| 1 | /* The common simulator framework for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright 2002-2021 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Andrew Cagney and Red Hat. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | |
| 23 | #ifndef N |
| 24 | #error "N must be #defined" |
| 25 | #endif |
| 26 | |
| 27 | #include "symcat.h" |
| 28 | |
| 29 | #if defined(__STDC__) && defined(signed) |
| 30 | /* If signed were defined to be say __signed (ie, some versions of Linux), |
| 31 | then the signedN macro would not work correctly. If we have a standard |
| 32 | compiler, we have signed. */ |
| 33 | #undef signed |
| 34 | #endif |
| 35 | |
| 36 | /* NOTE: See end of file for #undef */ |
| 37 | #define unsignedN XCONCAT2(unsigned,N) |
| 38 | #define signedN XCONCAT2(signed,N) |
| 39 | #define LSMASKn XCONCAT2(LSMASK,N) |
| 40 | #define MSMASKn XCONCAT2(MSMASK,N) |
| 41 | #define LSMASKEDn XCONCAT2(LSMASKED,N) |
| 42 | #define MSMASKEDn XCONCAT2(MSMASKED,N) |
| 43 | #define LSEXTRACTEDn XCONCAT2(LSEXTRACTED,N) |
| 44 | #define MSEXTRACTEDn XCONCAT2(MSEXTRACTED,N) |
| 45 | #define LSINSERTEDn XCONCAT2(LSINSERTED,N) |
| 46 | #define MSINSERTEDn XCONCAT2(MSINSERTED,N) |
| 47 | #define ROTn XCONCAT2(ROT,N) |
| 48 | #define ROTLn XCONCAT2(ROTL,N) |
| 49 | #define ROTRn XCONCAT2(ROTR,N) |
| 50 | #define MSSEXTn XCONCAT2(MSSEXT,N) |
| 51 | #define LSSEXTn XCONCAT2(LSSEXT,N) |
| 52 | |
| 53 | /* TAGS: LSMASKED16 LSMASKED32 LSMASKED64 */ |
| 54 | |
| 55 | INLINE_SIM_BITS\ |
| 56 | (unsignedN) |
| 57 | LSMASKEDn (unsignedN word, |
| 58 | int start, |
| 59 | int stop) |
| 60 | { |
| 61 | word &= LSMASKn (start, stop); |
| 62 | return word; |
| 63 | } |
| 64 | |
| 65 | /* TAGS: MSMASKED16 MSMASKED32 MSMASKED64 */ |
| 66 | |
| 67 | INLINE_SIM_BITS\ |
| 68 | (unsignedN) |
| 69 | MSMASKEDn (unsignedN word, |
| 70 | int start, |
| 71 | int stop) |
| 72 | { |
| 73 | word &= MSMASKn (start, stop); |
| 74 | return word; |
| 75 | } |
| 76 | |
| 77 | /* TAGS: LSEXTRACTED16 LSEXTRACTED32 LSEXTRACTED64 */ |
| 78 | |
| 79 | INLINE_SIM_BITS\ |
| 80 | (unsignedN) |
| 81 | LSEXTRACTEDn (unsignedN val, |
| 82 | int start, |
| 83 | int stop) |
| 84 | { |
| 85 | val <<= (N - 1 - start); /* drop high bits */ |
| 86 | val >>= (N - 1 - start) + (stop); /* drop low bits */ |
| 87 | return val; |
| 88 | } |
| 89 | |
| 90 | /* TAGS: MSEXTRACTED16 MSEXTRACTED32 MSEXTRACTED64 */ |
| 91 | |
| 92 | INLINE_SIM_BITS\ |
| 93 | (unsignedN) |
| 94 | MSEXTRACTEDn (unsignedN val, |
| 95 | int start, |
| 96 | int stop) |
| 97 | { |
| 98 | val <<= (start); /* drop high bits */ |
| 99 | val >>= (start) + (N - 1 - stop); /* drop low bits */ |
| 100 | return val; |
| 101 | } |
| 102 | |
| 103 | /* TAGS: LSINSERTED16 LSINSERTED32 LSINSERTED64 */ |
| 104 | |
| 105 | INLINE_SIM_BITS\ |
| 106 | (unsignedN) |
| 107 | LSINSERTEDn (unsignedN val, |
| 108 | int start, |
| 109 | int stop) |
| 110 | { |
| 111 | val <<= stop; |
| 112 | val &= LSMASKn (start, stop); |
| 113 | return val; |
| 114 | } |
| 115 | |
| 116 | /* TAGS: MSINSERTED16 MSINSERTED32 MSINSERTED64 */ |
| 117 | |
| 118 | INLINE_SIM_BITS\ |
| 119 | (unsignedN) |
| 120 | MSINSERTEDn (unsignedN val, |
| 121 | int start, |
| 122 | int stop) |
| 123 | { |
| 124 | val <<= ((N - 1) - stop); |
| 125 | val &= MSMASKn (start, stop); |
| 126 | return val; |
| 127 | } |
| 128 | |
| 129 | /* TAGS: ROT16 ROT32 ROT64 */ |
| 130 | |
| 131 | INLINE_SIM_BITS\ |
| 132 | (unsignedN) |
| 133 | ROTn (unsignedN val, |
| 134 | int shift) |
| 135 | { |
| 136 | if (shift > 0) |
| 137 | return ROTRn (val, shift); |
| 138 | else if (shift < 0) |
| 139 | return ROTLn (val, -shift); |
| 140 | else |
| 141 | return val; |
| 142 | } |
| 143 | |
| 144 | /* TAGS: ROTL16 ROTL32 ROTL64 */ |
| 145 | |
| 146 | INLINE_SIM_BITS\ |
| 147 | (unsignedN) |
| 148 | ROTLn (unsignedN val, |
| 149 | int shift) |
| 150 | { |
| 151 | unsignedN result; |
| 152 | ASSERT (shift <= N); |
| 153 | result = (((val) << (shift)) | ((val) >> ((N)-(shift)))); |
| 154 | return result; |
| 155 | } |
| 156 | |
| 157 | /* TAGS: ROTR16 ROTR32 ROTR64 */ |
| 158 | |
| 159 | INLINE_SIM_BITS\ |
| 160 | (unsignedN) |
| 161 | ROTRn (unsignedN val, |
| 162 | int shift) |
| 163 | { |
| 164 | unsignedN result; |
| 165 | ASSERT (shift <= N); |
| 166 | result = (((val) >> (shift)) | ((val) << ((N)-(shift)))); |
| 167 | return result; |
| 168 | } |
| 169 | |
| 170 | /* TAGS: LSSEXT16 LSSEXT32 LSSEXT64 */ |
| 171 | |
| 172 | INLINE_SIM_BITS\ |
| 173 | (unsignedN) |
| 174 | LSSEXTn (signedN val, |
| 175 | int sign_bit) |
| 176 | { |
| 177 | int shift; |
| 178 | /* make the sign-bit most significant and then smear it back into |
| 179 | position */ |
| 180 | ASSERT (sign_bit < N); |
| 181 | shift = ((N - 1) - sign_bit); |
| 182 | val <<= shift; |
| 183 | val >>= shift; |
| 184 | return val; |
| 185 | } |
| 186 | |
| 187 | /* TAGS: MSSEXT16 MSSEXT32 MSSEXT64 */ |
| 188 | |
| 189 | INLINE_SIM_BITS\ |
| 190 | (unsignedN) |
| 191 | MSSEXTn (signedN val, |
| 192 | int sign_bit) |
| 193 | { |
| 194 | /* make the sign-bit most significant and then smear it back into |
| 195 | position */ |
| 196 | ASSERT (sign_bit < N); |
| 197 | val <<= sign_bit; |
| 198 | val >>= sign_bit; |
| 199 | return val; |
| 200 | } |
| 201 | |
| 202 | |
| 203 | /* NOTE: See start of file for #define */ |
| 204 | #undef LSSEXTn |
| 205 | #undef MSSEXTn |
| 206 | #undef ROTLn |
| 207 | #undef ROTRn |
| 208 | #undef ROTn |
| 209 | #undef LSINSERTEDn |
| 210 | #undef MSINSERTEDn |
| 211 | #undef LSEXTRACTEDn |
| 212 | #undef MSEXTRACTEDn |
| 213 | #undef LSMASKEDn |
| 214 | #undef LSMASKn |
| 215 | #undef MSMASKEDn |
| 216 | #undef MSMASKn |
| 217 | #undef signedN |
| 218 | #undef unsignedN |