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_unop(exec_list *instructions,
  32               ir_variable **declarations,
  33               const glsl_type *type,
  34               enum ir_expression_operation op)
  35 {
  36    ir_dereference *const retval = new ir_dereference(declarations[16]);
  37    ir_dereference *const arg = new ir_dereference(declarations[0]);
  38    ir_rvalue *result;
  39
  40    result = new ir_expression(op, type, arg, NULL);
  41
  42    ir_instruction *inst = new ir_assignment(retval, result, NULL);
  43    instructions->push_tail(inst);
  44 }
  45
  46 static void
  47 generate_exp(exec_list *instructions,
  48              ir_variable **declarations,
  49              const glsl_type *type)
  50 {
  51    generate_unop(instructions, declarations, type, ir_unop_exp);
  52 }
  53
  54 static void
  55 generate_log(exec_list *instructions,
  56              ir_variable **declarations,
  57              const glsl_type *type)
  58 {
  59    generate_unop(instructions, declarations, type, ir_unop_log);
  60 }
  61
  62 static void
  63 generate_rsq(exec_list *instructions,
  64                ir_variable **declarations,
  65                const glsl_type *type)
  66 {
  67    generate_unop(instructions, declarations, type, ir_unop_rsq);
  68 }
  69
  70 static void
  71 generate_abs(exec_list *instructions,
  72              ir_variable **declarations,
  73              const glsl_type *type)
  74 {
  75    generate_unop(instructions, declarations, type, ir_unop_abs);
  76 }
  77
  78 static void
  79 generate_ceil(exec_list *instructions,
  80               ir_variable **declarations,
  81               const glsl_type *type)
  82 {
  83    generate_unop(instructions, declarations, type, ir_unop_ceil);
  84 }
  85
  86 static void
  87 generate_floor(exec_list *instructions,
  88                ir_variable **declarations,
  89                const glsl_type *type)
  90 {
  91    generate_unop(instructions, declarations, type, ir_unop_floor);
  92 }
  93
  94 void
  95 generate_function_instance(ir_function *f,
  96                            const char *name,
  97                            exec_list *instructions,
  98                            void (*generate)(exec_list *instructions,
  99                                             ir_variable **declarations,
 100                                             const glsl_type *type),
 101                            const glsl_type *type)
 102 {
 103    ir_variable *declarations[17];
 104
 105    ir_function_signature *const sig = new ir_function_signature(type);
 106    f->signatures.push_tail(sig);
 107
 108    ir_label *const label = new ir_label(name);
 109    instructions->push_tail(label);
 110    sig->definition = label;
 111
 112    ir_variable *var = new ir_variable(type, "arg");
 113
 114    var->mode = ir_var_in;
 115    sig->parameters.push_tail(var);
 116
 117    var = new ir_variable(type, "arg");
 118
 119    declarations[0] = var;
 120
 121    ir_variable *retval = new ir_variable(type, "__retval");
 122    instructions->push_tail(retval);
 123
 124    declarations[16] = retval;
 125
 126    generate(instructions, declarations, type);
 127 }
 128
 129 void
 130 make_gentype_function(glsl_symbol_table *symtab, exec_list *instructions,
 131                       const char *name,
 132                       void (*generate)(exec_list *instructions,
 133                                        ir_variable **declarations,
 134                                        const glsl_type *type))
 135 {
 136    ir_function *const f = new ir_function(name);
 137    const glsl_type *vec2_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 2, 1);
 138    const glsl_type *vec3_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 3, 1);
 139    const glsl_type *vec4_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 4, 1);
 140
 141    bool added = symtab->add_function(name, f);
 142    assert(added);
 143
 144    generate_function_instance(f, name, instructions, generate, glsl_type::float_type);
 145    generate_function_instance(f, name, instructions, generate, vec2_type);
 146    generate_function_instance(f, name, instructions, generate, vec3_type);
 147    generate_function_instance(f, name, instructions, generate, vec4_type);
 148 }
 149
 150 void
 151 generate_110_functions(glsl_symbol_table *symtab, exec_list *instructions)
 152 {
 153    /* FINISHME: radians() */
 154    /* FINISHME: degrees() */
 155    /* FINISHME: sin() */
 156    /* FINISHME: cos() */
 157    /* FINISHME: tan() */
 158    /* FINISHME: asin() */
 159    /* FINISHME: acos() */
 160    /* FINISHME: atan(y,x) */
 161    /* FINISHME: atan(y/x) */
 162    /* FINISHME: pow() */
 163    make_gentype_function(symtab, instructions, "exp", generate_exp);
 164    make_gentype_function(symtab, instructions, "log", generate_log);
 165    /* FINISHME: exp2() */
 166    /* FINISHME: log2() */
 167    /* FINISHME: sqrt() */
 168    make_gentype_function(symtab, instructions, "inversesqrt", generate_rsq);
 169    make_gentype_function(symtab, instructions, "abs", generate_abs);
 170    /* FINISHME: sign() */
 171    make_gentype_function(symtab, instructions, "floor", generate_floor);
 172    make_gentype_function(symtab, instructions, "ceil", generate_ceil);
 173    /* FINISHME: fract() */
 174    /* FINISHME: mod(x, float y) */
 175    /* FINISHME: mod(x, y) */
 176    /* FINISHME: min() */
 177    /* FINISHME: max() */
 178    /* FINISHME: clamp() */
 179    /* FINISHME: clamp() */
 180    /* FINISHME: mix() */
 181    /* FINISHME: mix() */
 182    /* FINISHME: step() */
 183    /* FINISHME: step() */
 184    /* FINISHME: smoothstep() */
 185    /* FINISHME: smoothstep() */
 186    /* FINISHME: floor() */
 187    /* FINISHME: step() */
 188    /* FINISHME: length() */
 189    /* FINISHME: distance() */
 190    /* FINISHME: dot() */
 191    /* FINISHME: cross() */
 192    /* FINISHME: normalize() */
 193    /* FINISHME: ftransform() */
 194    /* FINISHME: faceforward() */
 195    /* FINISHME: reflect() */
 196    /* FINISHME: refract() */
 197    /* FINISHME: matrixCompMult() */
 198    /* FINISHME: lessThan() */
 199    /* FINISHME: lessThanEqual() */
 200    /* FINISHME: greaterThan() */
 201    /* FINISHME: greaterThanEqual() */
 202    /* FINISHME: equal() */
 203    /* FINISHME: notEqual() */
 204    /* FINISHME: any() */
 205    /* FINISHME: all() */
 206    /* FINISHME: not() */
 207    /* FINISHME: texture*() */
 208    /* FINISHME: shadow*() */
 209    /* FINISHME: dFd[xy]() */
 210    /* FINISHME: fwidth() */
 211 }
 212
 213 void
 214 _mesa_glsl_initialize_functions(exec_list *instructions,
 215                                 struct _mesa_glsl_parse_state *state)
 216 {
 217    generate_110_functions(state->symbols, instructions);
 218 }