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tcg: Split out tcg_out_ext16s

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We will need a backend interface for performing 16-bit sign-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-04-05 14:49:59 -07:00
parent d0e66c897f
commit 753e42eada
11 changed files with 79 additions and 52 deletions
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13
tcg/aarch64/tcg-target.c.inc
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@ -1424,6 +1424,11 @@ static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rn)
tcg_out_sxt(s, type, MO_8, rd, rn);
}
static void tcg_out_ext16s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rn)
{
tcg_out_sxt(s, type, MO_16, rd, rn);
}
static inline void tcg_out_uxt(TCGContext *s, MemOp s_bits,
TCGReg rd, TCGReg rn)
{
@ -2233,17 +2238,13 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out_rev(s, TCG_TYPE_I32, MO_16, a0, a1);
if (a2 & TCG_BSWAP_OS) {
/* Output must be sign-extended. */
tcg_out_sxt(s, ext, MO_16, a0, a0);
tcg_out_ext16s(s, ext, a0, a0);
} else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) {
/* Output must be zero-extended, but input isn't. */
tcg_out_uxt(s, MO_16, a0, a0);
}
break;
case INDEX_op_ext16s_i64:
case INDEX_op_ext16s_i32:
tcg_out_sxt(s, ext, MO_16, a0, a1);
break;
case INDEX_op_ext_i32_i64:
case INDEX_op_ext32s_i64:
tcg_out_sxt(s, TCG_TYPE_I64, MO_32, a0, a1);
@ -2316,6 +2317,8 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
case INDEX_op_ext8s_i64:
case INDEX_op_ext8u_i32:
case INDEX_op_ext8u_i64:
case INDEX_op_ext16s_i64:
case INDEX_op_ext16s_i32:
default:
g_assert_not_reached();
}