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 | 834 |
1 files changed, 457 insertions, 377 deletions
diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 2c64eb1bcc..0ea8f017ef 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -2,6 +2,7 @@ * * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. + * Copyright 2009 VMware, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the @@ -25,11 +26,10 @@ * **************************************************************************/ - - /** * Generate SPU per-fragment code (actually per-quad code). * \author Brian Paul + * \author Bob Ellison */ @@ -55,7 +55,7 @@ * \param ifbZ_reg register containing integer frame buffer Z values (in/out) * \param zmask_reg register containing result of Z test/comparison (out) * - * Returns true if the Z-buffer needs to be updated. + * Returns TRUE if the Z-buffer needs to be updated. */ static boolean gen_depth_test(struct spe_function *f, @@ -134,10 +134,10 @@ gen_depth_test(struct spe_function *f, * framebufferZ = (ztest_passed ? fragmentZ : framebufferZ; */ spe_selb(f, ifbZ_reg, ifbZ_reg, ifragZ_reg, mask_reg); - return true; + return TRUE; } - return false; + return FALSE; } @@ -237,41 +237,136 @@ gen_alpha_test(const struct pipe_depth_stencil_alpha_state *dsa, spe_release_register(f, amask_reg); } -/* This pair of functions is used inline to allocate and deallocate + +/** + * This pair of functions is used inline to allocate and deallocate * optional constant registers. Once a constant is discovered to be * needed, we will likely need it again, so we don't want to deallocate * it and have to allocate and load it again unnecessarily. */ -static inline void -setup_optional_register(struct spe_function *f, boolean *is_already_set, unsigned int *r) +static INLINE void +setup_optional_register(struct spe_function *f, + int *r) { - if (*is_already_set) return; - *r = spe_allocate_available_register(f); - *is_already_set = true; + if (*r < 0) + *r = spe_allocate_available_register(f); } -static inline void -release_optional_register(struct spe_function *f, boolean *is_already_set, unsigned int r) +static INLINE void +release_optional_register(struct spe_function *f, + int r) { - if (!*is_already_set) return; - spe_release_register(f, r); - *is_already_set = false; + if (r >= 0) + spe_release_register(f, r); } -static inline void -setup_const_register(struct spe_function *f, boolean *is_already_set, unsigned int *r, float value) +static INLINE void +setup_const_register(struct spe_function *f, + int *r, + float value) { - if (*is_already_set) return; - setup_optional_register(f, is_already_set, r); + if (*r >= 0) + return; + setup_optional_register(f, r); spe_load_float(f, *r, value); } -static inline void -release_const_register(struct spe_function *f, boolean *is_already_set, unsigned int r) +static INLINE void +release_const_register(struct spe_function *f, + int r) { - release_optional_register(f, is_already_set, r); + release_optional_register(f, r); } + + +/** + * Unpack/convert framebuffer colors from four 32-bit packed colors + * (fbRGBA) to four float RGBA vectors (fbR, fbG, fbB, fbA). + * Each 8-bit color component is expanded into a float in [0.0, 1.0]. + */ +static void +unpack_colors(struct spe_function *f, + enum pipe_format color_format, + int fbRGBA_reg, + int fbR_reg, int fbG_reg, int fbB_reg, int fbA_reg) +{ + int mask0_reg = spe_allocate_available_register(f); + int mask1_reg = spe_allocate_available_register(f); + int mask2_reg = spe_allocate_available_register(f); + int mask3_reg = spe_allocate_available_register(f); + + spe_load_int(f, mask0_reg, 0xff); + spe_load_int(f, mask1_reg, 0xff00); + spe_load_int(f, mask2_reg, 0xff0000); + spe_load_int(f, mask3_reg, 0xff000000); + + spe_comment(f, 0, "Unpack framebuffer colors, convert to floats"); + + switch (color_format) { + case PIPE_FORMAT_A8R8G8B8_UNORM: + /* fbB = fbRGBA & mask */ + spe_and(f, fbB_reg, fbRGBA_reg, mask0_reg); + + /* fbG = fbRGBA & mask */ + spe_and(f, fbG_reg, fbRGBA_reg, mask1_reg); + + /* fbR = fbRGBA & mask */ + spe_and(f, fbR_reg, fbRGBA_reg, mask2_reg); + + /* fbA = fbRGBA & mask */ + spe_and(f, fbA_reg, fbRGBA_reg, mask3_reg); + + /* fbG = fbG >> 8 */ + spe_roti(f, fbG_reg, fbG_reg, -8); + + /* fbR = fbR >> 16 */ + spe_roti(f, fbR_reg, fbR_reg, -16); + + /* fbA = fbA >> 24 */ + spe_roti(f, fbA_reg, fbA_reg, -24); + break; + + case PIPE_FORMAT_B8G8R8A8_UNORM: + /* fbA = fbRGBA & mask */ + spe_and(f, fbA_reg, fbRGBA_reg, mask0_reg); + + /* fbR = fbRGBA & mask */ + spe_and(f, fbR_reg, fbRGBA_reg, mask1_reg); + + /* fbG = fbRGBA & mask */ + spe_and(f, fbG_reg, fbRGBA_reg, mask2_reg); + + /* fbB = fbRGBA & mask */ + spe_and(f, fbB_reg, fbRGBA_reg, mask3_reg); + + /* fbR = fbR >> 8 */ + spe_roti(f, fbR_reg, fbR_reg, -8); + + /* fbG = fbG >> 16 */ + spe_roti(f, fbG_reg, fbG_reg, -16); + + /* fbB = fbB >> 24 */ + spe_roti(f, fbB_reg, fbB_reg, -24); + break; + + default: + ASSERT(0); + } + + /* convert int[4] in [0,255] to float[4] in [0.0, 1.0] */ + spe_cuflt(f, fbR_reg, fbR_reg, 8); + spe_cuflt(f, fbG_reg, fbG_reg, 8); + spe_cuflt(f, fbB_reg, fbB_reg, 8); + spe_cuflt(f, fbA_reg, fbA_reg, 8); + + spe_release_register(f, mask0_reg); + spe_release_register(f, mask1_reg); + spe_release_register(f, mask2_reg); + spe_release_register(f, mask3_reg); +} + + /** * Generate SPE code to implement the given blend mode for a quad of pixels. * \param f SPE function to append instruction onto. @@ -310,90 +405,14 @@ gen_blend(const struct pipe_blend_state *blend, * if we do use them, make sure we only allocate them once by * keeping a flag on each one. */ - boolean one_reg_set = false; - unsigned int one_reg; - boolean constR_reg_set = false, constG_reg_set = false, - constB_reg_set = false, constA_reg_set = false; - unsigned int constR_reg, constG_reg, constB_reg, constA_reg; + int one_reg = -1; + int constR_reg = -1, constG_reg = -1, constB_reg = -1, constA_reg = -1; ASSERT(blend->blend_enable); - /* Unpack/convert framebuffer colors from four 32-bit packed colors - * (fbRGBA) to four float RGBA vectors (fbR, fbG, fbB, fbA). - * Each 8-bit color component is expanded into a float in [0.0, 1.0]. - */ - { - int mask_reg = spe_allocate_available_register(f); - - /* mask = {0x000000ff, 0x000000ff, 0x000000ff, 0x000000ff} */ - spe_load_int(f, mask_reg, 0xff); - - /* XXX there may be more clever ways to implement the following code */ - switch (color_format) { - case PIPE_FORMAT_A8R8G8B8_UNORM: - /* fbB = fbB & mask */ - spe_and(f, fbB_reg, fbRGBA_reg, mask_reg); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbG = fbRGBA & mask */ - spe_and(f, fbG_reg, fbRGBA_reg, mask_reg); - /* fbG = fbG >> 8 */ - spe_roti(f, fbG_reg, fbG_reg, -8); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbR = fbRGBA & mask */ - spe_and(f, fbR_reg, fbRGBA_reg, mask_reg); - /* fbR = fbR >> 16 */ - spe_roti(f, fbR_reg, fbR_reg, -16); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbA = fbRGBA & mask */ - spe_and(f, fbA_reg, fbRGBA_reg, mask_reg); - /* fbA = fbA >> 24 */ - spe_roti(f, fbA_reg, fbA_reg, -24); - break; - - case PIPE_FORMAT_B8G8R8A8_UNORM: - /* fbA = fbA & mask */ - spe_and(f, fbA_reg, fbRGBA_reg, mask_reg); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbR = fbRGBA & mask */ - spe_and(f, fbR_reg, fbRGBA_reg, mask_reg); - /* fbR = fbR >> 8 */ - spe_roti(f, fbR_reg, fbR_reg, -8); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbG = fbRGBA & mask */ - spe_and(f, fbG_reg, fbRGBA_reg, mask_reg); - /* fbG = fbG >> 16 */ - spe_roti(f, fbG_reg, fbG_reg, -16); - /* mask = mask << 8 */ - spe_roti(f, mask_reg, mask_reg, 8); - - /* fbB = fbRGBA & mask */ - spe_and(f, fbB_reg, fbRGBA_reg, mask_reg); - /* fbB = fbB >> 24 */ - spe_roti(f, fbB_reg, fbB_reg, -24); - break; - - default: - ASSERT(0); - } - - /* convert int[4] in [0,255] to float[4] in [0.0, 1.0] */ - spe_cuflt(f, fbR_reg, fbR_reg, 8); - spe_cuflt(f, fbG_reg, fbG_reg, 8); - spe_cuflt(f, fbB_reg, fbB_reg, 8); - spe_cuflt(f, fbA_reg, fbA_reg, 8); - - spe_release_register(f, mask_reg); - } + /* packed RGBA -> float colors */ + unpack_colors(f, color_format, fbRGBA_reg, + fbR_reg, fbG_reg, fbB_reg, fbA_reg); /* * Compute Src RGB terms. We're actually looking for the value @@ -476,9 +495,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_CONST_COLOR: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* now, factor = (Rc,Gc,Bc), so term = (R*Rc,G*Gc,B*Bc) */ spe_fm(f, term1R_reg, fragR_reg, constR_reg); spe_fm(f, term1G_reg, fragG_reg, constG_reg); @@ -486,7 +505,7 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_CONST_ALPHA: /* we'll need the optional constant alpha register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = (Ac,Ac,Ac), so term = (R*Ac,G*Ac,B*Ac) */ spe_fm(f, term1R_reg, fragR_reg, constA_reg); spe_fm(f, term1G_reg, fragG_reg, constA_reg); @@ -494,9 +513,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_INV_CONST_COLOR: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* factor = (1-Rc,1-Gc,1-Bc), so term = (R*(1-Rc),G*(1-Gc),B*(1-Bc)) * or term = (R-R*Rc, G-G*Gc, B-B*Bc) * fnms(a,b,c,d) computes a = d - b*c @@ -507,9 +526,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_INV_CONST_ALPHA: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* factor = (1-Ac,1-Ac,1-Ac), so term = (R*(1-Ac),G*(1-Ac),B*(1-Ac)) * or term = (R-R*Ac,G-G*Ac,B-B*Ac) * fnms(a,b,c,d) computes a = d - b*c @@ -520,7 +539,7 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: /* We'll need the optional {1,1,1,1} register */ - setup_const_register(f, &one_reg_set, &one_reg, 1.0f); + setup_const_register(f, &one_reg, 1.0f); /* factor = (min(A,1-Afb),min(A,1-Afb),min(A,1-Afb)), so * term = (R*min(A,1-Afb), G*min(A,1-Afb), B*min(A,1-Afb)) * We could expand the term (as a*min(b,c) == min(a*b,a*c) @@ -598,7 +617,7 @@ gen_blend(const struct pipe_blend_state *blend, case PIPE_BLENDFACTOR_CONST_ALPHA: /* fall through */ case PIPE_BLENDFACTOR_CONST_COLOR: /* We need the optional constA_reg register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = Ac, so term = A*Ac */ spe_fm(f, term1A_reg, fragA_reg, constA_reg); break; @@ -606,7 +625,7 @@ gen_blend(const struct pipe_blend_state *blend, case PIPE_BLENDFACTOR_INV_CONST_ALPHA: /* fall through */ case PIPE_BLENDFACTOR_INV_CONST_COLOR: /* We need the optional constA_reg register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = 1-Ac, so term = A*(1-Ac) = A-A*Ac */ /* fnms(a,b,c,d) computes a = d - b*c */ spe_fnms(f, term1A_reg, fragA_reg, constA_reg, fragA_reg); @@ -703,9 +722,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_CONST_COLOR: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* now, factor = (Rc,Gc,Bc), so term = (Rfb*Rc,Gfb*Gc,Bfb*Bc) */ spe_fm(f, term2R_reg, fbR_reg, constR_reg); spe_fm(f, term2G_reg, fbG_reg, constG_reg); @@ -713,7 +732,7 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_CONST_ALPHA: /* we'll need the optional constant alpha register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = (Ac,Ac,Ac), so term = (Rfb*Ac,Gfb*Ac,Bfb*Ac) */ spe_fm(f, term2R_reg, fbR_reg, constA_reg); spe_fm(f, term2G_reg, fbG_reg, constA_reg); @@ -721,9 +740,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_INV_CONST_COLOR: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* factor = (1-Rc,1-Gc,1-Bc), so term = (Rfb*(1-Rc),Gfb*(1-Gc),Bfb*(1-Bc)) * or term = (Rfb-Rfb*Rc, Gfb-Gfb*Gc, Bfb-Bfb*Bc) * fnms(a,b,c,d) computes a = d - b*c @@ -734,9 +753,9 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_INV_CONST_ALPHA: /* We need the optional constant color registers */ - setup_const_register(f, &constR_reg_set, &constR_reg, blend_color->color[0]); - setup_const_register(f, &constG_reg_set, &constG_reg, blend_color->color[1]); - setup_const_register(f, &constB_reg_set, &constB_reg, blend_color->color[2]); + setup_const_register(f, &constR_reg, blend_color->color[0]); + setup_const_register(f, &constG_reg, blend_color->color[1]); + setup_const_register(f, &constB_reg, blend_color->color[2]); /* factor = (1-Ac,1-Ac,1-Ac), so term = (Rfb*(1-Ac),Gfb*(1-Ac),Bfb*(1-Ac)) * or term = (Rfb-Rfb*Ac,Gfb-Gfb*Ac,Bfb-Bfb*Ac) * fnms(a,b,c,d) computes a = d - b*c @@ -806,7 +825,7 @@ gen_blend(const struct pipe_blend_state *blend, case PIPE_BLENDFACTOR_CONST_ALPHA: /* fall through */ case PIPE_BLENDFACTOR_CONST_COLOR: /* We need the optional constA_reg register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = Ac, so term = Afb*Ac */ spe_fm(f, term2A_reg, fbA_reg, constA_reg); break; @@ -814,7 +833,7 @@ gen_blend(const struct pipe_blend_state *blend, case PIPE_BLENDFACTOR_INV_CONST_ALPHA: /* fall through */ case PIPE_BLENDFACTOR_INV_CONST_COLOR: /* We need the optional constA_reg register */ - setup_const_register(f, &constA_reg_set, &constA_reg, blend_color->color[3]); + setup_const_register(f, &constA_reg, blend_color->color[3]); /* factor = 1-Ac, so term = Afb*(1-Ac) = Afb-Afb*Ac */ /* fnms(a,b,c,d) computes a = d - b*c */ spe_fnms(f, term2A_reg, fbA_reg, constA_reg, fbA_reg); @@ -910,11 +929,11 @@ gen_blend(const struct pipe_blend_state *blend, spe_release_register(f, tmp_reg); /* Free any optional registers that actually got used */ - release_const_register(f, &one_reg_set, one_reg); - release_const_register(f, &constR_reg_set, constR_reg); - release_const_register(f, &constG_reg_set, constG_reg); - release_const_register(f, &constB_reg_set, constB_reg); - release_const_register(f, &constA_reg_set, constA_reg); + release_const_register(f, one_reg); + release_const_register(f, constR_reg); + release_const_register(f, constG_reg); + release_const_register(f, constB_reg); + release_const_register(f, constA_reg); } @@ -1055,6 +1074,7 @@ gen_pack_colors(struct spe_function *f, spe_release_register(f, ba_reg); } + static void gen_colormask(struct spe_function *f, uint colormask, @@ -1067,10 +1087,10 @@ gen_colormask(struct spe_function *f, * are packed according to the given color format, not * necessarily RGBA... */ - unsigned int r_mask; - unsigned int g_mask; - unsigned int b_mask; - unsigned int a_mask; + uint r_mask; + uint g_mask; + uint b_mask; + uint a_mask; /* Calculate exactly where the bits for any particular color * end up, so we can mask them correctly. @@ -1111,11 +1131,13 @@ gen_colormask(struct spe_function *f, a_mask = 0; } - /* Get a temporary register to hold the mask that will be applied to the fragment */ + /* Get a temporary register to hold the mask that will be applied + * to the fragment + */ int colormask_reg = spe_allocate_available_register(f); - /* The actual mask we're going to use is an OR of the remaining R, G, B, and A - * masks. Load the result value into our temporary register. + /* The actual mask we're going to use is an OR of the remaining R, G, B, + * and A masks. Load the result value into our temporary register. */ spe_load_uint(f, colormask_reg, r_mask | g_mask | b_mask | a_mask); @@ -1135,7 +1157,9 @@ gen_colormask(struct spe_function *f, spe_release_register(f, colormask_reg); } -/* This function is annoyingly similar to gen_depth_test(), above, except + +/** + * This function is annoyingly similar to gen_depth_test(), above, except * that instead of comparing two varying values (i.e. fragment and buffer), * we're comparing a varying value with a static value. As such, we have * access to the Compare Immediate instructions where we don't in @@ -1146,16 +1170,20 @@ gen_colormask(struct spe_function *f, * * 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 (fragment_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 stencil_max_value, - unsigned int fragment_mask_reg, unsigned int fbS_reg, - unsigned int stencil_pass_reg) +gen_stencil_test(struct spe_function *f, + const struct pipe_stencil_state *state, + uint stencil_max_value, + int fragment_mask_reg, + int fbS_reg, + int stencil_pass_reg) { - /* Generate code that puts the set of passing fragments into the stencil_pass_reg - * register, taking into account whether each fragment was active to begin with. + /* Generate code that puts the set of passing fragments into the + * stencil_pass_reg register, taking into account whether each fragment + * was active to begin with. */ switch (state->func) { case PIPE_FUNC_EQUAL: @@ -1166,9 +1194,10 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, } else { /* stencil_pass = fragment_mask & ((s&mask) == (reference&mask)) */ - unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + uint 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_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); } @@ -1182,9 +1211,10 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, } else { /* stencil_pass = fragment_mask & ~((s&mask) == (reference&mask)) */ - unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + 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_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); } @@ -1198,9 +1228,10 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, } else { /* stencil_pass = fragment_mask & ((reference&mask) < (s & mask)) */ - unsigned int tmp_masked_stencil = spe_allocate_available_register(f); + 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_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); } @@ -1214,7 +1245,7 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, * 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); + 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); @@ -1222,8 +1253,8 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, } 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); + int tmp_reg = spe_allocate_available_register(f); + 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); @@ -1237,14 +1268,16 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, if (state->value_mask == stencil_max_value) { /* stencil_pass = fragment_mask & (reference >= s) * = fragment_mask & ~(s > reference) */ - spe_compare_greater_uint(f, stencil_pass_reg, fbS_reg, state->ref_value); + 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); + 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_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); } @@ -1255,7 +1288,7 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, /* stencil_pass = fragment_mask & (reference <= s) ] * = fragment_mask & ~(reference > s) */ /* As above, we have to do this by loading a register */ - unsigned int tmp_reg = spe_allocate_available_register(f); + 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); @@ -1263,8 +1296,8 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, } 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); + int tmp_reg = spe_allocate_available_register(f); + 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); @@ -1290,7 +1323,9 @@ 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, @@ -1302,9 +1337,12 @@ gen_stencil_test(struct spe_function *f, const struct pipe_stencil_state *state, * in the stencil buffer - in other words, it should be usable as a mask. */ static void -gen_stencil_values(struct spe_function *f, unsigned int stencil_op, - unsigned int stencil_ref_value, unsigned int stencil_max_value, - unsigned int fbS_reg, unsigned int newS_reg) +gen_stencil_values(struct spe_function *f, + uint stencil_op, + uint stencil_ref_value, + uint stencil_max_value, + int fbS_reg, + int newS_reg) { /* The code below assumes that newS_reg and fbS_reg are not the same * register; if they can be, the calculations below will have to use @@ -1346,7 +1384,7 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, case PIPE_STENCIL_OP_INCR: { /* newS = (s == max ? max : s + 1) */ - unsigned int equals_reg = spe_allocate_available_register(f); + int equals_reg = spe_allocate_available_register(f); spe_compare_equal_uint(f, equals_reg, fbS_reg, stencil_max_value); /* Add Word Immediate computes rT = rA + 10-bit signed immediate */ @@ -1359,7 +1397,7 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, } case PIPE_STENCIL_OP_DECR: { /* newS = (s == 0 ? 0 : s - 1) */ - unsigned int equals_reg = spe_allocate_available_register(f); + int equals_reg = spe_allocate_available_register(f); spe_compare_equal_uint(f, equals_reg, fbS_reg, 0); /* Add Word Immediate with a (-1) value works */ @@ -1397,7 +1435,8 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, } -/* 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, @@ -1412,13 +1451,15 @@ gen_stencil_values(struct spe_function *f, unsigned int stencil_op, * and released by the corresponding spe_release_register_set() call. */ static void -gen_get_stencil_values(struct spe_function *f, const struct pipe_stencil_state *stencil, - const unsigned int depth_enabled, - unsigned int fbS_reg, - unsigned int *fail_reg, unsigned int *zfail_reg, - unsigned int *zpass_reg) +gen_get_stencil_values(struct spe_function *f, + const struct pipe_stencil_state *stencil, + const uint depth_enabled, + int fbS_reg, + int *fail_reg, + int *zfail_reg, + int *zpass_reg) { - unsigned zfail_op; + uint zfail_op; /* Stenciling had better be enabled here */ ASSERT(stencil->enabled); @@ -1480,7 +1521,8 @@ gen_get_stencil_values(struct spe_function *f, const struct pipe_stencil_state * } } -/* 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. */ @@ -1494,7 +1536,7 @@ gen_stencil_depth_test(struct spe_function *f, /* True if we've generated code that could require writeback to the * depth and/or stencil buffers */ - boolean modified_buffers = false; + boolean modified_buffers = FALSE; boolean need_to_calculate_stencil_values; boolean need_to_writemask_stencil_values; @@ -1504,11 +1546,11 @@ gen_stencil_depth_test(struct spe_function *f, /* Registers. We may or may not actually allocate these, depending * on whether the state values indicate that we need them. */ - unsigned int stencil_pass_reg, stencil_fail_reg; - unsigned int stencil_fail_values, stencil_pass_depth_fail_values, stencil_pass_depth_pass_values; - unsigned int stencil_writemask_reg; - unsigned int zmask_reg; - unsigned int newS_reg; + int stencil_pass_reg, stencil_fail_reg; + int stencil_fail_values, stencil_pass_depth_fail_values, stencil_pass_depth_pass_values; + int stencil_writemask_reg; + int zmask_reg; + int newS_reg; /* Stenciling is quite complex: up to six different configurable stencil * operations/calculations can be required (three each for front-facing @@ -1555,27 +1597,27 @@ gen_stencil_depth_test(struct spe_function *f, if (stencil->fail_op == PIPE_STENCIL_OP_KEEP && stencil->zfail_op == PIPE_STENCIL_OP_KEEP && stencil->zpass_op == PIPE_STENCIL_OP_KEEP) { - need_to_calculate_stencil_values = false; - need_to_writemask_stencil_values = false; + need_to_calculate_stencil_values = FALSE; + need_to_writemask_stencil_values = FALSE; } else if (stencil->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; + need_to_calculate_stencil_values = FALSE; + need_to_writemask_stencil_values = FALSE; } else if (stencil->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. */ - need_to_calculate_stencil_values = true; - need_to_writemask_stencil_values = false; + need_to_calculate_stencil_values = TRUE; + need_to_writemask_stencil_values = FALSE; } else { /* The general case: calculate, mask, and write */ - need_to_calculate_stencil_values = true; - need_to_writemask_stencil_values = true; + need_to_calculate_stencil_values = TRUE; + need_to_writemask_stencil_values = TRUE; /* While we're here, generate code that calculates what the * writemask should be. If backface stenciling is enabled, @@ -1633,7 +1675,9 @@ 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, facing == CELL_FACING_FRONT ? "Computing front-facing stencil values" : "Computing back-facing stencil values"); + spe_comment(f, 0, facing == CELL_FACING_FRONT + ? "Computing front-facing stencil values" + : "Computing back-facing stencil values"); gen_get_stencil_values(f, stencil, dsa->depth.enabled, fbS_reg, &stencil_fail_values, &stencil_pass_depth_fail_values, &stencil_pass_depth_pass_values); @@ -1652,7 +1696,8 @@ gen_stencil_depth_test(struct spe_function *f, 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); + modified_buffers |= gen_depth_test(f, dsa, mask_reg, fragZ_reg, + fbZ_reg, zmask_reg); } if (need_to_calculate_stencil_values) { @@ -1675,7 +1720,7 @@ gen_stencil_depth_test(struct spe_function *f, 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; + modified_buffers = TRUE; } /* Same for the stencil pass/depth fail values. If this calculation @@ -1689,14 +1734,17 @@ gen_stencil_depth_test(struct spe_function *f, * depth passing mask. Note that zmask_reg *must* have been * set above if we're here. */ - unsigned int stencil_pass_depth_fail_mask = spe_allocate_available_register(f); + uint 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_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; + modified_buffers = TRUE; } /* Same for the stencil pass/depth pass mask. Note that we @@ -1707,7 +1755,7 @@ gen_stencil_depth_test(struct spe_function *f, */ if (stencil_pass_depth_pass_values != fbS_reg) { if (dsa->depth.enabled) { - unsigned int stencil_pass_depth_pass_mask = spe_allocate_available_register(f); + uint 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); @@ -1719,7 +1767,7 @@ gen_stencil_depth_test(struct spe_function *f, 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; + modified_buffers = TRUE; } /* Almost done. If we need to writemask, do it now, leaving the @@ -1749,7 +1797,7 @@ gen_stencil_depth_test(struct spe_function *f, spe_comment(f, 0, "Releasing stencil register set"); spe_release_register_set(f); - /* Return true if we could have modified the stencil and/or + /* Return TRUE if we could have modified the stencil and/or * depth buffers. */ return modified_buffers; @@ -1757,6 +1805,200 @@ 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, + int mask_reg, + int depth_tile_reg, + int quad_offset_reg, + int fragZ_reg) + +{ + const enum pipe_format zs_format = cell->framebuffer.zsbuf->format; + boolean write_depth_stencil; + + /* framebuffer's combined z/stencil values register */ + int fbZS_reg = spe_allocate_available_register(f); + + /* Framebufer Z values register */ + int fbZ_reg = spe_allocate_available_register(f); + + /* Framebuffer stencil values register (may not be used) */ + int fbS_reg = spe_allocate_available_register(f); + + /* 24-bit mask register (may not be used) */ + int zmask_reg = spe_allocate_available_register(f); + + /** + * The following code: + * 1. fetch quad of packed Z/S values from the framebuffer tile. + * 2. extract the separate the Z and S values from packed values + * 3. convert fragment Z values from float in [0,1] to 32/24/16-bit ints + * + * The instructions for doing this are interleaved for better performance. + */ + spe_comment(f, 0, "Fetch Z/stencil quad from tile"); + + switch(zs_format) { + case PIPE_FORMAT_S8Z24_UNORM: /* fall through */ + case PIPE_FORMAT_X8Z24_UNORM: + /* prepare mask to extract Z vals from ZS vals */ + spe_load_uint(f, zmask_reg, 0x00ffffff); + + /* convert fragment Z from [0,1] to 32-bit ints */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + + /* Load: fbZS_reg = memory[depth_tile_reg + offset_reg] */ + spe_lqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); + + /* right shift 32-bit fragment Z to 24 bits */ + spe_rotmi(f, fragZ_reg, fragZ_reg, -8); + + /* extract 24-bit Z values from ZS values by masking */ + spe_and(f, fbZ_reg, fbZS_reg, zmask_reg); + + /* extract 8-bit stencil values by shifting */ + spe_rotmi(f, fbS_reg, fbZS_reg, -24); + break; + + case PIPE_FORMAT_Z24S8_UNORM: /* fall through */ + case PIPE_FORMAT_Z24X8_UNORM: + /* convert fragment Z from [0,1] to 32-bit ints */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + + /* Load: fbZS_reg = memory[depth_tile_reg + offset_reg] */ + spe_lqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); + + /* right shift 32-bit fragment Z to 24 bits */ + spe_rotmi(f, fragZ_reg, fragZ_reg, -8); + + /* extract 24-bit Z values from ZS values by shifting */ + spe_rotmi(f, fbZ_reg, fbZS_reg, -8); + + /* extract 8-bit stencil values by masking */ + spe_and_uint(f, fbS_reg, fbZS_reg, 0x000000ff); + break; + + case PIPE_FORMAT_Z32_UNORM: + /* Load: fbZ_reg = memory[depth_tile_reg + offset_reg] */ + spe_lqx(f, fbZ_reg, depth_tile_reg, quad_offset_reg); + + /* convert fragment Z from [0,1] to 32-bit ints */ + spe_cfltu(f, fragZ_reg, fragZ_reg, 32); + + /* No stencil, so can't do anything there */ + break; + + case PIPE_FORMAT_Z16_UNORM: + /* XXX This code for 16bpp Z is broken! */ + + /* Load: fbZS_reg = memory[depth_tile_reg + offset_reg] */ + spe_lqx(f, fbZS_reg, depth_tile_reg, quad_offset_reg); + + /* Copy over 4 32-bit values */ + spe_move(f, fbZ_reg, fbZS_reg); + + /* convert Z from [0,1] to 16-bit ints */ + 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 >= 0); + 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 >= 0); + 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 */ + spe_release_register(f, fbZS_reg); + spe_release_register(f, fbZ_reg); + spe_release_register(f, fbS_reg); + spe_release_register(f, zmask_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. @@ -1782,7 +2024,9 @@ gen_stencil_depth_test(struct spe_function *f, * the fragment ops appended. */ void -cell_gen_fragment_function(struct cell_context *cell, const uint facing, struct spe_function *f) +cell_gen_fragment_function(struct cell_context *cell, + const uint facing, + struct spe_function *f) { const struct pipe_depth_stencil_alpha_state *dsa = cell->depth_stencil; const struct pipe_blend_state *blend = cell->blend; @@ -1809,12 +2053,13 @@ cell_gen_fragment_function(struct cell_context *cell, const uint facing, struct 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); + spe_print_code(f, TRUE); spe_indent(f, 8); - spe_comment(f, -4, facing == CELL_FACING_FRONT ? "Begin front-facing per-fragment ops": "Begin back-facing per-fragment ops"); + spe_comment(f, -4, facing == CELL_FACING_FRONT + ? "Begin front-facing per-fragment ops" + : "Begin back-facing per-fragment ops"); } spe_allocate_register(f, x_reg); @@ -1830,7 +2075,6 @@ cell_gen_fragment_function(struct cell_context *cell, const uint facing, struct 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 */ { @@ -1855,177 +2099,14 @@ cell_gen_fragment_function(struct cell_context *cell, const uint facing, struct 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, "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] */ - /* 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 */ - - 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, @@ -2089,7 +2170,6 @@ cell_gen_fragment_function(struct cell_context *cell, const uint facing, struct 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) { |