Convert
此类函数转换源向量中的每个元素的数据类型，结果保存在目的向量中。
带_S后缀的函数根据scale值对结果值进行缩放。如果转换后的结果超出输出数据范围，则将达到饱和。
对float16_t型数据进行转换时函数不支持HMPP_RND_FINANCIAL舍入模式。
函数接口声明如下：
- 整型转整型的操作：
HmppResult HMPPS_Convert_24u32u(const uint8_t *src, uint32_t *dst, int32_t len);
HmppResult HMPPS_Convert_8s8u(const int8_t *src, uint8_t *dst, int32_t len);
HmppResult HMPPS_Convert_8s16s(const int8_t *src, int16_t *dst, int32_t len);
HmppResult HMPPS_Convert_16s32s(const int16_t *src, int32_t *dst, int32_t len);
HmppResult HMPPS_Convert_24s32s(const uint8_t *src, int32_t *dst, int32_t len);
HmppResult HMPPS_Convert_32s16s(const int32_t *src, int16_t *dst, int32_t len);
- 整型转浮点的操作：
HmppResult HMPPS_Convert_24u32f(const uint8_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_16s16f(const int16_t *src, float16_t *dst, int32_t len, HmppRoundMode roundMode);
HmppResult HMPPS_Convert_8u32f(const uint8_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_8s32f(const int8_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_16u32f(const uint16_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_16s32f(const int16_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_24s32f(const uint8_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_32s32f(const int32_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_32s64f(const int32_t *src, double *dst, int32_t len);
HmppResult HMPPS_Convert_64s64f(const int64_t *src, double *dst, int32_t len);
- 浮点转浮点的操作：
HmppResult HMPPS_Convert_32f16f(const float *src, float16_t *dst, int32_t len, HmppRoundMode roundMode);
HmppResult HMPPS_Convert_32f64f(const float *src, double *dst, int32_t len);
HmppResult HMPPS_Convert_16f32f(const float16_t *src, float *dst, int32_t len);
HmppResult HMPPS_Convert_64f32f(const double *src, float *dst, int32_t len);
- 有缩放的整型转整型操作：
HmppResult HMPPS_Convert_8u8s_S(const uint8_t *src, int8_t *dst, int32_t len, HmppRoundMode rndMode, double scale)
HmppResult HMPPS_Convert_16s8s_S(const int16_t *src, int8_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32u24u_S(const uint32_t *src, uint8_t *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_32s16s_S(const int32_t *src, int16_t *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_32s24s_S(const int32_t *src, uint8_t *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_64s32s_S(const int64_t *src, int32_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
- 有缩放的整型转浮点操作：
HmppResult HMPPS_Convert_16s32f_S(const int16_t *src, float *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_16s64f_S(const int16_t *src, double *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_32s32f_S(const int32_t *src, float *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_32s64f_S(const int32_t *src, double *dst, int32_t len, double scale);
- 有缩放的浮点转整型操作：
HmppResult HMPPS_Convert_32f8u_S(const float *src, uint8_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32f8s_S(const float *src, int8_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32f16u_S(const float *src, uint16_t *dst, int32_t len,HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32f16s_S(const float *src, int16_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32f32s_S(const float *src, int32_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f8u_S(const double *src, uint8_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f8s_S(const double *src, int8_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f16u_S(const double *src, uint16_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f16s_S(const double *src, int16_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f32s_S(const double *src, int32_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_64f64s_S(const double *src, int64_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_16f16s_S(const float16_t *src, int16_t *dst, int32_t len, HmppRoundMode rndMode, double scale);
HmppResult HMPPS_Convert_32f24u_S(const float *src, uint8_t *dst, int32_t len, double scale);
HmppResult HMPPS_Convert_32f24s_S(const float *src, uint8_t *dst, int32_t len, double scale);
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 |
len |
源向量长度。 |
(0, INT_MAX]或[3, INT_MAX] |
输入 |
scale |
缩放因数。 |
(0,INF)且输入为2^n |
输入 |
rndMode |
舍入模式。定义在枚举类型HmppRoundMode中，请参见枚举类型。 |
枚举体HmppRoundMode元素：
|
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这两个入参中存在空指针。 |
HMPP_STS_SIZE_ERR |
len小于或等于0或len小于3。 |
HMPP_STS_NOT_SUPPORT |
当前数据类型转换不支持参数传入的round mode。 |
HMPP_STS_SCALE_ERR |
scale不在(0,INF)范围内或输入为nan。 |
示例
void ConvertExample()
{
const int8_t src[BUFFER_SIZE_S] = { 123, 32, 0, -123, 3, -128, 32, -127, 64 };
uint8_t dst[BUFFER_SIZE_S] = {0};
int32_t i;
HmppResult result = HMPPS_Convert_8s8u(src, dst, BUFFER_SIZE_S);
printf("result = %d \ndst =", result);
for(i = 0; i < BUFFER_SIZE_S; i++){
printf(" %u ", dst[i]);
}
printf("\n");
}
运行结果：
result = 0 dst = 123 32 0 0 3 0 32 0 64