1 files changed, 261 insertions, 0 deletions
diff --git a/third_party/highway/hwy/foreach_target.h b/third_party/highway/hwy/foreach_target.h
new file mode 100644
index 0000000000..3929905ca2
--- /dev/null
+++ b/third_party/highway/hwy/foreach_target.h
@@ -0,0 +1,261 @@
+// Copyright 2020 Google LLC
+// SPDX-License-Identifier: Apache-2.0
+//
+// 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.
+
+#ifndef HIGHWAY_HWY_FOREACH_TARGET_H_
+#define HIGHWAY_HWY_FOREACH_TARGET_H_
+
+// Re-includes the translation unit zero or more times to compile for any
+// targets except HWY_STATIC_TARGET. Defines unique HWY_TARGET each time so that
+// highway.h defines the corresponding macro/namespace.
+
+#include "hwy/detect_targets.h"
+
+// *_inl.h may include other headers, which requires include guards to prevent
+// repeated inclusion. The guards must be reset after compiling each target, so
+// the header is again visible. This is done by flipping HWY_TARGET_TOGGLE,
+// defining it if undefined and vice versa. This macro is initially undefined
+// so that IDEs don't gray out the contents of each header.
+#ifdef HWY_TARGET_TOGGLE
+#error "This macro must not be defined outside foreach_target.h"
+#endif
+
+#ifdef HWY_HIGHWAY_INCLUDED  // highway.h include guard
+// Trigger fixup at the bottom of this header.
+#define HWY_ALREADY_INCLUDED
+
+// The next highway.h must re-include set_macros-inl.h because the first
+// highway.h chose the static target instead of what we will set below.
+#undef HWY_SET_MACROS_PER_TARGET
+#endif
+
+// Disable HWY_EXPORT in user code until we have generated all targets. Note
+// that a subsequent highway.h will not override this definition.
+#undef HWY_ONCE
+#define HWY_ONCE (0 || HWY_IDE)
+
+// Avoid warnings on #include HWY_TARGET_INCLUDE by hiding them from the IDE;
+// also skip if only 1 target defined (no re-inclusion will be necessary).
+#if !HWY_IDE && (HWY_TARGETS != HWY_STATIC_TARGET)
+
+#if !defined(HWY_TARGET_INCLUDE)
+#error ">1 target enabled => define HWY_TARGET_INCLUDE before foreach_target.h"
+#endif
+
+#if (HWY_TARGETS & HWY_EMU128) && (HWY_STATIC_TARGET != HWY_EMU128)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_EMU128
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SCALAR) && (HWY_STATIC_TARGET != HWY_SCALAR)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SCALAR
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_NEON) && (HWY_STATIC_TARGET != HWY_NEON)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_NEON
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_RVV) && (HWY_STATIC_TARGET != HWY_RVV)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_RVV
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SVE) && (HWY_STATIC_TARGET != HWY_SVE)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SVE
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SVE2) && (HWY_STATIC_TARGET != HWY_SVE2)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SVE2
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SVE_256) && (HWY_STATIC_TARGET != HWY_SVE_256)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SVE_256
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SVE2_128) && (HWY_STATIC_TARGET != HWY_SVE2_128)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SVE2_128
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SSSE3) && (HWY_STATIC_TARGET != HWY_SSSE3)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SSSE3
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_SSE4) && (HWY_STATIC_TARGET != HWY_SSE4)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_SSE4
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_AVX2) && (HWY_STATIC_TARGET != HWY_AVX2)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_AVX2
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_AVX3) && (HWY_STATIC_TARGET != HWY_AVX3)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_AVX3
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_AVX3_DL) && (HWY_STATIC_TARGET != HWY_AVX3_DL)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_AVX3_DL
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_WASM_EMU256) && (HWY_STATIC_TARGET != HWY_WASM_EMU256)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_WASM_EMU256
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_WASM) && (HWY_STATIC_TARGET != HWY_WASM)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_WASM
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#if (HWY_TARGETS & HWY_PPC8) && (HWY_STATIC_TARGET != HWY_PPC8)
+#undef HWY_TARGET
+#define HWY_TARGET HWY_PPC8
+#include HWY_TARGET_INCLUDE
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+#endif
+
+#endif  // !HWY_IDE && (HWY_TARGETS != HWY_STATIC_TARGET)
+
+// Now that all but the static target have been generated, re-enable HWY_EXPORT.
+#undef HWY_ONCE
+#define HWY_ONCE 1
+
+// If we re-include once per enabled target, the translation unit's
+// implementation would have to be skipped via #if to avoid redefining symbols.
+// We instead skip the re-include for HWY_STATIC_TARGET, and generate its
+// implementation when resuming compilation of the translation unit.
+#undef HWY_TARGET
+#define HWY_TARGET HWY_STATIC_TARGET
+
+#ifdef HWY_ALREADY_INCLUDED
+// Revert the previous toggle to prevent redefinitions for the static target.
+#ifdef HWY_TARGET_TOGGLE
+#undef HWY_TARGET_TOGGLE
+#else
+#define HWY_TARGET_TOGGLE
+#endif
+
+// Force re-inclusion of set_macros-inl.h now that HWY_TARGET is restored.
+#ifdef HWY_SET_MACROS_PER_TARGET
+#undef HWY_SET_MACROS_PER_TARGET
+#else
+#define HWY_SET_MACROS_PER_TARGET
+#endif
+#endif
+
+#endif  // HIGHWAY_HWY_FOREACH_TARGET_H_