diff options
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c | 41 | ||||
| -rw-r--r-- | src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h | 8 | ||||
| -rw-r--r-- | src/gallium/drivers/cell/ppu/cell_gen_fragment.c | 546 |
3 files changed, 377 insertions, 218 deletions
diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c index 870ae802c52..12e0826fb9b 100644 --- a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c +++ b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c @@ -384,7 +384,7 @@ void spe_release_func(struct spe_function *p) /** - * Alloate a SPE register. + * Allocate a SPE register. * \return register index or -1 if none left. */ int spe_allocate_available_register(struct spe_function *p) @@ -646,5 +646,44 @@ spe_splat_word(struct spe_function *p, unsigned rT, unsigned rA, int word) } } +/* For each 32-bit float element of rA and rB, choose the smaller of the + * two, compositing them into the rT register. + * + * The Float Compare Greater Than (fcgt) instruction will put 1s into + * compare_reg where rA > rB, and 0s where rA <= rB. + * + * Then the Select Bits (selb) instruction will take bits from rA where + * compare_reg is 0, and from rB where compare_reg is 1; i.e., from rA + * where rA <= rB and from rB where rB > rA, which is exactly the + * "min" operation. + * + * The compare_reg could in many cases be the same as rT, unless + * rT == rA || rt == rB. But since this is common in constructions + * like "x = min(x, a)", we always allocate a new register to be safe. + */ +void +spe_float_min(struct spe_function *p, unsigned int rT, unsigned int rA, unsigned int rB) +{ + unsigned int compare_reg = spe_allocate_available_register(p); + spe_fcgt(p, compare_reg, rA, rB); + spe_selb(p, rT, rA, rB, compare_reg); + spe_release_register(p, compare_reg); +} + +/* For each 32-bit float element of rA and rB, choose the greater of the + * two, compositing them into the rT register. + * + * The logic is similar to that of spe_float_min() above; the only + * difference is that the registers on spe_selb() have been reversed, + * so that the larger of the two is selected instead of the smaller. + */ +void +spe_float_max(struct spe_function *p, unsigned int rT, unsigned int rA, unsigned int rB) +{ + unsigned int compare_reg = spe_allocate_available_register(p); + spe_fcgt(p, compare_reg, rA, rB); + spe_selb(p, rT, rB, rA, compare_reg); + spe_release_register(p, compare_reg); +} #endif /* GALLIUM_CELL */ diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h index 25790452325..4ef05ea27d1 100644 --- a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h +++ b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.h @@ -322,6 +322,14 @@ spe_zero(struct spe_function *p, unsigned rT); extern void spe_splat_word(struct spe_function *p, unsigned rT, unsigned rA, int word); +/** rT = float min(rA, rB) */ +extern void +spe_float_min(struct spe_function *p, unsigned rT, unsigned rA, unsigned rB); + +/** rT = float max(rA, rB) */ +extern void +spe_float_max(struct spe_function *p, unsigned rT, unsigned rA, unsigned rB); + /* Floating-point instructions */ diff --git a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c index 2c80dd712e6..9d25e820ad9 100644 --- a/src/gallium/drivers/cell/ppu/cell_gen_fragment.c +++ b/src/gallium/drivers/cell/ppu/cell_gen_fragment.c @@ -229,35 +229,26 @@ gen_alpha_test(const struct pipe_depth_stencil_alpha_state *dsa, spe_release_register(f, amask_reg); } -/* This is a convenient and oft-used sequence. It chooses - * the smaller of each element of reg1 and reg2, and combines them - * into the result register, as follows: - * - * The Float Compare Greater Than (fcgt) instruction will put - * 1s into compare_reg where reg1 > reg2, and 0s where reg1 <= reg2. - * - * Then the Select Bits (selb) instruction will take bits from - * reg1 where compare_reg is 0, and from reg2 where compare_reg is - * 1. Ergo, result_reg will have the bits from reg1 where reg1 <= reg2, - * and the bits from reg2 where reg1 > reg2, which is exactly the - * MIN operation. +/* 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. */ -#define FLOAT_VECTOR_MIN(f, result_reg, reg1, reg2) {\ - int compare_reg = spe_allocate_available_register(f); \ - spe_fcgt(f, compare_reg, reg1, reg2); \ - spe_selb(f, result_reg, reg1, reg2, compare_reg); \ - spe_release_register(f, compare_reg); \ +static inline void +setup_const_register(struct spe_function *f, boolean *is_already_set, unsigned int *r, float value) +{ + if (*is_already_set) return; + *r = spe_allocate_available_register(f); + spe_load_float(f, *r, value); + *is_already_set = true; } -/* The FLOAT_VECTOR_MAX sequence is similar to the FLOAT_VECTOR_MIN - * sequence above, except that the registers specified when selecting - * bits are reversed. - */ -#define FLOAT_VECTOR_MAX(f, result_reg, reg1, reg2) {\ - int compare_reg = spe_allocate_available_register(f); \ - spe_fcgt(f, compare_reg, reg1, reg2); \ - spe_selb(f, result_reg, reg2, reg1, compare_reg); \ - spe_release_register(f, compare_reg); \ +static inline void +release_const_register(struct spe_function *f, boolean *is_already_set, unsigned int r) +{ + if (!*is_already_set) return; + spe_release_register(f, r); + *is_already_set = false; } /** @@ -294,51 +285,15 @@ gen_blend(const struct pipe_blend_state *blend, int tmp_reg = spe_allocate_available_register(f); - /* These values might or might not eventually get put into - * registers. We avoid allocating them and setting them until - * they're actually needed; then we avoid setting them more than - * once, and release them at the end of code generation. + /* Optional constant registers we might or might not end up using; + * if we do use them, make sure we only allocate them once by + * keeping a flag on each one. */ - boolean one_reg_set = false; - int one_reg; -#define SET_ONE_REG_IF_UNSET(f) if (!one_reg_set) {\ - one_reg = spe_allocate_available_register(f); \ - spe_load_float(f, one_reg, 1.0f); \ - one_reg_set = true; \ -} -#define RELEASE_ONE_REG_IF_USED(f) if (one_reg_set) {\ - spe_release_register(f, one_reg); \ -} - - boolean const_color_set = false; - int constR_reg, constG_reg, constB_reg; -#define SET_CONST_COLOR_IF_UNSET(f, blend_color) if (!const_color_set) {\ - constR_reg = spe_allocate_available_register(f); \ - constG_reg = spe_allocate_available_register(f); \ - constG_reg = spe_allocate_available_register(f); \ - spe_load_float(f, constR_reg, blend_color->color[0]); \ - spe_load_float(f, constG_reg, blend_color->color[1]); \ - spe_load_float(f, constB_reg, blend_color->color[2]); \ - const_color_set = true;\ -} -#define RELEASE_CONST_COLOR_IF_USED(f) if (const_color_set) {\ - spe_release_register(f, constR_reg); \ - spe_release_register(f, constG_reg); \ - spe_release_register(f, constB_reg); \ -} - - boolean const_alpha_set = false; - int constA_reg; -#define SET_CONST_ALPHA_IF_UNSET(f, blend_color) if (!const_alpha_set) {\ - constA_reg = spe_allocate_available_register(f); \ - spe_load_float(f, constA_reg, blend_color->color[3]); \ - const_alpha_set = true; \ -} -#define RELEASE_CONST_ALPHA_IF_USED(f) if (const_alpha_set) {\ - spe_release_register(f, constA_reg); \ -} - - /* Real code starts here */ + 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; ASSERT(blend->blend_enable); @@ -419,10 +374,11 @@ gen_blend(const struct pipe_blend_state *blend, spe_release_register(f, mask_reg); } - /* * Compute Src RGB terms. We're actually looking for the value - * of (the appropriate RGB factors) * (the incoming source RGB color). + * of (the appropriate RGB factors) * (the incoming source RGB color), + * because in some cases (like PIPE_BLENDFACTOR_ONE and + * PIPE_BLENDFACTOR_ZERO) we can avoid doing unnecessary math. */ switch (blend->rgb_src_factor) { case PIPE_BLENDFACTOR_ONE: @@ -450,18 +406,13 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term1B_reg, fragB_reg, fragA_reg); break; case PIPE_BLENDFACTOR_INV_SRC_COLOR: - /* factors = (1-R,1-G,1-B), so term = (R*(1-R), G*(1-G), B*(1-B)) */ - /* we'll need the optional constant {1,1,1,1} register */ - SET_ONE_REG_IF_UNSET(f) - /* tmp = 1 - R */ - spe_fs(f, tmp_reg, one_reg, fragR_reg); - /* term = R * tmp */ - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - /* repeat for G and B */ - spe_fs(f, tmp_reg, one_reg, fragG_reg); - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fs(f, tmp_reg, one_reg, fragB_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + /* factors = (1-R,1-G,1-B), so term = (R*(1-R), G*(1-G), B*(1-B)) + * or in other words term = (R-R*R, G-G*G, B-B*B) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term1R_reg, fragR_reg, fragR_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, fragG_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, fragB_reg, fragB_reg); break; case PIPE_BLENDFACTOR_DST_COLOR: /* factors = (Rfb,Gfb,Bfb), so term = (R*Rfb, G*Gfb, B*Bfb) */ @@ -470,30 +421,22 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term1B_reg, fragB_reg, fbB_reg); break; case PIPE_BLENDFACTOR_INV_DST_COLOR: - /* factors = (1-Rfb,1-Gfb,1-Bfb), so term = (R*(1-Rfb),G*(1-Gfb),B*(1-Bfb)) */ - /* we'll need the optional constant {1,1,1,1} register */ - SET_ONE_REG_IF_UNSET(f) - /* tmp = 1 - Rfb */ - spe_fs(f, tmp_reg, one_reg, fbR_reg); - /* term = R * tmp */ - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - /* repeat for G and B */ - spe_fs(f, tmp_reg, one_reg, fbG_reg); - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fs(f, tmp_reg, one_reg, fbB_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + /* factors = (1-Rfb,1-Gfb,1-Bfb), so term = (R*(1-Rfb),G*(1-Gfb),B*(1-Bfb)) + * or term = (R-R*Rfb, G-G*Gfb, B-B*Bfb) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term1R_reg, fragR_reg, fbR_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, fbG_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, fbB_reg, fragB_reg); break; case PIPE_BLENDFACTOR_INV_SRC_ALPHA: - /* factors = (1-A,1-A,1-A), so term = (R*(1-A),G*(1-A),B*(1-A)) */ - /* we'll need the optional constant {1,1,1,1} register */ - SET_ONE_REG_IF_UNSET(f) - /* tmp = 1 - A */ - spe_fs(f, tmp_reg, one_reg, fragA_reg); - /* term = R * tmp */ - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - /* repeat for G and B with the same (1-A) factor */ - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + /* factors = (1-A,1-A,1-A), so term = (R*(1-A),G*(1-A),B*(1-A)) + * or term = (R-R*A,G-G*A,B-B*A) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term1R_reg, fragR_reg, fragA_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, fragA_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, fragA_reg, fragB_reg); break; case PIPE_BLENDFACTOR_DST_ALPHA: /* factors = (Afb, Afb, Afb), so term = (R*Afb, G*Afb, B*Afb) */ @@ -502,19 +445,19 @@ gen_blend(const struct pipe_blend_state *blend, spe_fm(f, term1B_reg, fragB_reg, fbA_reg); break; case PIPE_BLENDFACTOR_INV_DST_ALPHA: - /* factors = (1-Afb, 1-Afb, 1-Afb), so term = (R*(1-Afb),G*(1-Afb),B*(1-Afb)) */ - /* we'll need the optional constant {1,1,1,1} register */ - SET_ONE_REG_IF_UNSET(f) - /* tmp = 1 - A */ - spe_fs(f, tmp_reg, one_reg, fbA_reg); - /* term = R * tmp, G*tmp, and B*tmp */ - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + /* factors = (1-Afb, 1-Afb, 1-Afb), so term = (R*(1-Afb),G*(1-Afb),B*(1-Afb)) + * or term = (R-R*Afb,G-G*Afb,b-B*Afb) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term1R_reg, fragR_reg, fbA_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, fbA_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, fbA_reg, fragB_reg); break; case PIPE_BLENDFACTOR_CONST_COLOR: - /* We'll need the optional blend color registers */ - SET_CONST_COLOR_IF_UNSET(f,blend_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]); /* 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); @@ -522,55 +465,61 @@ gen_blend(const struct pipe_blend_state *blend, break; case PIPE_BLENDFACTOR_CONST_ALPHA: /* we'll need the optional constant alpha register */ - SET_CONST_ALPHA_IF_UNSET(f, blend_color) + setup_const_register(f, &constA_reg_set, &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); spe_fm(f, term1B_reg, fragB_reg, constA_reg); break; case PIPE_BLENDFACTOR_INV_CONST_COLOR: - /* We need both the optional {1,1,1,1} register, and the optional - * constant color registers + /* 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]); + /* 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 */ - SET_ONE_REG_IF_UNSET(f) - SET_CONST_COLOR_IF_UNSET(f, blend_color) - /* factor = (1-Rc,1-Gc,1-Bc), so term = (R*(1-Rc),G*(1-Gc),B*(1-Bc)) */ - spe_fs(f, tmp_reg, one_reg, constR_reg); - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - spe_fs(f, tmp_reg, one_reg, constG_reg); - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fs(f, tmp_reg, one_reg, constB_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + spe_fnms(f, term1R_reg, fragR_reg, constR_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, constG_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, constB_reg, fragB_reg); break; case PIPE_BLENDFACTOR_INV_CONST_ALPHA: - /* We need the optional {1,1,1,1} register and the optional - * constant alpha register + /* 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]); + /* 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 */ - SET_ONE_REG_IF_UNSET(f) - SET_CONST_ALPHA_IF_UNSET(f, blend_color) - /* factor = (1-Ac,1-Ac,1-Ac), so term = (R*(1-Ac),G*(1-Ac),B*(1-Ac)) */ - spe_fs(f, tmp_reg, one_reg, constA_reg); - spe_fm(f, term1R_reg, fragR_reg, tmp_reg); - spe_fm(f, term1G_reg, fragG_reg, tmp_reg); - spe_fm(f, term1B_reg, fragB_reg, tmp_reg); + spe_fnms(f, term1R_reg, fragR_reg, constA_reg, fragR_reg); + spe_fnms(f, term1G_reg, fragG_reg, constA_reg, fragG_reg); + spe_fnms(f, term1B_reg, fragB_reg, constA_reg, fragB_reg); break; case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: /* We'll need the optional {1,1,1,1} register */ - SET_ONE_REG_IF_UNSET(f) + setup_const_register(f, &one_reg_set, &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) + * as long as a is positive), but then we'd have to do three + * spe_float_min() functions instead of one, so this is simpler. */ /* tmp = 1 - Afb */ spe_fs(f, tmp_reg, one_reg, fbA_reg); /* tmp = min(A,tmp) */ - FLOAT_VECTOR_MIN(f, tmp_reg, fragA_reg, tmp_reg) + spe_float_min(f, tmp_reg, fragA_reg, tmp_reg); /* term = R*tmp */ spe_fm(f, term1R_reg, fragR_reg, tmp_reg); spe_fm(f, term1G_reg, fragG_reg, tmp_reg); spe_fm(f, term1B_reg, fragB_reg, tmp_reg); break; - /* non-OpenGL cases? */ + /* These are special D3D cases involving a second color output + * from the fragment shader. I'm not sure we can support them + * yet... XXX + */ case PIPE_BLENDFACTOR_SRC1_COLOR: case PIPE_BLENDFACTOR_SRC1_ALPHA: case PIPE_BLENDFACTOR_INV_SRC1_COLOR: @@ -581,132 +530,293 @@ gen_blend(const struct pipe_blend_state *blend, } /* - * Compute Src Alpha term + * Compute Src Alpha term. Like the above, we're looking for + * the full term A*factor, not just the factor itself, because + * in many cases we can avoid doing unnecessary multiplies. */ switch (blend->alpha_src_factor) { + case PIPE_BLENDFACTOR_ZERO: + /* factor = 0, so term = 0 */ + spe_load_float(f, term1A_reg, 0.0f); + break; + + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: /* fall through */ case PIPE_BLENDFACTOR_ONE: + /* factor = 1, so term = A */ spe_move(f, term1A_reg, fragA_reg); break; + case PIPE_BLENDFACTOR_SRC_COLOR: + /* factor = A, so term = A*A */ spe_fm(f, term1A_reg, fragA_reg, fragA_reg); break; case PIPE_BLENDFACTOR_SRC_ALPHA: spe_fm(f, term1A_reg, fragA_reg, fragA_reg); break; - /* XXX more cases */ + + case PIPE_BLENDFACTOR_INV_SRC_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_INV_SRC_COLOR: + /* factor = 1-A, so term = A*(1-A) = A-A*A */ + /* fnms(a,b,c,d) computes a = d - b*c */ + spe_fnms(f, term1A_reg, fragA_reg, fragA_reg, fragA_reg); + break; + + case PIPE_BLENDFACTOR_DST_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_DST_COLOR: + /* factor = Afb, so term = A*Afb */ + spe_fm(f, term1A_reg, fragA_reg, fbA_reg); + break; + + case PIPE_BLENDFACTOR_INV_DST_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_INV_DST_COLOR: + /* factor = 1-Afb, so term = A*(1-Afb) = A - A*Afb */ + /* fnms(a,b,c,d) computes a = d - b*c */ + spe_fnms(f, term1A_reg, fragA_reg, fbA_reg, fragA_reg); + break; + + 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]); + /* factor = Ac, so term = A*Ac */ + spe_fm(f, term1A_reg, fragA_reg, constA_reg); + break; + + 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]); + /* 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); + break; + + /* These are special D3D cases involving a second color output + * from the fragment shader. I'm not sure we can support them + * yet... XXX + */ + case PIPE_BLENDFACTOR_SRC1_COLOR: + case PIPE_BLENDFACTOR_SRC1_ALPHA: + case PIPE_BLENDFACTOR_INV_SRC1_COLOR: + case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: default: ASSERT(0); } /* - * Compute Dest RGB terms + * Compute Dest RGB term. Like the above, we're looking for + * the full term (Rfb,Gfb,Bfb)*(factor), not just the factor itself, because + * in many cases we can avoid doing unnecessary multiplies. */ switch (blend->rgb_dst_factor) { case PIPE_BLENDFACTOR_ONE: + /* factors = (1,1,1), so term = (Rfb,Gfb,Bfb) */ spe_move(f, term2R_reg, fbR_reg); spe_move(f, term2G_reg, fbG_reg); spe_move(f, term2B_reg, fbB_reg); break; case PIPE_BLENDFACTOR_ZERO: - spe_zero(f, term2R_reg); - spe_zero(f, term2G_reg); - spe_zero(f, term2B_reg); + /* factor s= (0,0,0), so term = (0,0,0) */ + spe_load_float(f, term2R_reg, 0.0f); + spe_load_float(f, term2G_reg, 0.0f); + spe_load_float(f, term2B_reg, 0.0f); break; case PIPE_BLENDFACTOR_SRC_COLOR: + /* factors = (R,G,B), so term = (R*Rfb, G*Gfb, B*Bfb) */ spe_fm(f, term2R_reg, fbR_reg, fragR_reg); spe_fm(f, term2G_reg, fbG_reg, fragG_reg); spe_fm(f, term2B_reg, fbB_reg, fragB_reg); break; + case PIPE_BLENDFACTOR_INV_SRC_COLOR: + /* factors = (1-R,1-G,1-B), so term = (Rfb*(1-R), Gfb*(1-G), Bfb*(1-B)) + * or in other words term = (Rfb-Rfb*R, Gfb-Gfb*G, Bfb-Bfb*B) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term2R_reg, fragR_reg, fbR_reg, fbR_reg); + spe_fnms(f, term2G_reg, fragG_reg, fbG_reg, fbG_reg); + spe_fnms(f, term2B_reg, fragB_reg, fbB_reg, fbB_reg); + break; case PIPE_BLENDFACTOR_SRC_ALPHA: + /* factors = (A,A,A), so term = (Rfb*A, Gfb*A, Bfb*A) */ spe_fm(f, term2R_reg, fbR_reg, fragA_reg); spe_fm(f, term2G_reg, fbG_reg, fragA_reg); spe_fm(f, term2B_reg, fbB_reg, fragA_reg); break; case PIPE_BLENDFACTOR_INV_SRC_ALPHA: -#if 0 - /* one = {1.0, 1.0, 1.0, 1.0} */ - if (!one_reg_set) { - one_reg = spe_allocate_available_register(f); - spe_load_float(f, one_reg, 1.0f); - one_reg_set = true; - } - /* tmp = one - fragA */ - spe_fs(f, tmp_reg, one_reg, fragA_reg); - /* term = fb * tmp */ - spe_fm(f, term2R_reg, fbR_reg, tmp_reg); - spe_fm(f, term2G_reg, fbG_reg, tmp_reg); - spe_fm(f, term2B_reg, fbB_reg, tmp_reg); -#else - /* Compute: term2x = fbx * (1.0 - fragA) - * Which is: term2x = fbx - fbx * fragA - * Use fnms t,a,b,c which computes t=c-a*b - */ + /* factors = (1-A,1-A,1-A) so term = (Rfb-Rfb*A,Gfb-Gfb*A,Bfb-Bfb*A) */ + /* fnms(a,b,c,d) computes a = d - b*c */ spe_fnms(f, term2R_reg, fbR_reg, fragA_reg, fbR_reg); spe_fnms(f, term2G_reg, fbG_reg, fragA_reg, fbG_reg); spe_fnms(f, term2B_reg, fbB_reg, fragA_reg, fbB_reg); -#endif break; - /* XXX more cases */ - // GL_ONE_MINUS_SRC_COLOR - // GL_DST_COLOR - // GL_ONE_MINUS_DST_COLOR - // GL_DST_ALPHA - // GL_CONSTANT_COLOR - // GL_ONE_MINUS_CONSTANT_COLOR - // GL_CONSTANT_ALPHA - // GL_ONE_MINUS_CONSTANT_ALPHA + case PIPE_BLENDFACTOR_DST_COLOR: + /* factors = (Rfb,Gfb,Bfb), so term = (Rfb*Rfb, Gfb*Gfb, Bfb*Bfb) */ + spe_fm(f, term2R_reg, fbR_reg, fbR_reg); + spe_fm(f, term2G_reg, fbG_reg, fbG_reg); + spe_fm(f, term2B_reg, fbB_reg, fbB_reg); + break; + case PIPE_BLENDFACTOR_INV_DST_COLOR: + /* factors = (1-Rfb,1-Gfb,1-Bfb), so term = (Rfb*(1-Rfb),Gfb*(1-Gfb),Bfb*(1-Bfb)) + * or term = (Rfb-Rfb*Rfb, Gfb-Gfb*Gfb, Bfb-Bfb*Bfb) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term2R_reg, fbR_reg, fbR_reg, fbR_reg); + spe_fnms(f, term2G_reg, fbG_reg, fbG_reg, fbG_reg); + spe_fnms(f, term2B_reg, fbB_reg, fbB_reg, fbB_reg); + break; + + case PIPE_BLENDFACTOR_DST_ALPHA: + /* factors = (Afb, Afb, Afb), so term = (Rfb*Afb, Gfb*Afb, Bfb*Afb) */ + spe_fm(f, term2R_reg, fbR_reg, fbA_reg); + spe_fm(f, term2G_reg, fbG_reg, fbA_reg); + spe_fm(f, term2B_reg, fbB_reg, fbA_reg); + break; + case PIPE_BLENDFACTOR_INV_DST_ALPHA: + /* factors = (1-Afb, 1-Afb, 1-Afb), so term = (Rfb*(1-Afb),Gfb*(1-Afb),Bfb*(1-Afb)) + * or term = (Rfb-Rfb*Afb,Gfb-Gfb*Afb,Bfb-Bfb*Afb) + * fnms(a,b,c,d) computes a = d - b*c + */ + spe_fnms(f, term2R_reg, fbR_reg, fbA_reg, fbR_reg); + spe_fnms(f, term2G_reg, fbG_reg, fbA_reg, fbG_reg); + spe_fnms(f, term2B_reg, fbB_reg, fbA_reg, fbB_reg); + 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]); + /* 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); + spe_fm(f, term2B_reg, fbB_reg, constB_reg); + 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]); + /* 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); + spe_fm(f, term2B_reg, fbB_reg, constA_reg); + 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]); + /* 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 + */ + spe_fnms(f, term2R_reg, fbR_reg, constR_reg, fbR_reg); + spe_fnms(f, term2G_reg, fbG_reg, constG_reg, fbG_reg); + spe_fnms(f, term2B_reg, fbB_reg, constB_reg, fbB_reg); + 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]); + /* 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 + */ + spe_fnms(f, term2R_reg, fbR_reg, constA_reg, fbR_reg); + spe_fnms(f, term2G_reg, fbG_reg, constA_reg, fbG_reg); + spe_fnms(f, term2B_reg, fbB_reg, constA_reg, fbB_reg); + break; + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: /* not supported for dest RGB */ + ASSERT(0); + break; + + /* These are special D3D cases involving a second color output + * from the fragment shader. I'm not sure we can support them + * yet... XXX + */ + case PIPE_BLENDFACTOR_SRC1_COLOR: + case PIPE_BLENDFACTOR_SRC1_ALPHA: + case PIPE_BLENDFACTOR_INV_SRC1_COLOR: + case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: + default: ASSERT(0); } /* - * Compute Dest Alpha term + * Compute Dest Alpha term. Like the above, we're looking for + * the full term Afb*factor, not just the factor itself, because + * in many cases we can avoid doing unnecessary multiplies. */ switch (blend->alpha_dst_factor) { case PIPE_BLENDFACTOR_ONE: + /* factor = 1, so term = Afb */ spe_move(f, term2A_reg, fbA_reg); break; case PIPE_BLENDFACTOR_ZERO: - spe_zero(f, term2A_reg); + /* factor = 0, so term = 0 */ + spe_load_float(f, term2A_reg, 0.0f); break; - case PIPE_BLENDFACTOR_SRC_ALPHA: + + case PIPE_BLENDFACTOR_SRC_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_SRC_COLOR: + /* factor = A, so term = Afb*A */ spe_fm(f, term2A_reg, fbA_reg, fragA_reg); break; - case PIPE_BLENDFACTOR_INV_SRC_ALPHA: -#if 0 - /* one = {1.0, 1.0, 1.0, 1.0} */ - if (!one_reg_set) { - one_reg = spe_allocate_available_register(f); - spe_load_float(f, one_reg, 1.0f); - one_reg_set = true; - } - /* tmp = one - fragA */ - spe_fs(f, tmp_reg, one_reg, fragA_reg); - /* termA = fbA * tmp */ - spe_fm(f, term2A_reg, fbA_reg, tmp_reg); -#else - /* Compute: term2A = fbA * (1.0 - fragA) - * Which is: term2A = fbA - fbA * fragA - * Use fnms t,a,b,c which computes t=c-a*b - */ + + case PIPE_BLENDFACTOR_INV_SRC_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_INV_SRC_COLOR: + /* factor = 1-A, so term = Afb*(1-A) = Afb-Afb*A */ + /* fnms(a,b,c,d) computes a = d - b*c */ spe_fnms(f, term2A_reg, fbA_reg, fragA_reg, fbA_reg); -#endif break; - /* XXX more cases */ - // GL_ONE_MINUS_SRC_COLOR - // GL_DST_COLOR - // GL_ONE_MINUS_DST_COLOR - // GL_DST_ALPHA - // GL_CONSTANT_COLOR - // GL_ONE_MINUS_CONSTANT_COLOR - // GL_CONSTANT_ALPHA - // GL_ONE_MINUS_CONSTANT_ALPHA + + case PIPE_BLENDFACTOR_DST_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_DST_COLOR: + /* factor = Afb, so term = Afb*Afb */ + spe_fm(f, term2A_reg, fbA_reg, fbA_reg); + break; + + case PIPE_BLENDFACTOR_INV_DST_ALPHA: /* fall through */ + case PIPE_BLENDFACTOR_INV_DST_COLOR: + /* factor = 1-Afb, so term = Afb*(1-Afb) = Afb - Afb*Afb */ + /* fnms(a,b,c,d) computes a = d - b*c */ + spe_fnms(f, term2A_reg, fbA_reg, fbA_reg, fbA_reg); + break; + + 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]); + /* factor = Ac, so term = Afb*Ac */ + spe_fm(f, term2A_reg, fbA_reg, constA_reg); + break; + + 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]); + /* 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); + break; + + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: /* not supported for dest alpha */ + ASSERT(0); + break; + + /* These are special D3D cases involving a second color output + * from the fragment shader. I'm not sure we can support them + * yet... XXX + */ + case PIPE_BLENDFACTOR_SRC1_COLOR: + case PIPE_BLENDFACTOR_SRC1_ALPHA: + case PIPE_BLENDFACTOR_INV_SRC1_COLOR: + case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: default: ASSERT(0); } /* - * Combine Src/Dest RGB terms + * Combine Src/Dest RGB terms as per the blend equation. */ switch (blend->rgb_func) { case PIPE_BLEND_ADD: @@ -725,14 +835,14 @@ gen_blend(const struct pipe_blend_state *blend, spe_fs(f, fragB_reg, term2B_reg, term1B_reg); break; case PIPE_BLEND_MIN: - FLOAT_VECTOR_MIN(f, fragR_reg, term1R_reg, term2R_reg) - FLOAT_VECTOR_MIN(f, fragG_reg, term1G_reg, term2G_reg) - FLOAT_VECTOR_MIN(f, fragB_reg, term1B_reg, term2B_reg) + spe_float_min(f, fragR_reg, term1R_reg, term2R_reg); + spe_float_min(f, fragG_reg, term1G_reg, term2G_reg); + spe_float_min(f, fragB_reg, term1B_reg, term2B_reg); break; case PIPE_BLEND_MAX: - FLOAT_VECTOR_MAX(f, fragR_reg, term1R_reg, term2R_reg) - FLOAT_VECTOR_MAX(f, fragG_reg, term1G_reg, term2G_reg) - FLOAT_VECTOR_MAX(f, fragB_reg, term1B_reg, term2B_reg) + spe_float_max(f, fragR_reg, term1R_reg, term2R_reg); + spe_float_max(f, fragG_reg, term1G_reg, term2G_reg); + spe_float_max(f, fragB_reg, term1B_reg, term2B_reg); break; default: ASSERT(0); @@ -752,10 +862,10 @@ gen_blend(const struct pipe_blend_state *blend, spe_fs(f, fragA_reg, term2A_reg, term1A_reg); break; case PIPE_BLEND_MIN: - FLOAT_VECTOR_MIN(f, fragA_reg, term1A_reg, term2A_reg) + spe_float_min(f, fragA_reg, term1A_reg, term2A_reg); break; case PIPE_BLEND_MAX: - FLOAT_VECTOR_MAX(f, fragA_reg, term1A_reg, term2A_reg) + spe_float_max(f, fragA_reg, term1A_reg, term2A_reg); break; default: ASSERT(0); @@ -779,9 +889,11 @@ gen_blend(const struct pipe_blend_state *blend, spe_release_register(f, tmp_reg); /* Free any optional registers that actually got used */ - RELEASE_ONE_REG_IF_USED(f) - RELEASE_CONST_COLOR_IF_USED(f) - RELEASE_CONST_ALPHA_IF_USED(f) + 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); } |