/************************************************************************** * * Copyright 2008 VMware, Inc. * All Rights Reserved. * Copyright 2008 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 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 VMWARE 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. * **************************************************************************/ /** * TGSI program scan utility. * Used to determine which registers and instructions are used by a shader. * * Authors: Brian Paul */ #include "util/u_debug.h" #include "util/u_math.h" #include "util/u_memory.h" #include "util/u_prim.h" #include "tgsi/tgsi_parse.h" #include "tgsi/tgsi_util.h" #include "tgsi/tgsi_scan.h" /** * Scan the given TGSI shader to collect information such as number of * registers used, special instructions used, etc. * \return info the result of the scan */ void tgsi_scan_shader(const struct tgsi_token *tokens, struct tgsi_shader_info *info) { uint procType, i; struct tgsi_parse_context parse; memset(info, 0, sizeof(*info)); for (i = 0; i < TGSI_FILE_COUNT; i++) info->file_max[i] = -1; for (i = 0; i < Elements(info->const_file_max); i++) info->const_file_max[i] = -1; /** ** Setup to begin parsing input shader **/ if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) { debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n"); return; } procType = parse.FullHeader.Processor.Processor; assert(procType == TGSI_PROCESSOR_FRAGMENT || procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY || procType == TGSI_PROCESSOR_COMPUTE); info->processor = procType; /** ** Loop over incoming program tokens/instructions */ while( !tgsi_parse_end_of_tokens( &parse ) ) { info->num_tokens++; tgsi_parse_token( &parse ); switch( parse.FullToken.Token.Type ) { case TGSI_TOKEN_TYPE_INSTRUCTION: { const struct tgsi_full_instruction *fullinst = &parse.FullToken.FullInstruction; uint i; assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST); info->opcode_count[fullinst->Instruction.Opcode]++; for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) { const struct tgsi_full_src_register *src = &fullinst->Src[i]; int ind = src->Register.Index; /* Mark which inputs are effectively used */ if (src->Register.File == TGSI_FILE_INPUT) { unsigned usage_mask; usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i); if (src->Register.Indirect) { for (ind = 0; ind < info->num_inputs; ++ind) { info->input_usage_mask[ind] |= usage_mask; } } else { assert(ind >= 0); assert(ind < PIPE_MAX_SHADER_INPUTS); info->input_usage_mask[ind] |= usage_mask; } if (procType == TGSI_PROCESSOR_FRAGMENT && info->reads_position && src->Register.Index == 0 && (src->Register.SwizzleX == TGSI_SWIZZLE_Z || src->Register.SwizzleY == TGSI_SWIZZLE_Z || src->Register.SwizzleZ == TGSI_SWIZZLE_Z || src->Register.SwizzleW == TGSI_SWIZZLE_Z)) { info->reads_z = TRUE; } } /* check for indirect register reads */ if (src->Register.Indirect) { info->indirect_files |= (1 << src->Register.File); } /* MSAA samplers */ if (src->Register.File == TGSI_FILE_SAMPLER) { assert(fullinst->Instruction.Texture); assert(src->Register.Index < Elements(info->is_msaa_sampler)); if (fullinst->Instruction.Texture && (fullinst->Texture.Texture == TGSI_TEXTURE_2D_MSAA || fullinst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA)) { info->is_msaa_sampler[src->Register.Index] = TRUE; } } } /* check for indirect register writes */ for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) { const struct tgsi_full_dst_register *dst = &fullinst->Dst[i]; if (dst->Register.Indirect) { info->indirect_files |= (1 << dst->Register.File); } } info->num_instructions++; } break; case TGSI_TOKEN_TYPE_DECLARATION: { const struct tgsi_full_declaration *fulldecl = &parse.FullToken.FullDeclaration; const uint file = fulldecl->Declaration.File; uint reg; for (reg = fulldecl->Range.First; reg <= fulldecl->Range.Last; reg++) { unsigned semName = fulldecl->Semantic.Name; unsigned semIndex = fulldecl->Semantic.Index; /* only first 32 regs will appear in this bitfield */ info->file_mask[file] |= (1 << reg); info->file_count[file]++; info->file_max[file] = MAX2(info->file_max[file], (int)reg); if (file == TGSI_FILE_CONSTANT) { int buffer = 0; if (fulldecl->Declaration.Dimension) buffer = fulldecl->Dim.Index2D; info->const_file_max[buffer] = MAX2(info->const_file_max[buffer], (int)reg); } else if (file == TGSI_FILE_INPUT) { info->input_semantic_name[reg] = (ubyte) semName; info->input_semantic_index[reg] = (ubyte) semIndex; info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate; info->input_interpolate_loc[reg] = (ubyte)fulldecl->Interp.Location; info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap; info->num_inputs++; if (fulldecl->Interp.Location == TGSI_INTERPOLATE_LOC_CENTROID) info->uses_centroid = TRUE; if (semName == TGSI_SEMANTIC_PRIMID) info->uses_primid = TRUE; else if (procType == TGSI_PROCESSOR_FRAGMENT) { if (semName == TGSI_SEMANTIC_POSITION) info->reads_position = TRUE; else if (semName == TGSI_SEMANTIC_FACE) info->uses_frontface = TRUE; } } else if (file == TGSI_FILE_SYSTEM_VALUE) { unsigned index = fulldecl->Range.First; info->system_value_semantic_name[index] = semName; info->num_system_values = MAX2(info->num_system_values, index + 1); if (semName == TGSI_SEMANTIC_INSTANCEID) { info->uses_instanceid = TRUE; } else if (semName == TGSI_SEMANTIC_VERTEXID) { info->uses_vertexid = TRUE; } else if (semName == TGSI_SEMANTIC_VERTEXID_NOBASE) { info->uses_vertexid_nobase = TRUE; } else if (semName == TGSI_SEMANTIC_BASEVERTEX) { info->uses_basevertex = TRUE; } else if (semName == TGSI_SEMANTIC_PRIMID) { info->uses_primid = TRUE; } } else if (file == TGSI_FILE_OUTPUT) { info->output_semantic_name[reg] = (ubyte) semName; info->output_semantic_index[reg] = (ubyte) semIndex; info->num_outputs++; if (procType == TGSI_PROCESSOR_VERTEX || procType == TGSI_PROCESSOR_GEOMETRY) { if (semName == TGSI_SEMANTIC_CLIPDIST) { info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask); info->clipdist_writemask |= fulldecl->Declaration.UsageMask << (semIndex*4); } else if (semName == TGSI_SEMANTIC_CULLDIST) { info->num_written_culldistance += util_bitcount(fulldecl->Declaration.UsageMask); info->culldist_writemask |= fulldecl->Declaration.UsageMask << (semIndex*4); } else if (semName == TGSI_SEMANTIC_VIEWPORT_INDEX) { info->writes_viewport_index = TRUE; } else if (semName == TGSI_SEMANTIC_LAYER) { info->writes_layer = TRUE; } else if (semName == TGSI_SEMANTIC_PSIZE) { info->writes_psize = TRUE; } else if (semName == TGSI_SEMANTIC_CLIPVERTEX) { info->writes_clipvertex = TRUE; } } if (procType == TGSI_PROCESSOR_FRAGMENT) { if (semName == TGSI_SEMANTIC_POSITION) { info->writes_z = TRUE; } else if (semName == TGSI_SEMANTIC_STENCIL) { info->writes_stencil = TRUE; } } if (procType == TGSI_PROCESSOR_VERTEX) { if (semName == TGSI_SEMANTIC_EDGEFLAG) { info->writes_edgeflag = TRUE; } } } } } break; case TGSI_TOKEN_TYPE_IMMEDIATE: { uint reg = info->immediate_count++; uint file = TGSI_FILE_IMMEDIATE; info->file_mask[file] |= (1 << reg); info->file_count[file]++; info->file_max[file] = MAX2(info->file_max[file], (int)reg); } break; case TGSI_TOKEN_TYPE_PROPERTY: { const struct tgsi_full_property *fullprop = &parse.FullToken.FullProperty; unsigned name = fullprop->Property.PropertyName; assert(name < Elements(info->properties)); info->properties[name] = fullprop->u[0].Data; } break; default: assert( 0 ); } } info->uses_kill = (info->opcode_count[TGSI_OPCODE_KILL_IF] || info->opcode_count[TGSI_OPCODE_KILL]); /* The dimensions of the IN decleration in geometry shader have * to be deduced from the type of the input primitive. */ if (procType == TGSI_PROCESSOR_GEOMETRY) { unsigned input_primitive = info->properties[TGSI_PROPERTY_GS_INPUT_PRIM]; int num_verts = u_vertices_per_prim(input_primitive); int j; info->file_count[TGSI_FILE_INPUT] = num_verts; info->file_max[TGSI_FILE_INPUT] = MAX2(info->file_max[TGSI_FILE_INPUT], num_verts - 1); for (j = 0; j < num_verts; ++j) { info->file_mask[TGSI_FILE_INPUT] |= (1 << j); } } tgsi_parse_free (&parse); } /** * Check if the given shader is a "passthrough" shader consisting of only * MOV instructions of the form: MOV OUT[n], IN[n] * */ boolean tgsi_is_passthrough_shader(const struct tgsi_token *tokens) { struct tgsi_parse_context parse; /** ** Setup to begin parsing input shader **/ if (tgsi_parse_init(&parse, tokens) != TGSI_PARSE_OK) { debug_printf("tgsi_parse_init() failed in tgsi_is_passthrough_shader()!\n"); return FALSE; } /** ** Loop over incoming program tokens/instructions */ while (!tgsi_parse_end_of_tokens(&parse)) { tgsi_parse_token(&parse); switch (parse.FullToken.Token.Type) { case TGSI_TOKEN_TYPE_INSTRUCTION: { struct tgsi_full_instruction *fullinst = &parse.FullToken.FullInstruction; const struct tgsi_full_src_register *src = &fullinst->Src[0]; const struct tgsi_full_dst_register *dst = &fullinst->Dst[0]; /* Do a whole bunch of checks for a simple move */ if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV || (src->Register.File != TGSI_FILE_INPUT && src->Register.File != TGSI_FILE_SYSTEM_VALUE) || dst->Register.File != TGSI_FILE_OUTPUT || src->Register.Index != dst->Register.Index || src->Register.Negate || src->Register.Absolute || src->Register.SwizzleX != TGSI_SWIZZLE_X || src->Register.SwizzleY != TGSI_SWIZZLE_Y || src->Register.SwizzleZ != TGSI_SWIZZLE_Z || src->Register.SwizzleW != TGSI_SWIZZLE_W || dst->Register.WriteMask != TGSI_WRITEMASK_XYZW) { tgsi_parse_free(&parse); return FALSE; } } break; case TGSI_TOKEN_TYPE_DECLARATION: /* fall-through */ case TGSI_TOKEN_TYPE_IMMEDIATE: /* fall-through */ case TGSI_TOKEN_TYPE_PROPERTY: /* fall-through */ default: ; /* no-op */ } } tgsi_parse_free(&parse); /* if we get here, it's a pass-through shader */ return TRUE; }