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target/arm: Use tcg_gen_deposit_i32 for PKHBT, PKHTB

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Use deposit as the composit operation to merge the
bits from the two inputs.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190808202616.13782-3-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 13:26:11 -07:00 committed by Peter Maydell
parent 191f4bfe8d
commit d1f8755fc9
1 changed files with 10 additions and 16 deletions
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26
target/arm/translate.c
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@ -8754,19 +8754,16 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
shift = (insn >> 7) & 0x1f; shift = (insn >> 7) & 0x1f;
if (insn & (1 << 6)) { if (insn & (1 << 6)) {
/* pkhtb */ /* pkhtb */
if (shift == 0) if (shift == 0) {
shift = 31; shift = 31;
}
tcg_gen_sari_i32(tmp2, tmp2, shift); tcg_gen_sari_i32(tmp2, tmp2, shift);
tcg_gen_andi_i32(tmp, tmp, 0xffff0000); tcg_gen_deposit_i32(tmp, tmp, tmp2, 0, 16);
tcg_gen_ext16u_i32(tmp2, tmp2);
} else { } else {
/* pkhbt */ /* pkhbt */
if (shift) tcg_gen_shli_i32(tmp2, tmp2, shift);
tcg_gen_shli_i32(tmp2, tmp2, shift); tcg_gen_deposit_i32(tmp, tmp2, tmp, 0, 16);
tcg_gen_ext16u_i32(tmp, tmp);
tcg_gen_andi_i32(tmp2, tmp2, 0xffff0000);
} }
tcg_gen_or_i32(tmp, tmp, tmp2);
tcg_temp_free_i32(tmp2); tcg_temp_free_i32(tmp2);
store_reg(s, rd, tmp); store_reg(s, rd, tmp);
} else if ((insn & 0x00200020) == 0x00200000) { } else if ((insn & 0x00200020) == 0x00200000) {
@ -9802,19 +9799,16 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
shift = ((insn >> 10) & 0x1c) | ((insn >> 6) & 0x3); shift = ((insn >> 10) & 0x1c) | ((insn >> 6) & 0x3);
if (insn & (1 << 5)) { if (insn & (1 << 5)) {
/* pkhtb */ /* pkhtb */
if (shift == 0) if (shift == 0) {
shift = 31; shift = 31;
}
tcg_gen_sari_i32(tmp2, tmp2, shift); tcg_gen_sari_i32(tmp2, tmp2, shift);
tcg_gen_andi_i32(tmp, tmp, 0xffff0000); tcg_gen_deposit_i32(tmp, tmp, tmp2, 0, 16);
tcg_gen_ext16u_i32(tmp2, tmp2);
} else { } else {
/* pkhbt */ /* pkhbt */
if (shift) tcg_gen_shli_i32(tmp2, tmp2, shift);
tcg_gen_shli_i32(tmp2, tmp2, shift); tcg_gen_deposit_i32(tmp, tmp2, tmp, 0, 16);
tcg_gen_ext16u_i32(tmp, tmp);
tcg_gen_andi_i32(tmp2, tmp2, 0xffff0000);
} }
tcg_gen_or_i32(tmp, tmp, tmp2);
tcg_temp_free_i32(tmp2); tcg_temp_free_i32(tmp2);
store_reg(s, rd, tmp); store_reg(s, rd, tmp);
} else { } else {