/**
 * @license
 * Copyright 2020 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.
 * =============================================================================
 */
import { backend_util, env, upcastType } from '@tensorflow/tfjs-core';
import { BinaryOpProgram } from '../binaryop_gpu';
import { BinaryOpPackedProgram } from '../binaryop_packed_gpu';
import { complex } from '../kernels/Complex';
import { LEAKYRELU, LEAKYRELU_PACKED } from '../kernels/LeakyRelu';
import { PRELU, PRELU_PACKED } from '../kernels/Prelu';
import * as unary_op from '../unaryop_gpu';
import { UnaryOpProgram } from '../unaryop_gpu';
import * as unary_packed_op from '../unaryop_packed_gpu';
import { UnaryOpPackedProgram } from '../unaryop_packed_gpu';
export const CHECK_NAN_SNIPPET_UNARY = `if (isnan(x)) return x;`;
/**
 * Template that creates a `KernelFunc` for unary ops.
 * @param opSnippet Op snippet to create `UnaryOpProgram`.
 * @param packedOpSnippet Op snippet to create `UnaryOpPackedProgram`.
 * @param dtype Optional. If set, the result has this dtype. Otherwise, the
 *     result has the same dtype as the first input. This is mainly used in
 *     comparison kernels, such as Equal, Less, Greater, etc.
 */
export function unaryKernelFunc({ opSnippet, packedOpSnippet, cpuKernelImpl, dtype }) {
    return ({ inputs, backend }) => {
        const { x } = inputs;
        const webglBackend = backend;
        const $dtype = dtype || x.dtype;
        if (webglBackend.shouldExecuteOnCPU([x]) && cpuKernelImpl != null) {
            const xData = webglBackend.texData.get(x.dataId);
            const outValues = cpuKernelImpl(xData.values, $dtype);
            return webglBackend.makeTensorInfo(x.shape, $dtype, outValues);
        }
        const shouldUsePackedProgram = env().getBool('WEBGL_PACK_UNARY_OPERATIONS') && packedOpSnippet != null;
        let program;
        if (shouldUsePackedProgram) {
            program = new UnaryOpPackedProgram(x.shape, packedOpSnippet);
        }
        else {
            program = new UnaryOpProgram(x.shape, opSnippet);
        }
        return webglBackend.runWebGLProgram(program, [x], $dtype);
    };
}
/**
 * Template that creates a `KernelFunc` for binary ops.
 * @param opSnippet Op snippet to create `BinaryOpProgram`.
 * @param packedOpSnippet Op snippet to create `BinaryOpPackedProgram`.
 * @param checkOutOfBoundsForPackedProgram Whether to set checkOutOfBounds=true
 *     when creating BinaryOpPackedProgram.
 * @param dtype Optional. If set, the result has this dtype. Otherwise, the
 *     result has the same dtype as the first input. This is mainly used in
 *     comparison kernels, such as Equal, Less, Greater, etc.
 */
export function binaryKernelFunc({ opSnippet, packedOpSnippet, checkOutOfBounds = false, supportsComplex = false, cpuKernelImpl, dtype }) {
    return ({ inputs, backend }) => {
        const { a, b } = inputs;
        const webglBackend = backend;
        if (supportsComplex && a.dtype === 'complex64') {
            const aData = webglBackend.texData.get(a.dataId);
            const bData = webglBackend.texData.get(b.dataId);
            const [real, imag] = [
                [aData.complexTensorInfos.real, bData.complexTensorInfos.real],
                [aData.complexTensorInfos.imag, bData.complexTensorInfos.imag]
            ].map(complexParts => {
                const [aPart, bPart] = complexParts;
                const aHandle = {
                    dataId: aPart.dataId,
                    dtype: aPart.dtype,
                    shape: a.shape
                };
                const bHandle = {
                    dataId: bPart.dataId,
                    dtype: bPart.dtype,
                    shape: b.shape
                };
                const program = new BinaryOpProgram(opSnippet, a.shape, b.shape);
                return webglBackend.runWebGLProgram(program, [aHandle, bHandle], upcastType(aPart.dtype, bPart.dtype));
            });
            const complexOutput = complex({ inputs: { real, imag }, backend: webglBackend });
            webglBackend.disposeIntermediateTensorInfo(real);
            webglBackend.disposeIntermediateTensorInfo(imag);
            // TODO(annxingyuan): Implement CPU forwarding for complex inputs.
            return complexOutput;
        }
        const $dtype = dtype || upcastType(a.dtype, b.dtype);
        if ((a.dtype === 'string' || b.dtype === 'string' ||
            webglBackend.shouldExecuteOnCPU([a, b])) &&
            cpuKernelImpl != null) {
            const aVals = webglBackend.texData.get(a.dataId).values;
            const bVals = webglBackend.texData.get(b.dataId).values;
            const decodedAVals = a.dtype === 'string' ?
                // tslint:disable-next-line: no-any
                backend_util.fromUint8ToStringArray(aVals) :
                aVals;
            const decodedBVals = a.dtype === 'string' ?
                // tslint:disable-next-line: no-any
                backend_util.fromUint8ToStringArray(bVals) :
                bVals;
            const [outValues, outShape] = cpuKernelImpl(a.shape, b.shape, decodedAVals, decodedBVals, $dtype);
            const out = webglBackend.makeTensorInfo(outShape, $dtype);
            const outData = webglBackend.texData.get(out.dataId);
            outData.values = outValues;
            return out;
        }
        const shouldUsePackedProgram = env().getBool('WEBGL_PACK_BINARY_OPERATIONS') &&
            packedOpSnippet != null;
        let program;
        if (shouldUsePackedProgram) {
            program = new BinaryOpPackedProgram(packedOpSnippet, a.shape, b.shape, checkOutOfBounds);
        }
        else {
            program = new BinaryOpProgram(opSnippet, a.shape, b.shape);
        }
        return webglBackend.runWebGLProgram(program, [a, b], $dtype);
    };
}
export function mapActivationToShaderProgram(activation, packed = false) {
    if (activation === 'linear') {
        if (packed) {
            return unary_packed_op.LINEAR;
        }
        return unary_op.LINEAR;
    }
    else if (activation === 'relu') {
        if (packed) {
            return unary_packed_op.RELU;
        }
        return unary_op.RELU;
    }
    else if (activation === 'elu') {
        if (packed) {
            return unary_packed_op.ELU;
        }
        return unary_op.ELU;
    }
    else if (activation === 'relu6') {
        if (packed) {
            return unary_packed_op.RELU6;
        }
        return unary_op.RELU6;
    }
    else if (activation === 'prelu') {
        if (packed) {
            return PRELU_PACKED;
        }
        return PRELU;
    }
    else if (activation === 'leakyrelu') {
        if (packed) {
            return LEAKYRELU_PACKED;
        }
        return LEAKYRELU;
    }
    else if (activation === 'sigmoid') {
        if (packed) {
            return unary_packed_op.SIGMOID;
        }
        return unary_op.SIGMOID;
    }
    throw new Error(`Activation ${activation} has not been implemented for the WebGL backend.`);
}
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* @license\n * Copyright 2020 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport { backend_util, BinaryInputs, DataType, env, KernelFunc, TypedArray, UnaryInputs, upcastType} from '@tensorflow/tfjs-core';\n\nimport {MathBackendWebGL} from '../backend_webgl';\nimport {BinaryOpProgram} from '../binaryop_gpu';\nimport {BinaryOpPackedProgram} from '../binaryop_packed_gpu';\nimport {complex} from '../kernels/Complex';\nimport {LEAKYRELU, LEAKYRELU_PACKED} from '../kernels/LeakyRelu';\nimport {PRELU, PRELU_PACKED} from '../kernels/Prelu';\nimport * as unary_op from '../unaryop_gpu';\nimport {UnaryOpProgram} from '../unaryop_gpu';\nimport * as unary_packed_op from '../unaryop_packed_gpu';\nimport {UnaryOpPackedProgram} from '../unaryop_packed_gpu';\n\nimport {SimpleBinaryKernelImplCPU, SimpleUnaryKernelImplCPU} from './shared';\n\nexport const CHECK_NAN_SNIPPET_UNARY = `if (isnan(x)) return x;`;\n\ntype UnaryKernelFuncConfig = {\n  opSnippet: string,\n  packedOpSnippet?: string,\n  cpuKernelImpl?: SimpleUnaryKernelImplCPU,\n  dtype?: DataType,\n};\n\n/**\n * Template that creates a `KernelFunc` for unary ops.\n * @param opSnippet Op snippet to create `UnaryOpProgram`.\n * @param packedOpSnippet Op snippet to create `UnaryOpPackedProgram`.\n * @param dtype Optional. If set, the result has this dtype. Otherwise, the\n *     result has the same dtype as the first input. This is mainly used in\n *     comparison kernels, such as Equal, Less, Greater, etc.\n */\nexport function unaryKernelFunc(\n    {opSnippet, packedOpSnippet, cpuKernelImpl, dtype}: UnaryKernelFuncConfig):\n    KernelFunc {\n  return ({inputs, backend}) => {\n    const {x} = inputs as UnaryInputs;\n    const webglBackend = backend as MathBackendWebGL;\n\n    const $dtype = dtype || x.dtype;\n    if (webglBackend.shouldExecuteOnCPU([x]) && cpuKernelImpl != null) {\n      const xData = webglBackend.texData.get(x.dataId);\n      const outValues = cpuKernelImpl(xData.values as TypedArray, $dtype);\n      return webglBackend.makeTensorInfo(x.shape, $dtype, outValues);\n    }\n\n    const shouldUsePackedProgram =\n        env().getBool('WEBGL_PACK_UNARY_OPERATIONS') && packedOpSnippet != null;\n    let program: UnaryOpProgram|UnaryOpPackedProgram;\n    if (shouldUsePackedProgram) {\n      program = new UnaryOpPackedProgram(x.shape, packedOpSnippet);\n    } else {\n      program = new UnaryOpProgram(x.shape, opSnippet);\n    }\n\n    return webglBackend.runWebGLProgram(program, [x], $dtype);\n  };\n}\n\ntype BinaryKernelFuncConfig = {\n  opSnippet: string,\n  packedOpSnippet?: string,\n  checkOutOfBounds?: boolean,\n  supportsComplex?: boolean,\n  cpuKernelImpl?: SimpleBinaryKernelImplCPU,\n  dtype?: DataType\n};\n\n/**\n * Template that creates a `KernelFunc` for binary ops.\n * @param opSnippet Op snippet to create `BinaryOpProgram`.\n * @param packedOpSnippet Op snippet to create `BinaryOpPackedProgram`.\n * @param checkOutOfBoundsForPackedProgram Whether to set checkOutOfBounds=true\n *     when creating BinaryOpPackedProgram.\n * @param dtype Optional. If set, the result has this dtype. Otherwise, the\n *     result has the same dtype as the first input. This is mainly used in\n *     comparison kernels, such as Equal, Less, Greater, etc.\n */\nexport function binaryKernelFunc({\n  opSnippet,\n  packedOpSnippet,\n  checkOutOfBounds = false,\n  supportsComplex = false,\n  cpuKernelImpl,\n  dtype\n}: BinaryKernelFuncConfig): KernelFunc {\n  return ({inputs, backend}) => {\n    const {a, b} = inputs as BinaryInputs;\n    const webglBackend = backend as MathBackendWebGL;\n\n    if (supportsComplex && a.dtype === 'complex64') {\n      const aData = webglBackend.texData.get(a.dataId);\n      const bData = webglBackend.texData.get(b.dataId);\n\n      const [real, imag] = [\n        [aData.complexTensorInfos.real, bData.complexTensorInfos.real],\n        [aData.complexTensorInfos.imag, bData.complexTensorInfos.imag]\n      ].map(complexParts => {\n        const [aPart, bPart] = complexParts;\n\n        const aHandle = {\n          dataId: aPart.dataId,\n          dtype: aPart.dtype,\n          shape: a.shape\n        };\n        const bHandle = {\n          dataId: bPart.dataId,\n          dtype: bPart.dtype,\n          shape: b.shape\n        };\n\n        const program = new BinaryOpProgram(opSnippet, a.shape, b.shape);\n        return webglBackend.runWebGLProgram(\n            program, [aHandle, bHandle], upcastType(aPart.dtype, bPart.dtype));\n      });\n\n      const complexOutput =\n          complex({inputs: {real, imag}, backend: webglBackend});\n\n      webglBackend.disposeIntermediateTensorInfo(real);\n      webglBackend.disposeIntermediateTensorInfo(imag);\n\n      // TODO(annxingyuan): Implement CPU forwarding for complex inputs.\n\n      return complexOutput;\n    }\n\n    const $dtype = dtype || upcastType(a.dtype, b.dtype);\n    if ((a.dtype === 'string' || b.dtype === 'string' ||\n         webglBackend.shouldExecuteOnCPU([a, b])) &&\n        cpuKernelImpl != null) {\n      const aVals = webglBackend.texData.get(a.dataId).values as TypedArray;\n      const bVals = webglBackend.texData.get(b.dataId).values as TypedArray;\n\n      const decodedAVals = a.dtype === 'string' ?\n          // tslint:disable-next-line: no-any\n          backend_util.fromUint8ToStringArray(aVals as any as Uint8Array[]) :\n          aVals;\n      const decodedBVals = a.dtype === 'string' ?\n          // tslint:disable-next-line: no-any\n          backend_util.fromUint8ToStringArray(bVals as any as Uint8Array[]) :\n          bVals;\n      const [outValues, outShape] =\n          cpuKernelImpl(a.shape, b.shape, decodedAVals, decodedBVals, $dtype);\n\n      const out = webglBackend.makeTensorInfo(outShape, $dtype);\n      const outData = webglBackend.texData.get(out.dataId);\n      outData.values = outValues;\n      return out;\n    }\n\n    const shouldUsePackedProgram =\n        env().getBool('WEBGL_PACK_BINARY_OPERATIONS') &&\n        packedOpSnippet != null;\n    let program: BinaryOpProgram|BinaryOpPackedProgram;\n    if (shouldUsePackedProgram) {\n      program = new BinaryOpPackedProgram(\n          packedOpSnippet, a.shape, b.shape, checkOutOfBounds);\n    } else {\n      program = new BinaryOpProgram(opSnippet, a.shape, b.shape);\n    }\n\n    return webglBackend.runWebGLProgram(program, [a, b], $dtype);\n  };\n}\n\nexport function mapActivationToShaderProgram(\n    activation: backend_util.Activation, packed = false): string {\n  if (activation === 'linear') {\n    if (packed) {\n      return unary_packed_op.LINEAR;\n    }\n    return unary_op.LINEAR;\n  } else if (activation === 'relu') {\n    if (packed) {\n      return unary_packed_op.RELU;\n    }\n    return unary_op.RELU;\n  } else if (activation === 'elu') {\n    if (packed) {\n      return unary_packed_op.ELU;\n    }\n    return unary_op.ELU;\n  } else if (activation === 'relu6') {\n    if (packed) {\n      return unary_packed_op.RELU6;\n    }\n    return unary_op.RELU6;\n  } else if (activation === 'prelu') {\n    if (packed) {\n      return PRELU_PACKED;\n    }\n    return PRELU;\n  } else if (activation === 'leakyrelu') {\n    if (packed) {\n      return LEAKYRELU_PACKED;\n    }\n    return LEAKYRELU;\n  } else if (activation === 'sigmoid') {\n    if (packed) {\n      return unary_packed_op.SIGMOID;\n    }\n    return unary_op.SIGMOID;\n  }\n  throw new Error(`Activation ${\n      activation} has not been implemented for the WebGL backend.`);\n}\n"]}