void helper_cmpxchg8b_unlocked(CPUX86State *env, target_ulong a0) { uintptr_t ra = GETPC(); uint64_t oldv, cmpv, newv; int eflags; eflags = cpu_cc_compute_all(env, CC_OP); cmpv = deposit64(env->regs[R_EAX], 32, 32, env->regs[R_EDX]); newv = deposit64(env->regs[R_EBX], 32, 32, env->regs[R_ECX]); oldv = cpu_ldq_data_ra(env, a0, ra); newv = (cmpv == oldv ? newv : oldv); /* always do the store */ cpu_stq_data_ra(env, a0, newv, ra); if (oldv == cmpv) { eflags |= CC_Z; } else { env->regs[R_EAX] = (uint32_t)oldv; env->regs[R_EDX] = (uint32_t)(oldv >> 32); eflags &= ~CC_Z; } CC_SRC = eflags; }
uint64_t helper_bndldx64(CPUX86State *env, target_ulong base, target_ulong ptr) { uintptr_t ra = GETPC(); uint64_t bte, lb, ub, pt; bte = lookup_bte64(env, base, ra); lb = cpu_ldq_data_ra(env, bte, ra); ub = cpu_ldq_data_ra(env, bte + 8, ra); pt = cpu_ldq_data_ra(env, bte + 16, ra); if (pt != ptr) { lb = ub = 0; } env->mmx_t0.MMX_Q(0) = ub; return lb; }
void helper_cmpxchg16b_unlocked(CPUX86State *env, target_ulong a0) { uintptr_t ra = GETPC(); Int128 oldv, cmpv, newv; uint64_t o0, o1; int eflags; bool success; if ((a0 & 0xf) != 0) { raise_exception_ra(env, EXCP0D_GPF, GETPC()); } eflags = cpu_cc_compute_all(env, CC_OP); cmpv = int128_make128(env->regs[R_EAX], env->regs[R_EDX]); newv = int128_make128(env->regs[R_EBX], env->regs[R_ECX]); o0 = cpu_ldq_data_ra(env, a0 + 0, ra); o1 = cpu_ldq_data_ra(env, a0 + 8, ra); oldv = int128_make128(o0, o1); success = int128_eq(oldv, cmpv); if (!success) { newv = oldv; } cpu_stq_data_ra(env, a0 + 0, int128_getlo(newv), ra); cpu_stq_data_ra(env, a0 + 8, int128_gethi(newv), ra); if (success) { eflags |= CC_Z; } else { env->regs[R_EAX] = int128_getlo(oldv); env->regs[R_EDX] = int128_gethi(oldv); eflags &= ~CC_Z; } CC_SRC = eflags; }
static uint64_t lookup_bte64(CPUX86State *env, uint64_t base, uintptr_t ra) { uint64_t bndcsr, bde, bt; if ((env->hflags & HF_CPL_MASK) == 3) { bndcsr = env->bndcs_regs.cfgu; } else { bndcsr = env->msr_bndcfgs; } bde = (extract64(base, 20, 28) << 3) + (extract64(bndcsr, 20, 44) << 12); bt = cpu_ldq_data_ra(env, bde, ra); if ((bt & 1) == 0) { env->bndcs_regs.sts = bde | 2; raise_exception_ra(env, EXCP05_BOUND, ra); } return (extract64(base, 3, 17) << 5) + (bt & ~7); }