/* * 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_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: 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