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[PATCH 14/17] target/arm: Clear high SVE elements in handle_vec_simd_wsh


From: Richard Henderson
Subject: [PATCH 14/17] target/arm: Clear high SVE elements in handle_vec_simd_wshli
Date: Wed, 17 Jul 2024 16:09:00 +1000

AdvSIMD instructions are supposed to zero bits beyond 128.
Affects SSHLL, USHLL, SSHLL2, USHLL2.

Cc: qemu-stable@nongnu.org
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/translate-a64.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index fd90752dee..d0ad6c90bc 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -10471,6 +10471,7 @@ static void handle_vec_simd_wshli(DisasContext *s, bool 
is_q, bool is_u,
         tcg_gen_shli_i64(tcg_rd, tcg_rd, shift);
         write_vec_element(s, tcg_rd, rd, i, size + 1);
     }
+    clear_vec_high(s, true, rd);
 }
 
 /* SHRN/RSHRN - Shift right with narrowing (and potential rounding) */
-- 
2.43.0




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