remove unecessary xor

austindonisan · Feb 2, 2024 · 2456f75 · 2456f75
1 parent 920e354
commit 2456f75
Showing 1 changed file with 0 additions and 1 deletion.
diff --git a/1brc.c b/1brc.c
@@ -918,7 +918,6 @@ __attribute__((always_inline)) inline __m256i hash_cities(__m256i a, __m256i b,
   __m256i acegbdfh = (__m256i) _mm256_shuffle_ps((__m256)acbd, (__m256)egfh, 0x88);
 
   __m256i hash = _mm256_madd_epi16(acegbdfh, acegbdfh);
-  hash = _mm256_xor_si256(hash, acegbdfh);
   __m256i hash_mask = _mm256_set1_epi32(HASH_SHORT_MASK);
   return _mm256_and_si256(hash, hash_mask);
 }