| /************************************************************************** |
| * |
| * 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 (stencil TBI) |
| * - blending |
| * |
| * This file has only the glue to assembly 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_format.h" |
| #include "util/u_debug_dump.h" |
| #include "util/u_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_depth.h" |
| #include "gallivm/lp_bld_interp.h" |
| #include "gallivm/lp_bld_tgsi.h" |
| #include "gallivm/lp_bld_alpha.h" |
| #include "gallivm/lp_bld_blend.h" |
| #include "gallivm/lp_bld_swizzle.h" |
| #include "gallivm/lp_bld_flow.h" |
| #include "gallivm/lp_bld_debug.h" |
| #include "lp_buffer.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" |
| |
| |
| static const unsigned char quad_offset_x[4] = {0, 1, 0, 1}; |
| static const unsigned char quad_offset_y[4] = {0, 0, 1, 1}; |
| |
| |
| /* |
| * Derive from the quad's upper left scalar coordinates the coordinates for |
| * all other quad pixels |
| */ |
| static void |
| generate_pos0(LLVMBuilderRef builder, |
| LLVMValueRef x, |
| LLVMValueRef y, |
| LLVMValueRef *x0, |
| LLVMValueRef *y0) |
| { |
| LLVMTypeRef int_elem_type = LLVMInt32Type(); |
| LLVMTypeRef int_vec_type = LLVMVectorType(int_elem_type, QUAD_SIZE); |
| LLVMTypeRef elem_type = LLVMFloatType(); |
| LLVMTypeRef vec_type = LLVMVectorType(elem_type, QUAD_SIZE); |
| LLVMValueRef x_offsets[QUAD_SIZE]; |
| LLVMValueRef y_offsets[QUAD_SIZE]; |
| unsigned i; |
| |
| x = lp_build_broadcast(builder, int_vec_type, x); |
| y = lp_build_broadcast(builder, int_vec_type, y); |
| |
| for(i = 0; i < QUAD_SIZE; ++i) { |
| x_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_x[i], 0); |
| y_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_y[i], 0); |
| } |
| |
| x = LLVMBuildAdd(builder, x, LLVMConstVector(x_offsets, QUAD_SIZE), ""); |
| y = LLVMBuildAdd(builder, y, LLVMConstVector(y_offsets, QUAD_SIZE), ""); |
| |
| *x0 = LLVMBuildSIToFP(builder, x, vec_type, ""); |
| *y0 = LLVMBuildSIToFP(builder, y, vec_type, ""); |
| } |
| |
| |
| /** |
| * Generate the depth test. |
| */ |
| static void |
| generate_depth(LLVMBuilderRef builder, |
| const struct lp_fragment_shader_variant_key *key, |
| struct lp_type src_type, |
| struct lp_build_mask_context *mask, |
| LLVMValueRef src, |
| LLVMValueRef dst_ptr) |
| { |
| const struct util_format_description *format_desc; |
| struct lp_type dst_type; |
| |
| if(!key->depth.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); |
| |
| 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_test(builder, |
| &key->depth, |
| dst_type, |
| format_desc, |
| mask, |
| src, |
| dst_ptr); |
| } |
| |
| |
| /** |
| * 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, mask_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(); |
| |
| mask_type = LLVMIntType(32 * 4); |
| |
| /* |
| * 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_int_const_scalar(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_int_const_scalar(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, |
| unsigned do_tri_test, |
| LLVMValueRef c0, |
| LLVMValueRef c1, |
| LLVMValueRef c2, |
| LLVMValueRef step0_ptr, |
| LLVMValueRef step1_ptr, |
| LLVMValueRef step2_ptr) |
| { |
| const struct tgsi_token *tokens = shader->base.tokens; |
| LLVMTypeRef elem_type; |
| LLVMTypeRef vec_type; |
| LLVMTypeRef int_vec_type; |
| LLVMValueRef consts_ptr; |
| LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS]; |
| LLVMValueRef z = interp->pos[2]; |
| struct lp_build_flow_context *flow; |
| struct lp_build_mask_context mask; |
| boolean early_depth_test; |
| unsigned attrib; |
| unsigned chan; |
| unsigned cbuf; |
| |
| assert(i < 4); |
| |
| elem_type = lp_build_elem_type(type); |
| vec_type = lp_build_vec_type(type); |
| int_vec_type = lp_build_int_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_test = |
| key->depth.enabled && |
| !key->alpha.enabled && |
| !shader->info.uses_kill && |
| !shader->info.writes_z; |
| |
| if(early_depth_test) |
| generate_depth(builder, key, |
| type, &mask, |
| z, depth_ptr); |
| |
| lp_build_tgsi_soa(builder, tokens, type, &mask, |
| consts_ptr, interp->pos, interp->inputs, |
| outputs, sampler); |
| |
| for (attrib = 0; attrib < shader->info.num_outputs; ++attrib) { |
| for(chan = 0; chan < NUM_CHANNELS; ++chan) { |
| if(outputs[attrib][chan]) { |
| lp_build_name(outputs[attrib][chan], "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(outputs[attrib][chan], "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 = outputs[attrib][chan]; |
| 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] = outputs[attrib][chan]; |
| break; |
| } |
| |
| case TGSI_SEMANTIC_POSITION: |
| if(chan == 2) |
| z = outputs[attrib][chan]; |
| break; |
| } |
| } |
| } |
| } |
| |
| if(!early_depth_test) |
| generate_depth(builder, key, |
| type, &mask, |
| z, depth_ptr); |
| |
| 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. |
| */ |
| static void |
| generate_blend(const struct pipe_blend_state *blend, |
| 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; |
| LLVMTypeRef int_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); |
| int_vec_type = lp_build_int_vec_type(type); |
| |
| const_ptr = lp_jit_context_blend_color(builder, context_ptr); |
| const_ptr = LLVMBuildBitCast(builder, const_ptr, |
| LLVMPointerType(vec_type, 0), ""); |
| |
| 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]); |
| } |
| |
| lp_build_blend_soa(builder, blend, type, src, dst, con, res); |
| |
| for(chan = 0; chan < 4; ++chan) { |
| if(blend->rt[0].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; |
| struct lp_type fs_type; |
| struct lp_type blend_type; |
| LLVMTypeRef fs_elem_type; |
| LLVMTypeRef fs_vec_type; |
| LLVMTypeRef fs_int_vec_type; |
| LLVMTypeRef blend_vec_type; |
| LLVMTypeRef blend_int_vec_type; |
| LLVMTypeRef arg_types[14]; |
| 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; |
| LLVMBasicBlockRef block; |
| LLVMBuilderRef builder; |
| LLVMValueRef x0; |
| LLVMValueRef y0; |
| 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 blend_in_color[NUM_CHANNELS]; |
| LLVMValueRef function; |
| 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_vec_type = lp_build_vec_type(fs_type); |
| fs_int_vec_type = lp_build_int_vec_type(fs_type); |
| |
| blend_vec_type = lp_build_vec_type(blend_type); |
| blend_int_vec_type = lp_build_int_vec_type(blend_type); |
| |
| arg_types[0] = screen->context_ptr_type; /* context */ |
| arg_types[1] = LLVMInt32Type(); /* x */ |
| arg_types[2] = LLVMInt32Type(); /* y */ |
| arg_types[3] = LLVMPointerType(fs_elem_type, 0); /* a0 */ |
| arg_types[4] = LLVMPointerType(fs_elem_type, 0); /* dadx */ |
| arg_types[5] = LLVMPointerType(fs_elem_type, 0); /* dady */ |
| arg_types[6] = LLVMPointerType(LLVMPointerType(blend_vec_type, 0), 0); /* color */ |
| arg_types[7] = LLVMPointerType(fs_int_vec_type, 0); /* depth */ |
| arg_types[8] = LLVMInt32Type(); /* c0 */ |
| arg_types[9] = LLVMInt32Type(); /* c1 */ |
| arg_types[10] = LLVMInt32Type(); /* c2 */ |
| /* Note: the step arrays are built as int32[16] but we interpret |
| * them here as int32_vec4[4]. |
| */ |
| arg_types[11] = LLVMPointerType(int32_vec4_type, 0);/* step0 */ |
| arg_types[12] = LLVMPointerType(int32_vec4_type, 0);/* step1 */ |
| arg_types[13] = LLVMPointerType(int32_vec4_type, 0);/* step2 */ |
| |
| func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0); |
| |
| function = LLVMAddFunction(screen->module, "shader", 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); |
| a0_ptr = LLVMGetParam(function, 3); |
| dadx_ptr = LLVMGetParam(function, 4); |
| dady_ptr = LLVMGetParam(function, 5); |
| color_ptr_ptr = LLVMGetParam(function, 6); |
| depth_ptr = LLVMGetParam(function, 7); |
| c0 = LLVMGetParam(function, 8); |
| c1 = LLVMGetParam(function, 9); |
| c2 = LLVMGetParam(function, 10); |
| step0_ptr = LLVMGetParam(function, 11); |
| step1_ptr = LLVMGetParam(function, 12); |
| step2_ptr = LLVMGetParam(function, 13); |
| |
| 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"); |
| 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"); |
| |
| /* |
| * Function body |
| */ |
| |
| block = LLVMAppendBasicBlock(function, "entry"); |
| builder = LLVMCreateBuilder(); |
| LLVMPositionBuilderAtEnd(builder, block); |
| |
| generate_pos0(builder, x, y, &x0, &y0); |
| |
| lp_build_interp_soa_init(&interp, |
| shader->base.tokens, |
| key->flatshade, |
| builder, fs_type, |
| a0_ptr, dadx_ptr, dady_ptr, |
| x0, y0); |
| |
| /* 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; |
| int cbuf; |
| |
| 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, |
| do_tri_test, |
| c0, c1, c2, |
| step0_ptr, step1_ptr, step2_ptr); |
| |
| 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); |
| |
| /* |
| * 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); |
| |
| /* |
| * Blending. |
| */ |
| generate_blend(&key->blend, |
| 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) |
| LLVMDumpValue(function); |
| abort(); |
| } |
| #endif |
| |
| /* Apply optimizations to LLVM IR */ |
| if (1) |
| LLVMRunFunctionPassManager(screen->pass, function); |
| |
| if (LP_DEBUG & DEBUG_JIT) { |
| /* Print the LLVM IR to stderr */ |
| LLVMDumpValue(function); |
| debug_printf("\n"); |
| } |
| |
| /* |
| * Translate the LLVM IR into machine code. |
| */ |
| variant->jit_function[do_tri_test] = (lp_jit_frag_func)LLVMGetPointerToGlobal(screen->engine, function); |
| |
| if (LP_DEBUG & DEBUG_ASM) |
| lp_disassemble(variant->jit_function[do_tri_test]); |
| } |
| |
| |
| 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; |
| |
| if (LP_DEBUG & DEBUG_JIT) { |
| unsigned i; |
| |
| tgsi_dump(shader->base.tokens, 0); |
| if(key->depth.enabled) { |
| debug_printf("depth.format = %s\n", pf_name(key->zsbuf_format)); |
| debug_printf("depth.func = %s\n", debug_dump_func(key->depth.func, TRUE)); |
| debug_printf("depth.writemask = %u\n", key->depth.writemask); |
| } |
| if(key->alpha.enabled) { |
| debug_printf("alpha.func = %s\n", debug_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 = %u\n", key->blend.logicop_func); |
| } |
| else if(key->blend.rt[0].blend_enable) { |
| debug_printf("blend.rgb_func = %s\n", debug_dump_blend_func (key->blend.rt[0].rgb_func, TRUE)); |
| debug_printf("rgb_src_factor = %s\n", debug_dump_blend_factor(key->blend.rt[0].rgb_src_factor, TRUE)); |
| debug_printf("rgb_dst_factor = %s\n", debug_dump_blend_factor(key->blend.rt[0].rgb_dst_factor, TRUE)); |
| debug_printf("alpha_func = %s\n", debug_dump_blend_func (key->blend.rt[0].alpha_func, TRUE)); |
| debug_printf("alpha_src_factor = %s\n", debug_dump_blend_factor(key->blend.rt[0].alpha_src_factor, TRUE)); |
| debug_printf("alpha_dst_factor = %s\n", debug_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", |
| pf_name(key->sampler[i].format)); |
| debug_printf(" .target = %s\n", |
| debug_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", |
| debug_dump_tex_wrap(key->sampler[i].wrap_s, TRUE), |
| debug_dump_tex_wrap(key->sampler[i].wrap_t, TRUE), |
| debug_dump_tex_wrap(key->sampler[i].wrap_r, TRUE)); |
| debug_printf(" .min_img_filter = %s\n", |
| debug_dump_tex_filter(key->sampler[i].min_img_filter, TRUE)); |
| debug_printf(" .min_mip_filter = %s\n", |
| debug_dump_tex_mipfilter(key->sampler[i].min_mip_filter, TRUE)); |
| debug_printf(" .mag_img_filter = %s\n", |
| debug_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", debug_dump_func(key->sampler[i].compare_func, TRUE)); |
| debug_printf(" .normalized_coords = %u\n", key->sampler[i].normalized_coords); |
| debug_printf(" .prefilter = %u\n", key->sampler[i].prefilter); |
| } |
| } |
| } |
| |
| variant = CALLOC_STRUCT(lp_fragment_shader_variant); |
| if(!variant) |
| return NULL; |
| |
| variant->shader = shader; |
| memcpy(&variant->key, key, sizeof *key); |
| |
| generate_fragment(lp, shader, variant, 0); |
| generate_fragment(lp, shader, variant, 1); |
| |
| /* insert new variant into linked list */ |
| variant->next = shader->variants; |
| shader->variants = variant; |
| |
| return variant; |
| } |
| |
| |
| 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; |
| |
| /* 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); |
| |
| return shader; |
| } |
| |
| |
| 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; |
| } |
| |
| |
| void |
| llvmpipe_delete_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); |
| struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen); |
| struct lp_fragment_shader *shader = fs; |
| struct lp_fragment_shader_variant *variant; |
| |
| assert(fs != llvmpipe->fs); |
| (void) llvmpipe; |
| |
| variant = shader->variants; |
| while(variant) { |
| struct lp_fragment_shader_variant *next = variant->next; |
| unsigned i; |
| |
| 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]); |
| } |
| } |
| |
| FREE(variant); |
| |
| variant = next; |
| } |
| |
| FREE((void *) shader->base.tokens); |
| FREE(shader); |
| } |
| |
| |
| |
| void |
| llvmpipe_set_constant_buffer(struct pipe_context *pipe, |
| uint shader, uint index, |
| struct pipe_buffer *constants) |
| { |
| struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe); |
| unsigned size = constants ? constants->size : 0; |
| const void *data = constants ? llvmpipe_buffer(constants)->data : NULL; |
| |
| assert(shader < PIPE_SHADER_TYPES); |
| assert(index == 0); |
| |
| if(llvmpipe->constants[shader] == constants) |
| return; |
| |
| draw_flush(llvmpipe->draw); |
| |
| /* note: reference counting */ |
| pipe_buffer_reference(&llvmpipe->constants[shader], constants); |
| |
| if(shader == PIPE_SHADER_VERTEX) { |
| draw_set_mapped_constant_buffer(llvmpipe->draw, PIPE_SHADER_VERTEX, 0, |
| data, size); |
| } |
| |
| llvmpipe->dirty |= LP_NEW_CONSTANTS; |
| } |
| |
| |
| /** |
| * 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 && |
| lp->depth_stencil->depth.enabled) { |
| key->zsbuf_format = lp->framebuffer.zsbuf->format; |
| memcpy(&key->depth, &lp->depth_stencil->depth, sizeof key->depth); |
| } |
| |
| 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->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++) { |
| const struct util_format_description *format_desc; |
| unsigned chan; |
| |
| format_desc = util_format_description(lp->framebuffer.cbufs[i]->format); |
| assert(format_desc->layout == UTIL_FORMAT_COLORSPACE_RGB || |
| format_desc->layout == UTIL_FORMAT_COLORSPACE_SRGB); |
| |
| /* 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) |
| key->blend.rt[0].colormask |= (1 << chan); |
| } |
| } |
| |
| 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->texture[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; |
| boolean opaque; |
| |
| make_variant_key(lp, shader, &key); |
| |
| variant = shader->variants; |
| while(variant) { |
| if(memcmp(&variant->key, &key, sizeof key) == 0) |
| break; |
| |
| variant = variant->next; |
| } |
| |
| if (!variant) { |
| struct util_time t0, t1; |
| int64_t dt; |
| util_time_get(&t0); |
| |
| variant = generate_variant(lp, shader, &key); |
| |
| util_time_get(&t1); |
| dt = util_time_diff(&t0, &t1); |
| LP_COUNT_ADD(llvm_compile_time, dt); |
| LP_COUNT_ADD(nr_llvm_compiles, 2); /* emit vs. omit in/out test */ |
| } |
| |
| shader->current = variant; |
| |
| /* TODO: put this in the variant */ |
| /* TODO: most of these can be relaxed, in particular the colormask */ |
| opaque = !key.blend.logicop_enable && |
| !key.blend.rt[0].blend_enable && |
| key.blend.rt[0].colormask == 0xf && |
| !key.alpha.enabled && |
| !key.depth.enabled && |
| !key.scissor && |
| !shader->info.uses_kill |
| ? TRUE : FALSE; |
| |
| lp_setup_set_fs_functions(lp->setup, |
| shader->current->jit_function[0], |
| shader->current->jit_function[1], |
| opaque); |
| } |