src/mesa/drivers/dri/r300/compiler/radeon_program.c

   1 /*
   2  * Copyright (C) 2008 Nicolai Haehnle.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "radeon_program.h"
  29
  30 #include "radeon_compiler.h"
  31 #include "shader/prog_parameter.h"
  32 #include "shader/prog_print.h"
  33
  34
  35 /**
  36  * Transform the given clause in the following way:
  37  *  1. Replace it with an empty clause
  38  *  2. For every instruction in the original clause, try the given
  39  *     transformations in order.
  40  *  3. If one of the transformations returns GL_TRUE, assume that it
  41  *     has emitted the appropriate instruction(s) into the new clause;
  42  *     otherwise, copy the instruction verbatim.
  43  *
  44  * \note The transformation is currently not recursive; in other words,
  45  * instructions emitted by transformations are not transformed.
  46  *
  47  * \note The transform is called 'local' because it can only look at
  48  * one instruction at a time.
  49  */
  50 void radeonLocalTransform(
  51         struct radeon_compiler * c,
  52         int num_transformations,
  53         struct radeon_program_transformation* transformations)
  54 {
  55         struct rc_instruction * inst = c->Program.Instructions.Next;
  56
  57         while(inst != &c->Program.Instructions) {
  58                 struct rc_instruction * current = inst;
  59                 int i;
  60
  61                 inst = inst->Next;
  62
  63                 for(i = 0; i < num_transformations; ++i) {
  64                         struct radeon_program_transformation* t = transformations + i;
  65
  66                         if (t->function(c, current, t->userData))
  67                                 break;
  68                 }
  69         }
  70 }
  71
  72
  73 GLint rc_find_free_temporary(struct radeon_compiler * c)
  74 {
  75         GLboolean used[MAX_PROGRAM_TEMPS];
  76         GLuint i;
  77
  78         memset(used, 0, sizeof(used));
  79
  80         for (struct rc_instruction * rcinst = c->Program.Instructions.Next; rcinst != &c->Program.Instructions; rcinst = rcinst->Next) {
  81                 const struct prog_instruction *inst = &rcinst->I;
  82                 const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
  83                 GLuint k;
  84
  85                 for (k = 0; k < n; k++) {
  86                         if (inst->SrcReg[k].File == PROGRAM_TEMPORARY)
  87                                 used[inst->SrcReg[k].Index] = GL_TRUE;
  88                 }
  89         }
  90
  91         for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
  92                 if (!used[i])
  93                         return i;
  94         }
  95
  96         return -1;
  97 }
  98
  99
 100 struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c)
 101 {
 102         struct rc_instruction * inst = memory_pool_malloc(&c->Pool, sizeof(struct rc_instruction));
 103
 104         inst->Prev = 0;
 105         inst->Next = 0;
 106
 107         _mesa_init_instructions(&inst->I, 1);
 108
 109         return inst;
 110 }
 111
 112
 113 struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after)
 114 {
 115         struct rc_instruction * inst = rc_alloc_instruction(c);
 116
 117         inst->Prev = after;
 118         inst->Next = after->Next;
 119
 120         inst->Prev->Next = inst;
 121         inst->Next->Prev = inst;
 122
 123         return inst;
 124 }
 125
 126 void rc_remove_instruction(struct rc_instruction * inst)
 127 {
 128         inst->Prev->Next = inst->Next;
 129         inst->Next->Prev = inst->Prev;
 130 }
 131
 132
 133 void rc_mesa_to_rc_program(struct radeon_compiler * c, struct gl_program * program)
 134 {
 135         struct prog_instruction *source;
 136         unsigned int i;
 137
 138         for(source = program->Instructions; source->Opcode != OPCODE_END; ++source) {
 139                 struct rc_instruction * dest = rc_insert_new_instruction(c, c->Program.Instructions.Prev);
 140                 dest->I = *source;
 141         }
 142
 143         c->Program.ShadowSamplers = program->ShadowSamplers;
 144         c->Program.InputsRead = program->InputsRead;
 145         c->Program.OutputsWritten = program->OutputsWritten;
 146
 147         for(i = 0; i < program->Parameters->NumParameters; ++i) {
 148                 struct rc_constant constant;
 149
 150                 constant.Type = RC_CONSTANT_EXTERNAL;
 151                 constant.Size = 4;
 152                 constant.u.External = i;
 153
 154                 rc_constants_add(&c->Program.Constants, &constant);
 155         }
 156 }
 157
 158
 159 /**
 160  * Print program to stderr, default options.
 161  */
 162 void rc_print_program(const struct rc_program *prog)
 163 {
 164         GLuint indent = 0;
 165         GLuint linenum = 1;
 166         struct rc_instruction *inst;
 167
 168         fprintf(stderr, "# Radeon Compiler Program\n");
 169
 170         for(inst = prog->Instructions.Next; inst != &prog->Instructions; inst = inst->Next) {
 171                 fprintf(stderr, "%3d: ", linenum);
 172
 173                 /* Massive hack: We rely on the fact that the printers do not actually
 174                  * use the gl_program argument (last argument) in debug mode */
 175                 indent = _mesa_fprint_instruction_opt(
 176                                 stderr, &inst->I,
 177                                 indent, PROG_PRINT_DEBUG, 0);
 178
 179                 linenum++;
 180         }
 181 }