diff options
Diffstat (limited to 'src/gallium/drivers/cell/ppu')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 88 |
1 files changed, 70 insertions, 18 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index de170d1036..4e1e53ecdc 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -247,6 +247,7 @@ setup_optional_register(struct spe_function *f, boolean *is_already_set, unsigne { if (*is_already_set) return; *r = spe_allocate_available_register(f); + *is_already_set = true; } static inline void @@ -1157,7 +1158,6 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, /* 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); - /* stencil_fail = mask & ~stencil_pass */ break; case PIPE_FUNC_NOTEQUAL: @@ -1207,7 +1207,6 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, case PIPE_FUNC_NEVER: /* stencil_pass = mask & 0 = 0 */ spe_load_uint(f, stencil_pass_reg, 0); - spe_move(f, stencil_pass_reg, mask_reg); /* zmask = mask */ break; case PIPE_FUNC_ALWAYS: @@ -1483,6 +1482,10 @@ gen_get_stencil_values(struct spe_function *f, const struct pipe_depth_stencil_a } /* End of calculations for back-facing stencil */ } +/* Note that fbZ_reg may *not* be set on entry, if in fact + * the depth test is not enabled. This function must not use + * the register if depth is not enabled. + */ static boolean gen_stencil_depth_test(struct spe_function *f, const struct pipe_depth_stencil_alpha_state *dsa, @@ -1522,6 +1525,7 @@ gen_stencil_depth_test(struct spe_function *f, * have to spend the complexity to track the more difficult variant * register usage scenarios. */ + spe_comment(f, 0, "Allocating stencil register set"); spe_allocate_register_set(f); /* Calculate the writemask. If the writemask is trivial (either @@ -1538,7 +1542,7 @@ gen_stencil_depth_test(struct spe_function *f, 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 == 0x00)) { + else if (dsa->stencil[0].write_mask == 0xff && (!dsa->stencil[1].enabled || 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. */ @@ -1556,10 +1560,12 @@ gen_stencil_depth_test(struct spe_function *f, * writemask, we'll have to generate code that merges the * two masks into a single effective mask based on fragment facing. */ + spe_comment(f, 0, "Computing stencil writemask"); stencil_writemask_reg = spe_allocate_available_register(f); spe_load_uint(f, stencil_writemask_reg, dsa->stencil[0].write_mask); if (dsa->stencil[1].enabled && dsa->stencil[0].write_mask != dsa->stencil[1].write_mask) { unsigned int back_write_mask_reg = spe_allocate_available_register(f); + spe_comment(f, 0, "Resolving two-sided stencil writemask"); spe_load_uint(f, back_write_mask_reg, dsa->stencil[1].write_mask); spe_selb(f, stencil_writemask_reg, stencil_writemask_reg, back_write_mask_reg, facing_reg); spe_release_register(f, back_write_mask_reg); @@ -1575,6 +1581,7 @@ gen_stencil_depth_test(struct spe_function *f, * This test will *not* change the value in mask_reg (because we don't * yet know whether to apply the two-sided stencil or one-sided stencil). */ + 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); @@ -1584,6 +1591,7 @@ 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); spe_selb(f, stencil_pass_reg, stencil_pass_reg, temp_reg, facing_reg); spe_release_register(f, temp_reg); @@ -1597,6 +1605,7 @@ gen_stencil_depth_test(struct spe_function *f, * stencil test, and because the depth test will update the * mask of valid fragments based on the results of the depth test). */ + spe_comment(f, 0, "Computing stencil fail mask and updating fragment mask"); stencil_fail_reg = spe_allocate_available_register(f); spe_andc(f, stencil_fail_reg, mask_reg, stencil_pass_reg); /* Now remove the stenciled-out pixels from the valid fragment mask, @@ -1623,6 +1632,7 @@ gen_stencil_depth_test(struct spe_function *f, * This function will allocate a variant number of registers that * will be released as part of the register set. */ + spe_comment(f, 0, "Computing stencil values"); gen_get_stencil_values(f, dsa, fbS_reg, &front_stencil_fail_values, &front_stencil_pass_depth_fail_values, &front_stencil_pass_depth_pass_values, &back_stencil_fail_values, @@ -1652,6 +1662,7 @@ gen_stencil_depth_test(struct spe_function *f, stencil_pass_depth_pass_values = front_stencil_pass_depth_pass_values; } else { /* two-sided stencil enabled */ + spe_comment(f, 0, "Resolving backface stencil values"); /* Allocate new registers for the needed merged values */ stencil_fail_values = spe_allocate_available_register(f); spe_selb(f, stencil_fail_values, front_stencil_fail_values, back_stencil_fail_values, facing_reg); @@ -1678,11 +1689,13 @@ gen_stencil_depth_test(struct spe_function *f, * on the results of the test. */ if (dsa->depth.enabled) { + spe_comment(f, 0, "Running stencil depth test"); zmask_reg = spe_allocate_available_register(f); modified_buffers |= gen_depth_test(f, dsa, mask_reg, fragZ_reg, fbZ_reg, zmask_reg); } if (need_to_calculate_stencil_values) { + /* If we need to writemask the stencil values before going into * the stencil buffer, we'll have to use a new register to * hold the new values. If not, we can just keep using the @@ -1690,8 +1703,8 @@ gen_stencil_depth_test(struct spe_function *f, */ if (need_to_writemask_stencil_values) { newS_reg = spe_allocate_available_register(f); + spe_comment(f, 0, "Saving current stencil values for writemasking"); spe_move(f, newS_reg, fbS_reg); - modified_buffers = true; } else { newS_reg = fbS_reg; @@ -1699,7 +1712,9 @@ gen_stencil_depth_test(struct spe_function *f, /* Merge in the selected stencil fail values */ if (stencil_fail_values != fbS_reg) { + spe_comment(f, 0, "Loading stencil fail values"); spe_selb(f, newS_reg, newS_reg, stencil_fail_values, stencil_fail_reg); + modified_buffers = true; } /* Same for the stencil pass/depth fail values. If this calculation @@ -1714,20 +1729,36 @@ gen_stencil_depth_test(struct spe_function *f, * set above if we're here. */ unsigned int stencil_pass_depth_fail_mask = spe_allocate_available_register(f); + spe_comment(f, 0, "Loading stencil pass/depth fail values"); spe_andc(f, stencil_pass_depth_fail_mask, stencil_pass_reg, zmask_reg); spe_selb(f, newS_reg, newS_reg, stencil_pass_depth_fail_values, stencil_pass_depth_fail_mask); spe_release_register(f, stencil_pass_depth_fail_mask); + modified_buffers = true; } - /* Same for the stencil pass/depth pass mask */ + /* Same for the stencil pass/depth pass mask. Note that we + * *can* get here with zmask_reg being unset (if the depth + * test is off but the stencil test is on). In this case, + * we assume the depth test passes, and don't need to mask + * the stencil pass mask with the Z mask. + */ if (stencil_pass_depth_pass_values != fbS_reg) { - unsigned int stencil_pass_depth_pass_mask = spe_allocate_available_register(f); - spe_and(f, stencil_pass_depth_pass_mask, stencil_pass_reg, zmask_reg); - - spe_selb(f, newS_reg, newS_reg, stencil_pass_depth_pass_values, stencil_pass_depth_pass_mask); - spe_release_register(f, stencil_pass_depth_pass_mask); + if (dsa->depth.enabled) { + unsigned int stencil_pass_depth_pass_mask = spe_allocate_available_register(f); + /* We'll need a separate register */ + spe_comment(f, 0, "Loading stencil pass/depth pass values"); + spe_and(f, stencil_pass_depth_pass_mask, stencil_pass_reg, zmask_reg); + spe_selb(f, newS_reg, newS_reg, stencil_pass_depth_pass_values, stencil_pass_depth_pass_mask); + spe_release_register(f, stencil_pass_depth_pass_mask); + } + else { + /* We can use the same stencil-pass register */ + spe_comment(f, 0, "Loading stencil pass values"); + spe_selb(f, newS_reg, newS_reg, stencil_pass_depth_pass_values, stencil_pass_reg); + } + modified_buffers = true; } /* Almost done. If we need to writemask, do it now, leaving the @@ -1736,14 +1767,16 @@ gen_stencil_depth_test(struct spe_function *f, * so there's nothing more to do. */ - if (need_to_writemask_stencil_values) { + if (need_to_writemask_stencil_values && modified_buffers) { /* The Select Bytes command makes a fine writemask. Where * the mask is 0, the first (original) values are retained, * effectively masking out changes. Where the mask is 1, the * second (new) values are retained, incorporating changes. */ + spe_comment(f, 0, "Writemasking new stencil values"); spe_selb(f, fbS_reg, fbS_reg, newS_reg, stencil_writemask_reg); } + } /* done calculating stencil values */ /* The stencil and/or depth values have been applied, and the @@ -1752,6 +1785,7 @@ gen_stencil_depth_test(struct spe_function *f, * of registers that we didn't bother tracking. Release all * those registers as part of the register set, and go home. */ + spe_comment(f, 0, "Releasing stencil register set"); spe_release_register_set(f); /* Return true if we could have modified the stencil and/or @@ -1869,7 +1903,7 @@ cell_gen_fragment_function(struct cell_context *cell, struct spe_function *f) boolean fbS_reg_set = false, fbZ_reg_set = false; unsigned int fbS_reg, fbZ_reg = 0; - spe_comment(f, 0, "Fetch quad's Z/stencil values from tile"); + spe_comment(f, 0, "Fetching Z/stencil quad from tile"); /* fetch quad of depth/stencil values from tile at (x,y) */ /* Load: fbZS_reg = memory[depth_tile_reg + offset_reg] */ @@ -1973,13 +2007,18 @@ cell_gen_fragment_function(struct cell_context *cell, struct spe_function *f) * tests. */ ASSERT(fbS_reg_set); - ASSERT(fbZ_reg_set); spe_comment(f, 0, "Perform stencil test"); + /* Note that fbZ_reg may not be set on entry, if stenciling + * is enabled but there's no Z-buffer. The + * gen_stencil_depth_test() function must ignore the + * fbZ_reg register if depth is not enabled. + */ write_depth_stencil = gen_stencil_depth_test(f, dsa, facing_reg, mask_reg, fragZ_reg, fbZ_reg, fbS_reg); } else if (dsa->depth.enabled) { int zmask_reg = spe_allocate_available_register(f); + ASSERT(fbZ_reg_set); spe_comment(f, 0, "Perform depth test"); write_depth_stencil = gen_depth_test(f, dsa, mask_reg, fragZ_reg, fbZ_reg, zmask_reg); spe_release_register(f, zmask_reg); @@ -1996,26 +2035,39 @@ 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) { + 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); } } else if (zs_format == PIPE_FORMAT_Z24S8_UNORM || zs_format == PIPE_FORMAT_Z24X8_UNORM) { - spe_shli(f, fbZ_reg, fbZ_reg, 8); /* fbZ = fbZ << 8 */ - if (fbS_reg_set) { + 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 */ + } } else if (zs_format == PIPE_FORMAT_Z32_UNORM) { - spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ + if (fbZ_reg_set) { + spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ + } } else if (zs_format == PIPE_FORMAT_Z16_UNORM) { - spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ + if (fbZ_reg_set) { + spe_move(f, fbZS_reg, fbZ_reg); /* fbZS = fbZ */ + } } else if (zs_format == PIPE_FORMAT_S8_UNORM) { ASSERT(0); /* XXX to do */ |