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/*
* x86 condition code helpers
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
const uint8_t parity_table[256] = {
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
};
#define SHIFT 0
#include "cc_helper_template.h"
#undef SHIFT
#define SHIFT 1
#include "cc_helper_template.h"
#undef SHIFT
#define SHIFT 2
#include "cc_helper_template.h"
#undef SHIFT
#ifdef TARGET_X86_64
#define SHIFT 3
#include "cc_helper_template.h"
#undef SHIFT
#endif
static target_ulong compute_all_adcx(target_ulong dst, target_ulong src1,
target_ulong src2)
{
return (src1 & ~CC_C) | (dst * CC_C);
}
static target_ulong compute_all_adox(target_ulong dst, target_ulong src1,
target_ulong src2)
{
return (src1 & ~CC_O) | (src2 * CC_O);
}
static target_ulong compute_all_adcox(target_ulong dst, target_ulong src1,
target_ulong src2)
{
return (src1 & ~(CC_C | CC_O)) | (dst * CC_C) | (src2 * CC_O);
}
target_ulong helper_cc_compute_all(target_ulong dst, target_ulong src1,
target_ulong src2, int op)
{
switch (op) {
default: /* should never happen */
return 0;
case CC_OP_EFLAGS:
return src1;
case CC_OP_CLR:
return CC_Z | CC_P;
case CC_OP_POPCNT:
return src1 ? 0 : CC_Z;
case CC_OP_MULB:
return compute_all_mulb(dst, src1);
case CC_OP_MULW:
return compute_all_mulw(dst, src1);
case CC_OP_MULL:
return compute_all_mull(dst, src1);
case CC_OP_ADDB:
return compute_all_addb(dst, src1);
case CC_OP_ADDW:
return compute_all_addw(dst, src1);
case CC_OP_ADDL:
return compute_all_addl(dst, src1);
case CC_OP_ADCB:
return compute_all_adcb(dst, src1, src2);
case CC_OP_ADCW:
return compute_all_adcw(dst, src1, src2);
case CC_OP_ADCL:
return compute_all_adcl(dst, src1, src2);
case CC_OP_SUBB:
return compute_all_subb(dst, src1);
case CC_OP_SUBW:
return compute_all_subw(dst, src1);
case CC_OP_SUBL:
return compute_all_subl(dst, src1);
case CC_OP_SBBB:
return compute_all_sbbb(dst, src1, src2);
case CC_OP_SBBW:
return compute_all_sbbw(dst, src1, src2);
case CC_OP_SBBL:
return compute_all_sbbl(dst, src1, src2);
case CC_OP_LOGICB:
return compute_all_logicb(dst, src1);
case CC_OP_LOGICW:
return compute_all_logicw(dst, src1);
case CC_OP_LOGICL:
return compute_all_logicl(dst, src1);
case CC_OP_INCB:
return compute_all_incb(dst, src1);
case CC_OP_INCW:
return compute_all_incw(dst, src1);
case CC_OP_INCL:
return compute_all_incl(dst, src1);
case CC_OP_DECB:
return compute_all_decb(dst, src1);
case CC_OP_DECW:
return compute_all_decw(dst, src1);
case CC_OP_DECL:
return compute_all_decl(dst, src1);
case CC_OP_SHLB:
return compute_all_shlb(dst, src1);
case CC_OP_SHLW:
return compute_all_shlw(dst, src1);
case CC_OP_SHLL:
return compute_all_shll(dst, src1);
case CC_OP_SARB:
return compute_all_sarb(dst, src1);
case CC_OP_SARW:
return compute_all_sarw(dst, src1);
case CC_OP_SARL:
return compute_all_sarl(dst, src1);
case CC_OP_BMILGB:
return compute_all_bmilgb(dst, src1);
case CC_OP_BMILGW:
return compute_all_bmilgw(dst, src1);
case CC_OP_BMILGL:
return compute_all_bmilgl(dst, src1);
case CC_OP_ADCX:
return compute_all_adcx(dst, src1, src2);
case CC_OP_ADOX:
return compute_all_adox(dst, src1, src2);
case CC_OP_ADCOX:
return compute_all_adcox(dst, src1, src2);
#ifdef TARGET_X86_64
case CC_OP_MULQ:
return compute_all_mulq(dst, src1);
case CC_OP_ADDQ:
return compute_all_addq(dst, src1);
case CC_OP_ADCQ:
return compute_all_adcq(dst, src1, src2);
case CC_OP_SUBQ:
return compute_all_subq(dst, src1);
case CC_OP_SBBQ:
return compute_all_sbbq(dst, src1, src2);
case CC_OP_LOGICQ:
return compute_all_logicq(dst, src1);
case CC_OP_INCQ:
return compute_all_incq(dst, src1);
case CC_OP_DECQ:
return compute_all_decq(dst, src1);
case CC_OP_SHLQ:
return compute_all_shlq(dst, src1);
case CC_OP_SARQ:
return compute_all_sarq(dst, src1);
case CC_OP_BMILGQ:
return compute_all_bmilgq(dst, src1);
#endif
}
}
uint32_t cpu_cc_compute_all(CPUX86State *env, int op)
{
return helper_cc_compute_all(CC_DST, CC_SRC, CC_SRC2, op);
}
target_ulong helper_cc_compute_c(target_ulong dst, target_ulong src1,
target_ulong src2, int op)
{
switch (op) {
default: /* should never happen */
case CC_OP_LOGICB:
case CC_OP_LOGICW:
case CC_OP_LOGICL:
case CC_OP_LOGICQ:
case CC_OP_CLR:
case CC_OP_POPCNT:
return 0;
case CC_OP_EFLAGS:
case CC_OP_SARB:
case CC_OP_SARW:
case CC_OP_SARL:
case CC_OP_SARQ:
case CC_OP_ADOX:
return src1 & 1;
case CC_OP_INCB:
case CC_OP_INCW:
case CC_OP_INCL:
case CC_OP_INCQ:
case CC_OP_DECB:
case CC_OP_DECW:
case CC_OP_DECL:
case CC_OP_DECQ:
return src1;
case CC_OP_MULB:
case CC_OP_MULW:
case CC_OP_MULL:
case CC_OP_MULQ:
return src1 != 0;
case CC_OP_ADCX:
case CC_OP_ADCOX:
return dst;
case CC_OP_ADDB:
return compute_c_addb(dst, src1);
case CC_OP_ADDW:
return compute_c_addw(dst, src1);
case CC_OP_ADDL:
return compute_c_addl(dst, src1);
case CC_OP_ADCB:
return compute_c_adcb(dst, src1, src2);
case CC_OP_ADCW:
return compute_c_adcw(dst, src1, src2);
case CC_OP_ADCL:
return compute_c_adcl(dst, src1, src2);
case CC_OP_SUBB:
return compute_c_subb(dst, src1);
case CC_OP_SUBW:
return compute_c_subw(dst, src1);
case CC_OP_SUBL:
return compute_c_subl(dst, src1);
case CC_OP_SBBB:
return compute_c_sbbb(dst, src1, src2);
case CC_OP_SBBW:
return compute_c_sbbw(dst, src1, src2);
case CC_OP_SBBL:
return compute_c_sbbl(dst, src1, src2);
case CC_OP_SHLB:
return compute_c_shlb(dst, src1);
case CC_OP_SHLW:
return compute_c_shlw(dst, src1);
case CC_OP_SHLL:
return compute_c_shll(dst, src1);
case CC_OP_BMILGB:
return compute_c_bmilgb(dst, src1);
case CC_OP_BMILGW:
return compute_c_bmilgw(dst, src1);
case CC_OP_BMILGL:
return compute_c_bmilgl(dst, src1);
#ifdef TARGET_X86_64
case CC_OP_ADDQ:
return compute_c_addq(dst, src1);
case CC_OP_ADCQ:
return compute_c_adcq(dst, src1, src2);
case CC_OP_SUBQ:
return compute_c_subq(dst, src1);
case CC_OP_SBBQ:
return compute_c_sbbq(dst, src1, src2);
case CC_OP_SHLQ:
return compute_c_shlq(dst, src1);
case CC_OP_BMILGQ:
return compute_c_bmilgq(dst, src1);
#endif
}
}
void helper_write_eflags(CPUX86State *env, target_ulong t0,
uint32_t update_mask)
{
cpu_load_eflags(env, t0, update_mask);
}
target_ulong helper_read_eflags(CPUX86State *env)
{
uint32_t eflags;
eflags = cpu_cc_compute_all(env, CC_OP);
eflags |= (env->df & DF_MASK);
eflags |= env->eflags & ~(VM_MASK | RF_MASK);
return eflags;
}
void helper_clts(CPUX86State *env)
{
env->cr[0] &= ~CR0_TS_MASK;
env->hflags &= ~HF_TS_MASK;
}
void helper_reset_rf(CPUX86State *env)
{
env->eflags &= ~RF_MASK;
}
void helper_cli(CPUX86State *env)
{
env->eflags &= ~IF_MASK;
}
void helper_sti(CPUX86State *env)
{
env->eflags |= IF_MASK;
}
void helper_clac(CPUX86State *env)
{
env->eflags &= ~AC_MASK;
}
void helper_stac(CPUX86State *env)
{
env->eflags |= AC_MASK;
}
#if 0
/* vm86plus instructions */
void helper_cli_vm(CPUX86State *env)
{
env->eflags &= ~VIF_MASK;
}
void helper_sti_vm(CPUX86State *env)
{
env->eflags |= VIF_MASK;
if (env->eflags & VIP_MASK) {
raise_exception_ra(env, EXCP0D_GPF, GETPC());
}
}
#endif
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