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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.

Backports commit d1f8755fc93911f5b27246b1da794542d222fa1b from qemu
This commit is contained in:
Richard Henderson 2019-11-18 20:21:56 -05:00 committed by Lioncash
parent 25ccd28e78
commit 4dd30ebfbd
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 10 additions and 16 deletions
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26
qemu/target/arm/translate.c
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@ -8937,19 +8937,16 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
shift = (insn >> 7) & 0x1f;
if (insn & (1 << 6)) {
/* pkhtb */
if (shift == 0)
if (shift == 0) {
shift = 31;
}
tcg_gen_sari_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_andi_i32(tcg_ctx, tmp, tmp, 0xffff0000);
tcg_gen_ext16u_i32(tcg_ctx, tmp2, tmp2);
tcg_gen_deposit_i32(tcg_ctx, tmp, tmp, tmp2, 0, 16);
} else {
/* pkhbt */
if (shift)
tcg_gen_shli_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_ext16u_i32(tcg_ctx, tmp, tmp);
tcg_gen_andi_i32(tcg_ctx, tmp2, tmp2, 0xffff0000);
tcg_gen_shli_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_deposit_i32(tcg_ctx, tmp, tmp2, tmp, 0, 16);
}
tcg_gen_or_i32(tcg_ctx, tmp, tmp, tmp2);
tcg_temp_free_i32(tcg_ctx, tmp2);
store_reg(s, rd, tmp);
} else if ((insn & 0x00200020) == 0x00200000) {
@ -9981,19 +9978,16 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
shift = ((insn >> 10) & 0x1c) | ((insn >> 6) & 0x3);
if (insn & (1 << 5)) {
/* pkhtb */
if (shift == 0)
if (shift == 0) {
shift = 31;
}
tcg_gen_sari_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_andi_i32(tcg_ctx, tmp, tmp, 0xffff0000);
tcg_gen_ext16u_i32(tcg_ctx, tmp2, tmp2);
tcg_gen_deposit_i32(tcg_ctx, tmp, tmp, tmp2, 0, 16);
} else {
/* pkhbt */
if (shift)
tcg_gen_shli_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_ext16u_i32(tcg_ctx, tmp, tmp);
tcg_gen_andi_i32(tcg_ctx, tmp2, tmp2, 0xffff0000);
tcg_gen_shli_i32(tcg_ctx, tmp2, tmp2, shift);
tcg_gen_deposit_i32(tcg_ctx, tmp, tmp2, tmp, 0, 16);
}
tcg_gen_or_i32(tcg_ctx, tmp, tmp, tmp2);
tcg_temp_free_i32(tcg_ctx, tmp2);
store_reg(s, rd, tmp);
} else {