diff options
Diffstat (limited to 'src/gallium/drivers/cell')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 154 |
1 files changed, 112 insertions, 42 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 8e4dd824043..6e2a5d29804 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -1141,13 +1141,17 @@ gen_colormask(struct spe_function *f, * access to the Compare Immediate instructions where we don't in * gen_depth_test(), which is what makes us very different. * + * There's some added complexity if there's a non-trivial state->mask + * value; then stencil and reference both must be masked + * * The return value in the stencil_pass_reg is a bitmask of valid * fragments that also passed the stencil test. The bitmask of valid - * fragments that failed would be found in (mask_reg & ~stencil_pass_reg). + * fragments that failed would be found in (fragment_mask_reg & ~stencil_pass_reg). */ static void gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, - unsigned int mask_reg, unsigned int fbS_reg, + unsigned int stencil_max_value, + unsigned int fragment_mask_reg, unsigned int fbS_reg, unsigned int stencil_pass_reg) { /* Generate code that puts the set of passing fragments into the stencil_pass_reg @@ -1155,68 +1159,134 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, */ switch (state->func) { case PIPE_FUNC_EQUAL: - /* stencil_pass = mask & (s == reference) */ - spe_compare_equal_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); - spe_and(f, stencil_pass_reg, mask_reg, stencil_pass_reg); + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & (s == reference) */ + spe_compare_equal_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + } + else { + /* stencil_pass = fragment_mask & ((s&mask) == (reference&mask)) */ + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_compare_equal_uint(f, stencil_pass_reg, tmp_masked_stencil, state->value_mask & state->ref_value); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_masked_stencil); + } break; case PIPE_FUNC_NOTEQUAL: - /* stencil_pass = mask & ~(s == reference) */ - spe_compare_equal_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); - spe_andc(f, stencil_pass_reg, mask_reg, stencil_pass_reg); + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & ~(s == reference) */ + spe_compare_equal_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + } + else { + /* stencil_pass = fragment_mask & ~((s&mask) == (reference&mask)) */ + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_compare_equal_uint(f, stencil_pass_reg, tmp_masked_stencil, state->value_mask & state->ref_value); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_masked_stencil); + } break; case PIPE_FUNC_GREATER: - /* stencil_pass = mask & (s > reference) */ - spe_compare_greater_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); - spe_and(f, stencil_pass_reg, mask_reg, stencil_pass_reg); + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & (s > reference) */ + spe_compare_greater_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + } + else { + /* stencil_pass = fragment_mask & ((s&mask) > (reference&mask)) */ + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_compare_greater_uint(f, stencil_pass_reg, tmp_masked_stencil, state->value_mask & state->ref_value); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_masked_stencil); + } break; - case PIPE_FUNC_LESS: { - /* stencil_pass = mask & (reference > s) */ - /* There's no convenient Compare Less Than Immediate instruction, so - * we'll have to do this one the harder way, by loading a register and - * comparing directly. Compare Logical Greater Than Word (clgt) - * treats its operands as unsigned - no sign extension. - */ - unsigned int tmp_reg = spe_allocate_available_register(f); - spe_load_uint(f, tmp_reg, state->ref_value); - spe_clgt(f, stencil_pass_reg, tmp_reg, fbS_reg); - spe_and(f, stencil_pass_reg, mask_reg, stencil_pass_reg); - spe_release_register(f, tmp_reg); + case PIPE_FUNC_LESS: + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & (reference > s) */ + /* There's no convenient Compare Less Than Immediate instruction, so + * we'll have to do this one the harder way, by loading a register and + * comparing directly. Compare Logical Greater Than Word (clgt) + * treats its operands as unsigned - no sign extension. + */ + unsigned int tmp_reg = spe_allocate_available_register(f); + spe_load_uint(f, tmp_reg, state->ref_value); + spe_clgt(f, stencil_pass_reg, tmp_reg, fbS_reg); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_reg); + } + else { + /* stencil_pass = fragment_mask & ((reference&mask) > (s&mask)) */ + unsigned int tmp_reg = spe_allocate_available_register(f); + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_load_uint(f, tmp_reg, state->value_mask & state->ref_value); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_clgt(f, stencil_pass_reg, tmp_reg, tmp_masked_stencil); + spe_and(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_reg); + spe_release_register(f, tmp_masked_stencil); + } break; - } case PIPE_FUNC_LEQUAL: - /* stencil_pass = mask & (s <= reference) = mask & ~(s > reference) */ - spe_compare_greater_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); - spe_andc(f, stencil_pass_reg, mask_reg, stencil_pass_reg); + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & (s <= reference) + * = fragment_mask & ~(s > reference) */ + spe_compare_greater_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + } + else { + /* stencil_pass = fragment_mask & ~((s&mask) > (reference&mask)) */ + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_compare_greater_uint(f, stencil_pass_reg, tmp_masked_stencil, state->value_mask & state->ref_value); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_masked_stencil); + } break; - case PIPE_FUNC_GEQUAL: { - /* stencil_pass = mask & (s >= reference) = mask & ~(reference > s) */ - /* As above, we have to do this by loading a register */ - unsigned int tmp_reg = spe_allocate_available_register(f); - spe_load_uint(f, tmp_reg, state->ref_value); - spe_clgt(f, stencil_pass_reg, tmp_reg, fbS_reg); - spe_andc(f, stencil_pass_reg, mask_reg, stencil_pass_reg); - spe_release_register(f, tmp_reg); + case PIPE_FUNC_GEQUAL: + if (state->value_mask == stencil_max_value) { + /* stencil_pass = fragment_mask & (s >= reference) ] + * = fragment_mask & ~(reference > s) */ + /* As above, we have to do this by loading a register */ + unsigned int tmp_reg = spe_allocate_available_register(f); + spe_load_uint(f, tmp_reg, state->ref_value); + spe_clgt(f, stencil_pass_reg, tmp_reg, fbS_reg); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_reg); + } + else { + /* stencil_pass = fragment_mask & ~((reference&mask) > (s&mask)) */ + unsigned int tmp_reg = spe_allocate_available_register(f); + unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + spe_load_uint(f, tmp_reg, state->ref_value & state->value_mask); + spe_and_uint(f, tmp_masked_stencil, fbS_reg, state->value_mask); + spe_clgt(f, stencil_pass_reg, tmp_reg, tmp_masked_stencil); + spe_andc(f, stencil_pass_reg, fragment_mask_reg, stencil_pass_reg); + spe_release_register(f, tmp_reg); + spe_release_register(f, tmp_masked_stencil); + } break; - } case PIPE_FUNC_NEVER: - /* stencil_pass = mask & 0 = 0 */ + /* stencil_pass = fragment_mask & 0 = 0 */ spe_load_uint(f, stencil_pass_reg, 0); break; case PIPE_FUNC_ALWAYS: - /* stencil_pass = mask & 1 = mask */ - spe_move(f, stencil_pass_reg, mask_reg); + /* stencil_pass = fragment_mask & 1 = fragment_mask */ + spe_move(f, stencil_pass_reg, fragment_mask_reg); break; } /* The fragments that passed the stencil test are now in stencil_pass_reg. - * The fragments that failed would be (mask_reg & ~stencil_pass_reg). + * The fragments that failed would be (fragment_mask_reg & ~stencil_pass_reg). */ } @@ -1596,7 +1666,7 @@ gen_stencil_depth_test(struct spe_function *f, */ spe_comment(f, 0, "Running basic stencil test"); stencil_pass_reg = spe_allocate_available_register(f); - gen_stencil_test(f, &dsa->stencil[0], mask_reg, fbS_reg, stencil_pass_reg); + gen_stencil_test(f, &dsa->stencil[0], 0xff, mask_reg, fbS_reg, stencil_pass_reg); /* If two-sided stenciling is on, generate code to run the stencil * test on the backfacing stencil as well, and combine the two results @@ -1605,7 +1675,7 @@ gen_stencil_depth_test(struct spe_function *f, if (dsa->stencil[1].enabled) { unsigned int temp_reg = spe_allocate_available_register(f); spe_comment(f, 0, "Running backface stencil test"); - gen_stencil_test(f, &dsa->stencil[1], mask_reg, fbS_reg, temp_reg); + gen_stencil_test(f, &dsa->stencil[1], 0xff, mask_reg, fbS_reg, temp_reg); spe_selb(f, stencil_pass_reg, stencil_pass_reg, temp_reg, facing_reg); spe_release_register(f, temp_reg); } |