| /* |
| * Copyright (C) 2008 Nicolai Haehnle. |
| * |
| * 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, sublicense, 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 NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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. |
| * |
| */ |
| |
| #include "radeon_program.h" |
| |
| #include "shader/prog_print.h" |
| |
| |
| /** |
| * Transform the given clause in the following way: |
| * 1. Replace it with an empty clause |
| * 2. For every instruction in the original clause, try the given |
| * transformations in order. |
| * 3. If one of the transformations returns GL_TRUE, assume that it |
| * has emitted the appropriate instruction(s) into the new clause; |
| * otherwise, copy the instruction verbatim. |
| * |
| * \note The transformation is currently not recursive; in other words, |
| * instructions emitted by transformations are not transformed. |
| * |
| * \note The transform is called 'local' because it can only look at |
| * one instruction at a time. |
| */ |
| void radeonLocalTransform( |
| GLcontext *Ctx, |
| struct gl_program *program, |
| int num_transformations, |
| struct radeon_program_transformation* transformations) |
| { |
| struct radeon_transform_context ctx; |
| int ip; |
| |
| ctx.Ctx = Ctx; |
| ctx.Program = program; |
| ctx.OldInstructions = program->Instructions; |
| ctx.OldNumInstructions = program->NumInstructions; |
| |
| program->Instructions = 0; |
| program->NumInstructions = 0; |
| |
| for(ip = 0; ip < ctx.OldNumInstructions; ++ip) { |
| struct prog_instruction *instr = ctx.OldInstructions + ip; |
| int i; |
| |
| for(i = 0; i < num_transformations; ++i) { |
| struct radeon_program_transformation* t = transformations + i; |
| |
| if (t->function(&ctx, instr, t->userData)) |
| break; |
| } |
| |
| if (i >= num_transformations) { |
| struct prog_instruction* dest = radeonAppendInstructions(program, 1); |
| _mesa_copy_instructions(dest, instr, 1); |
| } |
| } |
| |
| _mesa_free_instructions(ctx.OldInstructions, ctx.OldNumInstructions); |
| } |
| |
| |
| static void scan_instructions(GLboolean* used, const struct prog_instruction* insts, GLuint count) |
| { |
| GLuint i; |
| for (i = 0; i < count; i++) { |
| const struct prog_instruction *inst = insts + i; |
| const GLuint n = _mesa_num_inst_src_regs(inst->Opcode); |
| GLuint k; |
| |
| for (k = 0; k < n; k++) { |
| if (inst->SrcReg[k].File == PROGRAM_TEMPORARY) |
| used[inst->SrcReg[k].Index] = GL_TRUE; |
| } |
| } |
| } |
| |
| GLint radeonFindFreeTemporary(struct radeon_transform_context *t) |
| { |
| GLboolean used[MAX_PROGRAM_TEMPS]; |
| GLuint i; |
| |
| _mesa_memset(used, 0, sizeof(used)); |
| scan_instructions(used, t->Program->Instructions, t->Program->NumInstructions); |
| scan_instructions(used, t->OldInstructions, t->OldNumInstructions); |
| |
| for (i = 0; i < MAX_PROGRAM_TEMPS; i++) { |
| if (!used[i]) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| |
| /** |
| * Append the given number of instructions to the program and return a |
| * pointer to the first new instruction. |
| */ |
| struct prog_instruction *radeonAppendInstructions(struct gl_program *program, int count) |
| { |
| int oldnum = program->NumInstructions; |
| _mesa_insert_instructions(program, oldnum, count); |
| return program->Instructions + oldnum; |
| } |