src/gallium/drivers/freedreno/ir3/ir3_nir.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2015 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29
  30 #include "freedreno_util.h"
  31
  32 #include "ir3_nir.h"
  33 #include "ir3_compiler.h"
  34 #include "ir3_shader.h"
  35
  36 #include "nir/tgsi_to_nir.h"
  37
  38 struct nir_shader *
  39 ir3_tgsi_to_nir(const struct tgsi_token *tokens)
  40 {
  41         static const nir_shader_compiler_options options = {
  42                         .lower_fpow = true,
  43                         .lower_fsat = true,
  44                         .lower_scmp = true,
  45                         .lower_flrp = true,
  46                         .lower_ffract = true,
  47                         .native_integers = true,
  48                         .lower_extract_byte = true,
  49                         .lower_extract_word = true,
  50         };
  51         return tgsi_to_nir(tokens, &options);
  52 }
  53
  54 /* for given shader key, are any steps handled in nir? */
  55 bool
  56 ir3_key_lowers_nir(const struct ir3_shader_key *key)
  57 {
  58         return key->fsaturate_s | key->fsaturate_t | key->fsaturate_r |
  59                         key->vsaturate_s | key->vsaturate_t | key->vsaturate_r |
  60                         key->ucp_enables | key->color_two_side;
  61 }
  62
  63 #define OPT(nir, pass, ...) ({                             \
  64    bool this_progress = false;                             \
  65    NIR_PASS(this_progress, nir, pass, ##__VA_ARGS__);      \
  66    this_progress;                                          \
  67 })
  68
  69 #define OPT_V(nir, pass, ...) NIR_PASS_V(nir, pass, ##__VA_ARGS__)
  70
  71 struct nir_shader *
  72 ir3_optimize_nir(struct ir3_shader *shader, nir_shader *s,
  73                 const struct ir3_shader_key *key)
  74 {
  75         struct nir_lower_tex_options tex_options = {
  76                         .lower_rect = 0,
  77         };
  78         bool progress;
  79
  80         if (key) {
  81                 switch (shader->type) {
  82                 case SHADER_FRAGMENT:
  83                 case SHADER_COMPUTE:
  84                         tex_options.saturate_s = key->fsaturate_s;
  85                         tex_options.saturate_t = key->fsaturate_t;
  86                         tex_options.saturate_r = key->fsaturate_r;
  87                         break;
  88                 case SHADER_VERTEX:
  89                         tex_options.saturate_s = key->vsaturate_s;
  90                         tex_options.saturate_t = key->vsaturate_t;
  91                         tex_options.saturate_r = key->vsaturate_r;
  92                         break;
  93                 }
  94         }
  95
  96         if (shader->compiler->gpu_id >= 400) {
  97                 /* a4xx seems to have *no* sam.p */
  98                 tex_options.lower_txp = ~0;  /* lower all txp */
  99         } else {
 100                 /* a3xx just needs to avoid sam.p for 3d tex */
 101                 tex_options.lower_txp = (1 << GLSL_SAMPLER_DIM_3D);
 102         }
 103
 104         if (fd_mesa_debug & FD_DBG_DISASM) {
 105                 debug_printf("----------------------\n");
 106                 nir_print_shader(s, stdout);
 107                 debug_printf("----------------------\n");
 108         }
 109
 110         OPT_V(s, nir_opt_global_to_local);
 111         OPT_V(s, nir_convert_to_ssa);
 112
 113         if (key) {
 114                 if (s->stage == MESA_SHADER_VERTEX) {
 115                         OPT_V(s, nir_lower_clip_vs, key->ucp_enables);
 116                 } else if (s->stage == MESA_SHADER_FRAGMENT) {
 117                         OPT_V(s, nir_lower_clip_fs, key->ucp_enables);
 118                 }
 119                 if (key->color_two_side) {
 120                         OPT_V(s, nir_lower_two_sided_color);
 121                 }
 122         }
 123
 124         OPT_V(s, nir_lower_tex, &tex_options);
 125         OPT_V(s, nir_lower_idiv);
 126         OPT_V(s, nir_lower_load_const_to_scalar);
 127
 128         do {
 129                 progress = false;
 130
 131                 OPT_V(s, nir_lower_vars_to_ssa);
 132                 OPT_V(s, nir_lower_alu_to_scalar);
 133                 OPT_V(s, nir_lower_phis_to_scalar);
 134
 135                 progress |= OPT(s, nir_copy_prop);
 136                 progress |= OPT(s, nir_opt_dce);
 137                 progress |= OPT(s, nir_opt_cse);
 138                 progress |= OPT(s, ir3_nir_lower_if_else);
 139                 progress |= OPT(s, nir_opt_algebraic);
 140                 progress |= OPT(s, nir_opt_constant_folding);
 141
 142         } while (progress);
 143
 144         OPT_V(s, nir_remove_dead_variables);
 145
 146         if (fd_mesa_debug & FD_DBG_DISASM) {
 147                 debug_printf("----------------------\n");
 148                 nir_print_shader(s, stdout);
 149                 debug_printf("----------------------\n");
 150         }
 151
 152         nir_sweep(s);
 153
 154         return s;
 155 }