| /************************************************************************** |
| * |
| * Copyright 2010 VMware, Inc. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * THE 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 |
| * THE COPYRIGHT HOLDERS, AUTHORS 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. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| **************************************************************************/ |
| |
| |
| #include "util/u_memory.h" |
| #include "util/u_math.h" |
| #include "tgsi/tgsi_parse.h" |
| #include "tgsi/tgsi_util.h" |
| #include "tgsi/tgsi_dump.h" |
| #include "tgsi/tgsi_strings.h" |
| #include "lp_bld_debug.h" |
| #include "lp_bld_tgsi.h" |
| |
| |
| /** |
| * Analysis context. |
| * |
| * This is where we keep store the value of each channel of the IMM/TEMP/OUT |
| * register values, as we walk the shader. |
| */ |
| struct analysis_context |
| { |
| struct lp_tgsi_info *info; |
| |
| unsigned num_imms; |
| float imm[128][4]; |
| |
| struct lp_tgsi_channel_info temp[32][4]; |
| }; |
| |
| |
| /** |
| * Describe the specified channel of the src register. |
| */ |
| static void |
| analyse_src(struct analysis_context *ctx, |
| struct lp_tgsi_channel_info *chan_info, |
| const struct tgsi_src_register *src, |
| unsigned chan) |
| { |
| chan_info->file = TGSI_FILE_NULL; |
| if (!src->Indirect && !src->Absolute && !src->Negate) { |
| unsigned swizzle = tgsi_util_get_src_register_swizzle(src, chan); |
| if (src->File == TGSI_FILE_TEMPORARY) { |
| if (src->Index < Elements(ctx->temp)) { |
| *chan_info = ctx->temp[src->Index][swizzle]; |
| } |
| } else { |
| chan_info->file = src->File; |
| if (src->File == TGSI_FILE_IMMEDIATE) { |
| assert(src->Index < Elements(ctx->imm)); |
| if (src->Index < Elements(ctx->imm)) { |
| chan_info->u.value = ctx->imm[src->Index][swizzle]; |
| } |
| } else { |
| chan_info->u.index = src->Index; |
| chan_info->swizzle = swizzle; |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * Whether this register channel refers to a specific immediate value. |
| */ |
| static boolean |
| is_immediate(const struct lp_tgsi_channel_info *chan_info, float value) |
| { |
| return chan_info->file == TGSI_FILE_IMMEDIATE && |
| chan_info->u.value == value; |
| } |
| |
| |
| static void |
| analyse_tex(struct analysis_context *ctx, |
| const struct tgsi_full_instruction *inst, |
| enum lp_build_tex_modifier modifier) |
| { |
| struct lp_tgsi_info *info = ctx->info; |
| unsigned chan; |
| |
| if (info->num_texs < Elements(info->tex)) { |
| struct lp_tgsi_texture_info *tex_info = &info->tex[info->num_texs]; |
| boolean indirect = FALSE; |
| unsigned readmask = 0; |
| |
| tex_info->target = inst->Texture.Texture; |
| switch (inst->Texture.Texture) { |
| case TGSI_TEXTURE_1D: |
| readmask = TGSI_WRITEMASK_X; |
| break; |
| case TGSI_TEXTURE_1D_ARRAY: |
| case TGSI_TEXTURE_2D: |
| case TGSI_TEXTURE_RECT: |
| readmask = TGSI_WRITEMASK_XY; |
| break; |
| case TGSI_TEXTURE_SHADOW1D: |
| case TGSI_TEXTURE_SHADOW1D_ARRAY: |
| case TGSI_TEXTURE_SHADOW2D: |
| case TGSI_TEXTURE_SHADOWRECT: |
| case TGSI_TEXTURE_2D_ARRAY: |
| case TGSI_TEXTURE_3D: |
| case TGSI_TEXTURE_CUBE: |
| readmask = TGSI_WRITEMASK_XYZ; |
| break; |
| case TGSI_TEXTURE_SHADOW2D_ARRAY: |
| readmask = TGSI_WRITEMASK_XYZW; |
| break; |
| default: |
| assert(0); |
| return; |
| } |
| |
| if (modifier == LP_BLD_TEX_MODIFIER_EXPLICIT_DERIV) { |
| /* We don't track explicit derivatives, although we could */ |
| indirect = TRUE; |
| tex_info->unit = inst->Src[3].Register.Index; |
| } else { |
| if (modifier == LP_BLD_TEX_MODIFIER_PROJECTED || |
| modifier == LP_BLD_TEX_MODIFIER_LOD_BIAS || |
| modifier == LP_BLD_TEX_MODIFIER_EXPLICIT_LOD) { |
| readmask |= TGSI_WRITEMASK_W; |
| } |
| tex_info->unit = inst->Src[1].Register.Index; |
| } |
| |
| for (chan = 0; chan < 4; ++chan) { |
| struct lp_tgsi_channel_info *chan_info = &tex_info->coord[chan]; |
| if (readmask & (1 << chan)) { |
| analyse_src(ctx, chan_info, &inst->Src[0].Register, chan); |
| if (chan_info->file != TGSI_FILE_INPUT) { |
| indirect = TRUE; |
| } |
| } else { |
| memset(chan_info, 0, sizeof *chan_info); |
| } |
| } |
| |
| if (indirect) { |
| info->indirect_textures = TRUE; |
| } |
| |
| ++info->num_texs; |
| } else { |
| info->indirect_textures = TRUE; |
| } |
| } |
| |
| |
| /** |
| * Process an instruction, and update the register values accordingly. |
| */ |
| static void |
| analyse_instruction(struct analysis_context *ctx, |
| struct tgsi_full_instruction *inst) |
| { |
| struct lp_tgsi_info *info = ctx->info; |
| struct lp_tgsi_channel_info (*regs)[4]; |
| unsigned max_regs; |
| unsigned i; |
| unsigned index; |
| unsigned chan; |
| |
| for (i = 0; i < inst->Instruction.NumDstRegs; ++i) { |
| const struct tgsi_dst_register *dst = &inst->Dst[i].Register; |
| |
| /* |
| * Get the lp_tgsi_channel_info array corresponding to the destination |
| * register file. |
| */ |
| |
| if (dst->File == TGSI_FILE_TEMPORARY) { |
| regs = ctx->temp; |
| max_regs = Elements(ctx->temp); |
| } else if (dst->File == TGSI_FILE_OUTPUT) { |
| regs = info->output; |
| max_regs = Elements(info->output); |
| } else if (dst->File == TGSI_FILE_ADDRESS || |
| dst->File == TGSI_FILE_PREDICATE) { |
| continue; |
| } else { |
| assert(0); |
| continue; |
| } |
| |
| /* |
| * Detect direct TEX instructions |
| */ |
| |
| switch (inst->Instruction.Opcode) { |
| case TGSI_OPCODE_TEX: |
| analyse_tex(ctx, inst, LP_BLD_TEX_MODIFIER_NONE); |
| break; |
| case TGSI_OPCODE_TXD: |
| analyse_tex(ctx, inst, LP_BLD_TEX_MODIFIER_EXPLICIT_DERIV); |
| break; |
| case TGSI_OPCODE_TXB: |
| analyse_tex(ctx, inst, LP_BLD_TEX_MODIFIER_LOD_BIAS); |
| break; |
| case TGSI_OPCODE_TXL: |
| analyse_tex(ctx, inst, LP_BLD_TEX_MODIFIER_EXPLICIT_LOD); |
| break; |
| case TGSI_OPCODE_TXP: |
| analyse_tex(ctx, inst, LP_BLD_TEX_MODIFIER_PROJECTED); |
| break; |
| default: |
| break; |
| } |
| |
| /* |
| * Keep track of assignments and writes |
| */ |
| |
| if (dst->Indirect) { |
| /* |
| * It could be any register index so clear all register indices. |
| */ |
| |
| for (chan = 0; chan < 4; ++chan) { |
| if (dst->WriteMask & (1 << chan)) { |
| for (index = 0; index < max_regs; ++index) { |
| regs[index][chan].file = TGSI_FILE_NULL; |
| } |
| } |
| } |
| } else if (dst->Index < max_regs) { |
| /* |
| * Update this destination register value. |
| */ |
| |
| struct lp_tgsi_channel_info res[4]; |
| |
| memset(res, 0, sizeof res); |
| |
| if (!inst->Instruction.Predicate && |
| !inst->Instruction.Saturate) { |
| for (chan = 0; chan < 4; ++chan) { |
| if (dst->WriteMask & (1 << chan)) { |
| if (inst->Instruction.Opcode == TGSI_OPCODE_MOV) { |
| analyse_src(ctx, &res[chan], |
| &inst->Src[0].Register, chan); |
| } else if (inst->Instruction.Opcode == TGSI_OPCODE_MUL) { |
| /* |
| * Propagate values across 1.0 and 0.0 multiplications. |
| */ |
| |
| struct lp_tgsi_channel_info src0; |
| struct lp_tgsi_channel_info src1; |
| |
| analyse_src(ctx, &src0, &inst->Src[0].Register, chan); |
| analyse_src(ctx, &src1, &inst->Src[1].Register, chan); |
| |
| if (is_immediate(&src0, 0.0f)) { |
| res[chan] = src0; |
| } else if (is_immediate(&src1, 0.0f)) { |
| res[chan] = src1; |
| } else if (is_immediate(&src0, 1.0f)) { |
| res[chan] = src1; |
| } else if (is_immediate(&src1, 1.0f)) { |
| res[chan] = src0; |
| } |
| } |
| } |
| } |
| } |
| |
| for (chan = 0; chan < 4; ++chan) { |
| if (dst->WriteMask & (1 << chan)) { |
| regs[dst->Index][chan] = res[chan]; |
| } |
| } |
| } |
| } |
| |
| /* |
| * Clear all temporaries information in presence of a control flow opcode. |
| */ |
| |
| switch (inst->Instruction.Opcode) { |
| case TGSI_OPCODE_IF: |
| case TGSI_OPCODE_IFC: |
| case TGSI_OPCODE_ELSE: |
| case TGSI_OPCODE_ENDIF: |
| case TGSI_OPCODE_BGNLOOP: |
| case TGSI_OPCODE_BRK: |
| case TGSI_OPCODE_BREAKC: |
| case TGSI_OPCODE_CONT: |
| case TGSI_OPCODE_ENDLOOP: |
| case TGSI_OPCODE_CALLNZ: |
| case TGSI_OPCODE_CAL: |
| case TGSI_OPCODE_BGNSUB: |
| case TGSI_OPCODE_ENDSUB: |
| case TGSI_OPCODE_SWITCH: |
| case TGSI_OPCODE_CASE: |
| case TGSI_OPCODE_DEFAULT: |
| case TGSI_OPCODE_ENDSWITCH: |
| case TGSI_OPCODE_RET: |
| case TGSI_OPCODE_END: |
| /* XXX: Are there more cases? */ |
| memset(&ctx->temp, 0, sizeof ctx->temp); |
| memset(&info->output, 0, sizeof info->output); |
| default: |
| break; |
| } |
| } |
| |
| |
| static INLINE void |
| dump_info(const struct tgsi_token *tokens, |
| struct lp_tgsi_info *info) |
| { |
| unsigned index; |
| unsigned chan; |
| |
| tgsi_dump(tokens, 0); |
| |
| for (index = 0; index < info->num_texs; ++index) { |
| const struct lp_tgsi_texture_info *tex_info = &info->tex[index]; |
| debug_printf("TEX[%u] =", index); |
| for (chan = 0; chan < 4; ++chan) { |
| const struct lp_tgsi_channel_info *chan_info = |
| &tex_info->coord[chan]; |
| if (chan_info->file != TGSI_FILE_NULL) { |
| debug_printf(" %s[%u].%c", |
| tgsi_file_names[chan_info->file], |
| chan_info->u.index, |
| "xyzw01"[chan_info->swizzle]); |
| } else { |
| debug_printf(" _"); |
| } |
| } |
| debug_printf(", SAMP[%u], %s\n", |
| tex_info->unit, |
| tgsi_texture_names[tex_info->target]); |
| } |
| |
| for (index = 0; index < PIPE_MAX_SHADER_OUTPUTS; ++index) { |
| for (chan = 0; chan < 4; ++chan) { |
| const struct lp_tgsi_channel_info *chan_info = |
| &info->output[index][chan]; |
| if (chan_info->file != TGSI_FILE_NULL) { |
| debug_printf("OUT[%u].%c = ", index, "xyzw"[chan]); |
| if (chan_info->file == TGSI_FILE_IMMEDIATE) { |
| debug_printf("%f", chan_info->u.value); |
| } else { |
| const char *file_name; |
| switch (chan_info->file) { |
| case TGSI_FILE_CONSTANT: |
| file_name = "CONST"; |
| break; |
| case TGSI_FILE_INPUT: |
| file_name = "IN"; |
| break; |
| default: |
| file_name = "???"; |
| break; |
| } |
| debug_printf("%s[%u].%c", |
| file_name, |
| chan_info->u.index, |
| "xyzw01"[chan_info->swizzle]); |
| } |
| debug_printf("\n"); |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * Detect any direct relationship between the output color |
| */ |
| void |
| lp_build_tgsi_info(const struct tgsi_token *tokens, |
| struct lp_tgsi_info *info) |
| { |
| struct tgsi_parse_context parse; |
| struct analysis_context ctx; |
| unsigned index; |
| unsigned chan; |
| |
| memset(info, 0, sizeof *info); |
| |
| tgsi_scan_shader(tokens, &info->base); |
| |
| memset(&ctx, 0, sizeof ctx); |
| ctx.info = info; |
| |
| tgsi_parse_init(&parse, tokens); |
| |
| while (!tgsi_parse_end_of_tokens(&parse)) { |
| tgsi_parse_token(&parse); |
| |
| switch (parse.FullToken.Token.Type) { |
| case TGSI_TOKEN_TYPE_DECLARATION: |
| break; |
| |
| case TGSI_TOKEN_TYPE_INSTRUCTION: |
| { |
| struct tgsi_full_instruction *inst = |
| &parse.FullToken.FullInstruction; |
| |
| if (inst->Instruction.Opcode == TGSI_OPCODE_END || |
| inst->Instruction.Opcode == TGSI_OPCODE_BGNSUB) { |
| /* We reached the end of main function body. */ |
| goto finished; |
| } |
| |
| analyse_instruction(&ctx, inst); |
| } |
| break; |
| |
| case TGSI_TOKEN_TYPE_IMMEDIATE: |
| { |
| const unsigned size = |
| parse.FullToken.FullImmediate.Immediate.NrTokens - 1; |
| assert(size <= 4); |
| if (ctx.num_imms < Elements(ctx.imm)) { |
| for (chan = 0; chan < size; ++chan) { |
| float value = parse.FullToken.FullImmediate.u[chan].Float; |
| ctx.imm[ctx.num_imms][chan] = value; |
| |
| if (value < 0.0f || value > 1.0f) { |
| info->unclamped_immediates = TRUE; |
| } |
| } |
| ++ctx.num_imms; |
| } |
| } |
| break; |
| |
| case TGSI_TOKEN_TYPE_PROPERTY: |
| break; |
| |
| default: |
| assert(0); |
| } |
| } |
| finished: |
| |
| tgsi_parse_free(&parse); |
| |
| |
| /* |
| * Link the output color values. |
| */ |
| |
| for (index = 0; index < PIPE_MAX_COLOR_BUFS; ++index) { |
| const struct lp_tgsi_channel_info null_output[4]; |
| info->cbuf[index] = null_output; |
| } |
| |
| for (index = 0; index < info->base.num_outputs; ++index) { |
| unsigned semantic_name = info->base.output_semantic_name[index]; |
| unsigned semantic_index = info->base.output_semantic_index[index]; |
| if (semantic_name == TGSI_SEMANTIC_COLOR && |
| semantic_index < PIPE_MAX_COLOR_BUFS) { |
| info->cbuf[semantic_index] = info->output[index]; |
| } |
| } |
| |
| if (gallivm_debug & GALLIVM_DEBUG_TGSI) { |
| dump_info(tokens, info); |
| } |
| } |
