37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
// Copyright 2022 Google LLC
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// SPDX-License-Identifier: Apache-2.0
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef HIGHWAY_HWY_PER_TARGET_H_
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#define HIGHWAY_HWY_PER_TARGET_H_
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#include <stddef.h>
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// Per-target functions.
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namespace hwy {
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// Returns size in bytes of a vector, i.e. `Lanes(ScalableTag<uint8_t>())`.
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//
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// Do not cache the result, which may change after calling DisableTargets, or
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// if software requests a different vector size (e.g. when entering/exiting SME
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// streaming mode). Instead call this right before the code that depends on the
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// result, without any DisableTargets or SME transition in-between. Note that
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// this involves an indirect call, so prefer not to call this frequently nor
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// unnecessarily.
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size_t VectorBytes();
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} // namespace hwy
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#endif // HIGHWAY_HWY_PER_TARGET_H_
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