diff options
Diffstat (limited to 'src/gallium/drivers/cell/ppu')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 4e1e53ecdc..8e4dd82404 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -1282,7 +1282,7 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, /* Add Word Immediate computes rT = rA + 10-bit signed immediate */ spe_ai(f, newS_reg, fbS_reg, 1); /* Select from the current value or the new value based on the equality test */ - spe_selb(f, newS_reg, fbS_reg, newS_reg, equals_reg); + spe_selb(f, newS_reg, newS_reg, fbS_reg, equals_reg); spe_release_register(f, equals_reg); break; @@ -1295,7 +1295,7 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, /* Add Word Immediate with a (-1) value works */ spe_ai(f, newS_reg, fbS_reg, -1); /* Select from the current value or the new value based on the equality test */ - spe_selb(f, newS_reg, fbS_reg, newS_reg, equals_reg); + spe_selb(f, newS_reg, newS_reg, fbS_reg, equals_reg); spe_release_register(f, equals_reg); break; @@ -1534,15 +1534,28 @@ gen_stencil_depth_test(struct spe_function *f, * meaning that we have to calculate the stencil values but do not * need to mask them), we can avoid generating code. Don't forget * that we need to consider backfacing stencil, if enabled. + * + * Note that if the backface stencil is *not* enabled, the backface + * stencil will have the same values as the frontface stencil. */ - if (dsa->stencil[0].write_mask == 0x0 && (!dsa->stencil[1].enabled || dsa->stencil[1].write_mask == 0x00)) { - /* Trivial: don't need to calculate stencil values, and don't need to - * write them back to the framebuffer. + if (dsa->stencil[0].fail_op == PIPE_STENCIL_OP_KEEP && + dsa->stencil[0].zfail_op == PIPE_STENCIL_OP_KEEP && + dsa->stencil[0].zpass_op == PIPE_STENCIL_OP_KEEP && + dsa->stencil[1].fail_op == PIPE_STENCIL_OP_KEEP && + dsa->stencil[1].zfail_op == PIPE_STENCIL_OP_KEEP && + dsa->stencil[1].zpass_op == PIPE_STENCIL_OP_KEEP) { + /* No changes to any stencil values */ + need_to_calculate_stencil_values = false; + need_to_writemask_stencil_values = false; + } + else if (dsa->stencil[0].write_mask == 0x0 && dsa->stencil[1].write_mask == 0x0) { + /* All changes are writemasked out, so no need to calculate + * what those changes might be, and no need to write anything back. */ need_to_calculate_stencil_values = false; need_to_writemask_stencil_values = false; } - else if (dsa->stencil[0].write_mask == 0xff && (!dsa->stencil[1].enabled || dsa->stencil[1].write_mask == 0xff)) { + else if (dsa->stencil[0].write_mask == 0xff && dsa->stencil[1].write_mask == 0xff) { /* Still trivial, but a little less so. We need to write the stencil * values, but we don't need to mask them. */ |