projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| b3e426bc AC |
1 | /* This file is part of the program psim. |
| 2 | ||
| 3 | Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> | |
| 4 | Copyright (C) 1997, Free Software Foundation, Inc. | |
| 5 | ||
| 6 | This program is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2 of the License, or | |
| 9 | (at your option) any later version. | |
| 10 | ||
| 11 | This program is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with this program; if not, write to the Free Software | |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | ||
| 20 | */ | |
| 21 | ||
| 22 | ||
| 23 | #ifndef N | |
| 24 | #error "N must be #defined" | |
| 25 | #endif | |
| 26 | ||
| 27 | /* NOTE: See end of file for #undef */ | |
| 28 | #define unsignedN XCONCAT2(unsigned,N) | |
| 29 | #define signedN XCONCAT2(signed,N) | |
| 30 | #define MASKEDn XCONCAT2(MASKED,N) | |
| 31 | #define MASKn XCONCAT2(MASK,N) | |
| 32 | #define LSMASKEDn XCONCAT2(LSMASKED,N) | |
| 33 | #define EXTRACTEDn XCONCAT2(EXTRACTED,N) | |
| 34 | #define INSERTEDn XCONCAT2(INSERTED,N) | |
| 35 | #define ROTn XCONCAT2(ROT,N) | |
| 36 | #define ROTLn XCONCAT2(ROTL,N) | |
| 37 | #define ROTRn XCONCAT2(ROTR,N) | |
| 38 | #define SEXTn XCONCAT2(SEXT,N) | |
| 39 | ||
| 40 | ||
| 41 | INLINE_SIM_BITS\ | |
| 42 | (unsignedN) | |
| 43 | MASKEDn(unsignedN word, | |
| 44 | unsigned start, | |
| 45 | unsigned stop) | |
| 46 | { | |
| 47 | return (word & MASKn(start, stop)); | |
| 48 | } | |
| 49 | ||
| 50 | ||
| 51 | INLINE_SIM_BITS\ | |
| 52 | (unsignedN) | |
| 53 | LSMASKEDn(unsignedN word, | |
| 54 | unsigned nr_bits) | |
| 55 | { | |
| 56 | return (word & MASKn(N - nr_bits, N - 1)); | |
| 57 | } | |
| 58 | ||
| 59 | ||
| 60 | INLINE_SIM_BITS\ | |
| 61 | (unsignedN) | |
| 62 | EXTRACTEDn(unsignedN val, | |
| 63 | unsigned start, | |
| 64 | unsigned stop) | |
| 65 | { | |
| 66 | return LSMASKEDn((((unsignedN)(val)) >> (N - stop - 1)), | |
| 67 | stop - start + 1); | |
| 68 | } | |
| 69 | ||
| 70 | ||
| 71 | INLINE_SIM_BITS\ | |
| 72 | (unsignedN) | |
| 73 | INSERTEDn(unsignedN val, | |
| 74 | unsigned start, | |
| 75 | unsigned stop) | |
| 76 | { | |
| 77 | return (((unsignedN)(val) | |
| 78 | << _MAKE_SHIFT(N, stop)) | |
| 79 | & MASKn(start, stop)); | |
| 80 | } | |
| 81 | ||
| 82 | ||
| 83 | INLINE_SIM_BITS\ | |
| 84 | (unsignedN) | |
| 85 | ROTn(unsignedN val, | |
| 86 | int shift) | |
| 87 | { | |
| 88 | unsignedN result; | |
| 89 | if (shift > 0) | |
| 90 | return ROTRn(val, shift); | |
| 91 | else if (shift < 0) | |
| 92 | return ROTLn(val, -shift); | |
| 93 | else | |
| 94 | return val; | |
| 95 | } | |
| 96 | ||
| 97 | ||
| 98 | INLINE_SIM_BITS\ | |
| 99 | (unsignedN) | |
| 100 | ROTLn(unsignedN val, | |
| 101 | unsigned shift) | |
| 102 | { | |
| 103 | unsignedN result; | |
| 104 | ASSERT(shift <= N); | |
| 105 | result = (((val) << (shift)) | ((val) >> ((N)-(shift)))); | |
| 106 | return result; | |
| 107 | } | |
| 108 | ||
| 109 | ||
| 110 | INLINE_SIM_BITS\ | |
| 111 | (unsignedN) | |
| 112 | ROTRn(unsignedN val, | |
| 113 | unsigned shift) | |
| 114 | { | |
| 115 | unsignedN result; | |
| 116 | ASSERT(shift <= N); | |
| 117 | result = (((val) >> (shift)) | ((val) << ((N)-(shift)))); | |
| 118 | return result; | |
| 119 | } | |
| 120 | ||
| 121 | ||
| 122 | INLINE_SIM_BITS\ | |
| 123 | (unsignedN) | |
| 124 | SEXTn(signedN val, | |
| 125 | unsigned sign_bit) | |
| 126 | { | |
| 127 | /* make the sign-bit most significant and then smear it back into | |
| 128 | position */ | |
| 129 | ASSERT(sign_bit < N); | |
| 130 | return (val << sign_bit) >> sign_bit; | |
| 131 | } | |
| 132 | ||
| 133 | ||
| 134 | /* NOTE: See start of file for #define */ | |
| 135 | #undef SEXTn | |
| 136 | #undef ROTLn | |
| 137 | #undef ROTRn | |
| 138 | #undef ROTn | |
| 139 | #undef INSERTEDn | |
| 140 | #undef EXTRACTEDn | |
| 141 | #undef LSMASKEDn | |
| 142 | #undef MASKn | |
| 143 | #undef MASKEDn | |
| 144 | #undef signedN | |
| 145 | #undef unsignedN |