From 69789467ebb76526bffc8ad0e552858256b6a326 Mon Sep 17 00:00:00 2001
From: Michael Graeb <graebm@amazon.com>
Date: Mon, 7 Oct 2024 10:04:33 -0700
Subject: [PATCH] Add comment about tuning for "neoverse-v1" (#1153)

---
 cmake/AwsSIMD.cmake | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmake/AwsSIMD.cmake b/cmake/AwsSIMD.cmake
index 753e53397..c9bb3c155 100644
--- a/cmake/AwsSIMD.cmake
+++ b/cmake/AwsSIMD.cmake
@@ -19,6 +19,7 @@ else()
     set(AWS_CLMUL_FLAG "-mpclmul")
     set(AWS_SSE4_2_FLAG "-msse4.2")
 
+    # AWS Graviton3 processors use neoverse-v1
     check_c_compiler_flag("-mtune=neoverse-v1" HAVE_MTUNE_NEOVERSE_V1)
     if (HAVE_MTUNE_NEOVERSE_V1)
         set(AWS_ARMv8_1_FLAG "-march=armv8-a+crc+crypto -mtune=neoverse-v1")
@@ -58,7 +59,7 @@ if (USE_CPU_EXTENSIONS)
             _mm256_permutevar8x32_epi32(vec, vec);
 
             return 0;
-        }"  AWS_HAVE_AVX2_INTRINSICS)          
+        }"  AWS_HAVE_AVX2_INTRINSICS)
 
     check_c_source_compiles("
         #include <immintrin.h>