target/hexagon/gen_semantics.c

   1 /*
   2  *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * This program generates the semantics file that is processed by
  20  * the do_qemu.py script.  We use the C preporcessor to manipulate the
  21  * files imported from the Hexagon architecture library.
  22  */
  23
  24 #include <stdio.h>
  25 #define STRINGIZE(X) #X
  26
  27 int main(int argc, char *argv[])
  28 {
  29     FILE *outfile;
  30
  31     if (argc != 2) {
  32         fprintf(stderr, "Usage: gen_semantics ouptputfile\n");
  33         return 1;
  34     }
  35     outfile = fopen(argv[1], "w");
  36     if (outfile == NULL) {
  37         fprintf(stderr, "Cannot open %s for writing\n", argv[1]);
  38         return 1;
  39     }
  40
  41 /*
  42  * Process the instruction definitions
  43  *     Scalar core instructions have the following form
  44  *         Q6INSN(A2_add,"Rd32=add(Rs32,Rt32)",ATTRIBS(),
  45  *         "Add 32-bit registers",
  46  *         { RdV=RsV+RtV;})
  47  */
  48 #define Q6INSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
  49     do { \
  50         fprintf(outfile, "SEMANTICS( \\\n" \
  51                          "    \"%s\", \\\n" \
  52                          "    %s, \\\n" \
  53                          "    \"\"\"%s\"\"\" \\\n" \
  54                          ")\n", \
  55                 #TAG, STRINGIZE(BEH), STRINGIZE(SEM)); \
  56         fprintf(outfile, "ATTRIBUTES( \\\n" \
  57                          "    \"%s\", \\\n" \
  58                          "    \"%s\" \\\n" \
  59                          ")\n", \
  60                 #TAG, STRINGIZE(ATTRIBS)); \
  61     } while (0);
  62 #include "imported/allidefs.def"
  63 #undef Q6INSN
  64
  65 /*
  66  * Process the macro definitions
  67  *     Macros definitions have the following form
  68  *         DEF_MACRO(
  69  *             fLSBNEW0,
  70  *             predlog_read(thread,0),
  71  *             ()
  72  *         )
  73  * The important part here is the attributes.  Whenever an instruction
  74  * invokes a macro, we add the macro's attributes to the instruction.
  75  */
  76 #define DEF_MACRO(MNAME, BEH, ATTRS) \
  77     fprintf(outfile, "MACROATTRIB( \\\n" \
  78                      "    \"%s\", \\\n" \
  79                      "    \"\"\"%s\"\"\", \\\n" \
  80                      "    \"%s\" \\\n" \
  81                      ")\n", \
  82             #MNAME, STRINGIZE(BEH), STRINGIZE(ATTRS));
  83 #include "imported/macros.def"
  84 #undef DEF_MACRO
  85
  86     fclose(outfile);
  87     return 0;
  88 }