---
title: ThresholdAbs
description: "对向量中所有元素的绝对值做设阈操作。比较操作由接口函数名指定，包括："
url: https://www.hikunpeng.com/document/detail/zh/kunpengboostkithistory/240RC2/accel/kunpengaccel_hmpp_06_0102.html
sourcePath: /source/zh/kunpengboostkithistory/240RC2/accel/kunpengaccel_hmpp_06_0102.html
indexId: 38c58855fd17955cd3fe88cb259dd50479c7e8bc89b5c0954e4466a83d3265ae77
---
# ThresholdAbs

对向量中所有元素的绝对值做设阈操作。比较操作由接口函数名指定，包括：

- HMPPS_Threshold_LTAbs
  小于操作，即level是向量的下边界。

- HMPPS_Threshold_GTAbs
  大于操作，即level是向量的上边界。


函数接口声明如下：

- 整型数的操作：
  HmppResult HMPPS_Threshold_LTAbs_16s(const int16_t* src, int16_t* dst, int32_t len, int16_t level);

  HmppResult HMPPS_Threshold_LTAbs_32s(const int32_t* src, int32_t* dst, int32_t len, int32_t level);

  HmppResult HMPPS_Threshold_GTAbs_16s(const int16_t* src, int16_t* dst, int32_t len, int16_t level);

  HmppResult HMPPS_Threshold_GTAbs_32s(const int32_t* src, int32_t* dst, int32_t len, int32_t level);

- 浮点数的操作：
  HmppResult HMPPS_Threshold_LTAbs_32f(const float* src, float* dst, int32_t len, float level);

  HmppResult HMPPS_Threshold_LTAbs_64f(const double* src, double* dst, int32_t len, double level);

  HmppResult HMPPS_Threshold_GTAbs_32f(const float* src, float* dst, int32_t len, float level);

  HmppResult HMPPS_Threshold_GTAbs_64f(const double* src, double* dst, int32_t len, double level);

- 整型数的原址操作：
  HmppResult HMPPS_Threshold_LTAbs_16s_I(int16_t* srcDst, int32_t len, int16_t level);

  HmppResult HMPPS_Threshold_LTAbs_32s_I(int32_t* srcDst, int32_t len, int32_t level);

  HmppResult HMPPS_Threshold_GTAbs_16s_I(int16_t* srcDst, int32_t len, int16_t level);

  HmppResult HMPPS_Threshold_GTAbs_32s_I(int32_t* srcDst, int32_t len, int32_t level);

- 浮点数的原址操作：
  HmppResult HMPPS_Threshold_LTAbs_32f_I(float* srcDst, int32_t len, float level);

  HmppResult HMPPS_Threshold_LTAbs_64f_I(double* srcDst, int32_t len, double level);

  HmppResult HMPPS_Threshold_GTAbs_32f_I(float* srcDst, int32_t len, float level);

  HmppResult HMPPS_Threshold_GTAbs_64f_I(double* srcDst, int32_t len, double level)


#### 参数

| 参数名 | 描述 | 取值范围 | 输入/输出 |
| --- | --- | --- | --- |
| src | 指向源向量的指针。 | 非空 | 输入 |
| dst | 指向目的向量的指针。 | 非空 | 输出 |
| srcDst | 指向原址操作向量的指针。 | 非空 | 输入/输出 |
| len | 向量长度。 | (0, INT\_MAX] | 输入 |
| level | 阈值。 | 不限，视类型而定 | 输入 |


#### 返回值

- 成功：返回HMPP_STS_NO_ERR。
- 失败：返回错误码。


#### 错误码

| 错误码 | 描述 |
| --- | --- |
| HMPP\_STS\_NULL\_PTR\_ERR | src、dst、srcDst这几个入参中存在空指针。 |
| HMPP\_STS\_SIZE\_ERR | len小于或等于0。 |
| HMPP\_STS\_THRESH\_NEG\_LEVEL\_ERR | 阈值小于0。 |


#### 示例

```
#define  BUFFER_SIZE_T 20
void ThresholdAbsExample(void)
{
float src[BUFFER_SIZE_T] = {1.46, 9.40, 10.73, 5.90, 5.74, -0.96, 8.55,  -1.39, 1.71,  2.32, 9.99, 5.42, 10.58, 5.20, 9.12, 0.86,  10.13, 5.94,  -0.62, 9.19};
float dst[BUFFER_SIZE_T] = {0.00};
HmppResult result;
int32_t i;
result = HMPPS_Threshold_LTAbs_32f(src, dst, BUFFER_SIZE_T, 3.14);
printf("Threshold1: result = %d.\ndst1 = ", result);
if (result != HMPP_STS_NO_ERR) {
return;
}
for (i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %.2f   ", dst[i]);
}
HMPPS_Zero_32f(dst, BUFFER_SIZE_T);
result = HMPPS_Threshold_GTAbs_32f(src, dst, BUFFER_SIZE_T, 3.14);
if (result != HMPP_STS_NO_ERR) {
return;
}
printf("\nThreshold2: result = %d.\ndst2 = ", result);
for (i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %.2f   ", dst[i]);
}
}
```

运行结果：

```
Threshold1: result = 0.
dst1 = 3.14    9.40    10.73    5.90    5.74    -3.14    8.55    -3.14    3.14    3.14    9.99    5.42    10.58    5.20    9.12    3.14    10.13    5.94    -3.14    9.19
Threshold2: result = 0.
dst2 = 1.46    3.14    3.14    3.14    3.14    -0.96    3.14    -1.39    1.71    2.32    3.14    3.14    3.14    3.14    3.14    0.86    3.14    3.14    -0.62    3.14
```