Update comments

1 files changed, 1 insertions, 3 deletions

diff --git a/ppc_simd.h b/ppc_simd.h
index 91e4b2aa..9c264fe7 100644
--- a/ppc_simd.h
+++ b/ppc_simd.h
@@ -1971,7 +1971,7 @@ inline uint32x4_p VecAdd64(const uint32x4_p& vec1, const uint32x4_p& vec2)
 #else

     // The carry mask selects carrys for elements 1 and 3 and sets

     // remaining elements to 0. The results is then shifted so the

-    // carried values are subtracted from elements 0 and 2.

+    // carried values are added to elements 0 and 2.

 #if defined(CRYPTOPP_BIG_ENDIAN)

     const uint32x4_p zero = {0, 0, 0, 0};

     const uint32x4_p mask = {0, 1, 0, 1};

@@ -1980,8 +1980,6 @@ inline uint32x4_p VecAdd64(const uint32x4_p& vec1, const uint32x4_p& vec2)
     const uint32x4_p mask = {1, 0, 1, 0};

 #endif

 

-    // subc sets the compliment of borrow, so we have to un-compliment it

-    // using andc.

     uint32x4_p cy = vec_addc(vec1, vec2);

     uint32x4_p res = vec_add(vec1, vec2);

     cy = vec_and(mask, cy);