1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 2005-2006 Brian Paul 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 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
* BRIAN PAUL 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.
*/
/**
* \file slang_compile_function.c
* slang front-end compiler
* \author Michal Krol
*/
#include "imports.h"
#include "slang_compile.h"
/* slang_fixup_table */
void
slang_fixup_table_init(slang_fixup_table * fix)
{
fix->table = NULL;
fix->count = 0;
}
void
slang_fixup_table_free(slang_fixup_table * fix)
{
slang_alloc_free(fix->table);
slang_fixup_table_init(fix);
}
/**
* Add a new fixup address to the table.
*/
GLboolean
slang_fixup_save(slang_fixup_table *fixups, GLuint address)
{
fixups->table = (GLuint *)
slang_alloc_realloc(fixups->table,
fixups->count * sizeof(GLuint),
(fixups->count + 1) * sizeof(GLuint));
if (fixups->table == NULL)
return GL_FALSE;
fixups->table[fixups->count] = address;
fixups->count++;
return GL_TRUE;
}
/* slang_function */
int
slang_function_construct(slang_function * func)
{
func->kind = slang_func_ordinary;
if (!slang_variable_construct(&func->header))
return 0;
func->parameters = (slang_variable_scope *)
slang_alloc_malloc(sizeof(slang_variable_scope));
if (func->parameters == NULL) {
slang_variable_destruct(&func->header);
return 0;
}
_slang_variable_scope_ctr(func->parameters);
func->param_count = 0;
func->body = NULL;
func->address = ~0;
slang_fixup_table_init(&func->fixups);
return 1;
}
void
slang_function_destruct(slang_function * func)
{
slang_variable_destruct(&func->header);
slang_variable_scope_destruct(func->parameters);
slang_alloc_free(func->parameters);
if (func->body != NULL) {
slang_operation_destruct(func->body);
slang_alloc_free(func->body);
}
slang_fixup_table_free(&func->fixups);
}
/*
* slang_function_scope
*/
GLvoid
_slang_function_scope_ctr(slang_function_scope * self)
{
self->functions = NULL;
self->num_functions = 0;
self->outer_scope = NULL;
}
void
slang_function_scope_destruct(slang_function_scope * scope)
{
unsigned int i;
for (i = 0; i < scope->num_functions; i++)
slang_function_destruct(scope->functions + i);
slang_alloc_free(scope->functions);
}
/**
* Search a list of functions for a particular function by name.
* \param funcs the list of functions to search
* \param a_name the name to search for
* \param all_scopes if non-zero, search containing scopes too.
* \return pointer to found function, or NULL.
*/
int
slang_function_scope_find_by_name(slang_function_scope * funcs,
slang_atom a_name, int all_scopes)
{
unsigned int i;
for (i = 0; i < funcs->num_functions; i++)
if (a_name == funcs->functions[i].header.a_name)
return 1;
if (all_scopes && funcs->outer_scope != NULL)
return slang_function_scope_find_by_name(funcs->outer_scope, a_name, 1);
return 0;
}
/**
* Search a list of functions for a particular function (for implementing
* function calls. Matching is done by first comparing the function's name,
* then the function's parameter list.
*
* \param funcs the list of functions to search
* \param fun the function to search for
* \param all_scopes if non-zero, search containing scopes too.
* \return pointer to found function, or NULL.
*/
slang_function *
slang_function_scope_find(slang_function_scope * funcs, slang_function * fun,
int all_scopes)
{
unsigned int i;
for (i = 0; i < funcs->num_functions; i++) {
slang_function *f = &funcs->functions[i];
unsigned int j;
if (fun->header.a_name != f->header.a_name)
continue;
if (fun->param_count != f->param_count)
continue;
for (j = 0; j < fun->param_count; j++) {
if (!slang_type_specifier_equal
(&fun->parameters->variables[j].type.specifier,
&f->parameters->variables[j].type.specifier))
break;
}
if (j == fun->param_count)
return f;
}
if (all_scopes && funcs->outer_scope != NULL)
return slang_function_scope_find(funcs->outer_scope, fun, 1);
return NULL;
}
/*
* _slang_build_export_code_table()
*/
GLboolean
_slang_build_export_code_table(slang_export_code_table * tbl,
slang_function_scope * funs,
slang_code_unit * unit)
{
slang_atom mainAtom;
GLuint i;
mainAtom = slang_atom_pool_atom(tbl->atoms, "main");
if (mainAtom == SLANG_ATOM_NULL)
return GL_FALSE;
for (i = 0; i < funs->num_functions; i++) {
if (funs->functions[i].header.a_name == mainAtom) {
slang_function *fun = &funs->functions[i];
slang_export_code_entry *e;
slang_assemble_ctx A;
e = slang_export_code_table_add(tbl);
if (e == NULL)
return GL_FALSE;
e->address = unit->object->assembly.count;
e->name = slang_atom_pool_atom(tbl->atoms, "@main");
if (e->name == SLANG_ATOM_NULL)
return GL_FALSE;
A.file = &unit->object->assembly;
A.mach = &unit->object->machine;
A.atoms = &unit->object->atompool;
A.space.funcs = &unit->funs;
A.space.structs = &unit->structs;
A.space.vars = &unit->vars;
slang_assembly_file_push_label(&unit->object->assembly,
slang_asm_local_alloc, 20);
slang_assembly_file_push_label(&unit->object->assembly,
slang_asm_enter, 20);
_slang_assemble_function_call(&A, fun, NULL, 0, GL_FALSE);
slang_assembly_file_push(&unit->object->assembly, slang_asm_exit);
}
}
return GL_TRUE;
}
|
