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 char * const opcode_rregs[] = {
  60 #define REGINFO(TAG, REGINFO, RREGS, WREGS) RREGS,
  61 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)  /* nothing */
  62 #include "op_regs_generated.h.inc"
  63     NULL
  64 #undef REGINFO
  65 #undef IMMINFO
  66 };
  67
  68 const char * const opcode_wregs[] = {
  69 #define REGINFO(TAG, REGINFO, RREGS, WREGS) WREGS,
  70 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)  /* nothing */
  71 #include "op_regs_generated.h.inc"
  72     NULL
  73 #undef REGINFO
  74 #undef IMMINFO
  75 };
  76
  77 const OpcodeEncoding opcode_encodings[] = {
  78 #define DEF_ENC32(TAG, ENCSTR) \
  79     [TAG] = { .encoding = ENCSTR },
  80 #define DEF_ENC_SUBINSN(TAG, CLASS, ENCSTR) \
  81     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  82 #define DEF_EXT_ENC(TAG, CLASS, ENCSTR) \
  83     [TAG] = { .encoding = ENCSTR, .enc_class = CLASS },
  84 #include "imported/encode.def"
  85 #undef DEF_ENC32
  86 #undef DEF_ENC_SUBINSN
  87 #undef DEF_EXT_ENC
  88 };
  89
  90 static const char * const opcode_enc_class_names[XX_LAST_ENC_CLASS] = {
  91     "NORMAL",
  92     "16BIT",
  93     "SUBINSN_A",
  94     "SUBINSN_L1",
  95     "SUBINSN_L2",
  96     "SUBINSN_S1",
  97     "SUBINSN_S2",
  98     "EXT_noext",
  99     "EXT_mmvec",
 100 };
 101
 102 static const char *get_opcode_enc(int opcode)
 103 {
 104     const char *tmp = opcode_encodings[opcode].encoding;
 105     if (tmp == NULL) {
 106         tmp = "MISSING ENCODING";
 107     }
 108     return tmp;
 109 }
 110
 111 static const char *get_opcode_enc_class(int opcode)
 112 {
 113     const char *tmp = opcode_encodings[opcode].encoding;
 114     if (tmp == NULL) {
 115         const char *test = "V6_";        /* HVX */
 116         const char *name = opcode_names[opcode];
 117         if (strncmp(name, test, strlen(test)) == 0) {
 118             return "EXT_mmvec";
 119         }
 120     }
 121     return opcode_enc_class_names[opcode_encodings[opcode].enc_class];
 122 }
 123
 124 static void gen_iset_table(FILE *out)
 125 {
 126     int i;
 127
 128     fprintf(out, "iset = {\n");
 129     for (i = 0; i < XX_LAST_OPCODE; i++) {
 130         fprintf(out, "\t\'%s\' : {\n", opcode_names[i]);
 131         fprintf(out, "\t\t\'tag\' : \'%s\',\n", opcode_names[i]);
 132         fprintf(out, "\t\t\'syntax\' : \'%s\',\n", opcode_syntax[i]);
 133         fprintf(out, "\t\t\'rregs\' : \'%s\',\n", opcode_rregs[i]);
 134         fprintf(out, "\t\t\'wregs\' : \'%s\',\n", opcode_wregs[i]);
 135         fprintf(out, "\t\t\'enc\' : \'%s\',\n", get_opcode_enc(i));
 136         fprintf(out, "\t\t\'enc_class\' : \'%s\',\n", get_opcode_enc_class(i));
 137         fprintf(out, "\t},\n");
 138     }
 139     fprintf(out, "};\n\n");
 140 }
 141
 142 static void gen_tags_list(FILE *out)
 143 {
 144     int i;
 145
 146     fprintf(out, "tags = [\n");
 147     for (i = 0; i < XX_LAST_OPCODE; i++) {
 148         fprintf(out, "\t\'%s\',\n", opcode_names[i]);
 149     }
 150     fprintf(out, "];\n\n");
 151 }
 152
 153 static void gen_enc_ext_spaces_table(FILE *out)
 154 {
 155     fprintf(out, "enc_ext_spaces = {\n");
 156 #define DEF_EXT_SPACE(SPACEID, ENCSTR) \
 157     fprintf(out, "\t\'%s\' : \'%s\',\n", #SPACEID, ENCSTR);
 158 #include "imported/encode.def"
 159 #undef DEF_EXT_SPACE
 160     fprintf(out, "};\n\n");
 161 }
 162
 163 static void gen_subinsn_groupings_table(FILE *out)
 164 {
 165     fprintf(out, "subinsn_groupings = {\n");
 166 #define DEF_PACKED32(TAG, TYPEA, TYPEB, ENCSTR) \
 167     do { \
 168         fprintf(out, "\t\'%s\' : {\n", #TAG); \
 169         fprintf(out, "\t\t\'name\' : \'%s\',\n", #TAG); \
 170         fprintf(out, "\t\t\'class_a\' : \'%s\',\n", #TYPEA); \
 171         fprintf(out, "\t\t\'class_b\' : \'%s\',\n", #TYPEB); \
 172         fprintf(out, "\t\t\'enc\' : \'%s\',\n", ENCSTR); \
 173         fprintf(out, "\t},\n"); \
 174     } while (0);
 175 #include "imported/encode.def"
 176 #undef DEF_PACKED32
 177     fprintf(out, "};\n\n");
 178 }
 179
 180 int main(int argc, char *argv[])
 181 {
 182     FILE *outfile;
 183
 184     if (argc != 2) {
 185         fprintf(stderr, "Usage: gen_dectree_import ouptputfile\n");
 186         return 1;
 187     }
 188     outfile = fopen(argv[1], "w");
 189     if (outfile == NULL) {
 190         fprintf(stderr, "Cannot open %s for writing\n", argv[1]);
 191         return 1;
 192     }
 193
 194     gen_iset_table(outfile);
 195     gen_tags_list(outfile);
 196     gen_enc_ext_spaces_table(outfile);
 197     gen_subinsn_groupings_table(outfile);
 198
 199     fclose(outfile);
 200     return 0;
 201 }