From: Marek Olšák Date: Fri, 1 Jan 2016 23:41:43 +0000 (+0100) Subject: radeonsi: split PS input interpolation code into its own function X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c379c2540b7343b02a4c1b4d3cad3c194729d617;p=mesa.git radeonsi: split PS input interpolation code into its own function This will be used by the fragment shader prolog. Reviewed-by: Nicolai Hähnle --- diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 0a92a7b54e6..d9006bc3d6a 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -858,48 +858,42 @@ static unsigned select_interp_param(struct si_shader_context *si_shader_ctx, } } -static void declare_input_fs( - struct radeon_llvm_context *radeon_bld, - unsigned input_index, - const struct tgsi_full_declaration *decl) +/** + * Interpolate a fragment shader input. + * + * @param si_shader_ctx context + * @param input_index index of the input in hardware + * @param semantic_name TGSI_SEMANTIC_* + * @param semantic_index semantic index + * @param num_interp_inputs number of all interpolated inputs (= BCOLOR offset) + * @param colors_read_mask color components read (4 bits for each color, 8 bits in total) + * @param interp_param interpolation weights (i,j) + * @param prim_mask SI_PARAM_PRIM_MASK + * @param face SI_PARAM_FRONT_FACE + * @param result the return value (4 components) + */ +static void interp_fs_input(struct si_shader_context *si_shader_ctx, + unsigned input_index, + unsigned semantic_name, + unsigned semantic_index, + unsigned num_interp_inputs, + unsigned colors_read_mask, + LLVMValueRef interp_param, + LLVMValueRef prim_mask, + LLVMValueRef face, + LLVMValueRef result[4]) { - struct lp_build_context *base = &radeon_bld->soa.bld_base.base; - struct si_shader_context *si_shader_ctx = - si_shader_context(&radeon_bld->soa.bld_base); - struct si_shader *shader = si_shader_ctx->shader; - struct lp_build_context *uint = &radeon_bld->soa.bld_base.uint_bld; + struct lp_build_context *base = &si_shader_ctx->radeon_bld.soa.bld_base.base; + struct lp_build_context *uint = &si_shader_ctx->radeon_bld.soa.bld_base.uint_bld; struct gallivm_state *gallivm = base->gallivm; LLVMTypeRef input_type = LLVMFloatTypeInContext(gallivm->context); - LLVMValueRef main_fn = radeon_bld->main_fn; - - LLVMValueRef interp_param = NULL; - int interp_param_idx; const char * intr_name; - - /* This value is: - * [15:0] NewPrimMask (Bit mask for each quad. It is set it the - * quad begins a new primitive. Bit 0 always needs - * to be unset) - * [32:16] ParamOffset - * - */ - LLVMValueRef params = LLVMGetParam(main_fn, SI_PARAM_PRIM_MASK); LLVMValueRef attr_number; unsigned chan; attr_number = lp_build_const_int32(gallivm, input_index); - interp_param_idx = lookup_interp_param_index(decl->Interp.Interpolate, - decl->Interp.Location); - if (interp_param_idx == -1) - return; - else if (interp_param_idx) { - interp_param_idx = select_interp_param(si_shader_ctx, - interp_param_idx); - interp_param = LLVMGetParam(main_fn, interp_param_idx); - } - /* fs.constant returns the param from the middle vertex, so it's not * really useful for flat shading. It's meant to be used for custom * interpolation (but the intrinsic can't fetch from the other two @@ -912,32 +906,28 @@ static void declare_input_fs( */ intr_name = interp_param ? "llvm.SI.fs.interp" : "llvm.SI.fs.constant"; - if (decl->Semantic.Name == TGSI_SEMANTIC_COLOR && + if (semantic_name == TGSI_SEMANTIC_COLOR && si_shader_ctx->shader->key.ps.color_two_side) { - struct tgsi_shader_info *info = &shader->selector->info; LLVMValueRef args[4]; - LLVMValueRef face, is_face_positive; + LLVMValueRef is_face_positive; LLVMValueRef back_attr_number; /* If BCOLOR0 is used, BCOLOR1 is at offset "num_inputs + 1", * otherwise it's at offset "num_inputs". */ - unsigned back_attr_offset = shader->selector->info.num_inputs; - if (decl->Semantic.Index == 1 && info->colors_read & 0xf) + unsigned back_attr_offset = num_interp_inputs; + if (semantic_index == 1 && colors_read_mask & 0xf) back_attr_offset += 1; back_attr_number = lp_build_const_int32(gallivm, back_attr_offset); - face = LLVMGetParam(main_fn, SI_PARAM_FRONT_FACE); - is_face_positive = LLVMBuildICmp(gallivm->builder, LLVMIntNE, face, uint->zero, ""); - args[2] = params; + args[2] = prim_mask; args[3] = interp_param; for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) { LLVMValueRef llvm_chan = lp_build_const_int32(gallivm, chan); - unsigned soa_index = radeon_llvm_reg_index_soa(input_index, chan); LLVMValueRef front, back; args[0] = llvm_chan; @@ -951,46 +941,71 @@ static void declare_input_fs( input_type, args, args[3] ? 4 : 3, LLVMReadNoneAttribute | LLVMNoUnwindAttribute); - radeon_bld->inputs[soa_index] = - LLVMBuildSelect(gallivm->builder, + result[chan] = LLVMBuildSelect(gallivm->builder, is_face_positive, front, back, ""); } - } else if (decl->Semantic.Name == TGSI_SEMANTIC_FOG) { + } else if (semantic_name == TGSI_SEMANTIC_FOG) { LLVMValueRef args[4]; args[0] = uint->zero; args[1] = attr_number; - args[2] = params; + args[2] = prim_mask; args[3] = interp_param; - radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 0)] = - lp_build_intrinsic(gallivm->builder, intr_name, + result[0] = lp_build_intrinsic(gallivm->builder, intr_name, input_type, args, args[3] ? 4 : 3, LLVMReadNoneAttribute | LLVMNoUnwindAttribute); - radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 1)] = - radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 2)] = - lp_build_const_float(gallivm, 0.0f); - radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 3)] = - lp_build_const_float(gallivm, 1.0f); + result[1] = + result[2] = lp_build_const_float(gallivm, 0.0f); + result[3] = lp_build_const_float(gallivm, 1.0f); } else { for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) { LLVMValueRef args[4]; LLVMValueRef llvm_chan = lp_build_const_int32(gallivm, chan); - unsigned soa_index = radeon_llvm_reg_index_soa(input_index, chan); + args[0] = llvm_chan; args[1] = attr_number; - args[2] = params; + args[2] = prim_mask; args[3] = interp_param; - radeon_bld->inputs[soa_index] = - lp_build_intrinsic(gallivm->builder, intr_name, + result[chan] = lp_build_intrinsic(gallivm->builder, intr_name, input_type, args, args[3] ? 4 : 3, LLVMReadNoneAttribute | LLVMNoUnwindAttribute); } } } +static void declare_input_fs( + struct radeon_llvm_context *radeon_bld, + unsigned input_index, + const struct tgsi_full_declaration *decl) +{ + struct si_shader_context *si_shader_ctx = + si_shader_context(&radeon_bld->soa.bld_base); + struct si_shader *shader = si_shader_ctx->shader; + LLVMValueRef main_fn = radeon_bld->main_fn; + LLVMValueRef interp_param = NULL; + int interp_param_idx; + + interp_param_idx = lookup_interp_param_index(decl->Interp.Interpolate, + decl->Interp.Location); + if (interp_param_idx == -1) + return; + else if (interp_param_idx) { + interp_param_idx = select_interp_param(si_shader_ctx, + interp_param_idx); + interp_param = LLVMGetParam(main_fn, interp_param_idx); + } + + interp_fs_input(si_shader_ctx, input_index, decl->Semantic.Name, + decl->Semantic.Index, shader->selector->info.num_inputs, + shader->selector->info.colors_read, interp_param, + LLVMGetParam(main_fn, SI_PARAM_PRIM_MASK), + LLVMGetParam(main_fn, SI_PARAM_FRONT_FACE), + &radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 0)]); +} + static LLVMValueRef get_sample_id(struct radeon_llvm_context *radeon_bld) { return unpack_param(si_shader_context(&radeon_bld->soa.bld_base),