1 /*
2 * Copyright © 2009 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 /**
25 * \file prog_parameter_layout.c
26 * \brief Helper functions to layout storage for program parameters
27 *
28 * \author Ian Romanick <ian.d.romanick@intel.com>
29 */
30
31 #include "main/imports.h"
32 #include "main/mtypes.h"
33 #include "prog_parameter.h"
34 #include "prog_parameter_layout.h"
35 #include "prog_instruction.h"
36 #include "program_parser.h"
37
38 unsigned
_mesa_combine_swizzles(unsigned base,unsigned applied)39 _mesa_combine_swizzles(unsigned base, unsigned applied)
40 {
41 unsigned swiz = 0;
42 unsigned i;
43
44 for (i = 0; i < 4; i++) {
45 const unsigned s = GET_SWZ(applied, i);
46
47 swiz |= ((s <= SWIZZLE_W) ? GET_SWZ(base, s) : s) << (i * 3);
48 }
49
50 return swiz;
51 }
52
53
54 /**
55 * Copy indirect access array from one parameter list to another
56 *
57 * \param src Parameter array copied from
58 * \param dst Parameter array copied to
59 * \param first Index of first element in \c src to copy
60 * \param count Number of elements to copy
61 *
62 * \return
63 * The location in \c dst of the first element copied from \c src on
64 * success. -1 on failure.
65 *
66 * \warning
67 * This function assumes that there is already enough space available in
68 * \c dst to hold all of the elements that will be copied over.
69 */
70 static int
copy_indirect_accessed_array(struct gl_program_parameter_list * src,struct gl_program_parameter_list * dst,unsigned first,unsigned count)71 copy_indirect_accessed_array(struct gl_program_parameter_list *src,
72 struct gl_program_parameter_list *dst,
73 unsigned first, unsigned count)
74 {
75 const int base = dst->NumParameters;
76 unsigned i, j;
77
78 for (i = first; i < (first + count); i++) {
79 struct gl_program_parameter *curr = & src->Parameters[i];
80
81 if (curr->Type == PROGRAM_CONSTANT) {
82 j = dst->NumParameters;
83 } else {
84 for (j = 0; j < dst->NumParameters; j++) {
85 if (memcmp(dst->Parameters[j].StateIndexes, curr->StateIndexes,
86 sizeof(curr->StateIndexes)) == 0) {
87 return -1;
88 }
89 }
90 }
91
92 assert(j == dst->NumParameters);
93
94 /* copy src parameter [i] to dest parameter [j] */
95 memcpy(& dst->Parameters[j], curr,
96 sizeof(dst->Parameters[j]));
97 memcpy(dst->ParameterValues[j], src->ParameterValues[i],
98 sizeof(GLfloat) * 4);
99
100 /* Pointer to the string name was copied. Null-out src param name
101 * to prevent double free later.
102 */
103 curr->Name = NULL;
104
105 dst->NumParameters++;
106 }
107
108 return base;
109 }
110
111
112 /**
113 * XXX description???
114 * \return GL_TRUE for success, GL_FALSE for failure
115 */
116 GLboolean
_mesa_layout_parameters(struct asm_parser_state * state)117 _mesa_layout_parameters(struct asm_parser_state *state)
118 {
119 struct gl_program_parameter_list *layout;
120 struct asm_instruction *inst;
121 unsigned i;
122
123 layout =
124 _mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
125
126 /* PASS 1: Move any parameters that are accessed indirectly from the
127 * original parameter list to the new parameter list.
128 */
129 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
130 for (i = 0; i < 3; i++) {
131 if (inst->SrcReg[i].Base.RelAddr) {
132 /* Only attempt to add the to the new parameter list once.
133 */
134 if (!inst->SrcReg[i].Symbol->pass1_done) {
135 const int new_begin =
136 copy_indirect_accessed_array(state->prog->Parameters, layout,
137 inst->SrcReg[i].Symbol->param_binding_begin,
138 inst->SrcReg[i].Symbol->param_binding_length);
139
140 if (new_begin < 0) {
141 _mesa_free_parameter_list(layout);
142 return GL_FALSE;
143 }
144
145 inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
146 inst->SrcReg[i].Symbol->pass1_done = 1;
147 }
148
149 /* Previously the Index was just the offset from the parameter
150 * array. Now that the base of the parameter array is known, the
151 * index can be updated to its actual value.
152 */
153 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
154 inst->Base.SrcReg[i].Index +=
155 inst->SrcReg[i].Symbol->param_binding_begin;
156 }
157 }
158 }
159
160 /* PASS 2: Move any parameters that are not accessed indirectly from the
161 * original parameter list to the new parameter list.
162 */
163 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
164 for (i = 0; i < 3; i++) {
165 const struct gl_program_parameter *p;
166 const int idx = inst->SrcReg[i].Base.Index;
167 unsigned swizzle = SWIZZLE_NOOP;
168
169 /* All relative addressed operands were processed on the first
170 * pass. Just skip them here.
171 */
172 if (inst->SrcReg[i].Base.RelAddr) {
173 continue;
174 }
175
176 if ((inst->SrcReg[i].Base.File <= PROGRAM_OUTPUT)
177 || (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
178 continue;
179 }
180
181 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
182 p = & state->prog->Parameters->Parameters[idx];
183
184 switch (p->Type) {
185 case PROGRAM_CONSTANT: {
186 const gl_constant_value *const v =
187 state->prog->Parameters->ParameterValues[idx];
188
189 inst->Base.SrcReg[i].Index =
190 _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
191
192 inst->Base.SrcReg[i].Swizzle =
193 _mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
194 break;
195 }
196
197 case PROGRAM_STATE_VAR:
198 inst->Base.SrcReg[i].Index =
199 _mesa_add_state_reference(layout, p->StateIndexes);
200 break;
201
202 default:
203 break;
204 }
205
206 inst->SrcReg[i].Base.File = p->Type;
207 inst->Base.SrcReg[i].File = p->Type;
208 }
209 }
210
211 layout->StateFlags = state->prog->Parameters->StateFlags;
212 _mesa_free_parameter_list(state->prog->Parameters);
213 state->prog->Parameters = layout;
214
215 return GL_TRUE;
216 }
217