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tcg/loongarch64: Simplify tcg_out_addsub_vec

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Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-05-27 19:34:29 +00:00
parent 825d53f35a
commit ce37579571
1 changed files with 15 additions and 14 deletions
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29
tcg/loongarch64/tcg-target.c.inc
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@ -1774,33 +1774,34 @@ static void tcg_out_addsub_vec(TCGContext *s, unsigned vece, const TCGArg a0,
static const LoongArchInsn sub_vec_imm_insn[4] = { static const LoongArchInsn sub_vec_imm_insn[4] = {
OPC_VSUBI_BU, OPC_VSUBI_HU, OPC_VSUBI_WU, OPC_VSUBI_DU OPC_VSUBI_BU, OPC_VSUBI_HU, OPC_VSUBI_WU, OPC_VSUBI_DU
}; };
LoongArchInsn insn;
if (a2_is_const) { if (a2_is_const) {
int64_t value = sextract64(a2, 0, 8 << vece); int64_t value = sextract64(a2, 0, 8 << vece);
if (!is_add) { if (!is_add) {
value = -value; value = -value;
} }
if (value < 0) {
/* Try vaddi/vsubi */ insn = sub_vec_imm_insn[vece];
if (0 <= value && value <= 0x1f) { value = -value;
tcg_out32(s, encode_vdvjuk5_insn(add_vec_imm_insn[vece], a0, \ } else {
a1, value)); insn = add_vec_imm_insn[vece];
return;
} else if (-0x1f <= value && value < 0) {
tcg_out32(s, encode_vdvjuk5_insn(sub_vec_imm_insn[vece], a0, \
a1, -value));
return;
} }
/* constraint TCG_CT_CONST_VADD ensures unreachable */ /* Constraint TCG_CT_CONST_VADD ensures validity. */
g_assert_not_reached(); tcg_debug_assert(0 <= value && value <= 0x1f);
tcg_out32(s, encode_vdvjuk5_insn(insn, a0, a1, value));
return;
} }
if (is_add) { if (is_add) {
tcg_out32(s, encode_vdvjvk_insn(add_vec_insn[vece], a0, a1, a2)); insn = add_vec_insn[vece];
} else { } else {
tcg_out32(s, encode_vdvjvk_insn(sub_vec_insn[vece], a0, a1, a2)); insn = sub_vec_insn[vece];
} }
tcg_out32(s, encode_vdvjvk_insn(insn, a0, a1, a2));
} }
static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc, static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,