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-rw-r--r--config/c-compiler.m41
1 files changed, 1 insertions, 0 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4
index 5f3e1d1faf9..da40bd6a647 100644
--- a/config/c-compiler.m4
+++ b/config/c-compiler.m4
@@ -602,6 +602,7 @@ AC_CACHE_CHECK([for _mm512_clmulepi64_epi128], [Ac_cachevar],
{
__m128i z;
+ x = _mm512_xor_si512(_mm512_zextsi128_si512(_mm_cvtsi32_si128(0)), x);
y = _mm512_clmulepi64_epi128(x, y, 0);
z = _mm_ternarylogic_epi64(
_mm512_castsi512_si128(y),