src/compiler/spirv/spirv2nir.c

   1 /*
   2  * Copyright © 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  * Authors:
  24  *    Jason Ekstrand (jason@jlekstrand.net)
  25  *
  26  */
  27
  28 /*
  29  * A simple executable that opens a SPIR-V shader, converts it to NIR, and
  30  * dumps out the result.  This should be useful for testing the
  31  * spirv_to_nir code.
  32  */
  33
  34 #include "spirv/nir_spirv.h"
  35
  36 #include <sys/mman.h>
  37 #include <sys/types.h>
  38 #include <fcntl.h>
  39 #include <unistd.h>
  40 #include <stdio.h>
  41 #include <errno.h>
  42 #include <string.h>
  43
  44 #define WORD_SIZE 4
  45
  46 int main(int argc, char **argv)
  47 {
  48    int fd = open(argv[1], O_RDONLY);
  49    if (fd < 0)
  50    {
  51       fprintf(stderr, "Failed to open %s\n", argv[1]);
  52       return 1;
  53    }
  54
  55    off_t len = lseek(fd, 0, SEEK_END);
  56    if (len % WORD_SIZE != 0)
  57    {
  58       fprintf(stderr, "File length isn't a multiple of the word size\n");
  59       fprintf(stderr, "Are you sure this is a valid SPIR-V shader?\n");
  60       close(fd);
  61       return 1;
  62    }
  63
  64    size_t word_count = len / WORD_SIZE;
  65
  66    const void *map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
  67    if (map == MAP_FAILED)
  68    {
  69       fprintf(stderr, "Failed to mmap the file: errno=%d, %s\n",
  70               errno, strerror(errno));
  71       close(fd);
  72       return 1;
  73    }
  74
  75    nir_function *func = spirv_to_nir(map, word_count, NULL, 0,
  76                                      MESA_SHADER_FRAGMENT, "main", NULL, NULL);
  77    nir_print_shader(func->shader, stderr);
  78
  79    return 0;
  80 }