Use _mm512_loadu_epi32 instead of memcpy

The latter somehow generated a vmovdqa64 instruction that segfaulted on unaligned memory, with gcc and --coverage. Hmm.
2024-08-01 15:24:09 -07:00
parent b8edd92698
commit 3898cb596a
1 changed files with 3 additions and 4 deletions
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -1988,12 +1988,11 @@ uint32_t compare16_32bit(const InternalVersionT *vs, InternalVersionT rv) {

 __attribute__((target("avx512f"))) uint32_t
 compare16_32bit_avx512(const InternalVersionT *vs, InternalVersionT rv) {
-  __m512i w;
-  memcpy(&w, vs, sizeof(w));
  uint32_t r;
  memcpy(&r, &rv, sizeof(r));
-  return _mm512_cmpgt_epi32_mask(_mm512_sub_epi32(w, _mm512_set1_epi32(r)),
-                                 _mm512_setzero_epi32());
+  return _mm512_cmpgt_epi32_mask(
+      _mm512_sub_epi32(_mm512_loadu_epi32(vs), _mm512_set1_epi32(r)),
+      _mm512_setzero_epi32());
 }
 #endif