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llvmpipe: manually unroll the inputs.step[] setup code 

Good for a few more fps in some tests.
This commit is contained in:
Brian Paul 2010-01-21 16:21:31 -07:00
parent e5829ccc2b
commit a904a7b990
1 changed files with 30 additions and 17 deletions
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47
src/gallium/drivers/llvmpipe/lp_setup_tri.c
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@ -362,31 +362,44 @@ do_triangle_ccw(struct setup_context *setup,
tri->ei2 = tri->dx23 - tri->dy23 - tri->eo2;
tri->ei3 = tri->dx31 - tri->dy31 - tri->eo3;
/* Fill in the inputs.step[][] arrays.
* We've manually unrolled some loops here.
*/
{
const int xstep1 = -tri->dy12;
const int xstep2 = -tri->dy23;
const int xstep3 = -tri->dy31;
const int ystep1 = tri->dx12;
const int ystep2 = tri->dx23;
const int ystep3 = tri->dx31;
int qx, qy, ix, iy;
int i = 0;
for (qy = 0; qy < 2; qy++) {
for (qx = 0; qx < 2; qx++) {
for (iy = 0; iy < 2; iy++) {
for (ix = 0; ix < 2; ix++, i++) {
int x = qx * 2 + ix;
int y = qy * 2 + iy;
tri->inputs.step[0][i] = x * xstep1 + y * ystep1;
tri->inputs.step[1][i] = x * xstep2 + y * ystep2;
tri->inputs.step[2][i] = x * xstep3 + y * ystep3;
}
}
}
}
#define SETUP_STEP(i, x, y) \
do { \
tri->inputs.step[0][i] = x * xstep1 + y * ystep1; \
tri->inputs.step[1][i] = x * xstep2 + y * ystep2; \
tri->inputs.step[2][i] = x * xstep3 + y * ystep3; \
} while (0)
SETUP_STEP(0, 0, 0);
SETUP_STEP(1, 1, 0);
SETUP_STEP(2, 0, 1);
SETUP_STEP(3, 1, 1);
SETUP_STEP(4, 2, 0);
SETUP_STEP(5, 3, 0);
SETUP_STEP(6, 2, 1);
SETUP_STEP(7, 3, 1);
SETUP_STEP(8, 0, 2);
SETUP_STEP(9, 1, 2);
SETUP_STEP(10, 0, 3);
SETUP_STEP(11, 1, 3);
SETUP_STEP(12, 2, 2);
SETUP_STEP(13, 3, 2);
SETUP_STEP(14, 2, 3);
SETUP_STEP(15, 3, 3);
#undef STEP
}
/*