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cairo-drm-intel-brw-eu.c
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1 /*
2  Copyright (C) Intel Corp. 2006. All Rights Reserved.
3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4  develop this 3D driver.
5 
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:
13 
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.
17 
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.
25 
26  **********************************************************************/
27 /*
28  * Authors:
29  * Keith Whitwell <keith@tungstengraphics.com>
30  */
31 
32 #include "cairoint.h"
33 #include "cairo-drm-intel-brw-eu.h"
34 
35 #include <assert.h>
36 #include <stdlib.h>
37 #include <string.h>
38 
39 
40 /* How does predicate control work when execution_size != 8? Do I
41  * need to test/set for 0xffff when execution_size is 16?
42  */
44 {
45  p->current->header.predicate_control = BRW_PREDICATE_NONE;
46 
47  if (value != 0xff) {
48  if (value != p->flag_value) {
51  p->flag_value = value;
53  }
54 
55  p->current->header.predicate_control = BRW_PREDICATE_NORMAL;
56  }
57 }
58 
60 {
61  p->current->header.predicate_control = pc;
62 }
63 
65 {
66  p->current->header.destreg__conditonalmod = conditional;
67 }
68 
69 void brw_set_access_mode( struct brw_compile *p, uint32_t access_mode )
70 {
71  p->current->header.access_mode = access_mode;
72 }
73 
74 void brw_set_compression_control( struct brw_compile *p, int compression_control )
75 {
76  p->current->header.compression_control = compression_control;
77 }
78 
80 {
81  p->current->header.mask_control = value;
82 }
83 
85 {
86  p->current->header.saturate = value;
87 }
88 
90 {
91  assert(p->current != &p->stack[BRW_EU_MAX_INSN_STACK-1]);
92  memcpy(p->current+1, p->current, sizeof(struct brw_instruction));
93  p->current++;
94 }
95 
97 {
98  assert(p->current != p->stack);
99  p->current--;
100 }
101 
102 /************************************************************************/
103 void
105  cairo_bool_t is_g4x)
106 {
107  p->nr_insn = 0;
108  p->current = p->stack;
109  memset (p->current, 0, sizeof (p->current[0]));
110 
111  p->is_g4x = is_g4x;
112 
113  /* Some defaults? */
114  brw_set_mask_control (p, BRW_MASK_ENABLE); /* what does this do? */
115  brw_set_saturate (p, 0);
118 }
119 
120 const uint32_t *
122  uint32_t *sz)
123 {
124  *sz = p->nr_insn * sizeof (struct brw_instruction);
125  return (const uint32_t *)p->store;
126 }
127 
128 
129 
130 /*
131  * Subroutine calls require special attention.
132  * Mesa instructions may be expanded into multiple hardware instructions
133  * so the prog_instruction::BranchTarget field can't be used as an index
134  * into the hardware instructions.
135  *
136  * The BranchTarget field isn't needed, however. Mesa's GLSL compiler
137  * emits CAL and BGNSUB instructions with labels that can be used to map
138  * subroutine calls to actual subroutine code blocks.
139  *
140  * The structures and function here implement patching of CAL instructions
141  * so they jump to the right subroutine code...
142  */
143 
144 
145 /*
146  * For each OPCODE_BGNSUB we create one of these.
147  */
148 struct brw_glsl_label
149 {
150  const char *name; /*< the label string */
151  uint32_t position; /*< the position of the brw instruction for this label */
152  struct brw_glsl_label *next; /*< next in linked list */
153 };
154 
155 
156 /*
157  * For each OPCODE_CAL we create one of these.
158  */
159 struct brw_glsl_call
160 {
161  uint32_t call_inst_pos; /*< location of the CAL instruction */
162  const char *sub_name; /*< name of subroutine to call */
163  struct brw_glsl_call *next; /*< next in linked list */
164 };
165 
166 
167 /*
168  * Called for each OPCODE_BGNSUB.
169  */
170  void
172 {
173  struct brw_glsl_label *label = calloc(1, sizeof *label);
174  label->name = name;
175  label->position = position;
176  label->next = c->first_label;
177  c->first_label = label;
178 }
179 
180 
181 /*
182  * Called for each OPCODE_CAL.
183  */
184  void
185 brw_save_call(struct brw_compile *c, const char *name, uint32_t call_pos)
186 {
187  struct brw_glsl_call *call = calloc(1, sizeof *call);
188  call->call_inst_pos = call_pos;
189  call->sub_name = name;
190  call->next = c->first_call;
191  c->first_call = call;
192 }
193 
194 
195 /*
196  * Lookup a label, return label's position/offset.
197  */
198  static uint32_t
199 brw_lookup_label(struct brw_compile *c, const char *name)
200 {
201  const struct brw_glsl_label *label;
202  for (label = c->first_label; label; label = label->next) {
203  if (strcmp(name, label->name) == 0) {
204  return label->position;
205  }
206  }
207  abort(); /* should never happen */
208  return ~0;
209 }
210 
211 
212 /*
213  * When we're done generating code, this function is called to resolve
214  * subroutine calls.
215  */
216  void
218 {
219  const struct brw_glsl_call *call;
220 
221  for (call = c->first_call; call; call = call->next) {
222  const uint32_t sub_loc = brw_lookup_label(c, call->sub_name);
223  struct brw_instruction *brw_call_inst = &c->store[call->call_inst_pos];
224  struct brw_instruction *brw_sub_inst = &c->store[sub_loc];
225  int32_t offset = brw_sub_inst - brw_call_inst;
226 
227  /* patch brw_inst1 to point to brw_inst2 */
228  brw_set_src1(brw_call_inst, brw_imm_d(offset * 16));
229  }
230 
231  /* free linked list of calls */
232  {
233  struct brw_glsl_call *call, *next;
234  for (call = c->first_call; call; call = next) {
235  next = call->next;
236  free(call);
237  }
238  c->first_call = NULL;
239  }
240 
241  /* free linked list of labels */
242  {
243  struct brw_glsl_label *label, *next;
244  for (label = c->first_label; label; label = next) {
245  next = label->next;
246  free(label);
247  }
248  c->first_label = NULL;
249  }
250 }
#define name
#define next(a)
Definition: aptex-macros.h:924
#define call
Definition: aptex-macros.h:493
int cairo_bool_t
Definition: cairo.h:107
#define BRW_PREDICATE_NORMAL
#define BRW_MASK_ENABLE
#define BRW_PREDICATE_NONE
#define BRW_COMPRESSION_NONE
struct brw_instruction * brw_MOV(struct brw_compile *p, struct brw_reg dest, struct brw_reg src0)
void brw_set_src1(struct brw_instruction *insn, struct brw_reg reg)
void brw_push_insn_state(struct brw_compile *p)
void brw_pop_insn_state(struct brw_compile *p)
void brw_resolve_cals(struct brw_compile *c)
void brw_set_compression_control(struct brw_compile *p, int compression_control)
void brw_set_conditionalmod(struct brw_compile *p, uint32_t conditional)
void brw_save_label(struct brw_compile *c, const char *name, uint32_t position)
void brw_set_predicate_control_flag_value(struct brw_compile *p, uint32_t value)
void brw_set_predicate_control(struct brw_compile *p, uint32_t pc)
void brw_set_saturate(struct brw_compile *p, uint32_t value)
void brw_set_mask_control(struct brw_compile *p, uint32_t value)
const uint32_t * brw_get_program(struct brw_compile *p, uint32_t *sz)
void brw_compile_init(struct brw_compile *p, cairo_bool_t is_g4x)
void brw_save_call(struct brw_compile *c, const char *name, uint32_t call_pos)
void brw_set_access_mode(struct brw_compile *p, uint32_t access_mode)
#define BRW_EU_MAX_INSN_STACK
static struct brw_reg brw_imm_uw(uint16_t uw)
static struct brw_reg brw_flag_reg(void)
static struct brw_reg brw_imm_d(int32_t d)
static uint32_t brw_lookup_label(struct brw_compile *c, const char *name)
#define free(a)
Definition: decNumber.cpp:310
long pc
Definition: disdvi.c:114
int strcmp()
Definition: coll.cpp:143
#define c(n)
Definition: gpos-common.c:150
#define memcpy(d, s, n)
Definition: gsftopk.c:64
assert(pcxLoadImage24((char *)((void *) 0), fp, pinfo, hdr))
#define NULL
Definition: ftobjs.h:61
small capitals from c petite p
Definition: afcover.h:72
sizeof(AF_ModuleRec)
unsigned int uint32_t
Definition: stdint.h:80
signed int int32_t
Definition: stdint.h:77
voidp calloc()
char conditional[20]
Definition: web2c-lexer.c:709
void abort()
union value value
Definition: obx.h:44
static int sz
Definition: pdftocairo.cc:114
static int offset
Definition: ppmtogif.c:642
bstring c int memset(void *s, int c, int length)
struct brw_glsl_call * next
struct brw_glsl_label * next
struct def_label label[1024]
Definition: t1part.c:286
Definition: obx.h:51
#define position
Definition: xmlparse.c:605