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target-i386: Tidy gen_op_mov_TN_reg+tcg_gen_trunc_tl_i32

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For the 16 and 32-bit cases, we don't need to truncate via
a temporary register.

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 09:35:30 -10:00
parent 3655a19fdd
commit 24b9c00fc3
1 changed files with 3 additions and 6 deletions
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9
target-i386/translate.c
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@ -1259,8 +1259,7 @@ static inline void gen_ins(DisasContext *s, int ot)
case of page fault. */
gen_op_movl_T0_0();
gen_op_st_v(s, ot, cpu_T[0], cpu_A0);
gen_op_mov_TN_reg(MO_16, 1, R_EDX);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[1]);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_regs[R_EDX]);
tcg_gen_andi_i32(cpu_tmp2_i32, cpu_tmp2_i32, 0xffff);
gen_helper_in_func(ot, cpu_T[0], cpu_tmp2_i32);
gen_op_st_v(s, ot, cpu_T[0], cpu_A0);
@ -1277,8 +1276,7 @@ static inline void gen_outs(DisasContext *s, int ot)
gen_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, cpu_T[0], cpu_A0);
gen_op_mov_TN_reg(MO_16, 1, R_EDX);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[1]);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_regs[R_EDX]);
tcg_gen_andi_i32(cpu_tmp2_i32, cpu_tmp2_i32, 0xffff);
tcg_gen_trunc_tl_i32(cpu_tmp3_i32, cpu_T[0]);
gen_helper_out_func(ot, cpu_tmp2_i32, cpu_tmp3_i32);
@ -3839,8 +3837,7 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
ot = MO_64;
}
gen_op_mov_TN_reg(MO_32, 0, reg);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_regs[reg]);
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
gen_helper_crc32(cpu_T[0], cpu_tmp2_i32,
cpu_T[0], tcg_const_i32(8 << ot));