Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * x86 shift helpers |
| 3 | * |
| 4 | * Copyright (c) 2008 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library 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 GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #define DATA_BITS (1 << (3 + SHIFT)) |
| 21 | #define SHIFT_MASK (DATA_BITS - 1) |
| 22 | #if DATA_BITS <= 32 |
| 23 | #define SHIFT1_MASK 0x1f |
| 24 | #else |
| 25 | #define SHIFT1_MASK 0x3f |
| 26 | #endif |
| 27 | |
| 28 | #if DATA_BITS == 8 |
| 29 | #define SUFFIX b |
| 30 | #define DATA_MASK 0xff |
| 31 | #elif DATA_BITS == 16 |
| 32 | #define SUFFIX w |
| 33 | #define DATA_MASK 0xffff |
| 34 | #elif DATA_BITS == 32 |
| 35 | #define SUFFIX l |
| 36 | #define DATA_MASK 0xffffffff |
| 37 | #elif DATA_BITS == 64 |
| 38 | #define SUFFIX q |
| 39 | #define DATA_MASK 0xffffffffffffffffULL |
| 40 | #else |
| 41 | #error unhandled operand size |
| 42 | #endif |
| 43 | |
Blue Swirl | 7923057 | 2012-04-29 14:11:56 +0000 | [diff] [blame] | 44 | target_ulong glue(helper_rcl, SUFFIX)(CPUX86State *env, target_ulong t0, |
| 45 | target_ulong t1) |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 46 | { |
| 47 | int count, eflags; |
| 48 | target_ulong src; |
| 49 | target_long res; |
| 50 | |
| 51 | count = t1 & SHIFT1_MASK; |
| 52 | #if DATA_BITS == 16 |
| 53 | count = rclw_table[count]; |
| 54 | #elif DATA_BITS == 8 |
| 55 | count = rclb_table[count]; |
| 56 | #endif |
| 57 | if (count) { |
Paolo Bonzini | f5847c9 | 2012-10-06 00:18:55 +0200 | [diff] [blame] | 58 | eflags = env->cc_src; |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 59 | t0 &= DATA_MASK; |
| 60 | src = t0; |
| 61 | res = (t0 << count) | ((target_ulong)(eflags & CC_C) << (count - 1)); |
| 62 | if (count > 1) { |
| 63 | res |= t0 >> (DATA_BITS + 1 - count); |
| 64 | } |
| 65 | t0 = res; |
Paolo Bonzini | f5847c9 | 2012-10-06 00:18:55 +0200 | [diff] [blame] | 66 | env->cc_src = (eflags & ~(CC_C | CC_O)) | |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 67 | (lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
| 68 | ((src >> (DATA_BITS - count)) & CC_C); |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 69 | } |
| 70 | return t0; |
| 71 | } |
| 72 | |
Blue Swirl | 7923057 | 2012-04-29 14:11:56 +0000 | [diff] [blame] | 73 | target_ulong glue(helper_rcr, SUFFIX)(CPUX86State *env, target_ulong t0, |
| 74 | target_ulong t1) |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 75 | { |
| 76 | int count, eflags; |
| 77 | target_ulong src; |
| 78 | target_long res; |
| 79 | |
| 80 | count = t1 & SHIFT1_MASK; |
| 81 | #if DATA_BITS == 16 |
| 82 | count = rclw_table[count]; |
| 83 | #elif DATA_BITS == 8 |
| 84 | count = rclb_table[count]; |
| 85 | #endif |
| 86 | if (count) { |
Paolo Bonzini | f5847c9 | 2012-10-06 00:18:55 +0200 | [diff] [blame] | 87 | eflags = env->cc_src; |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 88 | t0 &= DATA_MASK; |
| 89 | src = t0; |
| 90 | res = (t0 >> count) | |
| 91 | ((target_ulong)(eflags & CC_C) << (DATA_BITS - count)); |
| 92 | if (count > 1) { |
| 93 | res |= t0 << (DATA_BITS + 1 - count); |
| 94 | } |
| 95 | t0 = res; |
Paolo Bonzini | f5847c9 | 2012-10-06 00:18:55 +0200 | [diff] [blame] | 96 | env->cc_src = (eflags & ~(CC_C | CC_O)) | |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 97 | (lshift(src ^ t0, 11 - (DATA_BITS - 1)) & CC_O) | |
| 98 | ((src >> (count - 1)) & CC_C); |
Blue Swirl | 38de4c4 | 2012-05-12 20:39:26 +0000 | [diff] [blame] | 99 | } |
| 100 | return t0; |
| 101 | } |
| 102 | |
| 103 | #undef DATA_BITS |
| 104 | #undef SHIFT_MASK |
| 105 | #undef SHIFT1_MASK |
| 106 | #undef DATA_TYPE |
| 107 | #undef DATA_MASK |
| 108 | #undef SUFFIX |