commit f8d94803f1d82fa9268053abd16f984bc535b3cd
author Peter Maydell <peter.maydell@linaro.org> Mon Sep 13 10:54:35 2021 +0100
committer Peter Maydell <peter.maydell@linaro.org> Tue Sep 21 16:28:27 2021 +0100
tree 90350b69a1bd7aa75376cb03d14a2bf0bb0e1d58
parent 4b1561c4720bff2b438f53a73349aca118d6a519

target/arm: Optimize MVE VDUP

Optimize the MVE VDUP insns by using TCG vector ops when possible.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210913095440.13462-8-peter.maydell@linaro.org

target/arm/translate-mve.c

diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index d30c7e5..13de552 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -500,11 +500,15 @@
         return true;
     }
 
-    qd = mve_qreg_ptr(a->qd);
     rt = load_reg(s, a->rt);
-    tcg_gen_dup_i32(a->size, rt, rt);
-    gen_helper_mve_vdup(cpu_env, qd, rt);
-    tcg_temp_free_ptr(qd);
+    if (mve_no_predication(s)) {
+        tcg_gen_gvec_dup_i32(a->size, mve_qreg_offset(a->qd), 16, 16, rt);
+    } else {
+        qd = mve_qreg_ptr(a->qd);
+        tcg_gen_dup_i32(a->size, rt, rt);
+        gen_helper_mve_vdup(cpu_env, qd, rt);
+        tcg_temp_free_ptr(qd);
+    }
     tcg_temp_free_i32(rt);
     mve_update_eci(s);
     return true;