Method getUserCode

tfjs-backend-webgpu/src/mirror_pad_webgpu.ts:50–88

()

  }

  getUserCode(): string {
    const rank = this.xShape.length;
    // The length of paddings are same with the rank of the input tensor.
    const start = this.xShape.map((_, i) => `uniforms.pad${i}[0]`).join(',');
    const end = this.xShape
                    .map(
                        (_, i) => `uniforms.pad${i}[0] + uniforms.xShape${
                            rank > 1 ? `[${i}]` : ''}`)
                    .join(',');

    const shaderStart = rank === 1 ? 'start' : 'start[i]';
    const shaderEnd = rank === 1 ? 'end' : 'end[i]';
    const shaderOutC = rank === 1 ? 'outC' : 'outC[i]';
    const dtype = getCoordsDataType(rank);
    const unpackedCoords = rank > 1 ?
        ['coords[0]', 'coords[1]', 'coords[2]', 'coords[3]'].slice(0, rank) :
        'coords';

    return `
      ${main('index')} {
        if (index < uniforms.size) {
          let start = ${dtype}(${start});
          let end = ${dtype}(${end});
          var outC = getCoordsFromIndex(index);
          for (var i = 0; i < ${rank}; i = i + 1) {
            if (${shaderOutC} < ${shaderStart}) {
              ${shaderOutC} = ${shaderStart} * 2 - ${shaderOutC} - ${
        this.offset};
            } else if(${shaderOutC} >= ${shaderEnd}) {
              ${shaderOutC} = (${shaderEnd} - 1) * 2 - ${shaderOutC} + ${
        this.offset};
            }
          }
          let coords = outC - start;
          setOutputAtIndex(index, getX(${unpackedCoords}));
        }
      }
    `;
  }
}