builtin_function.cpp

   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
  24 #include <stdlib.h>
  25 #include "glsl_symbol_table.h"
  26 #include "glsl_parser_extras.h"
  27 #include "glsl_types.h"
  28 #include "ir.h"
  29
  30 static void
  31 generate_exp(exec_list *instructions,
  32              ir_variable **declarations,
  33              const glsl_type *type)
  34 {
  35    ir_dereference *const retval = new ir_dereference(declarations[16]);
  36    ir_dereference *const arg = new ir_dereference(declarations[0]);
  37    ir_rvalue *result;
  38
  39    result = new ir_expression(ir_unop_exp, type, arg, NULL);
  40
  41    ir_instruction *inst = new ir_assignment(retval, result, NULL);
  42    instructions->push_tail(inst);
  43 }
  44
  45 void
  46 generate_function_instance(ir_function *f,
  47                            const char *name,
  48                            exec_list *instructions,
  49                            void (*generate)(exec_list *instructions,
  50                                             ir_variable **declarations,
  51                                             const glsl_type *type),
  52                            const glsl_type *type)
  53 {
  54    ir_variable *declarations[17];
  55
  56    ir_function_signature *const sig = new ir_function_signature(type);
  57    f->signatures.push_tail(sig);
  58
  59    ir_label *const label = new ir_label(name);
  60    instructions->push_tail(label);
  61    sig->definition = label;
  62
  63    ir_variable *var = new ir_variable(type, "arg");
  64
  65    var->mode = ir_var_in;
  66    sig->parameters.push_tail(var);
  67
  68    var = new ir_variable(type, "arg");
  69
  70    declarations[0] = var;
  71
  72    ir_variable *retval = new ir_variable(type, "__retval");
  73    instructions->push_tail(retval);
  74
  75    declarations[16] = retval;
  76
  77    generate(instructions, declarations, type);
  78 }
  79
  80 void
  81 make_gentype_function(glsl_symbol_table *symtab, exec_list *instructions,
  82                       const char *name,
  83                       void (*generate)(exec_list *instructions,
  84                                        ir_variable **declarations,
  85                                        const glsl_type *type))
  86 {
  87    ir_function *const f = new ir_function(name);
  88    const glsl_type *vec2_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 2, 1);
  89    const glsl_type *vec3_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 3, 1);
  90    const glsl_type *vec4_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 4, 1);
  91
  92    bool added = symtab->add_function(name, f);
  93    assert(added);
  94
  95    generate_function_instance(f, name, instructions, generate, glsl_type::float_type);
  96    generate_function_instance(f, name, instructions, generate, vec2_type);
  97    generate_function_instance(f, name, instructions, generate, vec3_type);
  98    generate_function_instance(f, name, instructions, generate, vec4_type);
  99 }
 100
 101 void
 102 generate_110_functions(glsl_symbol_table *symtab, exec_list *instructions)
 103 {
 104    /* FINISHME: radians() */
 105    /* FINISHME: degrees() */
 106    /* FINISHME: sin() */
 107    /* FINISHME: cos() */
 108    /* FINISHME: tan() */
 109    /* FINISHME: asin() */
 110    /* FINISHME: acos() */
 111    /* FINISHME: atan(y,x) */
 112    /* FINISHME: atan(y/x) */
 113    /* FINISHME: pow() */
 114    make_gentype_function(symtab, instructions, "exp", generate_exp);
 115    /* FINISHME: log() */
 116    /* FINISHME: exp2() */
 117    /* FINISHME: log2() */
 118    /* FINISHME: sqrt() */
 119    /* FINISHME: inversesqrt() */
 120    /* FINISHME: abs() */
 121    /* FINISHME: sign() */
 122    /* FINISHME: floor() */
 123    /* FINISHME: ceil() */
 124    /* FINISHME: fract() */
 125    /* FINISHME: mod(x, float y) */
 126    /* FINISHME: mod(x, y) */
 127    /* FINISHME: min() */
 128    /* FINISHME: max() */
 129    /* FINISHME: clamp() */
 130    /* FINISHME: clamp() */
 131    /* FINISHME: mix() */
 132    /* FINISHME: mix() */
 133    /* FINISHME: step() */
 134    /* FINISHME: step() */
 135    /* FINISHME: smoothstep() */
 136    /* FINISHME: smoothstep() */
 137    /* FINISHME: floor() */
 138    /* FINISHME: step() */
 139    /* FINISHME: length() */
 140    /* FINISHME: distance() */
 141    /* FINISHME: dot() */
 142    /* FINISHME: cross() */
 143    /* FINISHME: normalize() */
 144    /* FINISHME: ftransform() */
 145    /* FINISHME: faceforward() */
 146    /* FINISHME: reflect() */
 147    /* FINISHME: refract() */
 148    /* FINISHME: matrixCompMult() */
 149    /* FINISHME: lessThan() */
 150    /* FINISHME: lessThanEqual() */
 151    /* FINISHME: greaterThan() */
 152    /* FINISHME: greaterThanEqual() */
 153    /* FINISHME: equal() */
 154    /* FINISHME: notEqual() */
 155    /* FINISHME: any() */
 156    /* FINISHME: all() */
 157    /* FINISHME: not() */
 158    /* FINISHME: texture*() */
 159    /* FINISHME: shadow*() */
 160    /* FINISHME: dFd[xy]() */
 161    /* FINISHME: fwidth() */
 162 }
 163
 164 void
 165 _mesa_glsl_initialize_functions(exec_list *instructions,
 166                                 struct _mesa_glsl_parse_state *state)
 167 {
 168    generate_110_functions(state->symbols, instructions);
 169 }