wgblas
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    Function sscal

    • Scales a single-precision vector by a constant: x = alpha * x

      import { init, cleanup } from "wgblas";
      import { sscal } from "wgblas/sscal";
      import { randomFloat32Array } from "wgblas/random";

      const device = await init();

      const n = 10;
      const alpha = 2.0;
      const x = randomFloat32Array(n, -10, 10);

      console.log("before:", x);
      const result = await sscal(device, n, alpha, x, 1);
      console.log("after: ", result);
      if (typeof process !== "undefined") cleanup();

      Parameters

      • device: GPUDevice

        GPUDevice from init()

      • n: number

        number of elements to scale (must be a positive integer)

      • alpha: number

        scalar multiplier

      • x: Float32Array

        Float32Array input/output vector

      • incx: number

        stride for x (must be a positive integer)

      Returns Promise<
          | Float32Array<ArrayBufferLike>
          | { gpuTimeMs: number; result: Float32Array },
      >

    • Scales a single-precision vector by a constant: x = alpha * x

      import { init, cleanup } from "wgblas";
      import { sscal } from "wgblas/sscal";
      import { saxpy } from "wgblas/saxpy";
      import { GpuVector } from "wgblas/classes/GpuVector";
      import { randomFloat32Array } from "wgblas/random";

      const device = await init();

      const n = 10;
      const alpha = 2.0;
      const x = randomFloat32Array(n, -10, 10);
      const y = randomFloat32Array(n, -10, 10);

      const xGpu = GpuVector.from(x);
      const yGpu = GpuVector.from(y);

      console.log("x: ", x);
      console.log("y: ", y);

      await sscal(device, n, alpha, xGpu, 1);
      await saxpy(device, n, 1.0, xGpu, 1, yGpu, 1);

      const result = await yGpu.read();
      console.log("result (2x + y):", result);

      xGpu.destroy();
      yGpu.destroy();
      if (typeof process !== "undefined") cleanup();

      Parameters

      • device: GPUDevice

        GPUDevice from init()

      • n: number

        number of elements to scale (must be a positive integer)

      • alpha: number

        scalar multiplier

      • x: GpuVector

        GpuVector input/output vector (mutated in place)

      • incx: number

        stride for x (must be a positive integer)

      Returns Promise<{} | { gpuTimeMs: number }>