diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 6effd7d42d18c9b526aaaec93a44e8801908e164..a19d1711b5bcb516e4aca6a22d1b79df4f32923f 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -3993,15 +3993,12 @@ (define_insn "aarch64_<sur>shll_n<mode>"
"aarch64_simd_shift_imm_bitsize_<ve_mode>" "i")]
VSHLL))]
"TARGET_SIMD"
- "*
- int bit_width = GET_MODE_UNIT_SIZE (<MODE>mode) * BITS_PER_UNIT;
- if (INTVAL (operands[2]) == bit_width)
{
- return \"shll\\t%0.<Vwtype>, %1.<Vtype>, %2\";
+ if (INTVAL (operands[2]) == GET_MODE_UNIT_BITSIZE (<MODE>mode))
+ return "shll\\t%0.<Vwtype>, %1.<Vtype>, %2";
+ else
+ return "<sur>shll\\t%0.<Vwtype>, %1.<Vtype>, %2";