target/hexagon/opcodes.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  * opcodes.c
  20  *
  21  * data tables generated automatically
  22  * Maybe some functions too
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "attribs.h"
  27 #include "decode.h"
  28
  29 #define VEC_DESCR(A, B, C) DESCR(A, B, C)
  30 #define DONAME(X) #X
  31
  32 const char * const opcode_names[] = {
  33 #define OPCODE(IID) DONAME(IID)
  34 #include "opcodes_def_generated.h.inc"
  35     NULL
  36 #undef OPCODE
  37 };
  38
  39 const char * const opcode_reginfo[] = {
  40 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)    /* nothing */
  41 #define REGINFO(TAG, REGINFO, RREGS, WREGS) REGINFO,
  42 #include "op_regs_generated.h.inc"
  43     NULL
  44 #undef REGINFO
  45 #undef IMMINFO
  46 };
  47
  48
  49 const char * const opcode_rregs[] = {
  50 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)    /* nothing */
  51 #define REGINFO(TAG, REGINFO, RREGS, WREGS) RREGS,
  52 #include "op_regs_generated.h.inc"
  53     NULL
  54 #undef REGINFO
  55 #undef IMMINFO
  56 };
  57
  58
  59 const char * const opcode_wregs[] = {
  60 #define IMMINFO(TAG, SIGN, SIZE, SHAMT, SIGN2, SIZE2, SHAMT2)    /* nothing */
  61 #define REGINFO(TAG, REGINFO, RREGS, WREGS) WREGS,
  62 #include "op_regs_generated.h.inc"
  63     NULL
  64 #undef REGINFO
  65 #undef IMMINFO
  66 };
  67
  68 const char * const opcode_short_semantics[] = {
  69 #define DEF_SHORTCODE(TAG, SHORTCODE)              [TAG] = #SHORTCODE,
  70 #include "shortcode_generated.h.inc"
  71 #undef DEF_SHORTCODE
  72     NULL
  73 };
  74
  75 DECLARE_BITMAP(opcode_attribs[XX_LAST_OPCODE], A_ZZ_LASTATTRIB);
  76
  77 static void init_attribs(int tag, ...)
  78 {
  79     va_list ap;
  80     int attr;
  81     va_start(ap, tag);
  82     while ((attr = va_arg(ap, int)) != 0) {
  83         set_bit(attr, opcode_attribs[tag]);
  84     }
  85     va_end(ap);
  86 }
  87
  88 const OpcodeEncoding opcode_encodings[] = {
  89 #define DEF_ENC32(OPCODE, ENCSTR) \
  90     [OPCODE] = { .encoding = ENCSTR },
  91
  92 #define DEF_ENC_SUBINSN(OPCODE, CLASS, ENCSTR) \
  93     [OPCODE] = { .encoding = ENCSTR, .enc_class = CLASS },
  94
  95 #define DEF_EXT_ENC(OPCODE, CLASS, ENCSTR) \
  96     [OPCODE] = { .encoding = ENCSTR, .enc_class = CLASS },
  97
  98 #include "imported/encode.def"
  99
 100 #undef DEF_ENC32
 101 #undef DEF_ENC_SUBINSN
 102 #undef DEF_EXT_ENC
 103 };
 104
 105 void opcode_init(void)
 106 {
 107     init_attribs(0, 0);
 108
 109 #define ATTRIBS(...) , ## __VA_ARGS__, 0
 110 #define OP_ATTRIB(TAG, ARGS) init_attribs(TAG ARGS);
 111 #include "op_attribs_generated.h.inc"
 112 #undef OP_ATTRIB
 113 #undef ATTRIBS
 114
 115     decode_init();
 116 }
 117
 118
 119 #define NEEDLE "IMMEXT("
 120
 121 int opcode_which_immediate_is_extended(Opcode opcode)
 122 {
 123     const char *p;
 124
 125     g_assert(opcode < XX_LAST_OPCODE);
 126     g_assert(GET_ATTRIB(opcode, A_EXTENDABLE));
 127
 128     p = opcode_short_semantics[opcode];
 129     p = strstr(p, NEEDLE);
 130     g_assert(p);
 131     p += strlen(NEEDLE);
 132     while (isspace(*p)) {
 133         p++;
 134     }
 135     /* lower is always imm 0, upper always imm 1. */
 136     if (islower(*p)) {
 137         return 0;
 138     } else if (isupper(*p)) {
 139         return 1;
 140     } else {
 141         g_assert_not_reached();
 142     }
 143 }