src/mesa/drivers/dri/i965/brw_fs_surface_builder.cpp

   1 /*
   2  * Copyright © 2013-2015 Intel Corporation
   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 "brw_fs_surface_builder.h"
  25 #include "brw_fs.h"
  26
  27 using namespace brw;
  28
  29 namespace brw {
  30    namespace surface_access {
  31       namespace {
  32          /**
  33           * Generate a logical send opcode for a surface message and return
  34           * the result.
  35           */
  36          fs_reg
  37          emit_send(const fs_builder &bld, enum opcode opcode,
  38                    const fs_reg &addr, const fs_reg &src, const fs_reg &surface,
  39                    unsigned dims, unsigned arg, unsigned rsize,
  40                    brw_predicate pred = BRW_PREDICATE_NONE)
  41          {
  42             /* Reduce the dynamically uniform surface index to a single
  43              * scalar.
  44              */
  45             const fs_reg usurface = bld.emit_uniformize(surface);
  46             const fs_reg srcs[] = {
  47                addr, src, usurface, fs_reg(dims), fs_reg(arg)
  48             };
  49             const fs_reg dst = bld.vgrf(BRW_REGISTER_TYPE_UD, rsize);
  50             fs_inst *inst = bld.emit(opcode, dst, srcs, ARRAY_SIZE(srcs));
  51
  52             inst->regs_written = rsize * bld.dispatch_width() / 8;
  53             inst->predicate = pred;
  54             return dst;
  55          }
  56       }
  57
  58       /**
  59        * Emit an untyped surface read opcode.  \p dims determines the number
  60        * of components of the address and \p size the number of components of
  61        * the returned value.
  62        */
  63       fs_reg
  64       emit_untyped_read(const fs_builder &bld,
  65                         const fs_reg &surface, const fs_reg &addr,
  66                         unsigned dims, unsigned size,
  67                         brw_predicate pred)
  68       {
  69          return emit_send(bld, SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL,
  70                           addr, fs_reg(), surface, dims, size, size, pred);
  71       }
  72
  73       /**
  74        * Emit an untyped surface write opcode.  \p dims determines the number
  75        * of components of the address and \p size the number of components of
  76        * the argument.
  77        */
  78       void
  79       emit_untyped_write(const fs_builder &bld, const fs_reg &surface,
  80                          const fs_reg &addr, const fs_reg &src,
  81                          unsigned dims, unsigned size,
  82                          brw_predicate pred)
  83       {
  84          emit_send(bld, SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL,
  85                    addr, src, surface, dims, size, 0, pred);
  86       }
  87
  88       /**
  89        * Emit an untyped surface atomic opcode.  \p dims determines the number
  90        * of components of the address and \p rsize the number of components of
  91        * the returned value (either zero or one).
  92        */
  93       fs_reg
  94       emit_untyped_atomic(const fs_builder &bld,
  95                           const fs_reg &surface, const fs_reg &addr,
  96                           const fs_reg &src0, const fs_reg &src1,
  97                           unsigned dims, unsigned rsize, unsigned op,
  98                           brw_predicate pred)
  99       {
 100          /* FINISHME: Factor out this frequently recurring pattern into a
 101           * helper function.
 102           */
 103          const unsigned n = (src0.file != BAD_FILE) + (src1.file != BAD_FILE);
 104          const fs_reg srcs[] = { src0, src1 };
 105          const fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD, n);
 106          bld.LOAD_PAYLOAD(tmp, srcs, n, 0);
 107
 108          return emit_send(bld, SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL,
 109                           addr, tmp, surface, dims, op, rsize, pred);
 110       }
 111
 112       /**
 113        * Emit a typed surface read opcode.  \p dims determines the number of
 114        * components of the address and \p size the number of components of the
 115        * returned value.
 116        */
 117       fs_reg
 118       emit_typed_read(const fs_builder &bld, const fs_reg &surface,
 119                       const fs_reg &addr, unsigned dims, unsigned size)
 120       {
 121          return emit_send(bld, SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL,
 122                           addr, fs_reg(), surface, dims, size, size);
 123       }
 124
 125       /**
 126        * Emit a typed surface write opcode.  \p dims determines the number of
 127        * components of the address and \p size the number of components of the
 128        * argument.
 129        */
 130       void
 131       emit_typed_write(const fs_builder &bld, const fs_reg &surface,
 132                        const fs_reg &addr, const fs_reg &src,
 133                        unsigned dims, unsigned size)
 134       {
 135          emit_send(bld, SHADER_OPCODE_TYPED_SURFACE_WRITE_LOGICAL,
 136                    addr, src, surface, dims, size, 0);
 137       }
 138
 139       /**
 140        * Emit a typed surface atomic opcode.  \p dims determines the number of
 141        * components of the address and \p rsize the number of components of
 142        * the returned value (either zero or one).
 143        */
 144       fs_reg
 145       emit_typed_atomic(const fs_builder &bld, const fs_reg &surface,
 146                         const fs_reg &addr,
 147                         const fs_reg &src0, const fs_reg &src1,
 148                         unsigned dims, unsigned rsize, unsigned op,
 149                         brw_predicate pred)
 150       {
 151          /* FINISHME: Factor out this frequently recurring pattern into a
 152           * helper function.
 153           */
 154          const unsigned n = (src0.file != BAD_FILE) + (src1.file != BAD_FILE);
 155          const fs_reg srcs[] = { src0, src1 };
 156          const fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD, n);
 157          bld.LOAD_PAYLOAD(tmp, srcs, n, 0);
 158
 159          return emit_send(bld, SHADER_OPCODE_TYPED_ATOMIC_LOGICAL,
 160                           addr, tmp, surface, dims, op, rsize);
 161       }
 162    }
 163 }