diff options
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 99407b8ace..2c80dd712e 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -623,6 +623,7 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term2B_reg, fbB_reg, fragA_reg); break; case PIPE_BLENDFACTOR_INV_SRC_ALPHA: +#if 0 /* one = {1.0, 1.0, 1.0, 1.0} */ if (!one_reg_set) { one_reg = spe_allocate_available_register(f); @@ -635,6 +636,15 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term2R_reg, fbR_reg, tmp_reg); spe_fm(f, term2G_reg, fbG_reg, tmp_reg); spe_fm(f, term2B_reg, fbB_reg, tmp_reg); +#else + /* Compute: term2x = fbx * (1.0 - fragA) + * Which is: term2x = fbx - fbx * fragA + * Use fnms t,a,b,c which computes t=c-a*b + */ + spe_fnms(f, term2R_reg, fbR_reg, fragA_reg, fbR_reg); + spe_fnms(f, term2G_reg, fbG_reg, fragA_reg, fbG_reg); + spe_fnms(f, term2B_reg, fbB_reg, fragA_reg, fbB_reg); +#endif break; /* XXX more cases */ // GL_ONE_MINUS_SRC_COLOR @@ -663,6 +673,7 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term2A_reg, fbA_reg, fragA_reg); break; case PIPE_BLENDFACTOR_INV_SRC_ALPHA: +#if 0 /* one = {1.0, 1.0, 1.0, 1.0} */ if (!one_reg_set) { one_reg = spe_allocate_available_register(f); @@ -673,6 +684,13 @@ gen_blend(const struct pipe_blend_state *blend, spe_fs(f, tmp_reg, one_reg, fragA_reg); /* termA = fbA * tmp */ spe_fm(f, term2A_reg, fbA_reg, tmp_reg); +#else + /* Compute: term2A = fbA * (1.0 - fragA) + * Which is: term2A = fbA - fbA * fragA + * Use fnms t,a,b,c which computes t=c-a*b + */ + spe_fnms(f, term2A_reg, fbA_reg, fragA_reg, fbA_reg); +#endif break; /* XXX more cases */ // GL_ONE_MINUS_SRC_COLOR |