diff options
Diffstat (limited to 'src/gallium/drivers/cell')
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 392 |
1 files changed, 213 insertions, 179 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index e5486dc4c0..eb6ce8d2d5 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -1316,7 +1316,9 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, */ } -/* This function generates code that calculates a set of new stencil values + +/** + * This function generates code that calculates a set of new stencil values * given the earlier values and the operation to apply. It does not * apply any tests. It is intended to be called up to 3 times * (for the stencil fail operation, for the stencil pass-z fail operation, @@ -1426,7 +1428,8 @@ gen_stencil_values(struct spe_function *f, } -/* This function generates code to get all the necessary possible +/** + * This function generates code to get all the necessary possible * stencil values. For each of the output registers (fail_reg, * zfail_reg, and zpass_reg), it either allocates a new register * and calculates a new set of values based on the stencil operation, @@ -1511,7 +1514,8 @@ gen_get_stencil_values(struct spe_function *f, } } -/* Note that fbZ_reg may *not* be set on entry, if in fact +/** + * 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. */ @@ -1794,6 +1798,205 @@ gen_stencil_depth_test(struct spe_function *f, /** + * Generate depth and/or stencil test code. + * \param cell context + * \param dsa depth/stencil/alpha state + * \param f spe function to emit + * \param facing either CELL_FACING_FRONT or CELL_FACING_BACK + * \param mask_reg register containing the pixel alive/dead mask + * \param depth_tile_reg register containing address of z/stencil tile + * \param quad_offset_reg offset to quad from start of tile + * \param fragZ_reg register containg fragment Z values + */ +static void +gen_depth_stencil(struct cell_context *cell, + const struct pipe_depth_stencil_alpha_state *dsa, + struct spe_function *f, + uint facing, + uint mask_reg, + uint depth_tile_reg, + uint quad_offset_reg, + uint fragZ_reg) + +{ + const enum pipe_format zs_format = cell->framebuffer.zsbuf->format; + boolean write_depth_stencil; + + /* We may or may not need to allocate a register for Z or stencil values */ + boolean fbS_reg_set = false, fbZ_reg_set = false; + unsigned int fbS_reg, fbZ_reg = 0; + + /* framebuffer's combined z/stencil values for quad */ + int fbZS_reg = spe_allocate_available_register(f); + + + spe_comment(f, 0, "Fetch 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] */ + /* XXX Not sure this is allowed if we've only got a 16-bit Z buffer... */ + spe_lqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); + + /* From the Z/stencil buffer format, pull out the bits we need for + * 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: + /* 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: + 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: + 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; + + case PIPE_FORMAT_Z16_UNORM: + /* 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 */ + } + + /* If stencil is enabled, use the stencil-specific code + * generator to generate both the stencil and depth (if needed) + * tests. Otherwise, if only depth is enabled, generate + * a quick depth test. The test generators themselves will + * report back whether the depth/stencil buffer has to be + * written back. + */ + if (dsa->stencil[0].enabled) { + /* This will perform the stencil and depth tests, and update + * the mask_reg, fbZ_reg, and fbS_reg as required by the + * tests. + */ + ASSERT(fbS_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, + 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); + } + else { + write_depth_stencil = false; + } + + if (write_depth_stencil) { + /* Merge latest Z and Stencil values into fbZS_reg. + * fbZ_reg has four Z vals in bits [23..0] or bits [15..0]. + * fbS_reg has four 8-bit Z values in bits [7..0]. + */ + 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) { + 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) { + 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) { + 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 */ + } + else if (zs_format == PIPE_FORMAT_S8_UNORM) { + ASSERT(0); /* XXX to do */ + } + else { + ASSERT(0); /* bad zs_format */ + } + + /* Store: memory[depth_tile_reg + quad_offset_reg] = fbZS */ + 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); + spe_release_register(f, fbZS_reg); +} + + + +/** * Generate SPE code to implement the fragment operations (alpha test, * depth test, stencil test, blending, colormask, and final * framebuffer write) as specified by the current context state. @@ -1848,7 +2051,6 @@ cell_gen_fragment_function(struct cell_context *cell, int quad_offset_reg; int fbRGBA_reg; /**< framebuffer's RGBA colors for quad */ - int fbZS_reg; /**< framebuffer's combined z/stencil values for quad */ if (cell->debug_flags & CELL_DEBUG_ASM) { spe_print_code(f, true); @@ -1871,7 +2073,6 @@ cell_gen_fragment_function(struct cell_context *cell, quad_offset_reg = spe_allocate_available_register(f); fbRGBA_reg = spe_allocate_available_register(f); - fbZS_reg = spe_allocate_available_register(f); /* compute offset of quad from start of tile, in bytes */ { @@ -1896,180 +2097,14 @@ cell_gen_fragment_function(struct cell_context *cell, gen_alpha_test(dsa, f, mask_reg, fragA_reg); } - /* If we need the stencil buffers (because one- or two-sided stencil is - * enabled) or the depth buffer (because the depth test is enabled), - * go grab them. Note that if either one- or two-sided stencil is - * enabled, dsa->stencil[0].enabled will be true. - */ + /* generate depth and/or stencil test code */ if (dsa->depth.enabled || dsa->stencil[0].enabled) { - const enum pipe_format zs_format = cell->framebuffer.zsbuf->format; - boolean write_depth_stencil; - - /* We may or may not need to allocate a register for Z or stencil values */ - boolean fbS_reg_set = false, fbZ_reg_set = false; - unsigned int fbS_reg, fbZ_reg = 0; - - spe_comment(f, 0, "Fetch 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] */ - /* XXX Not sure this is allowed if we've only got a 16-bit Z buffer... */ - spe_lqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); - - /* From the Z/stencil buffer format, pull out the bits we need for - * 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: - /* 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: - 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: - 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; - - case PIPE_FORMAT_Z16_UNORM: - /* 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 */ - } - - /* If stencil is enabled, use the stencil-specific code - * generator to generate both the stencil and depth (if needed) - * tests. Otherwise, if only depth is enabled, generate - * a quick depth test. The test generators themselves will - * report back whether the depth/stencil buffer has to be - * written back. - */ - if (dsa->stencil[0].enabled) { - /* This will perform the stencil and depth tests, and update - * the mask_reg, fbZ_reg, and fbS_reg as required by the - * tests. - */ - ASSERT(fbS_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, - 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); - } - else { - write_depth_stencil = false; - } - - if (write_depth_stencil) { - /* Merge latest Z and Stencil values into fbZS_reg. - * fbZ_reg has four Z vals in bits [23..0] or bits [15..0]. - * fbS_reg has four 8-bit Z values in bits [7..0]. - */ - 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) { - 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) { - 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) { - 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 */ - } - else if (zs_format == PIPE_FORMAT_S8_UNORM) { - ASSERT(0); /* XXX to do */ - } - else { - ASSERT(0); /* bad zs_format */ - } - - /* Store: memory[depth_tile_reg + quad_offset_reg] = fbZS */ - 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); + gen_depth_stencil(cell, dsa, f, + facing, + mask_reg, + depth_tile_reg, + quad_offset_reg, + fragZ_reg); } /* Get framebuffer quad/colors. We'll need these for blending, @@ -2133,7 +2168,6 @@ cell_gen_fragment_function(struct cell_context *cell, spe_bi(f, SPE_REG_RA, 0, 0); /* return from function call */ spe_release_register(f, fbRGBA_reg); - spe_release_register(f, fbZS_reg); spe_release_register(f, quad_offset_reg); if (cell->debug_flags & CELL_DEBUG_ASM) { |