GpuLaneIndex

The lane of the running thread within its iteration.

声明

语法

GpuLaneIndex(ttype type, expr? value)

参数

Argument	描述
type	the type of the expression, an integer.
value	always nil: the lane is only known when the kernel runs.

返回值

The value of the expression.

描述

In a kernel whose layout has lanes (see gpu_kernel_layout), each iteration runs on lanes consecutive threads of one SIMD-group. The thread index (GpuThreadIndex) numbers the iterations, and GpuLaneIndex tells apart the lanes of one: it counts from zero to lanes - 1. A loop whose iterations the lanes share starts at its first iteration plus the lane and steps by lanes iterations. Only such a kernel has one.

示例

(GpuLaneIndex
  :type (Integer
    :kind 4
  )
  :value nil
)

也可以看看

GpuLaneIndex, GpuLaneBroadcast, GpuLaneBarrier, gpu_kernel_layout