diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c')
-rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c new file mode 100644 index 0000000000..3fa5e51cac --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c @@ -0,0 +1,360 @@ +/************************************************************************** + * + * 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 + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + +/** + * @file + * Blend LLVM IR generation -- AoS layout. + * + * AoS blending is in general much slower than SoA, but there are some cases + * where it might be faster. In particular, if a pixel is rendered only once + * then the overhead of tiling and untiling will dominate over the speedup that + * SoA gives. So we might want to detect such cases and fallback to AoS in the + * future, but for now this function is here for historical/benchmarking + * purposes. + * + * Run lp_blend_test after any change to this file. + * + * @author Jose Fonseca <jfonseca@vmware.com> + */ + + +#include "pipe/p_state.h" +#include "util/u_debug.h" + +#include "gallivm/lp_bld_type.h" +#include "gallivm/lp_bld_const.h" +#include "gallivm/lp_bld_arit.h" +#include "gallivm/lp_bld_logic.h" +#include "gallivm/lp_bld_swizzle.h" +#include "gallivm/lp_bld_debug.h" + +#include "lp_bld_blend.h" + + +/** + * We may the same values several times, so we keep them here to avoid + * recomputing them. Also reusing the values allows us to do simplifications + * that LLVM optimization passes wouldn't normally be able to do. + */ +struct lp_build_blend_aos_context +{ + struct lp_build_context base; + + LLVMValueRef src; + LLVMValueRef dst; + LLVMValueRef const_; + + LLVMValueRef inv_src; + LLVMValueRef inv_dst; + LLVMValueRef inv_const; + LLVMValueRef saturate; + + LLVMValueRef rgb_src_factor; + LLVMValueRef alpha_src_factor; + LLVMValueRef rgb_dst_factor; + LLVMValueRef alpha_dst_factor; +}; + + +static LLVMValueRef +lp_build_blend_factor_unswizzled(struct lp_build_blend_aos_context *bld, + unsigned factor, + boolean alpha) +{ + switch (factor) { + case PIPE_BLENDFACTOR_ZERO: + return bld->base.zero; + case PIPE_BLENDFACTOR_ONE: + return bld->base.one; + case PIPE_BLENDFACTOR_SRC_COLOR: + case PIPE_BLENDFACTOR_SRC_ALPHA: + return bld->src; + case PIPE_BLENDFACTOR_DST_COLOR: + case PIPE_BLENDFACTOR_DST_ALPHA: + return bld->dst; + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: + if(alpha) + return bld->base.one; + else { + if(!bld->inv_dst) + bld->inv_dst = lp_build_comp(&bld->base, bld->dst); + if(!bld->saturate) + bld->saturate = lp_build_min(&bld->base, bld->src, bld->inv_dst); + return bld->saturate; + } + case PIPE_BLENDFACTOR_CONST_COLOR: + case PIPE_BLENDFACTOR_CONST_ALPHA: + return bld->const_; + case PIPE_BLENDFACTOR_SRC1_COLOR: + case PIPE_BLENDFACTOR_SRC1_ALPHA: + /* TODO */ + assert(0); + return bld->base.zero; + case PIPE_BLENDFACTOR_INV_SRC_COLOR: + case PIPE_BLENDFACTOR_INV_SRC_ALPHA: + if(!bld->inv_src) + bld->inv_src = lp_build_comp(&bld->base, bld->src); + return bld->inv_src; + case PIPE_BLENDFACTOR_INV_DST_COLOR: + case PIPE_BLENDFACTOR_INV_DST_ALPHA: + if(!bld->inv_dst) + bld->inv_dst = lp_build_comp(&bld->base, bld->dst); + return bld->inv_dst; + case PIPE_BLENDFACTOR_INV_CONST_COLOR: + case PIPE_BLENDFACTOR_INV_CONST_ALPHA: + if(!bld->inv_const) + bld->inv_const = lp_build_comp(&bld->base, bld->const_); + return bld->inv_const; + case PIPE_BLENDFACTOR_INV_SRC1_COLOR: + case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: + /* TODO */ + assert(0); + return bld->base.zero; + default: + assert(0); + return bld->base.zero; + } +} + + +enum lp_build_blend_swizzle { + LP_BUILD_BLEND_SWIZZLE_RGBA = 0, + LP_BUILD_BLEND_SWIZZLE_AAAA = 1 +}; + + +/** + * How should we shuffle the base factor. + */ +static enum lp_build_blend_swizzle +lp_build_blend_factor_swizzle(unsigned factor) +{ + switch (factor) { + case PIPE_BLENDFACTOR_ONE: + case PIPE_BLENDFACTOR_ZERO: + case PIPE_BLENDFACTOR_SRC_COLOR: + case PIPE_BLENDFACTOR_DST_COLOR: + case PIPE_BLENDFACTOR_CONST_COLOR: + case PIPE_BLENDFACTOR_SRC1_COLOR: + case PIPE_BLENDFACTOR_INV_SRC_COLOR: + case PIPE_BLENDFACTOR_INV_DST_COLOR: + case PIPE_BLENDFACTOR_INV_CONST_COLOR: + case PIPE_BLENDFACTOR_INV_SRC1_COLOR: + return LP_BUILD_BLEND_SWIZZLE_RGBA; + case PIPE_BLENDFACTOR_SRC_ALPHA: + case PIPE_BLENDFACTOR_DST_ALPHA: + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: + case PIPE_BLENDFACTOR_SRC1_ALPHA: + case PIPE_BLENDFACTOR_CONST_ALPHA: + case PIPE_BLENDFACTOR_INV_SRC_ALPHA: + case PIPE_BLENDFACTOR_INV_DST_ALPHA: + case PIPE_BLENDFACTOR_INV_CONST_ALPHA: + case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: + return LP_BUILD_BLEND_SWIZZLE_AAAA; + default: + assert(0); + return LP_BUILD_BLEND_SWIZZLE_RGBA; + } +} + + +static LLVMValueRef +lp_build_blend_swizzle(struct lp_build_blend_aos_context *bld, + LLVMValueRef rgb, + LLVMValueRef alpha, + enum lp_build_blend_swizzle rgb_swizzle, + unsigned alpha_swizzle) +{ + if(rgb == alpha) { + if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA) + return rgb; + if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA) + return lp_build_broadcast_aos(&bld->base, rgb, alpha_swizzle); + } + else { + if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA) { + boolean cond[4] = {0, 0, 0, 0}; + cond[alpha_swizzle] = 1; + return lp_build_select_aos(&bld->base, alpha, rgb, cond); + } + if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA) { + unsigned char swizzle[4]; + swizzle[0] = alpha_swizzle; + swizzle[1] = alpha_swizzle; + swizzle[2] = alpha_swizzle; + swizzle[3] = alpha_swizzle; + swizzle[alpha_swizzle] += 4; + return lp_build_swizzle2_aos(&bld->base, rgb, alpha, swizzle); + } + } + assert(0); + return bld->base.undef; +} + + +/** + * @sa http://www.opengl.org/sdk/docs/man/xhtml/glBlendFuncSeparate.xml + */ +static LLVMValueRef +lp_build_blend_factor(struct lp_build_blend_aos_context *bld, + LLVMValueRef factor1, + unsigned rgb_factor, + unsigned alpha_factor, + unsigned alpha_swizzle) +{ + LLVMValueRef rgb_factor_; + LLVMValueRef alpha_factor_; + LLVMValueRef factor2; + enum lp_build_blend_swizzle rgb_swizzle; + + rgb_factor_ = lp_build_blend_factor_unswizzled(bld, rgb_factor, FALSE); + alpha_factor_ = lp_build_blend_factor_unswizzled(bld, alpha_factor, TRUE); + + rgb_swizzle = lp_build_blend_factor_swizzle(rgb_factor); + + factor2 = lp_build_blend_swizzle(bld, rgb_factor_, alpha_factor_, rgb_swizzle, alpha_swizzle); + + return lp_build_mul(&bld->base, factor1, factor2); +} + + +boolean +lp_build_blend_func_commutative(unsigned func) +{ + switch (func) { + case PIPE_BLEND_ADD: + case PIPE_BLEND_MIN: + case PIPE_BLEND_MAX: + return TRUE; + case PIPE_BLEND_SUBTRACT: + case PIPE_BLEND_REVERSE_SUBTRACT: + return FALSE; + default: + assert(0); + return TRUE; + } +} + + +boolean +lp_build_blend_func_reverse(unsigned rgb_func, unsigned alpha_func) +{ + if(rgb_func == alpha_func) + return FALSE; + if(rgb_func == PIPE_BLEND_SUBTRACT && alpha_func == PIPE_BLEND_REVERSE_SUBTRACT) + return TRUE; + if(rgb_func == PIPE_BLEND_REVERSE_SUBTRACT && alpha_func == PIPE_BLEND_SUBTRACT) + return TRUE; + return FALSE; +} + + +/** + * @sa http://www.opengl.org/sdk/docs/man/xhtml/glBlendEquationSeparate.xml + */ +LLVMValueRef +lp_build_blend_func(struct lp_build_context *bld, + unsigned func, + LLVMValueRef term1, + LLVMValueRef term2) +{ + switch (func) { + case PIPE_BLEND_ADD: + return lp_build_add(bld, term1, term2); + case PIPE_BLEND_SUBTRACT: + return lp_build_sub(bld, term1, term2); + case PIPE_BLEND_REVERSE_SUBTRACT: + return lp_build_sub(bld, term2, term1); + case PIPE_BLEND_MIN: + return lp_build_min(bld, term1, term2); + case PIPE_BLEND_MAX: + return lp_build_max(bld, term1, term2); + default: + assert(0); + return bld->zero; + } +} + + +LLVMValueRef +lp_build_blend_aos(LLVMBuilderRef builder, + const struct pipe_blend_state *blend, + struct lp_type type, + LLVMValueRef src, + LLVMValueRef dst, + LLVMValueRef const_, + unsigned alpha_swizzle) +{ + struct lp_build_blend_aos_context bld; + LLVMValueRef src_term; + LLVMValueRef dst_term; + + /* FIXME */ + assert(blend->independent_blend_enable == 0); + assert(blend->rt[0].colormask == 0xf); + + if(!blend->rt[0].blend_enable) + return src; + + /* It makes no sense to blend unless values are normalized */ + assert(type.norm); + + /* Setup build context */ + memset(&bld, 0, sizeof bld); + lp_build_context_init(&bld.base, builder, type); + bld.src = src; + bld.dst = dst; + bld.const_ = const_; + + /* TODO: There are still a few optimization opportunities here. For certain + * combinations it is possible to reorder the operations and therefore saving + * some instructions. */ + + src_term = lp_build_blend_factor(&bld, src, blend->rt[0].rgb_src_factor, + blend->rt[0].alpha_src_factor, alpha_swizzle); + dst_term = lp_build_blend_factor(&bld, dst, blend->rt[0].rgb_dst_factor, + blend->rt[0].alpha_dst_factor, alpha_swizzle); + + lp_build_name(src_term, "src_term"); + lp_build_name(dst_term, "dst_term"); + + if(blend->rt[0].rgb_func == blend->rt[0].alpha_func) { + return lp_build_blend_func(&bld.base, blend->rt[0].rgb_func, src_term, dst_term); + } + else { + /* Seperate RGB / A functions */ + + LLVMValueRef rgb; + LLVMValueRef alpha; + + rgb = lp_build_blend_func(&bld.base, blend->rt[0].rgb_func, src_term, dst_term); + alpha = lp_build_blend_func(&bld.base, blend->rt[0].alpha_func, src_term, dst_term); + + return lp_build_blend_swizzle(&bld, rgb, alpha, LP_BUILD_BLEND_SWIZZLE_RGBA, alpha_swizzle); + } +} |