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target/arm: Use tcg_gen_extract_i32 for shifter_out_im

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Extract is a compact combination of shift + and.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190808202616.13782-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2019-08-08 13:26:10 -07:00 committed by Peter Maydell
parent 30e3537fa5
commit 191f4bfe8d
1 changed files with 1 additions and 8 deletions
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9
target/arm/translate.c
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@ -605,14 +605,7 @@ static void gen_sar(TCGv_i32 dest, TCGv_i32 t0, TCGv_i32 t1)
static void shifter_out_im(TCGv_i32 var, int shift)
{
if (shift == 0) {
tcg_gen_andi_i32(cpu_CF, var, 1);
} else {
tcg_gen_shri_i32(cpu_CF, var, shift);
if (shift != 31) {
tcg_gen_andi_i32(cpu_CF, cpu_CF, 1);
}
}
tcg_gen_extract_i32(cpu_CF, var, shift, 1);
}
/* Shift by immediate. Includes special handling for shift == 0. */