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
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
98 dst->ParameterValueOffset[j] = dst->NumParameterValues;
99
100 gl_constant_value *pv_dst =
101 dst->ParameterValues + dst->ParameterValueOffset[j];
102 gl_constant_value *pv_src =
103 src->ParameterValues + src->ParameterValueOffset[i];
104
105 memcpy(pv_dst, pv_src, MIN2(src->Parameters[i].Size, 4) *
106 sizeof(GLfloat));
107 dst->NumParameterValues += MIN2(dst->Parameters[j].Size, 4);
108
109
110 /* Pointer to the string name was copied. Null-out src param name
111 * to prevent double free later.
112 */
113 curr->Name = NULL;
114
115 dst->NumParameters++;
116 }
117
118 return base;
119 }
120
121
122 /**
123 * XXX description???
124 * \return GL_TRUE for success, GL_FALSE for failure
125 */
126 GLboolean
_mesa_layout_parameters(struct asm_parser_state * state)127 _mesa_layout_parameters(struct asm_parser_state *state)
128 {
129 struct gl_program_parameter_list *layout;
130 struct asm_instruction *inst;
131 unsigned i;
132
133 layout =
134 _mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
135
136 /* PASS 1: Move any parameters that are accessed indirectly from the
137 * original parameter list to the new parameter list.
138 */
139 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
140 for (i = 0; i < 3; i++) {
141 if (inst->SrcReg[i].Base.RelAddr) {
142 /* Only attempt to add the to the new parameter list once.
143 */
144 if (!inst->SrcReg[i].Symbol->pass1_done) {
145 const int new_begin =
146 copy_indirect_accessed_array(state->prog->Parameters, layout,
147 inst->SrcReg[i].Symbol->param_binding_begin,
148 inst->SrcReg[i].Symbol->param_binding_length);
149
150 if (new_begin < 0) {
151 _mesa_free_parameter_list(layout);
152 return GL_FALSE;
153 }
154
155 inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
156 inst->SrcReg[i].Symbol->pass1_done = 1;
157 }
158
159 /* Previously the Index was just the offset from the parameter
160 * array. Now that the base of the parameter array is known, the
161 * index can be updated to its actual value.
162 */
163 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
164 inst->Base.SrcReg[i].Index +=
165 inst->SrcReg[i].Symbol->param_binding_begin;
166 }
167 }
168 }
169
170 /* PASS 2: Move any parameters that are not accessed indirectly from the
171 * original parameter list to the new parameter list.
172 */
173 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
174 for (i = 0; i < 3; i++) {
175 const struct gl_program_parameter *p;
176 const int idx = inst->SrcReg[i].Base.Index;
177 unsigned swizzle = SWIZZLE_NOOP;
178
179 /* All relative addressed operands were processed on the first
180 * pass. Just skip them here.
181 */
182 if (inst->SrcReg[i].Base.RelAddr) {
183 continue;
184 }
185
186 if ((inst->SrcReg[i].Base.File <= PROGRAM_OUTPUT)
187 || (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
188 continue;
189 }
190
191 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
192 p = & state->prog->Parameters->Parameters[idx];
193
194 switch (p->Type) {
195 case PROGRAM_CONSTANT: {
196 unsigned pvo = state->prog->Parameters->ParameterValueOffset[idx];
197 const gl_constant_value *const v =
198 state->prog->Parameters->ParameterValues + pvo;
199
200 inst->Base.SrcReg[i].Index =
201 _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
202
203 inst->Base.SrcReg[i].Swizzle =
204 _mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
205 break;
206 }
207
208 case PROGRAM_STATE_VAR:
209 inst->Base.SrcReg[i].Index =
210 _mesa_add_state_reference(layout, p->StateIndexes);
211 break;
212
213 default:
214 break;
215 }
216
217 inst->SrcReg[i].Base.File = p->Type;
218 inst->Base.SrcReg[i].File = p->Type;
219 }
220 }
221
222 layout->StateFlags = state->prog->Parameters->StateFlags;
223 _mesa_free_parameter_list(state->prog->Parameters);
224 state->prog->Parameters = layout;
225
226 return GL_TRUE;
227 }
228