target/hexagon/gen_dectree_import.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 encodings file that is processed by
  20  * the dectree.py script to produce the decoding tree.  We use the C
  21  * preprocessor to manipulate the files imported from the Hexagon
  22  * architecture library.
  23  */
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include "opcodes.h"
  27
  28 #define STRINGIZE(X)    #X
  29
  30 const char * const opcode_names[] = {
  31 #define OPCODE(IID) STRINGIZE(IID)
  32 #include "opcodes_def_generated.h.inc"
  33     NULL
  34 #undef OPCODE
  35 };
  36
  37 /*
  38  * Process the instruction definitions
  39  *     Scalar core instructions have the following form
  40  *         Q6INSN(A2_add,"Rd32=add(Rs32,Rt32)",ATTRIBS(),
  41  *         "Add 32-bit registers",
  42  *         { RdV=RsV+RtV;})
  43  *     HVX instructions have the following form
  44  *         EXTINSN(V6_vinsertwr, "Vx32.w=vinsert(Rt32)",
  45  *         ATTRIBS(A_EXTENSION,A_CVI,A_CVI_VX,A_CVI_LATE),
  46  *         "Insert Word Scalar into Vector",
  47  *         VxV.uw[0] = RtV;)
  48  */
  49 const char * const opcode_syntax[XX_LAST_OPCODE] = {
  50 #define Q6INSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
  51    [TAG] = BEH,
  52 #define EXTINSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
  53    [TAG] = BEH,
  54 #include "imported/allidefs.def"
  55 #undef Q6INSN
  56 #undef EXTINSN
  57 };
  58
  59 const OpcodeEncoding opcode_encodings[] = {
  60 #define DEF_ENC32(TAG, ENCSTR) \
  61     [TAG] = { .encoding = ENCSTR },
  62 #define DEF_ENC_SUBINSN(TAG, CLASS, ENCSTR) \
  63     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  64 #define DEF_EXT_ENC(TAG, CLASS, ENCSTR) \
  65     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  66 #include "imported/encode.def"
  67 #undef DEF_ENC32
  68 #undef DEF_ENC_SUBINSN
  69 #undef DEF_EXT_ENC
  70 };
  71
  72 static const char * const opcode_enc_class_names[XX_LAST_ENC_CLASS] = {
  73     "NORMAL",
  74     "16BIT",
  75     "SUBINSN_A",
  76     "SUBINSN_L1",
  77     "SUBINSN_L2",
  78     "SUBINSN_S1",
  79     "SUBINSN_S2",
  80     "EXT_noext",
  81     "EXT_mmvec",
  82 };
  83
  84 static const char *get_opcode_enc(int opcode)
  85 {
  86     const char *tmp = opcode_encodings[opcode].encoding;
  87     if (tmp == NULL) {
  88         tmp = "MISSING ENCODING";
  89     }
  90     return tmp;
  91 }
  92
  93 static const char *get_opcode_enc_class(int opcode)
  94 {
  95     const char *tmp = opcode_encodings[opcode].encoding;
  96     if (tmp == NULL) {
  97         const char *test = "V6_";        /* HVX */
  98         const char *name = opcode_names[opcode];
  99         if (strncmp(name, test, strlen(test)) == 0) {
 100             return "EXT_mmvec";
 101         }
 102     }
 103     return opcode_enc_class_names[opcode_encodings[opcode].enc_class];
 104 }
 105
 106 static void gen_iset_table(FILE *out)
 107 {
 108     int i;
 109
 110     fprintf(out, "iset = {\n");
 111     for (i = 0; i < XX_LAST_OPCODE; i++) {
 112         fprintf(out, "\t\'%s\' : {\n", opcode_names[i]);
 113         fprintf(out, "\t\t\'tag\' : \'%s\',\n", opcode_names[i]);
 114         fprintf(out, "\t\t\'syntax\' : \'%s\',\n", opcode_syntax[i]);
 115         fprintf(out, "\t\t\'enc\' : \'%s\',\n", get_opcode_enc(i));
 116         fprintf(out, "\t\t\'enc_class\' : \'%s\',\n", get_opcode_enc_class(i));
 117         fprintf(out, "\t},\n");
 118     }
 119     fprintf(out, "};\n\n");
 120 }
 121
 122 static void gen_tags_list(FILE *out)
 123 {
 124     int i;
 125
 126     fprintf(out, "tags = [\n");
 127     for (i = 0; i < XX_LAST_OPCODE; i++) {
 128         fprintf(out, "\t\'%s\',\n", opcode_names[i]);
 129     }
 130     fprintf(out, "];\n\n");
 131 }
 132
 133 int main(int argc, char *argv[])
 134 {
 135     FILE *outfile;
 136
 137     if (argc != 2) {
 138         fprintf(stderr, "Usage: gen_dectree_import ouptputfile\n");
 139         return 1;
 140     }
 141     outfile = fopen(argv[1], "w");
 142     if (outfile == NULL) {
 143         fprintf(stderr, "Cannot open %s for writing\n", argv[1]);
 144         return 1;
 145     }
 146
 147     gen_iset_table(outfile);
 148     gen_tags_list(outfile);
 149
 150     fclose(outfile);
 151     return 0;
 152 }