0] = (x * temp2[0]) + (y * temp2[4]) + (z * temp2[8]) + temp2[12];
c++;
temp2++;
}
@@ -566,13 +566,13 @@ void mtxf_mul_vec3s(Mat4 mtx, Vec3s b) {
void mtxf_to_mtx_scale(Mtx *dest, Mat4 src) {
Mat4 temp;
register s32 i, j;
for( i = 0; i < 4; i++ ) {
for( j = 0; j < 3; j++ ) {
temp[i][j] = src[i][j] / gWorldScale;
for(i = 0; i < 4; i++) {
for(j = 0; j < 3; j++) {
temp[i][j] = (src[i][j] / gWorldScale);
}
temp[i][3] = src[i][3];
}
guMtxF2L( temp, dest );
guMtxF2L(temp, dest);
}
void mtxf_to_mtx_constant(register s16 *dest, register f32 *src) {
@@ -580,7 +580,7 @@ void mtxf_to_mtx_constant(register s16 *dest, register f32 *src) {
s32 i;
for (i = 0; i < 16; i++) {
asFixedPoint = (src[i] * (1 << 16));
dest[i] = (asFixedPoint >> 16);
dest[i ] = (asFixedPoint >> 16);
dest[i + 16] = (asFixedPoint & 0xFFFF);
}
}
@@ -660,7 +660,7 @@ void vec3f_get_lateral_dist(Vec3f from, Vec3f to, f32 *lateralDist) {
*lateralDist = sqrtf(sqr(dx) + sqr(dz));
}
/// Finds the squared horizontal distance between two vectors.
/// Finds the squared horizontal distance between two vectors. Avoids a sqrtf call.
void vec3f_get_lateral_dist_squared(Vec3f from, Vec3f to, f32 *lateralDist) {
register f32 dx = (to[0] - from[0]);
register f32 dz = (to[2] - from[2]);
@@ -674,7 +674,7 @@ void vec3f_get_dist(Vec3f from, Vec3f to, f32 *dist) {
*dist = vec3_mag(d);
}
/// Finds the squared distance between two vectors.
/// Finds the squared distance between two vectors. Avoids a sqrtf call.
void vec3f_get_dist_squared(Vec3f from, Vec3f to, f32 *dist) {
register Vec3f d;
vec3_diff(d, to, from);