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41f8d2ad52
Tint makes heavy use of RTTI via virtual methods. Give the compiler the opportunity to optimize away some of these virtuals. Bug: tint:1383 Change-Id: I28edfaa0a05bb1a9c506c61c0084542c0aeb37f0 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/82745 Reviewed-by: James Price <jrprice@google.com> Reviewed-by: David Neto <dneto@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
// Copyright 2022 The Tint Authors.
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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 SRC_TINT_TRANSFORM_BUILTIN_POLYFILL_H_
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#define SRC_TINT_TRANSFORM_BUILTIN_POLYFILL_H_
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#include "src/tint/transform/transform.h"
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namespace tint {
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namespace transform {
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/// Implements builtins for backends that do not have a native implementation.
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class BuiltinPolyfill final : public Castable<BuiltinPolyfill, Transform> {
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public:
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/// Constructor
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BuiltinPolyfill();
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/// Destructor
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~BuiltinPolyfill() override;
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/// Enumerator of polyfill levels
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enum class Level {
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/// No polyfill needed, supported by the backend.
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kNone,
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/// Clamp the parameters to the inner implementation.
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kClampParameters,
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/// Polyfill the entire function
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kFull,
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};
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/// Specifies the builtins that should be polyfilled by the transform.
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struct Builtins {
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/// Should `countLeadingZeros()` be polyfilled?
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bool count_leading_zeros = false;
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/// Should `countTrailingZeros()` be polyfilled?
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bool count_trailing_zeros = false;
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/// What level should `extractBits()` be polyfilled?
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Level extract_bits = Level::kNone;
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/// Should `firstLeadingBit()` be polyfilled?
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bool first_leading_bit = false;
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/// Should `firstTrailingBit()` be polyfilled?
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bool first_trailing_bit = false;
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/// Should `insertBits()` be polyfilled?
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Level insert_bits = Level::kNone;
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};
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/// Config is consumed by the BuiltinPolyfill transform.
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/// Config specifies the builtins that should be polyfilled.
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struct Config final : public Castable<Data, transform::Data> {
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/// Constructor
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/// @param b the list of builtins to polyfill
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explicit Config(const Builtins& b);
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/// Copy constructor
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Config(const Config&);
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/// Destructor
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~Config() override;
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/// The builtins to polyfill
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const Builtins builtins;
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};
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/// @param program the program to inspect
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/// @param data optional extra transform-specific input data
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/// @returns true if this transform should be run for the given program
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bool ShouldRun(const Program* program,
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const DataMap& data = {}) const override;
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protected:
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struct State;
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/// Runs the transform using the CloneContext built for transforming a
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/// program. Run() is responsible for calling Clone() on the CloneContext.
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/// @param ctx the CloneContext primed with the input program and
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/// ProgramBuilder
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/// @param inputs optional extra transform-specific input data
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/// @param outputs optional extra transform-specific output data
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void Run(CloneContext& ctx,
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const DataMap& inputs,
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DataMap& outputs) const override;
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};
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} // namespace transform
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} // namespace tint
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#endif // SRC_TINT_TRANSFORM_BUILTIN_POLYFILL_H_
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