diff options
Diffstat (limited to 'src/gallium/drivers/cell/ppu/cell_gen_fragment.c')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 332 |
1 files changed, 197 insertions, 135 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 4e1e53ecdc7..d9c3ff3f4d0 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). */ } @@ -1282,7 +1352,7 @@ 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 +1365,7 @@ 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 +1604,28 @@ 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. */ @@ -1583,7 +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 @@ -1592,7 +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); } @@ -1914,81 +1997,79 @@ cell_gen_fragment_function(struct cell_context *cell, struct spe_function *f) * Z and/or stencil. We'll also convert the incoming fragment Z * value in fragZ_reg from a floating point value in [0.0..1.0] to * an unsigned integer value with the appropriate resolution. + * Note that even if depth or stencil is *not* enabled, if it's + * present in the buffer, we pull it out and put it back later; + * otherwise, we can inadvertently destroy the contents of + * buffers we're not supposed to touch (e.g., if the user is + * clearing the depth buffer but not the stencil buffer, a + * quad of constant depth is drawn over the surface; the stencil + * buffer must be maintained). */ switch(zs_format) { case PIPE_FORMAT_S8Z24_UNORM: /* fall through */ case PIPE_FORMAT_X8Z24_UNORM: - if (dsa->depth.enabled) { - /* We need the Z part at least */ - setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); - /* four 24-bit Z values in the low-order bits */ - spe_and_uint(f, fbZ_reg, fbZS_reg, 0x00ffffff); - - /* Incoming fragZ_reg value is a float in 0.0...1.0; convert - * to a 24-bit unsigned integer - */ - spe_cfltu(f, fragZ_reg, fragZ_reg, 32); - spe_rotmi(f, fragZ_reg, fragZ_reg, -8); - } - if (dsa->stencil[0].enabled) { - setup_optional_register(f, &fbS_reg_set, &fbS_reg); - /* four 8-bit Z values in the high-order bits */ - spe_rotmi(f, fbS_reg, fbZS_reg, -24); - } - break; + /* Pull out both Z and stencil */ + setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); + setup_optional_register(f, &fbS_reg_set, &fbS_reg); + + /* four 24-bit Z values in the low-order bits */ + spe_and_uint(f, fbZ_reg, fbZS_reg, 0x00ffffff); + + /* Incoming fragZ_reg value is a float in 0.0...1.0; convert + * to a 24-bit unsigned integer + */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + spe_rotmi(f, fragZ_reg, fragZ_reg, -8); + + /* four 8-bit stencil values in the high-order bits */ + spe_rotmi(f, fbS_reg, fbZS_reg, -24); + break; case PIPE_FORMAT_Z24S8_UNORM: /* fall through */ case PIPE_FORMAT_Z24X8_UNORM: - if (dsa->depth.enabled) { - setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); - /* shift by 8 to get the upper 24-bit values */ - spe_rotmi(f, fbS_reg, fbZS_reg, -8); - - /* Incoming fragZ_reg value is a float in 0.0...1.0; convert - * to a 24-bit unsigned integer - */ - spe_cfltu(f, fragZ_reg, fragZ_reg, 32); - spe_rotmi(f, fragZ_reg, fragZ_reg, -8); - } - if (dsa->stencil[0].enabled) { - setup_optional_register(f, &fbS_reg_set, &fbS_reg); - /* 8-bit stencil in the low-order bits - mask them out */ - spe_and_uint(f, fbS_reg, fbZS_reg, 0x000000ff); - } - break; + setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); + setup_optional_register(f, &fbS_reg_set, &fbS_reg); + + /* shift by 8 to get the upper 24-bit values */ + spe_rotmi(f, fbS_reg, fbZS_reg, -8); + + /* Incoming fragZ_reg value is a float in 0.0...1.0; convert + * to a 24-bit unsigned integer + */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + spe_rotmi(f, fragZ_reg, fragZ_reg, -8); + + /* 8-bit stencil in the low-order bits - mask them out */ + spe_and_uint(f, fbS_reg, fbZS_reg, 0x000000ff); + break; case PIPE_FORMAT_Z32_UNORM: - if (dsa->depth.enabled) { - setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); - /* Copy over 4 32-bit values */ - spe_move(f, fbZ_reg, fbZS_reg); - - /* Incoming fragZ_reg value is a float in 0.0...1.0; convert - * to a 32-bit unsigned integer - */ - spe_cfltu(f, fragZ_reg, fragZ_reg, 32); - } + setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); + /* Copy over 4 32-bit values */ + spe_move(f, fbZ_reg, fbZS_reg); + + /* Incoming fragZ_reg value is a float in 0.0...1.0; convert + * to a 32-bit unsigned integer + */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); /* No stencil, so can't do anything there */ - break; + break; case PIPE_FORMAT_Z16_UNORM: - if (dsa->depth.enabled) { - /* XXX Not sure this is correct, but it was here before, so we're - * going with it for now - */ - setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); - /* Copy over 4 32-bit values */ - spe_move(f, fbZ_reg, fbZS_reg); - - /* Incoming fragZ_reg value is a float in 0.0...1.0; convert - * to a 16-bit unsigned integer - */ - spe_cfltu(f, fragZ_reg, fragZ_reg, 32); - spe_rotmi(f, fragZ_reg, fragZ_reg, -16); - } + /* XXX Not sure this is correct, but it was here before, so we're + * going with it for now + */ + setup_optional_register(f, &fbZ_reg_set, &fbZ_reg); + /* Copy over 4 32-bit values */ + spe_move(f, fbZ_reg, fbZS_reg); + + /* Incoming fragZ_reg value is a float in 0.0...1.0; convert + * to a 16-bit unsigned integer + */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + spe_rotmi(f, fragZ_reg, fragZ_reg, -16); /* No stencil */ - break; default: ASSERT(0); /* invalid format */ @@ -2035,39 +2116,19 @@ cell_gen_fragment_function(struct cell_context *cell, struct spe_function *f) spe_comment(f, 0, "Store quad's depth/stencil values in tile"); if (zs_format == PIPE_FORMAT_S8Z24_UNORM || zs_format == PIPE_FORMAT_X8Z24_UNORM) { - if (fbS_reg_set && fbZ_reg_set) { - spe_shli(f, fbS_reg, fbS_reg, 24); /* fbS = fbS << 24 */ - spe_or(f, fbZS_reg, fbS_reg, fbZ_reg); /* fbZS = fbS | fbZ */ - } - else if (fbS_reg_set) { - spe_shli(f, fbZS_reg, fbS_reg, 24); /* fbS = fbS << 24 */ - } - else { - spe_move(f, fbZS_reg, fbZ_reg); - } + spe_shli(f, fbS_reg, fbS_reg, 24); /* fbS = fbS << 24 */ + spe_or(f, fbZS_reg, fbS_reg, fbZ_reg); /* fbZS = fbS | fbZ */ } else if (zs_format == PIPE_FORMAT_Z24S8_UNORM || zs_format == PIPE_FORMAT_Z24X8_UNORM) { - if (fbS_reg_set && fbZ_reg_set) { - spe_shli(f, fbZ_reg, fbZ_reg, 8); /* fbZ = fbZ << 8 */ - spe_or(f, fbZS_reg, fbS_reg, fbZ_reg); /* fbZS = fbS | fbZ */ - } - else if (fbS_reg_set) { - spe_move(f, fbZS_reg, fbS_reg); - } - else { - spe_shli(f, fbZ_reg, fbZ_reg, 8); /* fbZ = fbZ << 8 */ - } + spe_shli(f, fbZ_reg, fbZ_reg, 8); /* fbZ = fbZ << 8 */ + spe_or(f, fbZS_reg, fbS_reg, fbZ_reg); /* fbZS = fbS | fbZ */ } else if (zs_format == PIPE_FORMAT_Z32_UNORM) { - if (fbZ_reg_set) { - spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ - } + spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ } else if (zs_format == PIPE_FORMAT_Z16_UNORM) { - if (fbZ_reg_set) { - spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ - } + spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ } else if (zs_format == PIPE_FORMAT_S8_UNORM) { ASSERT(0); /* XXX to do */ @@ -2080,6 +2141,7 @@ cell_gen_fragment_function(struct cell_context *cell, struct spe_function *f) spe_stqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); } + /* Don't need these any more */ release_optional_register(f, &fbZ_reg_set, fbZ_reg); release_optional_register(f, &fbS_reg_set, fbS_reg); } |