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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_state_fs.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_state_fs.c | 1322 |
1 files changed, 1322 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c new file mode 100644 index 0000000000..65115052cd --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c @@ -0,0 +1,1322 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 TUNGSTEN GRAPHICS 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 + * Code generate the whole fragment pipeline. + * + * The fragment pipeline consists of the following stages: + * - triangle edge in/out testing + * - scissor test + * - stipple (TBI) + * - early depth test + * - fragment shader + * - alpha test + * - depth/stencil test + * - blending + * + * This file has only the glue to assemble the fragment pipeline. The actual + * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the + * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we + * muster the LLVM JIT execution engine to create a function that follows an + * established binary interface and that can be called from C directly. + * + * A big source of complexity here is that we often want to run different + * stages with different precisions and data types and precisions. For example, + * the fragment shader needs typically to be done in floats, but the + * depth/stencil test and blending is better done in the type that most closely + * matches the depth/stencil and color buffer respectively. + * + * Since the width of a SIMD vector register stays the same regardless of the + * element type, different types imply different number of elements, so we must + * code generate more instances of the stages with larger types to be able to + * feed/consume the stages with smaller types. + * + * @author Jose Fonseca <jfonseca@vmware.com> + */ + +#include <limits.h> +#include "pipe/p_defines.h" +#include "util/u_inlines.h" +#include "util/u_memory.h" +#include "util/u_pointer.h" +#include "util/u_format.h" +#include "util/u_dump.h" +#include "util/u_string.h" +#include "util/u_simple_list.h" +#include "os/os_time.h" +#include "pipe/p_shader_tokens.h" +#include "draw/draw_context.h" +#include "tgsi/tgsi_dump.h" +#include "tgsi/tgsi_scan.h" +#include "tgsi/tgsi_parse.h" +#include "gallivm/lp_bld_type.h" +#include "gallivm/lp_bld_const.h" +#include "gallivm/lp_bld_conv.h" +#include "gallivm/lp_bld_intr.h" +#include "gallivm/lp_bld_logic.h" +#include "gallivm/lp_bld_tgsi.h" +#include "gallivm/lp_bld_swizzle.h" +#include "gallivm/lp_bld_flow.h" +#include "gallivm/lp_bld_debug.h" + +#include "lp_bld_alpha.h" +#include "lp_bld_blend.h" +#include "lp_bld_depth.h" +#include "lp_bld_interp.h" +#include "lp_context.h" +#include "lp_debug.h" +#include "lp_perf.h" +#include "lp_screen.h" +#include "lp_setup.h" +#include "lp_state.h" +#include "lp_tex_sample.h" +#include "lp_flush.h" + + +#include <llvm-c/Analysis.h> + + +static unsigned fs_no = 0; + + +/** + * Generate the depth /stencil test code. + */ +static void +generate_depth_stencil(LLVMBuilderRef builder, + const struct lp_fragment_shader_variant_key *key, + struct lp_type src_type, + struct lp_build_mask_context *mask, + LLVMValueRef stencil_refs[2], + LLVMValueRef src, + LLVMValueRef dst_ptr, + LLVMValueRef facing, + LLVMValueRef counter) +{ + const struct util_format_description *format_desc; + struct lp_type dst_type; + + if (!key->depth.enabled && !key->stencil[0].enabled && !key->stencil[1].enabled) + return; + + format_desc = util_format_description(key->zsbuf_format); + assert(format_desc); + + /* + * Depths are expected to be between 0 and 1, even if they are stored in + * floats. Setting these bits here will ensure that the lp_build_conv() call + * below won't try to unnecessarily clamp the incoming values. + */ + if(src_type.floating) { + src_type.sign = FALSE; + src_type.norm = TRUE; + } + else { + assert(!src_type.sign); + assert(src_type.norm); + } + + /* Pick the depth type. */ + dst_type = lp_depth_type(format_desc, src_type.width*src_type.length); + + /* FIXME: Cope with a depth test type with a different bit width. */ + assert(dst_type.width == src_type.width); + assert(dst_type.length == src_type.length); + + /* Convert fragment Z from float to integer */ + lp_build_conv(builder, src_type, dst_type, &src, 1, &src, 1); + + dst_ptr = LLVMBuildBitCast(builder, + dst_ptr, + LLVMPointerType(lp_build_vec_type(dst_type), 0), ""); + lp_build_depth_stencil_test(builder, + &key->depth, + key->stencil, + dst_type, + format_desc, + mask, + stencil_refs, + src, + dst_ptr, + facing, + counter); +} + + +/** + * Generate the code to do inside/outside triangle testing for the + * four pixels in a 2x2 quad. This will set the four elements of the + * quad mask vector to 0 or ~0. + * \param i which quad of the quad group to test, in [0,3] + */ +static void +generate_tri_edge_mask(LLVMBuilderRef builder, + unsigned i, + LLVMValueRef *mask, /* ivec4, out */ + LLVMValueRef c0, /* int32 */ + LLVMValueRef c1, /* int32 */ + LLVMValueRef c2, /* int32 */ + LLVMValueRef step0_ptr, /* ivec4 */ + LLVMValueRef step1_ptr, /* ivec4 */ + LLVMValueRef step2_ptr) /* ivec4 */ +{ +#define OPTIMIZE_IN_OUT_TEST 0 +#if OPTIMIZE_IN_OUT_TEST + struct lp_build_if_state ifctx; + LLVMValueRef not_draw_all; +#endif + struct lp_build_flow_context *flow; + struct lp_type i32_type; + LLVMTypeRef i32vec4_type; + LLVMValueRef c0_vec, c1_vec, c2_vec; + LLVMValueRef in_out_mask; + + assert(i < 4); + + /* int32 vector type */ + memset(&i32_type, 0, sizeof i32_type); + i32_type.floating = FALSE; /* values are integers */ + i32_type.sign = TRUE; /* values are signed */ + i32_type.norm = FALSE; /* values are not normalized */ + i32_type.width = 32; /* 32-bit int values */ + i32_type.length = 4; /* 4 elements per vector */ + + i32vec4_type = lp_build_int32_vec4_type(); + + /* + * Use a conditional here to do detailed pixel in/out testing. + * We only have to do this if c0 != INT_MIN. + */ + flow = lp_build_flow_create(builder); + lp_build_flow_scope_begin(flow); + + { +#if OPTIMIZE_IN_OUT_TEST + /* not_draw_all = (c0 != INT_MIN) */ + not_draw_all = LLVMBuildICmp(builder, + LLVMIntNE, + c0, + LLVMConstInt(LLVMInt32Type(), INT_MIN, 0), + ""); + + in_out_mask = lp_build_const_int_vec(i32_type, ~0); + + + lp_build_flow_scope_declare(flow, &in_out_mask); + + /* if (not_draw_all) {... */ + lp_build_if(&ifctx, flow, builder, not_draw_all); +#endif + { + LLVMValueRef step0_vec, step1_vec, step2_vec; + LLVMValueRef m0_vec, m1_vec, m2_vec; + LLVMValueRef index, m; + + /* c0_vec = {c0, c0, c0, c0} + * Note that we emit this code four times but LLVM optimizes away + * three instances of it. + */ + c0_vec = lp_build_broadcast(builder, i32vec4_type, c0); + c1_vec = lp_build_broadcast(builder, i32vec4_type, c1); + c2_vec = lp_build_broadcast(builder, i32vec4_type, c2); + lp_build_name(c0_vec, "edgeconst0vec"); + lp_build_name(c1_vec, "edgeconst1vec"); + lp_build_name(c2_vec, "edgeconst2vec"); + + /* load step0vec, step1, step2 vec from memory */ + index = LLVMConstInt(LLVMInt32Type(), i, 0); + step0_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step0_ptr, &index, 1, ""), ""); + step1_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step1_ptr, &index, 1, ""), ""); + step2_vec = LLVMBuildLoad(builder, LLVMBuildGEP(builder, step2_ptr, &index, 1, ""), ""); + lp_build_name(step0_vec, "step0vec"); + lp_build_name(step1_vec, "step1vec"); + lp_build_name(step2_vec, "step2vec"); + + /* m0_vec = step0_ptr[i] > c0_vec */ + m0_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step0_vec, c0_vec); + m1_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step1_vec, c1_vec); + m2_vec = lp_build_compare(builder, i32_type, PIPE_FUNC_GREATER, step2_vec, c2_vec); + + /* in_out_mask = m0_vec & m1_vec & m2_vec */ + m = LLVMBuildAnd(builder, m0_vec, m1_vec, ""); + in_out_mask = LLVMBuildAnd(builder, m, m2_vec, ""); + lp_build_name(in_out_mask, "inoutmaskvec"); + } +#if OPTIMIZE_IN_OUT_TEST + lp_build_endif(&ifctx); +#endif + + } + lp_build_flow_scope_end(flow); + lp_build_flow_destroy(flow); + + /* This is the initial alive/dead pixel mask for a quad of four pixels. + * It's an int[4] vector with each word set to 0 or ~0. + * Words will get cleared when pixels faile the Z test, etc. + */ + *mask = in_out_mask; +} + + +static LLVMValueRef +generate_scissor_test(LLVMBuilderRef builder, + LLVMValueRef context_ptr, + const struct lp_build_interp_soa_context *interp, + struct lp_type type) +{ + LLVMTypeRef vec_type = lp_build_vec_type(type); + LLVMValueRef xpos = interp->pos[0], ypos = interp->pos[1]; + LLVMValueRef xmin, ymin, xmax, ymax; + LLVMValueRef m0, m1, m2, m3, m; + + /* xpos, ypos contain the window coords for the four pixels in the quad */ + assert(xpos); + assert(ypos); + + /* get the current scissor bounds, convert to vectors */ + xmin = lp_jit_context_scissor_xmin_value(builder, context_ptr); + xmin = lp_build_broadcast(builder, vec_type, xmin); + + ymin = lp_jit_context_scissor_ymin_value(builder, context_ptr); + ymin = lp_build_broadcast(builder, vec_type, ymin); + + xmax = lp_jit_context_scissor_xmax_value(builder, context_ptr); + xmax = lp_build_broadcast(builder, vec_type, xmax); + + ymax = lp_jit_context_scissor_ymax_value(builder, context_ptr); + ymax = lp_build_broadcast(builder, vec_type, ymax); + + /* compare the fragment's position coordinates against the scissor bounds */ + m0 = lp_build_compare(builder, type, PIPE_FUNC_GEQUAL, xpos, xmin); + m1 = lp_build_compare(builder, type, PIPE_FUNC_GEQUAL, ypos, ymin); + m2 = lp_build_compare(builder, type, PIPE_FUNC_LESS, xpos, xmax); + m3 = lp_build_compare(builder, type, PIPE_FUNC_LESS, ypos, ymax); + + /* AND all the masks together */ + m = LLVMBuildAnd(builder, m0, m1, ""); + m = LLVMBuildAnd(builder, m, m2, ""); + m = LLVMBuildAnd(builder, m, m3, ""); + + lp_build_name(m, "scissormask"); + + return m; +} + + +static LLVMValueRef +build_int32_vec_const(int value) +{ + struct lp_type i32_type; + + memset(&i32_type, 0, sizeof i32_type); + i32_type.floating = FALSE; /* values are integers */ + i32_type.sign = TRUE; /* values are signed */ + i32_type.norm = FALSE; /* values are not normalized */ + i32_type.width = 32; /* 32-bit int values */ + i32_type.length = 4; /* 4 elements per vector */ + return lp_build_const_int_vec(i32_type, value); +} + + + +/** + * Generate the fragment shader, depth/stencil test, and alpha tests. + * \param i which quad in the tile, in range [0,3] + * \param do_tri_test if 1, do triangle edge in/out testing + */ +static void +generate_fs(struct llvmpipe_context *lp, + struct lp_fragment_shader *shader, + const struct lp_fragment_shader_variant_key *key, + LLVMBuilderRef builder, + struct lp_type type, + LLVMValueRef context_ptr, + unsigned i, + const struct lp_build_interp_soa_context *interp, + struct lp_build_sampler_soa *sampler, + LLVMValueRef *pmask, + LLVMValueRef (*color)[4], + LLVMValueRef depth_ptr, + LLVMValueRef facing, + unsigned do_tri_test, + LLVMValueRef c0, + LLVMValueRef c1, + LLVMValueRef c2, + LLVMValueRef step0_ptr, + LLVMValueRef step1_ptr, + LLVMValueRef step2_ptr, + LLVMValueRef counter) +{ + const struct tgsi_token *tokens = shader->base.tokens; + LLVMTypeRef vec_type; + LLVMValueRef consts_ptr; + LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS]; + LLVMValueRef z = interp->pos[2]; + LLVMValueRef stencil_refs[2]; + struct lp_build_flow_context *flow; + struct lp_build_mask_context mask; + boolean early_depth_stencil_test; + unsigned attrib; + unsigned chan; + unsigned cbuf; + + assert(i < 4); + + stencil_refs[0] = lp_jit_context_stencil_ref_front_value(builder, context_ptr); + stencil_refs[1] = lp_jit_context_stencil_ref_back_value(builder, context_ptr); + + vec_type = lp_build_vec_type(type); + + consts_ptr = lp_jit_context_constants(builder, context_ptr); + + flow = lp_build_flow_create(builder); + + memset(outputs, 0, sizeof outputs); + + lp_build_flow_scope_begin(flow); + + /* Declare the color and z variables */ + for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + color[cbuf][chan] = LLVMGetUndef(vec_type); + lp_build_flow_scope_declare(flow, &color[cbuf][chan]); + } + } + lp_build_flow_scope_declare(flow, &z); + + /* do triangle edge testing */ + if (do_tri_test) { + generate_tri_edge_mask(builder, i, pmask, + c0, c1, c2, step0_ptr, step1_ptr, step2_ptr); + } + else { + *pmask = build_int32_vec_const(~0); + } + + /* 'mask' will control execution based on quad's pixel alive/killed state */ + lp_build_mask_begin(&mask, flow, type, *pmask); + + if (key->scissor) { + LLVMValueRef smask = + generate_scissor_test(builder, context_ptr, interp, type); + lp_build_mask_update(&mask, smask); + } + + early_depth_stencil_test = + (key->depth.enabled || key->stencil[0].enabled) && + !key->alpha.enabled && + !shader->info.uses_kill && + !shader->info.writes_z; + + if (early_depth_stencil_test) + generate_depth_stencil(builder, key, + type, &mask, + stencil_refs, z, depth_ptr, facing, counter); + + lp_build_tgsi_soa(builder, tokens, type, &mask, + consts_ptr, interp->pos, interp->inputs, + outputs, sampler, &shader->info); + + /* loop over fragment shader outputs/results */ + for (attrib = 0; attrib < shader->info.num_outputs; ++attrib) { + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + if(outputs[attrib][chan]) { + LLVMValueRef out = LLVMBuildLoad(builder, outputs[attrib][chan], ""); + lp_build_name(out, "output%u.%u.%c", i, attrib, "xyzw"[chan]); + + switch (shader->info.output_semantic_name[attrib]) { + case TGSI_SEMANTIC_COLOR: + { + unsigned cbuf = shader->info.output_semantic_index[attrib]; + + lp_build_name(out, "color%u.%u.%c", i, attrib, "rgba"[chan]); + + /* Alpha test */ + /* XXX: should the alpha reference value be passed separately? */ + /* XXX: should only test the final assignment to alpha */ + if(cbuf == 0 && chan == 3) { + LLVMValueRef alpha = out; + LLVMValueRef alpha_ref_value; + alpha_ref_value = lp_jit_context_alpha_ref_value(builder, context_ptr); + alpha_ref_value = lp_build_broadcast(builder, vec_type, alpha_ref_value); + lp_build_alpha_test(builder, &key->alpha, type, + &mask, alpha, alpha_ref_value); + } + + color[cbuf][chan] = out; + break; + } + + case TGSI_SEMANTIC_POSITION: + if(chan == 2) + z = out; + break; + } + } + } + } + + if (!early_depth_stencil_test) + generate_depth_stencil(builder, key, + type, &mask, + stencil_refs, z, depth_ptr, facing, counter); + + lp_build_mask_end(&mask); + + lp_build_flow_scope_end(flow); + + lp_build_flow_destroy(flow); + + *pmask = mask.value; + +} + + +/** + * Generate color blending and color output. + * \param rt the render target index (to index blend, colormask state) + * \param type the pixel color type + * \param context_ptr pointer to the runtime JIT context + * \param mask execution mask (active fragment/pixel mask) + * \param src colors from the fragment shader + * \param dst_ptr the destination color buffer pointer + */ +static void +generate_blend(const struct pipe_blend_state *blend, + unsigned rt, + LLVMBuilderRef builder, + struct lp_type type, + LLVMValueRef context_ptr, + LLVMValueRef mask, + LLVMValueRef *src, + LLVMValueRef dst_ptr) +{ + struct lp_build_context bld; + struct lp_build_flow_context *flow; + struct lp_build_mask_context mask_ctx; + LLVMTypeRef vec_type; + LLVMValueRef const_ptr; + LLVMValueRef con[4]; + LLVMValueRef dst[4]; + LLVMValueRef res[4]; + unsigned chan; + + lp_build_context_init(&bld, builder, type); + + flow = lp_build_flow_create(builder); + + /* we'll use this mask context to skip blending if all pixels are dead */ + lp_build_mask_begin(&mask_ctx, flow, type, mask); + + vec_type = lp_build_vec_type(type); + + const_ptr = lp_jit_context_blend_color(builder, context_ptr); + const_ptr = LLVMBuildBitCast(builder, const_ptr, + LLVMPointerType(vec_type, 0), ""); + + /* load constant blend color and colors from the dest color buffer */ + for(chan = 0; chan < 4; ++chan) { + LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0); + con[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, const_ptr, &index, 1, ""), ""); + + dst[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dst_ptr, &index, 1, ""), ""); + + lp_build_name(con[chan], "con.%c", "rgba"[chan]); + lp_build_name(dst[chan], "dst.%c", "rgba"[chan]); + } + + /* do blend */ + lp_build_blend_soa(builder, blend, type, rt, src, dst, con, res); + + /* store results to color buffer */ + for(chan = 0; chan < 4; ++chan) { + if(blend->rt[rt].colormask & (1 << chan)) { + LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0); + lp_build_name(res[chan], "res.%c", "rgba"[chan]); + res[chan] = lp_build_select(&bld, mask, res[chan], dst[chan]); + LLVMBuildStore(builder, res[chan], LLVMBuildGEP(builder, dst_ptr, &index, 1, "")); + } + } + + lp_build_mask_end(&mask_ctx); + lp_build_flow_destroy(flow); +} + + +/** + * Generate the runtime callable function for the whole fragment pipeline. + * Note that the function which we generate operates on a block of 16 + * pixels at at time. The block contains 2x2 quads. Each quad contains + * 2x2 pixels. + */ +static void +generate_fragment(struct llvmpipe_context *lp, + struct lp_fragment_shader *shader, + struct lp_fragment_shader_variant *variant, + unsigned do_tri_test) +{ + struct llvmpipe_screen *screen = llvmpipe_screen(lp->pipe.screen); + const struct lp_fragment_shader_variant_key *key = &variant->key; + char func_name[256]; + struct lp_type fs_type; + struct lp_type blend_type; + LLVMTypeRef fs_elem_type; + LLVMTypeRef fs_int_vec_type; + LLVMTypeRef blend_vec_type; + LLVMTypeRef arg_types[16]; + LLVMTypeRef func_type; + LLVMTypeRef int32_vec4_type = lp_build_int32_vec4_type(); + LLVMValueRef context_ptr; + LLVMValueRef x; + LLVMValueRef y; + LLVMValueRef a0_ptr; + LLVMValueRef dadx_ptr; + LLVMValueRef dady_ptr; + LLVMValueRef color_ptr_ptr; + LLVMValueRef depth_ptr; + LLVMValueRef c0, c1, c2, step0_ptr, step1_ptr, step2_ptr, counter = NULL; + LLVMBasicBlockRef block; + LLVMBuilderRef builder; + struct lp_build_sampler_soa *sampler; + struct lp_build_interp_soa_context interp; + LLVMValueRef fs_mask[LP_MAX_VECTOR_LENGTH]; + LLVMValueRef fs_out_color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS][LP_MAX_VECTOR_LENGTH]; + LLVMValueRef blend_mask; + LLVMValueRef function; + LLVMValueRef facing; + unsigned num_fs; + unsigned i; + unsigned chan; + unsigned cbuf; + + + /* TODO: actually pick these based on the fs and color buffer + * characteristics. */ + + memset(&fs_type, 0, sizeof fs_type); + fs_type.floating = TRUE; /* floating point values */ + fs_type.sign = TRUE; /* values are signed */ + fs_type.norm = FALSE; /* values are not limited to [0,1] or [-1,1] */ + fs_type.width = 32; /* 32-bit float */ + fs_type.length = 4; /* 4 elements per vector */ + num_fs = 4; /* number of quads per block */ + + memset(&blend_type, 0, sizeof blend_type); + blend_type.floating = FALSE; /* values are integers */ + blend_type.sign = FALSE; /* values are unsigned */ + blend_type.norm = TRUE; /* values are in [0,1] or [-1,1] */ + blend_type.width = 8; /* 8-bit ubyte values */ + blend_type.length = 16; /* 16 elements per vector */ + + /* + * Generate the function prototype. Any change here must be reflected in + * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa. + */ + + fs_elem_type = lp_build_elem_type(fs_type); + fs_int_vec_type = lp_build_int_vec_type(fs_type); + + blend_vec_type = lp_build_vec_type(blend_type); + + util_snprintf(func_name, sizeof(func_name), "fs%u_variant%u_%s", + shader->no, variant->no, do_tri_test ? "edge" : "whole"); + + arg_types[0] = screen->context_ptr_type; /* context */ + arg_types[1] = LLVMInt32Type(); /* x */ + arg_types[2] = LLVMInt32Type(); /* y */ + arg_types[3] = LLVMFloatType(); /* facing */ + arg_types[4] = LLVMPointerType(fs_elem_type, 0); /* a0 */ + arg_types[5] = LLVMPointerType(fs_elem_type, 0); /* dadx */ + arg_types[6] = LLVMPointerType(fs_elem_type, 0); /* dady */ + arg_types[7] = LLVMPointerType(LLVMPointerType(blend_vec_type, 0), 0); /* color */ + arg_types[8] = LLVMPointerType(fs_int_vec_type, 0); /* depth */ + arg_types[9] = LLVMInt32Type(); /* c0 */ + arg_types[10] = LLVMInt32Type(); /* c1 */ + arg_types[11] = LLVMInt32Type(); /* c2 */ + /* Note: the step arrays are built as int32[16] but we interpret + * them here as int32_vec4[4]. + */ + arg_types[12] = LLVMPointerType(int32_vec4_type, 0);/* step0 */ + arg_types[13] = LLVMPointerType(int32_vec4_type, 0);/* step1 */ + arg_types[14] = LLVMPointerType(int32_vec4_type, 0);/* step2 */ + arg_types[15] = LLVMPointerType(LLVMInt32Type(), 0);/* counter */ + + func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0); + + function = LLVMAddFunction(screen->module, func_name, func_type); + LLVMSetFunctionCallConv(function, LLVMCCallConv); + + variant->function[do_tri_test] = function; + + + /* XXX: need to propagate noalias down into color param now we are + * passing a pointer-to-pointer? + */ + for(i = 0; i < Elements(arg_types); ++i) + if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind) + LLVMAddAttribute(LLVMGetParam(function, i), LLVMNoAliasAttribute); + + context_ptr = LLVMGetParam(function, 0); + x = LLVMGetParam(function, 1); + y = LLVMGetParam(function, 2); + facing = LLVMGetParam(function, 3); + a0_ptr = LLVMGetParam(function, 4); + dadx_ptr = LLVMGetParam(function, 5); + dady_ptr = LLVMGetParam(function, 6); + color_ptr_ptr = LLVMGetParam(function, 7); + depth_ptr = LLVMGetParam(function, 8); + c0 = LLVMGetParam(function, 9); + c1 = LLVMGetParam(function, 10); + c2 = LLVMGetParam(function, 11); + step0_ptr = LLVMGetParam(function, 12); + step1_ptr = LLVMGetParam(function, 13); + step2_ptr = LLVMGetParam(function, 14); + + lp_build_name(context_ptr, "context"); + lp_build_name(x, "x"); + lp_build_name(y, "y"); + lp_build_name(a0_ptr, "a0"); + lp_build_name(dadx_ptr, "dadx"); + lp_build_name(dady_ptr, "dady"); + lp_build_name(color_ptr_ptr, "color_ptr_ptr"); + lp_build_name(depth_ptr, "depth"); + lp_build_name(c0, "c0"); + lp_build_name(c1, "c1"); + lp_build_name(c2, "c2"); + lp_build_name(step0_ptr, "step0"); + lp_build_name(step1_ptr, "step1"); + lp_build_name(step2_ptr, "step2"); + + if (key->occlusion_count) { + counter = LLVMGetParam(function, 15); + lp_build_name(counter, "counter"); + } + + /* + * Function body + */ + + block = LLVMAppendBasicBlock(function, "entry"); + builder = LLVMCreateBuilder(); + LLVMPositionBuilderAtEnd(builder, block); + + /* + * The shader input interpolation info is not explicitely baked in the + * shader key, but everything it derives from (TGSI, and flatshade) is + * already included in the shader key. + */ + lp_build_interp_soa_init(&interp, + lp->num_inputs, + lp->inputs, + builder, fs_type, + a0_ptr, dadx_ptr, dady_ptr, + x, y); + + /* code generated texture sampling */ + sampler = lp_llvm_sampler_soa_create(key->sampler, context_ptr); + + /* loop over quads in the block */ + for(i = 0; i < num_fs; ++i) { + LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0); + LLVMValueRef out_color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS]; + LLVMValueRef depth_ptr_i; + + if(i != 0) + lp_build_interp_soa_update(&interp, i); + + depth_ptr_i = LLVMBuildGEP(builder, depth_ptr, &index, 1, ""); + + generate_fs(lp, shader, key, + builder, + fs_type, + context_ptr, + i, + &interp, + sampler, + &fs_mask[i], /* output */ + out_color, + depth_ptr_i, + facing, + do_tri_test, + c0, c1, c2, + step0_ptr, step1_ptr, step2_ptr, counter); + + for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) + for(chan = 0; chan < NUM_CHANNELS; ++chan) + fs_out_color[cbuf][chan][i] = out_color[cbuf][chan]; + } + + sampler->destroy(sampler); + + /* Loop over color outputs / color buffers to do blending. + */ + for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { + LLVMValueRef color_ptr; + LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), cbuf, 0); + LLVMValueRef blend_in_color[NUM_CHANNELS]; + unsigned rt; + + /* + * Convert the fs's output color and mask to fit to the blending type. + */ + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + lp_build_conv(builder, fs_type, blend_type, + fs_out_color[cbuf][chan], num_fs, + &blend_in_color[chan], 1); + lp_build_name(blend_in_color[chan], "color%d.%c", cbuf, "rgba"[chan]); + } + + lp_build_conv_mask(builder, fs_type, blend_type, + fs_mask, num_fs, + &blend_mask, 1); + + color_ptr = LLVMBuildLoad(builder, + LLVMBuildGEP(builder, color_ptr_ptr, &index, 1, ""), + ""); + lp_build_name(color_ptr, "color_ptr%d", cbuf); + + /* which blend/colormask state to use */ + rt = key->blend.independent_blend_enable ? cbuf : 0; + + /* + * Blending. + */ + generate_blend(&key->blend, + rt, + builder, + blend_type, + context_ptr, + blend_mask, + blend_in_color, + color_ptr); + } + + LLVMBuildRetVoid(builder); + + LLVMDisposeBuilder(builder); + + + /* Verify the LLVM IR. If invalid, dump and abort */ +#ifdef DEBUG + if(LLVMVerifyFunction(function, LLVMPrintMessageAction)) { + if (1) + lp_debug_dump_value(function); + abort(); + } +#endif + + /* Apply optimizations to LLVM IR */ + if (1) + LLVMRunFunctionPassManager(screen->pass, function); + + if (gallivm_debug & GALLIVM_DEBUG_IR) { + /* Print the LLVM IR to stderr */ + lp_debug_dump_value(function); + debug_printf("\n"); + } + + /* + * Translate the LLVM IR into machine code. + */ + { + void *f = LLVMGetPointerToGlobal(screen->engine, function); + + variant->jit_function[do_tri_test] = (lp_jit_frag_func)pointer_to_func(f); + + if (gallivm_debug & GALLIVM_DEBUG_ASM) { + lp_disassemble(f); + } + } +} + + +static void +dump_fs_variant_key(const struct lp_fragment_shader_variant_key *key) +{ + unsigned i; + + debug_printf("fs variant %p:\n", (void *) key); + + if (key->depth.enabled) { + debug_printf("depth.format = %s\n", util_format_name(key->zsbuf_format)); + debug_printf("depth.func = %s\n", util_dump_func(key->depth.func, TRUE)); + debug_printf("depth.writemask = %u\n", key->depth.writemask); + } + + for (i = 0; i < 2; ++i) { + if (key->stencil[i].enabled) { + debug_printf("stencil[%u].func = %s\n", i, util_dump_func(key->stencil[i].func, TRUE)); + debug_printf("stencil[%u].fail_op = %s\n", i, util_dump_stencil_op(key->stencil[i].fail_op, TRUE)); + debug_printf("stencil[%u].zpass_op = %s\n", i, util_dump_stencil_op(key->stencil[i].zpass_op, TRUE)); + debug_printf("stencil[%u].zfail_op = %s\n", i, util_dump_stencil_op(key->stencil[i].zfail_op, TRUE)); + debug_printf("stencil[%u].valuemask = 0x%x\n", i, key->stencil[i].valuemask); + debug_printf("stencil[%u].writemask = 0x%x\n", i, key->stencil[i].writemask); + } + } + + if (key->alpha.enabled) { + debug_printf("alpha.func = %s\n", util_dump_func(key->alpha.func, TRUE)); + debug_printf("alpha.ref_value = %f\n", key->alpha.ref_value); + } + + if (key->blend.logicop_enable) { + debug_printf("blend.logicop_func = %s\n", util_dump_logicop(key->blend.logicop_func, TRUE)); + } + else if (key->blend.rt[0].blend_enable) { + debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key->blend.rt[0].rgb_func, TRUE)); + debug_printf("blend.rgb_src_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].rgb_src_factor, TRUE)); + debug_printf("blend.rgb_dst_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].rgb_dst_factor, TRUE)); + debug_printf("blend.alpha_func = %s\n", util_dump_blend_func (key->blend.rt[0].alpha_func, TRUE)); + debug_printf("blend.alpha_src_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].alpha_src_factor, TRUE)); + debug_printf("blend.alpha_dst_factor = %s\n", util_dump_blend_factor(key->blend.rt[0].alpha_dst_factor, TRUE)); + } + debug_printf("blend.colormask = 0x%x\n", key->blend.rt[0].colormask); + for (i = 0; i < PIPE_MAX_SAMPLERS; ++i) { + if (key->sampler[i].format) { + debug_printf("sampler[%u] = \n", i); + debug_printf(" .format = %s\n", + util_format_name(key->sampler[i].format)); + debug_printf(" .target = %s\n", + util_dump_tex_target(key->sampler[i].target, TRUE)); + debug_printf(" .pot = %u %u %u\n", + key->sampler[i].pot_width, + key->sampler[i].pot_height, + key->sampler[i].pot_depth); + debug_printf(" .wrap = %s %s %s\n", + util_dump_tex_wrap(key->sampler[i].wrap_s, TRUE), + util_dump_tex_wrap(key->sampler[i].wrap_t, TRUE), + util_dump_tex_wrap(key->sampler[i].wrap_r, TRUE)); + debug_printf(" .min_img_filter = %s\n", + util_dump_tex_filter(key->sampler[i].min_img_filter, TRUE)); + debug_printf(" .min_mip_filter = %s\n", + util_dump_tex_mipfilter(key->sampler[i].min_mip_filter, TRUE)); + debug_printf(" .mag_img_filter = %s\n", + util_dump_tex_filter(key->sampler[i].mag_img_filter, TRUE)); + if (key->sampler[i].compare_mode != PIPE_TEX_COMPARE_NONE) + debug_printf(" .compare_func = %s\n", util_dump_func(key->sampler[i].compare_func, TRUE)); + debug_printf(" .normalized_coords = %u\n", key->sampler[i].normalized_coords); + } + } +} + + + +static struct lp_fragment_shader_variant * +generate_variant(struct llvmpipe_context *lp, + struct lp_fragment_shader *shader, + const struct lp_fragment_shader_variant_key *key) +{ + struct lp_fragment_shader_variant *variant; + + variant = CALLOC_STRUCT(lp_fragment_shader_variant); + if(!variant) + return NULL; + + variant->shader = shader; + variant->list_item_global.base = variant; + variant->list_item_local.base = variant; + variant->no = shader->variants_created++; + + memcpy(&variant->key, key, sizeof *key); + + if (gallivm_debug & GALLIVM_DEBUG_IR) { + debug_printf("llvmpipe: Creating fragment shader #%u variant #%u:\n", + shader->no, variant->no); + tgsi_dump(shader->base.tokens, 0); + dump_fs_variant_key(key); + } + + generate_fragment(lp, shader, variant, RAST_WHOLE); + generate_fragment(lp, shader, variant, RAST_EDGE_TEST); + + /* TODO: most of these can be relaxed, in particular the colormask */ + variant->opaque = + !key->blend.logicop_enable && + !key->blend.rt[0].blend_enable && + key->blend.rt[0].colormask == 0xf && + !key->stencil[0].enabled && + !key->alpha.enabled && + !key->depth.enabled && + !key->scissor && + !shader->info.uses_kill + ? TRUE : FALSE; + + return variant; +} + + +static void * +llvmpipe_create_fs_state(struct pipe_context *pipe, + const struct pipe_shader_state *templ) +{ + struct lp_fragment_shader *shader; + + shader = CALLOC_STRUCT(lp_fragment_shader); + if (!shader) + return NULL; + + shader->no = fs_no++; + make_empty_list(&shader->variants); + + /* get/save the summary info for this shader */ + tgsi_scan_shader(templ->tokens, &shader->info); + + /* we need to keep a local copy of the tokens */ + shader->base.tokens = tgsi_dup_tokens(templ->tokens); + + if (LP_DEBUG & DEBUG_TGSI) { + unsigned attrib; + debug_printf("llvmpipe: Create fragment shader #%u %p:\n", shader->no, (void *) shader); + tgsi_dump(templ->tokens, 0); + debug_printf("usage masks:\n"); + for (attrib = 0; attrib < shader->info.num_inputs; ++attrib) { + unsigned usage_mask = shader->info.input_usage_mask[attrib]; + debug_printf(" IN[%u].%s%s%s%s\n", + attrib, + usage_mask & TGSI_WRITEMASK_X ? "x" : "", + usage_mask & TGSI_WRITEMASK_Y ? "y" : "", + usage_mask & TGSI_WRITEMASK_Z ? "z" : "", + usage_mask & TGSI_WRITEMASK_W ? "w" : ""); + } + debug_printf("\n"); + } + + return shader; +} + + +static void +llvmpipe_bind_fs_state(struct pipe_context *pipe, void *fs) +{ + struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); + + if (llvmpipe->fs == fs) + return; + + draw_flush(llvmpipe->draw); + + llvmpipe->fs = fs; + + llvmpipe->dirty |= LP_NEW_FS; +} + +static void +remove_shader_variant(struct llvmpipe_context *lp, + struct lp_fragment_shader_variant *variant) +{ + struct llvmpipe_screen *screen = llvmpipe_screen(lp->pipe.screen); + unsigned i; + + if (gallivm_debug & GALLIVM_DEBUG_IR) { + debug_printf("llvmpipe: del fs #%u var #%u v created #%u v cached #%u v total cached #%u\n", + variant->shader->no, variant->no, variant->shader->variants_created, + variant->shader->variants_cached, lp->nr_fs_variants); + } + for (i = 0; i < Elements(variant->function); i++) { + if (variant->function[i]) { + if (variant->jit_function[i]) + LLVMFreeMachineCodeForFunction(screen->engine, + variant->function[i]); + LLVMDeleteFunction(variant->function[i]); + } + } + remove_from_list(&variant->list_item_local); + variant->shader->variants_cached--; + remove_from_list(&variant->list_item_global); + lp->nr_fs_variants--; + FREE(variant); +} + +static void +llvmpipe_delete_fs_state(struct pipe_context *pipe, void *fs) +{ + struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); + struct pipe_fence_handle *fence = NULL; + struct lp_fragment_shader *shader = fs; + struct lp_fs_variant_list_item *li; + + assert(fs != llvmpipe->fs); + (void) llvmpipe; + + /* + * XXX: we need to flush the context until we have some sort of reference + * counting in fragment shaders as they may still be binned + * Flushing alone might not sufficient we need to wait on it too. + */ + + llvmpipe_flush(pipe, 0, &fence); + + if (fence) { + pipe->screen->fence_finish(pipe->screen, fence, 0); + pipe->screen->fence_reference(pipe->screen, &fence, NULL); + } + + li = first_elem(&shader->variants); + while(!at_end(&shader->variants, li)) { + struct lp_fs_variant_list_item *next = next_elem(li); + remove_shader_variant(llvmpipe, li->base); + li = next; + } + + assert(shader->variants_cached == 0); + FREE((void *) shader->base.tokens); + FREE(shader); +} + + + +static void +llvmpipe_set_constant_buffer(struct pipe_context *pipe, + uint shader, uint index, + struct pipe_resource *constants) +{ + struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); + unsigned size = constants ? constants->width0 : 0; + const void *data = constants ? llvmpipe_resource_data(constants) : NULL; + + assert(shader < PIPE_SHADER_TYPES); + assert(index < PIPE_MAX_CONSTANT_BUFFERS); + + if(llvmpipe->constants[shader][index] == constants) + return; + + draw_flush(llvmpipe->draw); + + /* note: reference counting */ + pipe_resource_reference(&llvmpipe->constants[shader][index], constants); + + if(shader == PIPE_SHADER_VERTEX || + shader == PIPE_SHADER_GEOMETRY) { + draw_set_mapped_constant_buffer(llvmpipe->draw, shader, + index, data, size); + } + + llvmpipe->dirty |= LP_NEW_CONSTANTS; +} + + +/** + * Return the blend factor equivalent to a destination alpha of one. + */ +static INLINE unsigned +force_dst_alpha_one(unsigned factor, boolean alpha) +{ + switch(factor) { + case PIPE_BLENDFACTOR_DST_ALPHA: + return PIPE_BLENDFACTOR_ONE; + case PIPE_BLENDFACTOR_INV_DST_ALPHA: + return PIPE_BLENDFACTOR_ZERO; + case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: + return PIPE_BLENDFACTOR_ZERO; + } + + if (alpha) { + switch(factor) { + case PIPE_BLENDFACTOR_DST_COLOR: + return PIPE_BLENDFACTOR_ONE; + case PIPE_BLENDFACTOR_INV_DST_COLOR: + return PIPE_BLENDFACTOR_ZERO; + } + } + + return factor; +} + + +/** + * We need to generate several variants of the fragment pipeline to match + * all the combinations of the contributing state atoms. + * + * TODO: there is actually no reason to tie this to context state -- the + * generated code could be cached globally in the screen. + */ +static void +make_variant_key(struct llvmpipe_context *lp, + struct lp_fragment_shader *shader, + struct lp_fragment_shader_variant_key *key) +{ + unsigned i; + + memset(key, 0, sizeof *key); + + if (lp->framebuffer.zsbuf) { + if (lp->depth_stencil->depth.enabled) { + key->zsbuf_format = lp->framebuffer.zsbuf->format; + memcpy(&key->depth, &lp->depth_stencil->depth, sizeof key->depth); + } + if (lp->depth_stencil->stencil[0].enabled) { + key->zsbuf_format = lp->framebuffer.zsbuf->format; + memcpy(&key->stencil, &lp->depth_stencil->stencil, sizeof key->stencil); + } + } + + key->alpha.enabled = lp->depth_stencil->alpha.enabled; + if(key->alpha.enabled) + key->alpha.func = lp->depth_stencil->alpha.func; + /* alpha.ref_value is passed in jit_context */ + + key->flatshade = lp->rasterizer->flatshade; + key->scissor = lp->rasterizer->scissor; + if (lp->active_query_count) { + key->occlusion_count = TRUE; + } + + if (lp->framebuffer.nr_cbufs) { + memcpy(&key->blend, lp->blend, sizeof key->blend); + } + + key->nr_cbufs = lp->framebuffer.nr_cbufs; + for (i = 0; i < lp->framebuffer.nr_cbufs; i++) { + struct pipe_rt_blend_state *blend_rt = &key->blend.rt[i]; + const struct util_format_description *format_desc; + unsigned chan; + + format_desc = util_format_description(lp->framebuffer.cbufs[i]->format); + assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || + format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB); + + blend_rt->colormask = lp->blend->rt[i].colormask; + + /* mask out color channels not present in the color buffer. + * Should be simple to incorporate per-cbuf writemasks: + */ + for(chan = 0; chan < 4; ++chan) { + enum util_format_swizzle swizzle = format_desc->swizzle[chan]; + + if(swizzle > UTIL_FORMAT_SWIZZLE_W) + blend_rt->colormask &= ~(1 << chan); + } + + /* + * Our swizzled render tiles always have an alpha channel, but the linear + * render target format often does not, so force here the dst alpha to be + * one. + * + * This is not a mere optimization. Wrong results will be produced if the + * dst alpha is used, the dst format does not have alpha, and the previous + * rendering was not flushed from the swizzled to linear buffer. For + * example, NonPowTwo DCT. + * + * TODO: This should be generalized to all channels for better + * performance, but only alpha causes correctness issues. + */ + if (format_desc->swizzle[3] > UTIL_FORMAT_SWIZZLE_W) { + blend_rt->rgb_src_factor = force_dst_alpha_one(blend_rt->rgb_src_factor, FALSE); + blend_rt->rgb_dst_factor = force_dst_alpha_one(blend_rt->rgb_dst_factor, FALSE); + blend_rt->alpha_src_factor = force_dst_alpha_one(blend_rt->alpha_src_factor, TRUE); + blend_rt->alpha_dst_factor = force_dst_alpha_one(blend_rt->alpha_dst_factor, TRUE); + } + } + + for(i = 0; i < PIPE_MAX_SAMPLERS; ++i) + if(shader->info.file_mask[TGSI_FILE_SAMPLER] & (1 << i)) + lp_sampler_static_state(&key->sampler[i], lp->fragment_sampler_views[i], lp->sampler[i]); +} + +/** + * Update fragment state. This is called just prior to drawing + * something when some fragment-related state has changed. + */ +void +llvmpipe_update_fs(struct llvmpipe_context *lp) +{ + struct lp_fragment_shader *shader = lp->fs; + struct lp_fragment_shader_variant_key key; + struct lp_fragment_shader_variant *variant = NULL; + struct lp_fs_variant_list_item *li; + + make_variant_key(lp, shader, &key); + + li = first_elem(&shader->variants); + while(!at_end(&shader->variants, li)) { + if(memcmp(&li->base->key, &key, sizeof key) == 0) { + variant = li->base; + break; + } + li = next_elem(li); + } + + if (variant) { + move_to_head(&lp->fs_variants_list, &variant->list_item_global); + } + else { + int64_t t0, t1; + int64_t dt; + unsigned i; + if (lp->nr_fs_variants >= LP_MAX_SHADER_VARIANTS) { + struct pipe_context *pipe = &lp->pipe; + struct pipe_fence_handle *fence = NULL; + + /* + * XXX: we need to flush the context until we have some sort of reference + * counting in fragment shaders as they may still be binned + * Flushing alone might not be sufficient we need to wait on it too. + */ + llvmpipe_flush(pipe, 0, &fence); + + if (fence) { + pipe->screen->fence_finish(pipe->screen, fence, 0); + pipe->screen->fence_reference(pipe->screen, &fence, NULL); + } + for (i = 0; i < LP_MAX_SHADER_VARIANTS / 4; i++) { + struct lp_fs_variant_list_item *item = last_elem(&lp->fs_variants_list); + remove_shader_variant(lp, item->base); + } + } + t0 = os_time_get(); + + variant = generate_variant(lp, shader, &key); + + t1 = os_time_get(); + dt = t1 - t0; + LP_COUNT_ADD(llvm_compile_time, dt); + LP_COUNT_ADD(nr_llvm_compiles, 2); /* emit vs. omit in/out test */ + + if (variant) { + insert_at_head(&shader->variants, &variant->list_item_local); + insert_at_head(&lp->fs_variants_list, &variant->list_item_global); + lp->nr_fs_variants++; + shader->variants_cached++; + } + } + + lp_setup_set_fs_variant(lp->setup, variant); +} + + + +void +llvmpipe_init_fs_funcs(struct llvmpipe_context *llvmpipe) +{ + llvmpipe->pipe.create_fs_state = llvmpipe_create_fs_state; + llvmpipe->pipe.bind_fs_state = llvmpipe_bind_fs_state; + llvmpipe->pipe.delete_fs_state = llvmpipe_delete_fs_state; + + llvmpipe->pipe.set_constant_buffer = llvmpipe_set_constant_buffer; +} |