---
title: Mul
description: "向量与向量相乘。"
url: https://www.hikunpeng.com/document/detail/zh/kunpengboostkithistory/2200/accel/kunpengaccel_hmpp_06_0080.html
sourcePath: /source/zh/kunpengboostkithistory/2200/accel/kunpengaccel_hmpp_06_0080.html
indexId: d81d8cdebf878461b8994a790b3e1e00f398ab0bbb7d4779e9f00e5a2801efb675
---
# Mul

向量与向量相乘。

函数接口声明如下：

- 没有缩放的整型数的操作：
  HmppResult HMPPS_Mul_8u16u(const uint8_t *src1, const uint8_t *src2, uint16_t *dst, int32_t len)；

  HmppResult HMPPS_Mul_16s(const int16_t *src1, const int16_t *src2, int16_t *dst, int32_t len);

- 没有缩放的浮点数的操作：
  HmppResult HMPPS_Mul_16s32f(const int16_t *src1, const int16_t *src2, float *dst, int32_t len);

  HmppResult HMPPS_Mul_32f(const float *src1, const float *src2, float *dst, int32_t len);

  HmppResult HMPPS_Mul_32f32fc(const float *src1, const Hmpp32fc *src2, Hmpp32fc *dst, int32_t len);

  HmppResult HMPPS_Mul_64f(const double *src1, const double *src2, double *dst, int32_t len);

  HmppResult HMPPS_Mul_32fc(const Hmpp32fc *src1, const Hmpp32fc *src2, Hmpp32fc *dst, int32_t len);

  HmppResult HMPPS_Mul_64fc(const Hmpp64fc *src1, const Hmpp64fc *src2, Hmpp64fc *dst, int32_t len);

- 有缩放的整型数的操作：
  HmppResult HMPPS_Mul_8u_S(const uint8_t *src1, const uint8_t *src2, uint8_t *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16u_S(const uint16_t *src1, const uint16_t *src2, uint16_t *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16s_S(const int16_t *src1, const int16_t *src2, int16_t *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16s32s_S(const int16_t *src1, const int16_t *src2, int32_t *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_32s_S(const int32_t *src1, const int32_t *src2, int32_t *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16sc_S(const Hmpp16sc *src1, const Hmpp16sc *src2, Hmpp16sc *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_32sc_S(const Hmpp32sc *src1, const Hmpp32sc *src2, Hmpp32sc *dst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16u16s_S(const uint16_t *src1, const int16_t *src2, int16_t *dst, int32_t len, double scale);

- 没有缩放的整型数的原址操作：
  HmppResult HMPPS_Mul_16s_I(const int16_t *src, int16_t *srcDst, int32_t len);

- 没有缩放的浮点数的原址操作：
  HmppResult HMPPS_Mul_32f_I(const float *src, float *srcDst, int32_t len);

  HmppResult HMPPS_Mul_64f_I(const double *src, double *srcDst, int32_t len);

  HmppResult HMPPS_Mul_32fc_I(const Hmpp32fc *src, Hmpp32fc *srcDst, int32_t len);

  HmppResult HMPPS_Mul_32f32fc_I(const float *src, Hmpp32fc *srcDst, int32_t len);

  HmppResult HMPPS_Mul_64fc_I(const Hmpp64fc *src, Hmpp64fc *srcDst, int32_t len);

- 有缩放的整型数原址操作：
  HmppResult HMPPS_Mul_8u_IS(const uint8_t *src, uint8_t *srcDst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16u_IS(const uint16_t *src, uint16_t *srcDst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16s_IS(const int16_t *src, int16_t *srcDst, int32_t len, double scale);

  HmppResult HMPPS_Mul_32s_IS(const int32_t *src, int32_t *srcDst, int32_t len, double scale);

  HmppResult HMPPS_Mul_16sc_IS(const Hmpp16sc *src, Hmpp16sc *srcDst, int32_t len, double scale);

  HmppResult HMPPS_Mul_32sc_IS(const Hmpp32sc *src, Hmpp32sc *srcDst, int32_t len, double scale);


#### 参数

| 参数名 | 描述 | 取值范围 | 输入/输出 |
| --- | --- | --- | --- |
| src1 | 指向第一个源向量的指针。 | 非空 | 输入 |
| src2 | 指向第二个源向量的指针。 | 非空 | 输入 |
| 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 |
| scale | 缩放因数。 | (0, inf)且为2n | 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 | src1、src2、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\_SCALE\_ERR | scale不在(0,INF)范围内或输入为nan。 |


#### 示例

```
#define BUFFER_SIZE_T 10
void MulExample(void)
{
uint8_t src1[BUFFER_SIZE_T] = {255, 0, 254, 0, 253, 1, 252, 2, 251, 3};
uint8_t src2[BUFFER_SIZE_T] = {2, 3, 1, 2, 6, 2, 2, 12, 2, 8};
uint8_t dst[BUFFER_SIZE_T];
(void)HMPPS_Zero_8u(dst, BUFFER_SIZE_T); // 数组初始化，将dst所有元素初始化为0.
HmppResult result = HMPPS_Mul_8u_S(src1, src2, dst, BUFFER_SIZE_T, 8.0);
printf("result = %d\n", result);
if (result != HMPP_STS_NO_ERR) {
return;
}
printf("dst =");
for (int i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %d", dst[i]);
}
printf("\n");
}
```

运行结果：

```
result = 0
dst = 64 0 32 0 190 0 63 3 63 3
```