4 * Copyright (c) 2003-2005 Fabrice Bellard
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.
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.
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/>.
21 #include "qemu/host-utils.h"
23 #include "sysemu/sysemu.h"
25 void helper_raise_exception(CPUSPARCState *env, int tt)
27 env->exception_index = tt;
31 void helper_debug(CPUSPARCState *env)
33 env->exception_index = EXCP_DEBUG;
38 target_ulong helper_popc(target_ulong val)
43 void helper_tick_set_count(void *opaque, uint64_t count)
45 #if !defined(CONFIG_USER_ONLY)
46 cpu_tick_set_count(opaque, count);
50 uint64_t helper_tick_get_count(void *opaque)
52 #if !defined(CONFIG_USER_ONLY)
53 return cpu_tick_get_count(opaque);
59 void helper_tick_set_limit(void *opaque, uint64_t limit)
61 #if !defined(CONFIG_USER_ONLY)
62 cpu_tick_set_limit(opaque, limit);
67 static target_ulong helper_udiv_common(CPUSPARCState *env, target_ulong a,
68 target_ulong b, int cc)
74 x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
75 x1 = (b & 0xffffffff);
78 cpu_restore_state(env, GETPC());
79 helper_raise_exception(env, TT_DIV_ZERO);
83 if (x0 > 0xffffffff) {
90 env->cc_src2 = overflow;
91 env->cc_op = CC_OP_DIV;
96 target_ulong helper_udiv(CPUSPARCState *env, target_ulong a, target_ulong b)
98 return helper_udiv_common(env, a, b, 0);
101 target_ulong helper_udiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
103 return helper_udiv_common(env, a, b, 1);
106 static target_ulong helper_sdiv_common(CPUSPARCState *env, target_ulong a,
107 target_ulong b, int cc)
113 x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
114 x1 = (b & 0xffffffff);
117 cpu_restore_state(env, GETPC());
118 helper_raise_exception(env, TT_DIV_ZERO);
122 if ((int32_t) x0 != x0) {
123 x0 = x0 < 0 ? 0x80000000 : 0x7fffffff;
129 env->cc_src2 = overflow;
130 env->cc_op = CC_OP_DIV;
135 target_ulong helper_sdiv(CPUSPARCState *env, target_ulong a, target_ulong b)
137 return helper_sdiv_common(env, a, b, 0);
140 target_ulong helper_sdiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
142 return helper_sdiv_common(env, a, b, 1);
145 #ifdef TARGET_SPARC64
146 int64_t helper_sdivx(CPUSPARCState *env, int64_t a, int64_t b)
149 /* Raise divide by zero trap. */
150 cpu_restore_state(env, GETPC());
151 helper_raise_exception(env, TT_DIV_ZERO);
152 } else if (b == -1) {
153 /* Avoid overflow trap with i386 divide insn. */
160 uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b)
163 /* Raise divide by zero trap. */
164 cpu_restore_state(env, GETPC());
165 helper_raise_exception(env, TT_DIV_ZERO);
171 target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
176 /* Tag overflow occurs if either input has bits 0 or 1 set. */
177 if ((src1 | src2) & 3) {
183 /* Tag overflow occurs if the addition overflows. */
184 if (~(src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
188 /* Only modify the CC after any exceptions have been generated. */
189 env->cc_op = CC_OP_TADDTV;
196 cpu_restore_state(env, GETPC());
197 helper_raise_exception(env, TT_TOVF);
200 target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
205 /* Tag overflow occurs if either input has bits 0 or 1 set. */
206 if ((src1 | src2) & 3) {
212 /* Tag overflow occurs if the subtraction overflows. */
213 if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
217 /* Only modify the CC after any exceptions have been generated. */
218 env->cc_op = CC_OP_TSUBTV;
225 cpu_restore_state(env, GETPC());
226 helper_raise_exception(env, TT_TOVF);
229 #ifndef TARGET_SPARC64
230 void helper_power_down(CPUSPARCState *env)
233 env->exception_index = EXCP_HLT;
235 env->npc = env->pc + 4;