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cell: minor improvements to fragment code-gen

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This commit is contained in:
Brian Paul 2008-09-11 17:08:52 -06:00
parent 178bbaff80
commit bc304bbd49
1 changed files with 11 additions and 3 deletions
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14
src/gallium/drivers/cell/ppu/cell_gen_fragment.c
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@ -265,6 +265,8 @@ gen_blend(const struct pipe_blend_state *blend,
int one_reg = spe_allocate_available_register(f);
int tmp_reg = spe_allocate_available_register(f);
boolean one_reg_set = false; /* avoid setting one_reg more than once */
ASSERT(blend->blend_enable);
/* Unpack/convert framebuffer colors from four 32-bit packed colors
@ -275,7 +277,7 @@ gen_blend(const struct pipe_blend_state *blend,
int mask_reg = spe_allocate_available_register(f);
/* mask = {0x000000ff, 0x000000ff, 0x000000ff, 0x000000ff} */
spe_fsmbi(f, mask_reg, 0x1111);
spe_load_int(f, mask_reg, 0xff);
/* XXX there may be more clever ways to implement the following code */
switch (color_format) {
@ -418,7 +420,10 @@ gen_blend(const struct pipe_blend_state *blend,
break;
case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
/* one = {1.0, 1.0, 1.0, 1.0} */
spe_load_float(f, one_reg, 1.0f);
if (!one_reg_set) {
spe_load_float(f, one_reg, 1.0f);
one_reg_set = true;
}
/* tmp = one - fragA */
spe_fs(f, tmp_reg, one_reg, fragA_reg);
/* term = fb * tmp */
@ -446,7 +451,10 @@ gen_blend(const struct pipe_blend_state *blend,
break;
case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
/* one = {1.0, 1.0, 1.0, 1.0} */
spe_load_float(f, one_reg, 1.0f);
if (!one_reg_set) {
spe_load_float(f, one_reg, 1.0f);
one_reg_set = true;
}
/* tmp = one - fragA */
spe_fs(f, tmp_reg, one_reg, fragA_reg);
/* termA = fbA * tmp */