src/gallium/drivers/vc4/vc4_qir.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdio.h>
  25
  26 #include "util/u_memory.h"
  27 #include "util/u_simple_list.h"
  28
  29 #include "vc4_qir.h"
  30 #include "vc4_qpu.h"
  31
  32 struct qir_op_info {
  33         const char *name;
  34         uint8_t ndst, nsrc;
  35 };
  36
  37 static const struct qir_op_info qir_op_info[] = {
  38         [QOP_MOV] = { "mov", 1, 1 },
  39         [QOP_FADD] = { "fadd", 1, 2 },
  40         [QOP_FSUB] = { "fsub", 1, 2 },
  41         [QOP_FMUL] = { "fmul", 1, 2 },
  42         [QOP_FMIN] = { "fmin", 1, 2 },
  43         [QOP_FMAX] = { "fmax", 1, 2 },
  44         [QOP_FMINABS] = { "fminabs", 1, 2 },
  45         [QOP_FMAXABS] = { "fmaxabs", 1, 2 },
  46
  47         [QOP_SEQ] = { "seq", 1, 2 },
  48         [QOP_SNE] = { "sne", 1, 2 },
  49         [QOP_SGE] = { "sge", 1, 2 },
  50         [QOP_SLT] = { "slt", 1, 2 },
  51         [QOP_CMP] = { "cmp", 1, 3 },
  52
  53         [QOP_FTOI] = { "ftoi", 1, 1 },
  54         [QOP_RCP] = { "rcp", 1, 1 },
  55         [QOP_RSQ] = { "rsq", 1, 1 },
  56         [QOP_EXP2] = { "exp2", 1, 2 },
  57         [QOP_LOG2] = { "log2", 1, 2 },
  58         [QOP_PACK_COLORS] = { "pack_colors", 1, 4 },
  59         [QOP_PACK_SCALED] = { "pack_scaled", 1, 2 },
  60         [QOP_VPM_WRITE] = { "vpm_write", 0, 1 },
  61         [QOP_VPM_READ] = { "vpm_read", 0, 1 },
  62         [QOP_TLB_COLOR_WRITE] = { "tlb_color", 0, 1 },
  63         [QOP_VARY_ADD_C] = { "vary_add_c", 1, 1 },
  64 };
  65
  66 static const char *
  67 qir_get_op_name(enum qop qop)
  68 {
  69         if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
  70                 return qir_op_info[qop].name;
  71         else
  72                 return "???";
  73 }
  74
  75 int
  76 qir_get_op_nsrc(enum qop qop)
  77 {
  78         if (qop < ARRAY_SIZE(qir_op_info) && qir_op_info[qop].name)
  79                 return qir_op_info[qop].nsrc;
  80         else
  81                 abort();
  82 }
  83
  84 static void
  85 qir_print_reg(struct qreg reg)
  86 {
  87         const char *files[] = {
  88                 [QFILE_TEMP] = "t",
  89                 [QFILE_VARY] = "v",
  90                 [QFILE_UNIF] = "u",
  91         };
  92
  93         if (reg.file == QFILE_NULL)
  94                 fprintf(stderr, "null");
  95         else
  96                 fprintf(stderr, "%s%d", files[reg.file], reg.index);
  97 }
  98
  99 void
 100 qir_dump_inst(struct qinst *inst)
 101 {
 102         fprintf(stderr, "%s ", qir_get_op_name(inst->op));
 103
 104         qir_print_reg(inst->dst);
 105         for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
 106                 fprintf(stderr, ", ");
 107                 qir_print_reg(inst->src[i]);
 108         }
 109 }
 110
 111 void
 112 qir_dump(struct qcompile *c)
 113 {
 114         struct simple_node *node;
 115
 116         foreach(node, &c->instructions) {
 117                 struct qinst *inst = (struct qinst *)node;
 118                 qir_dump_inst(inst);
 119                 fprintf(stderr, "\n");
 120         }
 121 }
 122
 123 struct qreg
 124 qir_get_temp(struct qcompile *c)
 125 {
 126         struct qreg reg;
 127
 128         reg.file = QFILE_TEMP;
 129         reg.index = c->num_temps++;
 130
 131         return reg;
 132 }
 133
 134 struct qinst *
 135 qir_inst(enum qop op, struct qreg dst, struct qreg src0, struct qreg src1)
 136 {
 137         struct qinst *inst = CALLOC_STRUCT(qinst);
 138
 139         inst->op = op;
 140         inst->dst = dst;
 141         inst->src = calloc(2, sizeof(inst->src[0]));
 142         inst->src[0] = src0;
 143         inst->src[1] = src1;
 144
 145         return inst;
 146 }
 147
 148 struct qinst *
 149 qir_inst4(enum qop op, struct qreg dst,
 150           struct qreg a,
 151           struct qreg b,
 152           struct qreg c,
 153           struct qreg d)
 154 {
 155         struct qinst *inst = CALLOC_STRUCT(qinst);
 156
 157         inst->op = op;
 158         inst->dst = dst;
 159         inst->src = calloc(4, sizeof(*inst->src));
 160         inst->src[0] = a;
 161         inst->src[1] = b;
 162         inst->src[2] = c;
 163         inst->src[3] = d;
 164
 165         return inst;
 166 }
 167
 168 void
 169 qir_emit(struct qcompile *c, struct qinst *inst)
 170 {
 171         insert_at_tail(&c->instructions, &inst->link);
 172 }
 173
 174 struct qcompile *
 175 qir_compile_init(void)
 176 {
 177         struct qcompile *c = CALLOC_STRUCT(qcompile);
 178
 179         make_empty_list(&c->instructions);
 180
 181         return c;
 182 }
 183
 184 void
 185 qir_compile_destroy(struct qcompile *c)
 186 {
 187         free(c);
 188 }
 189
 190 const char *
 191 qir_get_stage_name(enum qstage stage)
 192 {
 193         static const char *names[] = {
 194                 [QSTAGE_FRAG] = "FS",
 195                 [QSTAGE_VERT] = "VS",
 196                 [QSTAGE_COORD] = "CS",
 197         };
 198
 199         return names[stage];
 200 }