| 1 | /* OpenRISC opcode support. -*- C -*- |
| 2 | Copyright 2000, 2001, 2003, 2005, 2011 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by Red Hat Inc; |
| 5 | |
| 6 | This file is part of the GNU Binutils. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file is an addendum to or32.cpu. Heavy use of C code isn't |
| 24 | appropriate in .cpu files, so it resides here. This especially applies |
| 25 | to assembly/disassembly where parsing/printing can be quite involved. |
| 26 | Such things aren't really part of the specification of the cpu, per se, |
| 27 | so .cpu files provide the general framework and .opc files handle the |
| 28 | nitty-gritty details as necessary. |
| 29 | |
| 30 | Each section is delimited with start and end markers. |
| 31 | |
| 32 | <arch>-opc.h additions use: "-- opc.h" |
| 33 | <arch>-opc.c additions use: "-- opc.c" |
| 34 | <arch>-asm.c additions use: "-- asm.c" |
| 35 | <arch>-dis.c additions use: "-- dis.c" |
| 36 | <arch>-ibd.h additions use: "-- ibd.h" */ |
| 37 | |
| 38 | /* -- opc.h */ |
| 39 | #undef CGEN_DIS_HASH_SIZE |
| 40 | #define CGEN_DIS_HASH_SIZE 64 |
| 41 | #undef CGEN_DIS_HASH |
| 42 | #define CGEN_DIS_HASH(buffer, value) (((unsigned char *) (buffer))[0] >> 2) |
| 43 | |
| 44 | extern long openrisc_sign_extend_16bit (long); |
| 45 | /* -- */ |
| 46 | |
| 47 | /* -- opc.c */ |
| 48 | /* -- */ |
| 49 | |
| 50 | /* -- asm.c */ |
| 51 | |
| 52 | static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); |
| 53 | |
| 54 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS |
| 55 | |
| 56 | long |
| 57 | openrisc_sign_extend_16bit (long value) |
| 58 | { |
| 59 | return ((value & 0xffff) ^ 0x8000) - 0x8000; |
| 60 | } |
| 61 | |
| 62 | /* Handle hi(). */ |
| 63 | |
| 64 | static const char * |
| 65 | parse_hi16 (CGEN_CPU_DESC cd, const char ** strp, int opindex, long * valuep) |
| 66 | { |
| 67 | const char *errmsg; |
| 68 | enum cgen_parse_operand_result result_type; |
| 69 | unsigned long ret; |
| 70 | |
| 71 | if (**strp == '#') |
| 72 | ++*strp; |
| 73 | |
| 74 | if (strncasecmp (*strp, "hi(", 3) == 0) |
| 75 | { |
| 76 | bfd_vma value; |
| 77 | |
| 78 | *strp += 3; |
| 79 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, |
| 80 | & result_type, & value); |
| 81 | if (**strp != ')') |
| 82 | return MISSING_CLOSING_PARENTHESIS; |
| 83 | |
| 84 | ++*strp; |
| 85 | if (errmsg == NULL |
| 86 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) |
| 87 | value >>= 16; |
| 88 | ret = value; |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | if (**strp == '-') |
| 93 | { |
| 94 | long value; |
| 95 | |
| 96 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); |
| 97 | ret = value; |
| 98 | } |
| 99 | else |
| 100 | { |
| 101 | unsigned long value; |
| 102 | |
| 103 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); |
| 104 | ret = value; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; |
| 109 | return errmsg; |
| 110 | } |
| 111 | |
| 112 | /* Handle lo(). */ |
| 113 | |
| 114 | static const char * |
| 115 | parse_lo16 (CGEN_CPU_DESC cd, const char ** strp, int opindex, long * valuep) |
| 116 | { |
| 117 | const char *errmsg; |
| 118 | enum cgen_parse_operand_result result_type; |
| 119 | unsigned long ret; |
| 120 | |
| 121 | if (**strp == '#') |
| 122 | ++*strp; |
| 123 | |
| 124 | if (strncasecmp (*strp, "lo(", 3) == 0) |
| 125 | { |
| 126 | bfd_vma value; |
| 127 | |
| 128 | *strp += 3; |
| 129 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
| 130 | & result_type, & value); |
| 131 | if (**strp != ')') |
| 132 | return MISSING_CLOSING_PARENTHESIS; |
| 133 | |
| 134 | ++*strp; |
| 135 | ret = value; |
| 136 | } |
| 137 | else |
| 138 | { |
| 139 | if (**strp == '-') |
| 140 | { |
| 141 | long value; |
| 142 | |
| 143 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); |
| 144 | ret = value; |
| 145 | } |
| 146 | else |
| 147 | { |
| 148 | unsigned long value; |
| 149 | |
| 150 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); |
| 151 | ret = value; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; |
| 156 | return errmsg; |
| 157 | } |
| 158 | |
| 159 | /* -- */ |
| 160 | |
| 161 | /* -- ibd.h */ |
| 162 | extern long openrisc_sign_extend_16bit (long); |
| 163 | |
| 164 | /* -- */ |