2 * Copyright © 2014 Broadcom
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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
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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:
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
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
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20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "util/u_memory.h"
25 #include "util/ralloc.h"
33 bool has_side_effects;
36 static const struct qir_op_info qir_op_info[] = {
37 [QOP_MOV] = { "mov", 1, 1 },
38 [QOP_FMOV] = { "fmov", 1, 1 },
39 [QOP_MMOV] = { "mmov", 1, 1 },
40 [QOP_FADD] = { "fadd", 1, 2 },
41 [QOP_FSUB] = { "fsub", 1, 2 },
42 [QOP_FMUL] = { "fmul", 1, 2 },
43 [QOP_MUL24] = { "mul24", 1, 2 },
44 [QOP_V8MULD] = {"v8muld", 1, 2 },
45 [QOP_V8MIN] = {"v8min", 1, 2 },
46 [QOP_V8MAX] = {"v8max", 1, 2 },
47 [QOP_V8ADDS] = {"v8adds", 1, 2 },
48 [QOP_V8SUBS] = {"v8subs", 1, 2 },
49 [QOP_FMIN] = { "fmin", 1, 2 },
50 [QOP_FMAX] = { "fmax", 1, 2 },
51 [QOP_FMINABS] = { "fminabs", 1, 2 },
52 [QOP_FMAXABS] = { "fmaxabs", 1, 2 },
53 [QOP_FTOI] = { "ftoi", 1, 1 },
54 [QOP_ITOF] = { "itof", 1, 1 },
55 [QOP_ADD] = { "add", 1, 2 },
56 [QOP_SUB] = { "sub", 1, 2 },
57 [QOP_SHR] = { "shr", 1, 2 },
58 [QOP_ASR] = { "asr", 1, 2 },
59 [QOP_SHL] = { "shl", 1, 2 },
60 [QOP_MIN] = { "min", 1, 2 },
61 [QOP_MAX] = { "max", 1, 2 },
62 [QOP_AND] = { "and", 1, 2 },
63 [QOP_OR] = { "or", 1, 2 },
64 [QOP_XOR] = { "xor", 1, 2 },
65 [QOP_NOT] = { "not", 1, 1 },
67 [QOP_RCP] = { "rcp", 1, 1 },
68 [QOP_RSQ] = { "rsq", 1, 1 },
69 [QOP_EXP2] = { "exp2", 1, 2 },
70 [QOP_LOG2] = { "log2", 1, 2 },
71 [QOP_TLB_COLOR_READ] = { "tlb_color_read", 1, 0 },
72 [QOP_MS_MASK] = { "ms_mask", 0, 1, true },
73 [QOP_VARY_ADD_C] = { "vary_add_c", 1, 1 },
75 [QOP_FRAG_X] = { "frag_x", 1, 0 },
76 [QOP_FRAG_Y] = { "frag_y", 1, 0 },
77 [QOP_FRAG_Z] = { "frag_z", 1, 0 },
78 [QOP_FRAG_W] = { "frag_w", 1, 0 },
79 [QOP_FRAG_REV_FLAG] = { "frag_rev_flag", 1, 0 },
81 [QOP_TEX_S] = { "tex_s", 0, 2 },
82 [QOP_TEX_T] = { "tex_t", 0, 2 },
83 [QOP_TEX_R] = { "tex_r", 0, 2 },
84 [QOP_TEX_B] = { "tex_b", 0, 2 },
85 [QOP_TEX_DIRECT] = { "tex_direct", 0, 2 },
86 [QOP_TEX_RESULT] = { "tex_result", 1, 0, true },
90 qir_get_op_name(enum qop qop)
92 if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
93 return qir_op_info[qop].name;
99 qir_get_op_nsrc(enum qop qop)
101 if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
102 return qir_op_info[qop].nsrc;
108 * Returns whether the instruction has any side effects that must be
112 qir_has_side_effects(struct vc4_compile *c, struct qinst *inst)
114 switch (inst->dst.file) {
115 case QFILE_TLB_Z_WRITE:
116 case QFILE_TLB_COLOR_WRITE:
117 case QFILE_TLB_COLOR_WRITE_MS:
118 case QFILE_TLB_STENCIL_SETUP:
124 return qir_op_info[inst->op].has_side_effects;
128 qir_has_side_effect_reads(struct vc4_compile *c, struct qinst *inst)
130 /* We can dead-code eliminate varyings, because we only tell the VS
131 * about the live ones at the end. But we have to preserve the
132 * point/line coordinates reads, because they're generated by
133 * fixed-function hardware.
135 for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
136 if (inst->src[i].file == QFILE_VARY &&
137 c->input_slots[inst->src[i].index].slot == 0xff) {
141 if (inst->src[i].file == QFILE_VPM)
145 if (inst->dst.file == QFILE_VPM)
152 qir_is_mul(struct qinst *inst)
170 qir_is_float_input(struct qinst *inst)
189 qir_is_raw_mov(struct qinst *inst)
191 return ((inst->op == QOP_MOV ||
192 inst->op == QOP_FMOV ||
193 inst->op == QOP_MMOV) &&
194 inst->cond == QPU_COND_ALWAYS &&
200 qir_is_tex(struct qinst *inst)
202 return inst->op >= QOP_TEX_S && inst->op <= QOP_TEX_DIRECT;
206 qir_depends_on_flags(struct qinst *inst)
208 return (inst->cond != QPU_COND_ALWAYS &&
209 inst->cond != QPU_COND_NEVER);
213 qir_writes_r4(struct qinst *inst)
217 case QOP_TLB_COLOR_READ:
229 qir_print_reg(struct vc4_compile *c, struct qreg reg, bool write)
231 static const char *files[] = {
235 [QFILE_TLB_COLOR_WRITE] = "tlb_c",
236 [QFILE_TLB_COLOR_WRITE_MS] = "tlb_c_ms",
237 [QFILE_TLB_Z_WRITE] = "tlb_z",
238 [QFILE_TLB_STENCIL_SETUP] = "tlb_stencil",
244 fprintf(stderr, "null");
247 case QFILE_SMALL_IMM:
248 if ((int)reg.index >= -16 && (int)reg.index <= 15)
249 fprintf(stderr, "%d", reg.index);
251 fprintf(stderr, "%f", uif(reg.index));
256 fprintf(stderr, "vpm");
258 fprintf(stderr, "vpm%d.%d",
259 reg.index / 4, reg.index % 4);
263 case QFILE_TLB_COLOR_WRITE:
264 case QFILE_TLB_COLOR_WRITE_MS:
265 case QFILE_TLB_Z_WRITE:
266 case QFILE_TLB_STENCIL_SETUP:
267 fprintf(stderr, "%s", files[reg.file]);
271 fprintf(stderr, "%s%d", files[reg.file], reg.index);
275 if (reg.file == QFILE_UNIF &&
276 c->uniform_contents[reg.index] == QUNIFORM_CONSTANT) {
277 fprintf(stderr, " (0x%08x / %f)",
278 c->uniform_data[reg.index],
279 uif(c->uniform_data[reg.index]));
284 qir_dump_inst(struct vc4_compile *c, struct qinst *inst)
286 static const char *conditions[] = {
287 [QPU_COND_ALWAYS] = "",
288 [QPU_COND_NEVER] = ".never",
289 [QPU_COND_ZS] = ".zs",
290 [QPU_COND_ZC] = ".zc",
291 [QPU_COND_NS] = ".ns",
292 [QPU_COND_NC] = ".nc",
293 [QPU_COND_CS] = ".cs",
294 [QPU_COND_CC] = ".cc",
296 fprintf(stderr, "%s%s%s ",
297 qir_get_op_name(inst->op),
298 conditions[inst->cond],
299 inst->sf ? ".sf" : "");
301 qir_print_reg(c, inst->dst, true);
302 if (inst->dst.pack) {
303 if (inst->dst.pack) {
304 if (qir_is_mul(inst))
305 vc4_qpu_disasm_pack_mul(stderr, inst->dst.pack);
307 vc4_qpu_disasm_pack_a(stderr, inst->dst.pack);
310 for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
311 fprintf(stderr, ", ");
312 qir_print_reg(c, inst->src[i], false);
313 vc4_qpu_disasm_unpack(stderr, inst->src[i].pack);
318 qir_dump(struct vc4_compile *c)
320 list_for_each_entry(struct qinst, inst, &c->instructions, link) {
321 qir_dump_inst(c, inst);
322 fprintf(stderr, "\n");
327 qir_get_temp(struct vc4_compile *c)
331 reg.file = QFILE_TEMP;
332 reg.index = c->num_temps++;
335 if (c->num_temps > c->defs_array_size) {
336 uint32_t old_size = c->defs_array_size;
337 c->defs_array_size = MAX2(old_size * 2, 16);
338 c->defs = reralloc(c, c->defs, struct qinst *,
340 memset(&c->defs[old_size], 0,
341 sizeof(c->defs[0]) * (c->defs_array_size - old_size));
348 qir_inst(enum qop op, struct qreg dst, struct qreg src0, struct qreg src1)
350 struct qinst *inst = CALLOC_STRUCT(qinst);
354 inst->src = calloc(2, sizeof(inst->src[0]));
357 inst->cond = QPU_COND_ALWAYS;
363 qir_inst4(enum qop op, struct qreg dst,
369 struct qinst *inst = CALLOC_STRUCT(qinst);
373 inst->src = calloc(4, sizeof(*inst->src));
383 qir_emit(struct vc4_compile *c, struct qinst *inst)
385 if (inst->dst.file == QFILE_TEMP)
386 c->defs[inst->dst.index] = inst;
388 qir_emit_nodef(c, inst);
392 qir_reg_equals(struct qreg a, struct qreg b)
394 return a.file == b.file && a.index == b.index;
398 qir_compile_init(void)
400 struct vc4_compile *c = rzalloc(NULL, struct vc4_compile);
402 list_inithead(&c->instructions);
404 c->output_position_index = -1;
405 c->output_color_index = -1;
406 c->output_point_size_index = -1;
407 c->output_sample_mask_index = -1;
409 c->def_ht = _mesa_hash_table_create(c, _mesa_hash_pointer,
410 _mesa_key_pointer_equal);
416 qir_remove_instruction(struct vc4_compile *c, struct qinst *qinst)
418 if (qinst->dst.file == QFILE_TEMP)
419 c->defs[qinst->dst.index] = NULL;
421 list_del(&qinst->link);
427 qir_follow_movs(struct vc4_compile *c, struct qreg reg)
431 while (reg.file == QFILE_TEMP &&
432 c->defs[reg.index] &&
433 (c->defs[reg.index]->op == QOP_MOV ||
434 c->defs[reg.index]->op == QOP_FMOV ||
435 c->defs[reg.index]->op == QOP_MMOV)&&
436 !c->defs[reg.index]->dst.pack &&
437 !c->defs[reg.index]->src[0].pack) {
438 reg = c->defs[reg.index]->src[0];
446 qir_compile_destroy(struct vc4_compile *c)
448 while (!list_empty(&c->instructions)) {
449 struct qinst *qinst =
450 (struct qinst *)c->instructions.next;
451 qir_remove_instruction(c, qinst);
458 qir_get_stage_name(enum qstage stage)
460 static const char *names[] = {
461 [QSTAGE_FRAG] = "FS",
462 [QSTAGE_VERT] = "VS",
463 [QSTAGE_COORD] = "CS",
470 qir_uniform(struct vc4_compile *c,
471 enum quniform_contents contents,
474 for (int i = 0; i < c->num_uniforms; i++) {
475 if (c->uniform_contents[i] == contents &&
476 c->uniform_data[i] == data) {
477 return qir_reg(QFILE_UNIF, i);
481 uint32_t uniform = c->num_uniforms++;
483 if (uniform >= c->uniform_array_size) {
484 c->uniform_array_size = MAX2(MAX2(16, uniform + 1),
485 c->uniform_array_size * 2);
487 c->uniform_data = reralloc(c, c->uniform_data,
489 c->uniform_array_size);
490 c->uniform_contents = reralloc(c, c->uniform_contents,
491 enum quniform_contents,
492 c->uniform_array_size);
495 c->uniform_contents[uniform] = contents;
496 c->uniform_data[uniform] = data;
498 return qir_reg(QFILE_UNIF, uniform);
502 qir_SF(struct vc4_compile *c, struct qreg src)
504 struct qinst *last_inst = NULL;
505 if (!list_empty(&c->instructions))
506 last_inst = (struct qinst *)c->instructions.prev;
508 /* We don't have any way to guess which kind of MOV is implied. */
511 if (src.file != QFILE_TEMP ||
512 !c->defs[src.index] ||
513 last_inst != c->defs[src.index]) {
514 last_inst = qir_MOV_dest(c, qir_reg(QFILE_NULL, 0), src);
515 last_inst = (struct qinst *)c->instructions.prev;
517 last_inst->sf = true;
520 #define OPTPASS(func) \
522 bool stage_progress = func(c); \
523 if (stage_progress) { \
525 if (print_opt_debug) { \
527 "QIR opt pass %2d: %s progress\n", \
534 qir_optimize(struct vc4_compile *c)
536 bool print_opt_debug = false;
540 bool progress = false;
542 OPTPASS(qir_opt_algebraic);
543 OPTPASS(qir_opt_cse);
544 OPTPASS(qir_opt_constant_folding);
545 OPTPASS(qir_opt_copy_propagation);
546 OPTPASS(qir_opt_dead_code);
547 OPTPASS(qir_opt_small_immediates);
548 OPTPASS(qir_opt_vpm);