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target-i386: Use MO_BE for movbe

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Fold the bswap into the memory operation.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-11-02 09:22:04 -10:00
parent 4eeb3939b5
commit 3655a19fdd
1 changed files with 5 additions and 35 deletions
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40
target-i386/translate.c
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@ -3869,44 +3869,14 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
ot = MO_64; ot = MO_64;
} }
/* Load the data incoming to the bswap. Note that the TCG gen_lea_modrm(env, s, modrm);
implementation of bswap requires the input be zero
extended. In the case of the loads, we simply know that
gen_op_ld_v via gen_ldst_modrm does that already. */
if ((b & 1) == 0) {
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
} else {
switch (ot) {
case MO_16:
tcg_gen_ext16u_tl(cpu_T[0], cpu_regs[reg]);
break;
default:
tcg_gen_ext32u_tl(cpu_T[0], cpu_regs[reg]);
break;
case MO_64:
tcg_gen_mov_tl(cpu_T[0], cpu_regs[reg]);
break;
}
}
switch (ot) {
case MO_16:
tcg_gen_bswap16_tl(cpu_T[0], cpu_T[0]);
break;
default:
tcg_gen_bswap32_tl(cpu_T[0], cpu_T[0]);
break;
#ifdef TARGET_X86_64
case MO_64:
tcg_gen_bswap64_tl(cpu_T[0], cpu_T[0]);
break;
#endif
}
if ((b & 1) == 0) { if ((b & 1) == 0) {
tcg_gen_qemu_ld_tl(cpu_T[0], cpu_A0,
s->mem_index, ot | MO_BE);
gen_op_mov_reg_T0(ot, reg); gen_op_mov_reg_T0(ot, reg);
} else { } else {
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1); tcg_gen_qemu_st_tl(cpu_regs[reg], cpu_A0,
s->mem_index, ot | MO_BE);
} }
break; break;