bellard | e8af50a | 2004-09-30 21:55:55 +0000 | [diff] [blame] | 1 | /* |
Blue Swirl | 163fa5c | 2011-09-11 11:30:01 +0000 | [diff] [blame] | 2 | * Misc Sparc helpers |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | 8346901 | 2005-07-23 14:27:54 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003-2005 Fabrice Bellard |
bellard | e8af50a | 2004-09-30 21:55:55 +0000 | [diff] [blame] | 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 |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
bellard | e8af50a | 2004-09-30 21:55:55 +0000 | [diff] [blame] | 18 | */ |
bellard | ee5bbe3 | 2005-07-04 22:18:23 +0000 | [diff] [blame] | 19 | |
| 20 | #include "cpu.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 21 | #include "qemu/host-utils.h" |
Blue Swirl | 2336c1f | 2011-07-03 07:05:50 +0000 | [diff] [blame] | 22 | #include "helper.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 23 | #include "sysemu/sysemu.h" |
bellard | e8af50a | 2004-09-30 21:55:55 +0000 | [diff] [blame] | 24 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 25 | void helper_raise_exception(CPUSPARCState *env, int tt) |
Blue Swirl | bc26531 | 2011-07-03 08:19:42 +0000 | [diff] [blame] | 26 | { |
Andreas Färber | 2710342 | 2013-08-26 08:31:06 +0200 | [diff] [blame] | 27 | CPUState *cs = CPU(sparc_env_get_cpu(env)); |
| 28 | |
| 29 | cs->exception_index = tt; |
Andreas Färber | 5638d18 | 2013-08-27 17:52:12 +0200 | [diff] [blame] | 30 | cpu_loop_exit(cs); |
Blue Swirl | bc26531 | 2011-07-03 08:19:42 +0000 | [diff] [blame] | 31 | } |
| 32 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 33 | void helper_debug(CPUSPARCState *env) |
Blue Swirl | bc26531 | 2011-07-03 08:19:42 +0000 | [diff] [blame] | 34 | { |
Andreas Färber | 2710342 | 2013-08-26 08:31:06 +0200 | [diff] [blame] | 35 | CPUState *cs = CPU(sparc_env_get_cpu(env)); |
| 36 | |
| 37 | cs->exception_index = EXCP_DEBUG; |
Andreas Färber | 5638d18 | 2013-08-27 17:52:12 +0200 | [diff] [blame] | 38 | cpu_loop_exit(cs); |
Blue Swirl | bc26531 | 2011-07-03 08:19:42 +0000 | [diff] [blame] | 39 | } |
| 40 | |
Blue Swirl | 2336c1f | 2011-07-03 07:05:50 +0000 | [diff] [blame] | 41 | #ifdef TARGET_SPARC64 |
| 42 | target_ulong helper_popc(target_ulong val) |
| 43 | { |
| 44 | return ctpop64(val); |
| 45 | } |
| 46 | |
| 47 | void helper_tick_set_count(void *opaque, uint64_t count) |
| 48 | { |
| 49 | #if !defined(CONFIG_USER_ONLY) |
| 50 | cpu_tick_set_count(opaque, count); |
| 51 | #endif |
| 52 | } |
| 53 | |
| 54 | uint64_t helper_tick_get_count(void *opaque) |
| 55 | { |
| 56 | #if !defined(CONFIG_USER_ONLY) |
| 57 | return cpu_tick_get_count(opaque); |
| 58 | #else |
| 59 | return 0; |
| 60 | #endif |
| 61 | } |
| 62 | |
| 63 | void helper_tick_set_limit(void *opaque, uint64_t limit) |
| 64 | { |
| 65 | #if !defined(CONFIG_USER_ONLY) |
| 66 | cpu_tick_set_limit(opaque, limit); |
| 67 | #endif |
| 68 | } |
| 69 | #endif |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 70 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 71 | static target_ulong helper_udiv_common(CPUSPARCState *env, target_ulong a, |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 72 | target_ulong b, int cc) |
| 73 | { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 74 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 75 | int overflow = 0; |
| 76 | uint64_t x0; |
| 77 | uint32_t x1; |
| 78 | |
| 79 | x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32); |
| 80 | x1 = (b & 0xffffffff); |
| 81 | |
| 82 | if (x1 == 0) { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 83 | cpu_restore_state(CPU(cpu), GETPC()); |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 84 | helper_raise_exception(env, TT_DIV_ZERO); |
| 85 | } |
| 86 | |
| 87 | x0 = x0 / x1; |
Olivier Danet | 6a5b69a | 2014-03-21 02:25:19 +0100 | [diff] [blame] | 88 | if (x0 > UINT32_MAX) { |
| 89 | x0 = UINT32_MAX; |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 90 | overflow = 1; |
| 91 | } |
| 92 | |
| 93 | if (cc) { |
| 94 | env->cc_dst = x0; |
| 95 | env->cc_src2 = overflow; |
| 96 | env->cc_op = CC_OP_DIV; |
| 97 | } |
| 98 | return x0; |
| 99 | } |
| 100 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 101 | target_ulong helper_udiv(CPUSPARCState *env, target_ulong a, target_ulong b) |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 102 | { |
| 103 | return helper_udiv_common(env, a, b, 0); |
| 104 | } |
| 105 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 106 | target_ulong helper_udiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b) |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 107 | { |
| 108 | return helper_udiv_common(env, a, b, 1); |
| 109 | } |
| 110 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 111 | static target_ulong helper_sdiv_common(CPUSPARCState *env, target_ulong a, |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 112 | target_ulong b, int cc) |
| 113 | { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 114 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 115 | int overflow = 0; |
| 116 | int64_t x0; |
| 117 | int32_t x1; |
| 118 | |
| 119 | x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32); |
| 120 | x1 = (b & 0xffffffff); |
| 121 | |
| 122 | if (x1 == 0) { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 123 | cpu_restore_state(CPU(cpu), GETPC()); |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 124 | helper_raise_exception(env, TT_DIV_ZERO); |
Olivier Danet | 6a5b69a | 2014-03-21 02:25:19 +0100 | [diff] [blame] | 125 | } else if (x1 == -1 && x0 == INT64_MIN) { |
| 126 | x0 = INT32_MAX; |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 127 | overflow = 1; |
Olivier Danet | 6a5b69a | 2014-03-21 02:25:19 +0100 | [diff] [blame] | 128 | } else { |
| 129 | x0 = x0 / x1; |
| 130 | if ((int32_t) x0 != x0) { |
| 131 | x0 = x0 < 0 ? INT32_MIN : INT32_MAX; |
| 132 | overflow = 1; |
| 133 | } |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | if (cc) { |
| 137 | env->cc_dst = x0; |
| 138 | env->cc_src2 = overflow; |
| 139 | env->cc_op = CC_OP_DIV; |
| 140 | } |
| 141 | return x0; |
| 142 | } |
| 143 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 144 | target_ulong helper_sdiv(CPUSPARCState *env, target_ulong a, target_ulong b) |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 145 | { |
| 146 | return helper_sdiv_common(env, a, b, 0); |
| 147 | } |
| 148 | |
Andreas Färber | c5f9864 | 2012-03-14 01:38:22 +0100 | [diff] [blame] | 149 | target_ulong helper_sdiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b) |
Blue Swirl | 7a5e448 | 2011-07-04 18:15:42 +0000 | [diff] [blame] | 150 | { |
| 151 | return helper_sdiv_common(env, a, b, 1); |
| 152 | } |
Richard Henderson | c28ae41 | 2012-10-05 16:55:03 -0700 | [diff] [blame] | 153 | |
| 154 | #ifdef TARGET_SPARC64 |
| 155 | int64_t helper_sdivx(CPUSPARCState *env, int64_t a, int64_t b) |
| 156 | { |
| 157 | if (b == 0) { |
| 158 | /* Raise divide by zero trap. */ |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 159 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
| 160 | |
| 161 | cpu_restore_state(CPU(cpu), GETPC()); |
Richard Henderson | c28ae41 | 2012-10-05 16:55:03 -0700 | [diff] [blame] | 162 | helper_raise_exception(env, TT_DIV_ZERO); |
| 163 | } else if (b == -1) { |
| 164 | /* Avoid overflow trap with i386 divide insn. */ |
| 165 | return -a; |
| 166 | } else { |
| 167 | return a / b; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b) |
| 172 | { |
| 173 | if (b == 0) { |
| 174 | /* Raise divide by zero trap. */ |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 175 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
| 176 | |
| 177 | cpu_restore_state(CPU(cpu), GETPC()); |
Richard Henderson | c28ae41 | 2012-10-05 16:55:03 -0700 | [diff] [blame] | 178 | helper_raise_exception(env, TT_DIV_ZERO); |
| 179 | } |
| 180 | return a / b; |
| 181 | } |
| 182 | #endif |
Richard Henderson | a2ea4aa | 2012-10-05 16:55:05 -0700 | [diff] [blame] | 183 | |
| 184 | target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1, |
| 185 | target_ulong src2) |
| 186 | { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 187 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
Richard Henderson | a2ea4aa | 2012-10-05 16:55:05 -0700 | [diff] [blame] | 188 | target_ulong dst; |
| 189 | |
| 190 | /* Tag overflow occurs if either input has bits 0 or 1 set. */ |
| 191 | if ((src1 | src2) & 3) { |
| 192 | goto tag_overflow; |
| 193 | } |
| 194 | |
| 195 | dst = src1 + src2; |
| 196 | |
| 197 | /* Tag overflow occurs if the addition overflows. */ |
| 198 | if (~(src1 ^ src2) & (src1 ^ dst) & (1u << 31)) { |
| 199 | goto tag_overflow; |
| 200 | } |
| 201 | |
| 202 | /* Only modify the CC after any exceptions have been generated. */ |
| 203 | env->cc_op = CC_OP_TADDTV; |
| 204 | env->cc_src = src1; |
| 205 | env->cc_src2 = src2; |
| 206 | env->cc_dst = dst; |
| 207 | return dst; |
| 208 | |
| 209 | tag_overflow: |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 210 | cpu_restore_state(CPU(cpu), GETPC()); |
Richard Henderson | a2ea4aa | 2012-10-05 16:55:05 -0700 | [diff] [blame] | 211 | helper_raise_exception(env, TT_TOVF); |
| 212 | } |
| 213 | |
| 214 | target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1, |
| 215 | target_ulong src2) |
| 216 | { |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 217 | SPARCCPU *cpu = sparc_env_get_cpu(env); |
Richard Henderson | a2ea4aa | 2012-10-05 16:55:05 -0700 | [diff] [blame] | 218 | target_ulong dst; |
| 219 | |
| 220 | /* Tag overflow occurs if either input has bits 0 or 1 set. */ |
| 221 | if ((src1 | src2) & 3) { |
| 222 | goto tag_overflow; |
| 223 | } |
| 224 | |
| 225 | dst = src1 - src2; |
| 226 | |
| 227 | /* Tag overflow occurs if the subtraction overflows. */ |
| 228 | if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) { |
| 229 | goto tag_overflow; |
| 230 | } |
| 231 | |
| 232 | /* Only modify the CC after any exceptions have been generated. */ |
| 233 | env->cc_op = CC_OP_TSUBTV; |
| 234 | env->cc_src = src1; |
| 235 | env->cc_src2 = src2; |
| 236 | env->cc_dst = dst; |
| 237 | return dst; |
| 238 | |
| 239 | tag_overflow: |
Andreas Färber | 3f38f30 | 2013-09-01 16:51:34 +0200 | [diff] [blame] | 240 | cpu_restore_state(CPU(cpu), GETPC()); |
Richard Henderson | a2ea4aa | 2012-10-05 16:55:05 -0700 | [diff] [blame] | 241 | helper_raise_exception(env, TT_TOVF); |
| 242 | } |
Ronald Hecht | d1c36ba | 2013-02-19 12:45:07 +0100 | [diff] [blame] | 243 | |
| 244 | #ifndef TARGET_SPARC64 |
| 245 | void helper_power_down(CPUSPARCState *env) |
| 246 | { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 247 | CPUState *cs = CPU(sparc_env_get_cpu(env)); |
| 248 | |
| 249 | cs->halted = 1; |
Andreas Färber | 2710342 | 2013-08-26 08:31:06 +0200 | [diff] [blame] | 250 | cs->exception_index = EXCP_HLT; |
Ronald Hecht | d1c36ba | 2013-02-19 12:45:07 +0100 | [diff] [blame] | 251 | env->pc = env->npc; |
| 252 | env->npc = env->pc + 4; |
Andreas Färber | 5638d18 | 2013-08-27 17:52:12 +0200 | [diff] [blame] | 253 | cpu_loop_exit(cs); |
Ronald Hecht | d1c36ba | 2013-02-19 12:45:07 +0100 | [diff] [blame] | 254 | } |
| 255 | #endif |