1 files changed, 49 insertions, 0 deletions
diff --git a/absl/container/internal/have_sse.h b/absl/container/internal/have_sse.h
new file mode 100644
index 000000000000..293478895b60
--- /dev/null
+++ b/absl/container/internal/have_sse.h
@@ -0,0 +1,49 @@
+// Copyright 2018 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Shared config probing for SSE instructions used in Swiss tables.
+#ifndef ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
+#define ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_
+
+#ifndef SWISSTABLE_HAVE_SSE2
+#if defined(__SSE2__) ||  \
+    (defined(_MSC_VER) && \
+     (defined(_M_X64) || (defined(_M_IX86) && _M_IX86_FP >= 2)))
+#define SWISSTABLE_HAVE_SSE2 1
+#else
+#define SWISSTABLE_HAVE_SSE2 0
+#endif
+#endif
+
+#ifndef SWISSTABLE_HAVE_SSSE3
+#ifdef __SSSE3__
+#define SWISSTABLE_HAVE_SSSE3 1
+#else
+#define SWISSTABLE_HAVE_SSSE3 0
+#endif
+#endif
+
+#if SWISSTABLE_HAVE_SSSE3 && !SWISSTABLE_HAVE_SSE2
+#error "Bad configuration!"
+#endif
+
+#if SWISSTABLE_HAVE_SSE2
+#include <emmintrin.h>
+#endif
+
+#if SWISSTABLE_HAVE_SSSE3
+#include <tmmintrin.h>
+#endif
+
+#endif  // ABSL_CONTAINER_INTERNAL_HAVE_SSE_H_