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  */
  44 const char * const opcode_syntax[XX_LAST_OPCODE] = {
  45 #define Q6INSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
  46    [TAG] = BEH,
  47 #define EXTINSN(TAG, BEH, ATTRIBS, DESCR, SEM) \
  48    [TAG] = BEH,
  49 #include "imported/allidefs.def"
  50 #undef Q6INSN
  51 #undef EXTINSN
  52 };
  53
  54 const char * const opcode_rregs[] = {
  55 #define REGINFO(TAG, REGINFO, RREGS, WREGS) RREGS,
  56 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)  /* nothing */
  57 #include "op_regs_generated.h.inc"
  58     NULL
  59 #undef REGINFO
  60 #undef IMMINFO
  61 };
  62
  63 const char * const opcode_wregs[] = {
  64 #define REGINFO(TAG, REGINFO, RREGS, WREGS) WREGS,
  65 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)  /* nothing */
  66 #include "op_regs_generated.h.inc"
  67     NULL
  68 #undef REGINFO
  69 #undef IMMINFO
  70 };
  71
  72 const OpcodeEncoding opcode_encodings[] = {
  73 #define DEF_ENC32(TAG, ENCSTR) \
  74     [TAG] = { .encoding = ENCSTR },
  75 #define DEF_ENC_SUBINSN(TAG, CLASS, ENCSTR) \
  76     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  77 #define DEF_EXT_ENC(TAG, CLASS, ENCSTR) \
  78     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  79 #include "imported/encode.def"
  80 #undef DEF_ENC32
  81 #undef DEF_ENC_SUBINSN
  82 #undef DEF_EXT_ENC
  83 };
  84
  85 static const char * const opcode_enc_class_names[XX_LAST_ENC_CLASS] = {
  86     "NORMAL",
  87     "16BIT",
  88     "SUBINSN_A",
  89     "SUBINSN_L1",
  90     "SUBINSN_L2",
  91     "SUBINSN_S1",
  92     "SUBINSN_S2",
  93     "EXT_noext",
  94     "EXT_mmvec",
  95 };
  96
  97 static const char *get_opcode_enc(int opcode)
  98 {
  99     const char *tmp = opcode_encodings[opcode].encoding;
 100     if (tmp == NULL) {
 101         tmp = "MISSING ENCODING";
 102     }
 103     return tmp;
 104 }
 105
 106 static const char *get_opcode_enc_class(int opcode)
 107 {
 108     return opcode_enc_class_names[opcode_encodings[opcode].enc_class];
 109 }
 110
 111 static void gen_iset_table(FILE *out)
 112 {
 113     int i;
 114
 115     fprintf(out, "iset = {\n");
 116     for (i = 0; i < XX_LAST_OPCODE; i++) {
 117         fprintf(out, "\t\'%s\' : {\n", opcode_names[i]);
 118         fprintf(out, "\t\t\'tag\' : \'%s\',\n", opcode_names[i]);
 119         fprintf(out, "\t\t\'syntax\' : \'%s\',\n", opcode_syntax[i]);
 120         fprintf(out, "\t\t\'rregs\' : \'%s\',\n", opcode_rregs[i]);
 121         fprintf(out, "\t\t\'wregs\' : \'%s\',\n", opcode_wregs[i]);
 122         fprintf(out, "\t\t\'enc\' : \'%s\',\n", get_opcode_enc(i));
 123         fprintf(out, "\t\t\'enc_class\' : \'%s\',\n", get_opcode_enc_class(i));
 124         fprintf(out, "\t},\n");
 125     }
 126     fprintf(out, "};\n\n");
 127 }
 128
 129 static void gen_tags_list(FILE *out)
 130 {
 131     int i;
 132
 133     fprintf(out, "tags = [\n");
 134     for (i = 0; i < XX_LAST_OPCODE; i++) {
 135         fprintf(out, "\t\'%s\',\n", opcode_names[i]);
 136     }
 137     fprintf(out, "];\n\n");
 138 }
 139
 140 static void gen_enc_ext_spaces_table(FILE *out)
 141 {
 142     fprintf(out, "enc_ext_spaces = {\n");
 143 #define DEF_EXT_SPACE(SPACEID, ENCSTR) \
 144     fprintf(out, "\t\'%s\' : \'%s\',\n", #SPACEID, ENCSTR);
 145 #include "imported/encode.def"
 146 #undef DEF_EXT_SPACE
 147     fprintf(out, "};\n\n");
 148 }
 149
 150 static void gen_subinsn_groupings_table(FILE *out)
 151 {
 152     fprintf(out, "subinsn_groupings = {\n");
 153 #define DEF_PACKED32(TAG, TYPEA, TYPEB, ENCSTR) \
 154     do { \
 155         fprintf(out, "\t\'%s\' : {\n", #TAG); \
 156         fprintf(out, "\t\t\'name\' : \'%s\',\n", #TAG); \
 157         fprintf(out, "\t\t\'class_a\' : \'%s\',\n", #TYPEA); \
 158         fprintf(out, "\t\t\'class_b\' : \'%s\',\n", #TYPEB); \
 159         fprintf(out, "\t\t\'enc\' : \'%s\',\n", ENCSTR); \
 160         fprintf(out, "\t},\n"); \
 161     } while (0);
 162 #include "imported/encode.def"
 163 #undef DEF_PACKED32
 164     fprintf(out, "};\n\n");
 165 }
 166
 167 int main(int argc, char *argv[])
 168 {
 169     FILE *outfile;
 170
 171     if (argc != 2) {
 172         fprintf(stderr, "Usage: gen_dectree_import ouptputfile\n");
 173         return 1;
 174     }
 175     outfile = fopen(argv[1], "w");
 176     if (outfile == NULL) {
 177         fprintf(stderr, "Cannot open %s for writing\n", argv[1]);
 178         return 1;
 179     }
 180
 181     gen_iset_table(outfile);
 182     gen_tags_list(outfile);
 183     gen_enc_ext_spaces_table(outfile);
 184     gen_subinsn_groupings_table(outfile);
 185
 186     fclose(outfile);
 187     return 0;
 188 }