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