---
title: UnaryRepeatParams
description: "UnaryRepeatParams为用于控制操作数地址步长的数据结构。结构体内包含操作数相邻迭代间相同DataBlock的地址步长，操作数同一迭代内不同DataBlock的地址步长等参数。"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/ascendcopapi/atlasascendc_api_07_0012.html
sourcePath: /source/zh/canncommercial/900/API/ascendcopapi/atlasascendc_api_07_0012.html
indexId: fe17c6118845dcaada91368ece45e30a7aead31ebe295906189a5e8ac0d08fc776
---
# UnaryRepeatParams

UnaryRepeatParams为用于控制操作数地址步长的数据结构。结构体内包含操作数相邻迭代间相同DataBlock的地址步长，操作数同一迭代内不同DataBlock的地址步长等参数。

相邻迭代间的地址步长参数说明请参考repeatStride(https://www.hiascend.comdocument/detail/zh/canncommercial/900/programug/Ascendcopdevg/atlas_ascendc_10_0022.html#ZH-CN_TOPIC_0000002562282205__zh-cn_topic_0000002267504656_zh-cn_topic_0000001764162593_section139459347420)；同一迭代内DataBlock的地址步长参数说明请参考dataBlockStride(https://www.hiascend.comdocument/detail/zh/canncommercial/900/programug/Ascendcopdevg/atlas_ascendc_10_0022.html#ZH-CN_TOPIC_0000002562282205__zh-cn_topic_0000002267504656_zh-cn_topic_0000001764162593_section2815124173416)。

结构体具体定义为：

```
const int32_t DEFAULT_BLK_NUM = 8;
const int32_t DEFAULT_BLK_STRIDE = 1;
const uint8_t DEFAULT_REPEAT_STRIDE = 8;

struct UnaryRepeatParams {
    __aicore__ UnaryRepeatParams() {}
    __aicore__ UnaryRepeatParams(const uint16_t dstBlkStrideIn, const uint16_t srcBlkStrideIn,
        const uint8_t dstRepStrideIn, const uint8_t srcRepStrideIn)
        : dstBlkStride(dstBlkStrideIn),
          srcBlkStride(srcBlkStrideIn),
          dstRepStride(dstRepStrideIn),
          srcRepStride(srcRepStrideIn)
    {}
    __aicore__ UnaryRepeatParams(const uint16_t dstBlkStrideIn, const uint16_t srcBlkStrideIn,
        const uint8_t dstRepStrideIn, const uint8_t srcRepStrideIn, const bool halfBlockIn)
        : dstBlkStride(dstBlkStrideIn),
          srcBlkStride(srcBlkStrideIn),
          dstRepStride(dstRepStrideIn),
          srcRepStride(srcRepStrideIn),
          halfBlock(halfBlockIn)
    {}
    uint32_t blockNumber = DEFAULT_BLK_NUM;
    uint16_t dstBlkStride = DEFAULT_BLK_STRIDE;
    uint16_t srcBlkStride = DEFAULT_BLK_STRIDE;
    uint8_t dstRepStride = DEFAULT_REPEAT_STRIDE;
    uint8_t srcRepStride = DEFAULT_REPEAT_STRIDE;
    bool repeatStrideMode = false;
    bool strideSizeMode = false;
    bool halfBlock = false;
};
```

其中，blockNumber，repeatStrideMode，strideSizeMode为保留参数，用户无需关心，使用默认值即可。halfBlock表示CastDeq指令的结果写入对应UB的上半（halfBlock = true）还是下半（halfBlock = false）部分。用户需要自行定义DataBlock Stride参数，包含dstBlkStride，srcBlkStride，以及Repeat Stride参数，包含dstRepStride，srcRepStride。