ir.cc

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <string.h>
  24 #include "main/imports.h"
  25 #include "main/simple_list.h"
  26 #include "ir.h"
  27 #include "glsl_types.h"
  28
  29 ir_instruction::ir_instruction(int mode)
  30 {
  31    this->mode = mode;
  32    make_empty_list(this);
  33 }
  34
  35
  36 ir_assignment::ir_assignment(ir_instruction *lhs, ir_instruction *rhs,
  37                              ir_expression *condition)
  38    : ir_instruction(ir_op_assign)
  39 {
  40    this->lhs = (ir_dereference *) lhs;
  41    this->rhs = rhs;
  42    this->condition = condition;
  43 }
  44
  45
  46 ir_expression::ir_expression(int op, const struct glsl_type *type,
  47                              ir_instruction *op0, ir_instruction *op1)
  48    : ir_instruction(ir_op_expression)
  49 {
  50    this->type = type;
  51    this->operation = ir_expression_operation(op);
  52    this->operands[0] = op0;
  53    this->operands[1] = op1;
  54 }
  55
  56
  57 ir_label::ir_label(const char *label)
  58    : ir_instruction(ir_op_label), label(label)
  59 {
  60    /* empty */
  61 }
  62
  63
  64 ir_constant::ir_constant(const struct glsl_type *type, const void *data)
  65    : ir_instruction(ir_op_constant)
  66 {
  67    const unsigned elements =
  68       ((type->vector_elements == 0) ? 1 : type->vector_elements)
  69       * ((type->matrix_rows == 0) ? 1 : type->matrix_rows);
  70    unsigned size = 0;
  71
  72    this->type = type;
  73    switch (type->base_type) {
  74    case GLSL_TYPE_UINT:  size = sizeof(this->value.u[0]); break;
  75    case GLSL_TYPE_INT:   size = sizeof(this->value.i[0]); break;
  76    case GLSL_TYPE_FLOAT: size = sizeof(this->value.f[0]); break;
  77    case GLSL_TYPE_BOOL:  size = sizeof(this->value.b[0]); break;
  78    default:
  79       /* FINISHME: What to do?  Exceptions are not the answer.
  80        */
  81       break;
  82    }
  83
  84    memcpy(& this->value, data, size * elements);
  85 }
  86
  87
  88 ir_dereference::ir_dereference(ir_instruction *var)
  89    : ir_instruction(ir_op_dereference)
  90 {
  91    this->mode = ir_reference_variable;
  92    this->var = var;
  93    this->type = (var != NULL) ? var->type : glsl_error_type;
  94 }
  95
  96
  97 ir_variable::ir_variable(const struct glsl_type *type, const char *name)
  98    : ir_instruction(ir_op_var_decl)
  99 {
 100    this->type = type;
 101    this->name = name;
 102 }
 103
 104
 105 ir_function_signature::ir_function_signature(void)
 106    : ir_instruction(ir_op_func_sig)
 107 {
 108    make_empty_list(& parameters);
 109 }
 110
 111
 112 ir_function::ir_function(void)
 113    : ir_instruction(ir_op_func)
 114 {
 115    make_empty_list(& signatures);
 116 }