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;