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target-i386: Fix SMSW for 64-bit mode 

In non-64-bit modes, the instruction always stores 16 bits.
But in 64-bit mode, when the destination is a register, the
instruction can write 32 or 64 bits.

Tested-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-03-01 08:59:32 -08:00
parent 880f848650
commit a657f79e32
1 changed files with 8 additions and 6 deletions
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14
target-i386/translate.c
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@ -7282,12 +7282,14 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
CASE_MODRM_OP(4): /* smsw */
gen_svm_check_intercept(s, pc_start, SVM_EXIT_READ_CR0);
#if defined TARGET_X86_64 && defined HOST_WORDS_BIGENDIAN
tcg_gen_ld32u_tl(cpu_T0, cpu_env, offsetof(CPUX86State, cr[0]) + 4);
#else
tcg_gen_ld32u_tl(cpu_T0, cpu_env, offsetof(CPUX86State, cr[0]));
#endif
gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 1);
tcg_gen_ld_tl(cpu_T0, cpu_env, offsetof(CPUX86State, cr[0]));
if (CODE64(s)) {
mod = (modrm >> 6) & 3;
ot = (mod != 3 ? MO_16 : s->dflag);
} else {
ot = MO_16;
}
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
break;
CASE_MODRM_OP(6): /* lmsw */