2 * Copyright (C) 2008 Nicolai Haehnle.
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 #include "radeon_program.h"
32 #include "radeon_compiler.h"
33 #include "radeon_dataflow.h"
37 * Transform the given clause in the following way:
38 * 1. Replace it with an empty clause
39 * 2. For every instruction in the original clause, try the given
40 * transformations in order.
41 * 3. If one of the transformations returns GL_TRUE, assume that it
42 * has emitted the appropriate instruction(s) into the new clause;
43 * otherwise, copy the instruction verbatim.
45 * \note The transformation is currently not recursive; in other words,
46 * instructions emitted by transformations are not transformed.
48 * \note The transform is called 'local' because it can only look at
49 * one instruction at a time.
51 void rc_local_transform(
52 struct radeon_compiler * c,
55 struct radeon_program_transformation *transformations =
56 (struct radeon_program_transformation*)user;
57 struct rc_instruction * inst = c->Program.Instructions.Next;
59 while(inst != &c->Program.Instructions) {
60 struct rc_instruction * current = inst;
65 for(i = 0; transformations[i].function; ++i) {
66 struct radeon_program_transformation* t = transformations + i;
68 if (t->function(c, current, t->userData))
74 struct get_used_temporaries_data {
76 unsigned int UsedLength;
79 static void get_used_temporaries_cb(
81 struct rc_instruction * inst,
82 rc_register_file file,
86 struct get_used_temporaries_data * d = userdata;
88 if (file != RC_FILE_TEMPORARY)
91 if (index >= d->UsedLength)
94 d->Used[index] |= mask;
98 * This function fills in the parameter 'used' with a writemask that
99 * represent which components of each temporary register are used by the
100 * program. This is meant to be combined with rc_find_free_temporary_list as a
101 * more efficient version of rc_find_free_temporary.
102 * @param used The function does not initialize this parameter.
104 void rc_get_used_temporaries(
105 struct radeon_compiler * c,
106 unsigned char * used,
107 unsigned int used_length)
109 struct rc_instruction * inst;
110 struct get_used_temporaries_data d;
112 d.UsedLength = used_length;
114 for(inst = c->Program.Instructions.Next;
115 inst != &c->Program.Instructions; inst = inst->Next) {
117 rc_for_all_reads_mask(inst, get_used_temporaries_cb, &d);
118 rc_for_all_writes_mask(inst, get_used_temporaries_cb, &d);
122 /* Search a list of used temporaries for a free one
123 * \sa rc_get_used_temporaries
124 * @note If this functions finds a free temporary, it will mark it as used
125 * in the used temporary list (param 'used')
126 * @param used list of used temporaries
127 * @param used_length number of items in param 'used'
128 * @param mask which components must be free in the temporary index that is
130 * @return -1 If there are no more free temporaries, otherwise the index of
131 * a temporary register where the components specified in param 'mask' are
134 int rc_find_free_temporary_list(
135 struct radeon_compiler * c,
136 unsigned char * used,
137 unsigned int used_length,
141 for(i = 0; i < used_length; i++) {
142 if ((~used[i] & mask) == mask) {
150 unsigned int rc_find_free_temporary(struct radeon_compiler * c)
152 unsigned char used[RC_REGISTER_MAX_INDEX];
155 memset(used, 0, sizeof(used));
157 rc_get_used_temporaries(c, used, RC_REGISTER_MAX_INDEX);
159 free = rc_find_free_temporary_list(c, used, RC_REGISTER_MAX_INDEX,
162 rc_error(c, "Ran out of temporary registers\n");
169 struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c)
171 struct rc_instruction * inst = memory_pool_malloc(&c->Pool, sizeof(struct rc_instruction));
173 memset(inst, 0, sizeof(struct rc_instruction));
175 inst->U.I.Opcode = RC_OPCODE_ILLEGAL_OPCODE;
176 inst->U.I.DstReg.WriteMask = RC_MASK_XYZW;
177 inst->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_XYZW;
178 inst->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_XYZW;
179 inst->U.I.SrcReg[2].Swizzle = RC_SWIZZLE_XYZW;
184 void rc_insert_instruction(struct rc_instruction * after, struct rc_instruction * inst)
187 inst->Next = after->Next;
189 inst->Prev->Next = inst;
190 inst->Next->Prev = inst;
193 struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after)
195 struct rc_instruction * inst = rc_alloc_instruction(c);
197 rc_insert_instruction(after, inst);
202 void rc_remove_instruction(struct rc_instruction * inst)
204 inst->Prev->Next = inst->Next;
205 inst->Next->Prev = inst->Prev;
209 * Return the number of instructions in the program.
211 unsigned int rc_recompute_ips(struct radeon_compiler * c)
214 struct rc_instruction * inst;
216 for(inst = c->Program.Instructions.Next;
217 inst != &c->Program.Instructions;
222 c->Program.Instructions.IP = 0xcafedead;