From f0c0e0c6fa198ed3700be4a2bd8f3cc7d70fc127 Mon Sep 17 00:00:00 2001
From: Maksim Shabunin <maksim.shabunin@gmail.com>
Date: Sun, 25 Feb 2018 13:32:27 +0300
Subject: [PATCH] CPU dispatching: additional AVX-512 check for mingw-w64

---
 cmake/checks/cpu_avx512.cpp    | 3 +++
 cmake/checks/cpu_avx512skx.cpp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/cmake/checks/cpu_avx512.cpp b/cmake/checks/cpu_avx512.cpp
index d0898ab3ee..ebb10c723d 100644
--- a/cmake/checks/cpu_avx512.cpp
+++ b/cmake/checks/cpu_avx512.cpp
@@ -3,6 +3,9 @@
 void test()
 {
     __m512i zmm = _mm512_setzero_si512();
+#if defined __GNUC__ && defined __x86_64__
+    asm volatile ("" : : : "zmm16", "zmm17", "zmm18", "zmm19");
+#endif
 }
 #else
 #error "AVX512 is not supported"
diff --git a/cmake/checks/cpu_avx512skx.cpp b/cmake/checks/cpu_avx512skx.cpp
index 375b62ea0c..2faa2bfaf8 100644
--- a/cmake/checks/cpu_avx512skx.cpp
+++ b/cmake/checks/cpu_avx512skx.cpp
@@ -7,6 +7,9 @@ void test()
     __m256i b = _mm256_abs_epi64(a); // VL
     __m512i c = _mm512_abs_epi8(zmm); // BW
     __m512i d = _mm512_broadcast_i32x8(b); // DQ
+#if defined __GNUC__ && defined __x86_64__
+    asm volatile ("" : : : "zmm16", "zmm17", "zmm18", "zmm19");
+#endif
 }
 #else
 #error "AVX512-SKX is not supported"