From: Marek Olšák Date: Sun, 27 Dec 2015 16:53:44 +0000 (+0100) Subject: radeonsi: only use LLVMBuildLoad once when updating color outputs at the end X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=677c65968b636793bc5e928615fdd12491066ded;p=mesa.git radeonsi: only use LLVMBuildLoad once when updating color outputs at the end without LLVMBuildStore. So: - do LLVMBuildLoad - update the values as necessary - export Reviewed-by: Nicolai Hähnle --- diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 73a34ac254e..13e5140d4db 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -1334,24 +1334,8 @@ static void si_llvm_init_export_args(struct lp_build_tgsi_context *bld_base, memcpy(&args[5], values, sizeof(values[0]) * 4); } -/* Load from output pointers and initialize arguments for the shader export intrinsic */ -static void si_llvm_init_export_args_load(struct lp_build_tgsi_context *bld_base, - LLVMValueRef *out_ptr, - unsigned target, - LLVMValueRef *args) -{ - struct gallivm_state *gallivm = bld_base->base.gallivm; - LLVMValueRef values[4]; - int i; - - for (i = 0; i < 4; i++) - values[i] = LLVMBuildLoad(gallivm->builder, out_ptr[i], ""); - - si_llvm_init_export_args(bld_base, values, target, args); -} - static void si_alpha_test(struct lp_build_tgsi_context *bld_base, - LLVMValueRef alpha_ptr) + LLVMValueRef alpha) { struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = bld_base->base.gallivm; @@ -1363,8 +1347,7 @@ static void si_alpha_test(struct lp_build_tgsi_context *bld_base, LLVMValueRef alpha_pass = lp_build_cmp(&bld_base->base, si_shader_ctx->shader->key.ps.alpha_func, - LLVMBuildLoad(gallivm->builder, alpha_ptr, ""), - alpha_ref); + alpha, alpha_ref); LLVMValueRef arg = lp_build_select(&bld_base->base, alpha_pass, @@ -1383,12 +1366,12 @@ static void si_alpha_test(struct lp_build_tgsi_context *bld_base, } } -static void si_scale_alpha_by_sample_mask(struct lp_build_tgsi_context *bld_base, - LLVMValueRef alpha_ptr) +static LLVMValueRef si_scale_alpha_by_sample_mask(struct lp_build_tgsi_context *bld_base, + LLVMValueRef alpha) { struct si_shader_context *si_shader_ctx = si_shader_context(bld_base); struct gallivm_state *gallivm = bld_base->base.gallivm; - LLVMValueRef coverage, alpha; + LLVMValueRef coverage; /* alpha = alpha * popcount(coverage) / SI_NUM_SMOOTH_AA_SAMPLES */ coverage = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, @@ -1406,9 +1389,7 @@ static void si_scale_alpha_by_sample_mask(struct lp_build_tgsi_context *bld_base lp_build_const_float(gallivm, 1.0 / SI_NUM_SMOOTH_AA_SAMPLES), ""); - alpha = LLVMBuildLoad(gallivm->builder, alpha_ptr, ""); - alpha = LLVMBuildFMul(gallivm->builder, alpha, coverage, ""); - LLVMBuildStore(gallivm->builder, alpha, alpha_ptr); + return LLVMBuildFMul(gallivm->builder, alpha, coverage, ""); } static void si_llvm_emit_clipvertex(struct lp_build_tgsi_context * bld_base, @@ -2196,8 +2177,8 @@ static void si_llvm_emit_fs_epilogue(struct lp_build_tgsi_context * bld_base) for (i = 0; i < info->num_outputs; i++) { unsigned semantic_name = info->output_semantic_name[i]; unsigned semantic_index = info->output_semantic_index[i]; - unsigned target; - LLVMValueRef alpha_ptr; + unsigned target, j; + LLVMValueRef color[4] = {}; /* Select the correct target */ switch (semantic_name) { @@ -2215,29 +2196,24 @@ static void si_llvm_emit_fs_epilogue(struct lp_build_tgsi_context * bld_base) continue; case TGSI_SEMANTIC_COLOR: target = V_008DFC_SQ_EXP_MRT + semantic_index; - alpha_ptr = si_shader_ctx->radeon_bld.soa.outputs[i][3]; - if (si_shader_ctx->shader->key.ps.clamp_color) { - for (int j = 0; j < 4; j++) { - LLVMValueRef ptr = si_shader_ctx->radeon_bld.soa.outputs[i][j]; - LLVMValueRef result = LLVMBuildLoad(builder, ptr, ""); + for (j = 0; j < 4; j++) + color[j] = LLVMBuildLoad(builder, + si_shader_ctx->radeon_bld.soa.outputs[i][j], ""); - result = radeon_llvm_saturate(bld_base, result); - LLVMBuildStore(builder, result, ptr); - } - } + if (si_shader_ctx->shader->key.ps.clamp_color) + for (j = 0; j < 4; j++) + color[j] = radeon_llvm_saturate(bld_base, color[j]); if (si_shader_ctx->shader->key.ps.alpha_to_one) - LLVMBuildStore(base->gallivm->builder, - base->one, alpha_ptr); + color[3] = base->one; if (semantic_index == 0 && si_shader_ctx->shader->key.ps.alpha_func != PIPE_FUNC_ALWAYS) - si_alpha_test(bld_base, alpha_ptr); + si_alpha_test(bld_base, color[3]); if (si_shader_ctx->shader->key.ps.poly_line_smoothing) - si_scale_alpha_by_sample_mask(bld_base, alpha_ptr); - + color[3] = si_scale_alpha_by_sample_mask(bld_base, color[3]); break; default: fprintf(stderr, @@ -2250,18 +2226,15 @@ static void si_llvm_emit_fs_epilogue(struct lp_build_tgsi_context * bld_base) if (semantic_index == 0 && si_shader_ctx->shader->key.ps.last_cbuf > 0) { for (int c = 1; c <= si_shader_ctx->shader->key.ps.last_cbuf; c++) { - si_llvm_init_export_args_load(bld_base, - si_shader_ctx->radeon_bld.soa.outputs[i], - V_008DFC_SQ_EXP_MRT + c, args); + si_llvm_init_export_args(bld_base, color, + V_008DFC_SQ_EXP_MRT + c, args); lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export", LLVMVoidTypeInContext(base->gallivm->context), args, 9, 0); } } - si_llvm_init_export_args_load(bld_base, - si_shader_ctx->radeon_bld.soa.outputs[i], - target, args); + si_llvm_init_export_args(bld_base, color, target, args); if (last_color_export == i) { args[1] = uint->one; /* whether the EXEC mask is valid */ args[2] = uint->one; /* DONE bit */