opcodes/moxie-opc.c

   1 /* moxie-opc.c -- Definitions for moxie opcodes.
   2    Copyright 2009 Free Software Foundation, Inc.
   3    Contributed by Anthony Green (green@moxielogic.com).
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this file; see the file COPYING.  If not, write to the
  19    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "opcode/moxie.h"
  24
  25 /* The moxie processor's 16-bit instructions come in two forms:
  26
  27   FORM 1 instructions start with a 0 bit...
  28
  29     0oooooooaaaabbbb
  30     0              F
  31
  32    ooooooo - form 1 opcode number
  33    aaaa    - operand A
  34    bbbb    - operand B
  35
  36   FORM 2 instructions start with bits "10"...
  37
  38     10ooaaaavvvvvvvv
  39     0              F
  40
  41    oo       - form 2 opcode number
  42    aaaa     - operand A
  43    vvvvvvvv - 8-bit immediate value
  44
  45   FORM 3 instructions start with a bits "11"...
  46
  47     11oooovvvvvvvvvv
  48     0              F
  49
  50    oooo         - form 3 opcode number
  51    vvvvvvvvvv   - 10-bit immediate value.  */
  52
  53 /* Note that currently two opcodes are reserved as bad, so that all
  54    instructions starting with 0x00 and 0xff fault.  */
  55
  56 const moxie_opc_info_t moxie_form1_opc_info[64] =
  57   {
  58     { 0x00, MOXIE_F1_NARG, "bad" },  // Reserved as bad.
  59     { 0x01, MOXIE_F1_A4,   "ldi.l" },
  60     { 0x02, MOXIE_F1_AB,   "mov" },
  61     { 0x03, MOXIE_F1_M,    "jsra" },
  62     { 0x04, MOXIE_F1_NARG, "ret" },
  63     { 0x05, MOXIE_F1_AB,   "add.l" },
  64     { 0x06, MOXIE_F1_AB,   "push" },
  65     { 0x07, MOXIE_F1_AB,   "pop" },
  66     { 0x08, MOXIE_F1_A4,   "lda.l" },
  67     { 0x09, MOXIE_F1_4A,   "sta.l" },
  68     { 0x0a, MOXIE_F1_ABi,  "ld.l" },
  69     { 0x0b, MOXIE_F1_AiB,  "st.l" },
  70     { 0x0c, MOXIE_F1_ABi4, "ldo.l" },
  71     { 0x0d, MOXIE_F1_AiB4, "sto.l" },
  72     { 0x0e, MOXIE_F1_AB,   "cmp" },
  73     { 0x0f, MOXIE_F1_NARG, "nop" },
  74     { 0x10, MOXIE_F1_NARG, "bad" },
  75     { 0x11, MOXIE_F1_NARG, "bad" },
  76     { 0x12, MOXIE_F1_NARG, "bad" },
  77     { 0x13, MOXIE_F1_NARG, "bad" },
  78     { 0x14, MOXIE_F1_NARG, "bad" },
  79     { 0x15, MOXIE_F1_NARG, "bad" },
  80     { 0x16, MOXIE_F1_NARG, "bad" },
  81     { 0x17, MOXIE_F1_NARG, "bad" },
  82     { 0x18, MOXIE_F1_NARG, "bad" },
  83     { 0x19, MOXIE_F1_A,    "jsr" },
  84     { 0x1a, MOXIE_F1_M,    "jmpa" },
  85     { 0x1b, MOXIE_F1_A4,   "ldi.b" },
  86     { 0x1c, MOXIE_F1_ABi,  "ld.b" },
  87     { 0x1d, MOXIE_F1_A4,   "lda.b" },
  88     { 0x1e, MOXIE_F1_AiB,  "st.b" },
  89     { 0x1f, MOXIE_F1_4A,   "sta.b" },
  90     { 0x20, MOXIE_F1_A4,   "ldi.s" },
  91     { 0x21, MOXIE_F1_ABi,  "ld.s" },
  92     { 0x22, MOXIE_F1_A4,   "lda.s" },
  93     { 0x23, MOXIE_F1_AiB,  "st.s" },
  94     { 0x24, MOXIE_F1_4A,   "sta.s" },
  95     { 0x25, MOXIE_F1_A,    "jmp" },
  96     { 0x26, MOXIE_F1_AB,   "and" },
  97     { 0x27, MOXIE_F1_AB,   "lshr" },
  98     { 0x28, MOXIE_F1_AB,   "ashl" },
  99     { 0x29, MOXIE_F1_AB,   "sub.l" },
 100     { 0x2a, MOXIE_F1_AB,   "neg" },
 101     { 0x2b, MOXIE_F1_AB,   "or" },
 102     { 0x2c, MOXIE_F1_AB,   "not" },
 103     { 0x2d, MOXIE_F1_AB,   "ashr" },
 104     { 0x2e, MOXIE_F1_AB,   "xor" },
 105     { 0x2f, MOXIE_F1_AB,   "mul.l" },
 106     { 0x30, MOXIE_F1_4,    "swi" },
 107     { 0x31, MOXIE_F1_AB,   "div.l" },
 108     { 0x32, MOXIE_F1_AB,   "udiv.l" },
 109     { 0x33, MOXIE_F1_AB,   "mod.l" },
 110     { 0x34, MOXIE_F1_AB,   "umod.l" },
 111     { 0x35, MOXIE_F1_NARG, "brk" },
 112     { 0x36, MOXIE_F1_ABi4, "ldo.b" },
 113     { 0x37, MOXIE_F1_AiB4, "sto.b" },
 114     { 0x38, MOXIE_F1_ABi4, "ldo.s" },
 115     { 0x39, MOXIE_F1_AiB4, "sto.s" },
 116     { 0x3a, MOXIE_F1_NARG, "bad" },
 117     { 0x3b, MOXIE_F1_NARG, "bad" },
 118     { 0x3c, MOXIE_F1_NARG, "bad" },
 119     { 0x3d, MOXIE_F1_NARG, "bad" },
 120     { 0x3e, MOXIE_F1_NARG, "bad" },
 121     { 0x3f, MOXIE_F1_NARG, "bad" }
 122   };
 123
 124 const moxie_opc_info_t moxie_form2_opc_info[4] =
 125   {
 126     { 0x00, MOXIE_F2_A8V,  "inc" },
 127     { 0x01, MOXIE_F2_A8V,  "dec" },
 128     { 0x02, MOXIE_F2_A8V,  "gsr" },
 129     { 0x03, MOXIE_F2_A8V,  "ssr" }
 130   };
 131
 132 const moxie_opc_info_t moxie_form3_opc_info[16] =
 133   {
 134     { 0x00, MOXIE_F3_PCREL,"beq" },
 135     { 0x01, MOXIE_F3_PCREL,"bne" },
 136     { 0x02, MOXIE_F3_PCREL,"blt" },
 137     { 0x03, MOXIE_F3_PCREL,"bgt" },
 138     { 0x04, MOXIE_F3_PCREL,"bltu" },
 139     { 0x05, MOXIE_F3_PCREL,"bgtu" },
 140     { 0x06, MOXIE_F3_PCREL,"bge" },
 141     { 0x07, MOXIE_F3_PCREL,"ble" },
 142     { 0x08, MOXIE_F3_PCREL,"bgeu" },
 143     { 0x09, MOXIE_F3_PCREL,"bleu" },
 144     { 0x0a, MOXIE_F3_NARG, "bad" },
 145     { 0x0b, MOXIE_F3_NARG, "bad" },
 146     { 0x0c, MOXIE_F3_NARG, "bad" },
 147     { 0x0d, MOXIE_F3_NARG, "bad" },
 148     { 0x0e, MOXIE_F3_NARG, "bad" },
 149     { 0x0f, MOXIE_F3_NARG, "bad" }  // Reserved as bad.
 150   };
 151
 152