tcg: Introduce tcg_zero_i128()
Extract tcg_zero_i128() helper for re-use. Inspired-by: James Hilliard <james.hilliard1@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20260520121644.10835-1-philmd@linaro.org> [rth: Move the function to tcg-op.c] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Philippe Mathieu-Daudé committed
May 19, 2026 at 20:39 UTC
0eaa17b3138cfea4de5b3cc429ecd0b28e0b4a6f
3 files changed
+13
-4
include/tcg/tcg-op-common.h
+2
@@ -18,6 +18,8 @@ TCGv_vaddr tcg_constant_vaddr(uintptr_t val);
18
TCGv_vec tcg_constant_vec(TCGType type, unsigned vece, int64_t val);
19
TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val);
20
21
+TCGv_i128 tcg_zero_i128(void);
22
+
23
TCGv_i32 tcg_temp_new_i32(void);
24
TCGv_i64 tcg_temp_new_i64(void);
25
TCGv_ptr tcg_temp_new_ptr(void);
target/arm/tcg/translate-a64.c
+1
-4
@@ -4804,13 +4804,10 @@ static bool do_STG(DisasContext *s, arg_ldst_tag *a, bool is_zero, bool is_pair)
4804
4805
if (is_zero) {
4806
TCGv_i64 clean_addr = clean_data_tbi(s, addr);
4807
- TCGv_i64 zero64 = tcg_constant_i64(0);
4808
- TCGv_i128 zero128 = tcg_temp_new_i128();
4807
+ TCGv_i128 zero128 = tcg_zero_i128();
4808
int mem_index = get_mem_index(s);
4809
MemOp mop = finalize_memop(s, MO_128 | MO_ALIGN);
4810
4812
- tcg_gen_concat_i64_i128(zero128, zero64, zero64);
4813
-
4811
/* This is 1 or 2 atomic 16-byte operations. */
4812
tcg_gen_qemu_st_i128(zero128, clean_addr, mem_index, mop);
4813
if (is_pair) {
tcg/tcg-op.c
+10
@@ -2475,6 +2475,16 @@ void tcg_gen_concat_i64_i128(TCGv_i128 ret, TCGv_i64 lo, TCGv_i64 hi)
2475
tcg_gen_mov_i64(TCGV128_HIGH(ret), hi);
2476
}
2477
2478
+TCGv_i128 tcg_zero_i128(void)
2479
+{
2480
+ TCGv_i64 zero64 = tcg_constant_i64(0);
2481
+ TCGv_i128 zero128 = tcg_temp_new_i128();
2482
+
2483
+ tcg_gen_concat_i64_i128(zero128, zero64, zero64);
2484
+
2485
+ return zero128;
2486
+}
2487
+
2488
void tcg_gen_mov_i128(TCGv_i128 dst, TCGv_i128 src)
2489
{
2490
if (dst != src) {