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tcg: Use deposit and extract2 in tcg_gen_shifti_i64

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Backports commit 02616bad6f0788652deaca9a48d0dfa7716ff87a from qemu
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Richard Henderson 2019-04-30 09:32:34 -04:00 committed by Lioncash
parent 269fa0daba
commit 948635602c
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 25 additions and 23 deletions
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48
qemu/tcg/tcg-op.c
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@ -1362,31 +1362,33 @@ static inline void tcg_gen_shifti_i64(TCGContext *s, TCGv_i64 ret, TCGv_i64 arg1
tcg_gen_shli_i32(s, TCGV_HIGH(s, ret), TCGV_LOW(s, arg1), c);
tcg_gen_movi_i32(s, TCGV_LOW(s, ret), 0);
}
} else {
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32(s);
t1 = tcg_temp_new_i32(s);
if (right) {
tcg_gen_shli_i32(s, t0, TCGV_HIGH(s, arg1), 32 - c);
if (arith) {
tcg_gen_sari_i32(s, t1, TCGV_HIGH(s, arg1), c);
} else {
tcg_gen_shri_i32(s, t1, TCGV_HIGH(s, arg1), c);
}
tcg_gen_shri_i32(s, TCGV_LOW(s, ret), TCGV_LOW(s, arg1), c);
tcg_gen_or_i32(s, TCGV_LOW(s, ret), TCGV_LOW(s, ret), t0);
tcg_gen_mov_i32(s, TCGV_HIGH(s, ret), t1);
} else if (right) {
if (TCG_TARGET_HAS_extract2_i32) {
tcg_gen_extract2_i32(s, TCGV_LOW(s, ret),
TCGV_LOW(s, arg1), TCGV_HIGH(s, arg1), c);
} else {
tcg_gen_shri_i32(s, t0, TCGV_LOW(s, arg1), 32 - c);
/* Note: ret can be the same as arg1, so we use t1 */
tcg_gen_shli_i32(s, t1, TCGV_LOW(s, arg1), c);
tcg_gen_shli_i32(s, TCGV_HIGH(s, ret), TCGV_HIGH(s, arg1), c);
tcg_gen_or_i32(s, TCGV_HIGH(s, ret), TCGV_HIGH(s, ret), t0);
tcg_gen_mov_i32(s, TCGV_LOW(s, ret), t1);
tcg_gen_shri_i32(s, TCGV_LOW(s, ret), TCGV_LOW(s, arg1), c);
tcg_gen_deposit_i32(s, TCGV_LOW(s, ret), TCGV_LOW(s, ret),
TCGV_HIGH(s, arg1), 32 - c, c);
}
tcg_temp_free_i32(s, t0);
tcg_temp_free_i32(s, t1);
if (arith) {
tcg_gen_sari_i32(s, TCGV_HIGH(s, ret), TCGV_HIGH(s, arg1), c);
} else {
tcg_gen_shri_i32(s, TCGV_HIGH(s, ret), TCGV_HIGH(s, arg1), c);
}
} else {
if (TCG_TARGET_HAS_extract2_i32) {
tcg_gen_extract2_i32(s, TCGV_HIGH(s, ret),
TCGV_LOW(s, arg1), TCGV_HIGH(s, arg1), 32 - c);
} else {
TCGv_i32 t0 = tcg_temp_new_i32(s);
tcg_gen_shri_i32(s, t0, TCGV_LOW(s, arg1), 32 - c);
tcg_gen_deposit_i32(s, TCGV_HIGH(s, ret), t0,
TCGV_HIGH(s, arg1), c, 32 - c);
tcg_temp_free_i32(s, t0);
}
tcg_gen_shli_i32(s, TCGV_LOW(s, ret), TCGV_LOW(s, arg1), c);
}
}