qemu/target/hexagon/gen_dectree_import.c
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   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
  30const 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 */
  49const 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
  59const 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
  68const 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
  77const 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
  90static 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
 102static 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
 111static 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
 124static 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
 142static 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
 153static 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
 163static 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
 180int 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}
 202