1 files changed, 39 insertions, 0 deletions
diff --git a/ruy/have_built_path_for_sse42.cc b/ruy/have_built_path_for_sse42.cc
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+++ b/ruy/have_built_path_for_sse42.cc
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+/* Copyright 2019 Google LLC. All Rights Reserved.
+
+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.
+==============================================================================*/
+
+#include "ruy/have_built_path_for.h"
+#include "ruy/opt_set.h"
+
+namespace ruy {
+
+#if RUY_PLATFORM(X86)
+// IMPORTANT:
+// These patterns must match those in the pack and kernel cc files.
+#if !(RUY_PLATFORM(SSE42) && RUY_OPT_ENABLED(RUY_OPT_ASM))
+
+bool HaveBuiltPathForSse42() { return false; }
+
+#else  // RUY_PLATFORM(SSE42) && RUY_OPT_ENABLED(RUY_OPT_ASM)
+
+// TODO(b/147376783): SSE 4.2 and AVX-VNNI support is incomplete / placeholder.
+// Optimization is not finished. In particular the dimensions of the kernel
+// blocks can be changed as desired.
+//
+bool HaveBuiltPathForSse42() { return true; }
+
+#endif  // RUY_PLATFORM(SSE42) && RUY_OPT_ENABLED(RUY_OPT_ASM)
+#endif  // RUY_PLATFORM(X86)
+
+}  // namespace ruy