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authorRichard Henderson <richard.henderson@linaro.org>2020-08-14 15:02:57 -0700
committerRichard Henderson <richard.henderson@linaro.org>2020-09-03 13:13:58 -0700
commit6a17646176e011ddc463a2870a64c7aaccfe9c50 (patch)
treec1b908477b603b8604f1abd6a916392bfe6a9da8 /tcg/tcg-op-gvec.c
parent4ca3d09cd9b2046984966ef430cca4572ae0a925 (diff)
tcg: Eliminate one store for in-place 128-bit dup_mem
Do not store back to the exact memory from which we just loaded. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/tcg-op-gvec.c')
-rw-r--r--tcg/tcg-op-gvec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/tcg/tcg-op-gvec.c b/tcg/tcg-op-gvec.c
index 793d4ba64c..fcc25b04e6 100644
--- a/tcg/tcg-op-gvec.c
+++ b/tcg/tcg-op-gvec.c
@@ -1581,7 +1581,7 @@ void tcg_gen_gvec_dup_mem(unsigned vece, uint32_t dofs, uint32_t aofs,
TCGv_vec in = tcg_temp_new_vec(TCG_TYPE_V128);
tcg_gen_ld_vec(in, cpu_env, aofs);
- for (i = 0; i < oprsz; i += 16) {
+ for (i = (aofs == dofs) * 16; i < oprsz; i += 16) {
tcg_gen_st_vec(in, cpu_env, dofs + i);
}
tcg_temp_free_vec(in);
@@ -1591,7 +1591,7 @@ void tcg_gen_gvec_dup_mem(unsigned vece, uint32_t dofs, uint32_t aofs,
tcg_gen_ld_i64(in0, cpu_env, aofs);
tcg_gen_ld_i64(in1, cpu_env, aofs + 8);
- for (i = 0; i < oprsz; i += 16) {
+ for (i = (aofs == dofs) * 16; i < oprsz; i += 16) {
tcg_gen_st_i64(in0, cpu_env, dofs + i);
tcg_gen_st_i64(in1, cpu_env, dofs + i + 8);
}