|
void | arm_scale_f16 (const float16_t *pSrc, float16_t scale, float16_t *pDst, uint32_t blockSize) |
| Multiplies a floating-point vector by a scalar. More...
|
|
void | arm_scale_f32 (const float32_t *pSrc, float32_t scale, float32_t *pDst, uint32_t blockSize) |
| Multiplies a floating-point vector by a scalar. More...
|
|
void | arm_scale_f64 (const float64_t *pSrc, float64_t scale, float64_t *pDst, uint32_t blockSize) |
| Multiplies a floating-point vector by a scalar. More...
|
|
void | arm_scale_q15 (const q15_t *pSrc, q15_t scaleFract, int8_t shift, q15_t *pDst, uint32_t blockSize) |
| Multiplies a Q15 vector by a scalar. More...
|
|
void | arm_scale_q31 (const q31_t *pSrc, q31_t scaleFract, int8_t shift, q31_t *pDst, uint32_t blockSize) |
| Multiplies a Q31 vector by a scalar. More...
|
|
void | arm_scale_q7 (const q7_t *pSrc, q7_t scaleFract, int8_t shift, q7_t *pDst, uint32_t blockSize) |
| Multiplies a Q7 vector by a scalar. More...
|
|
Multiply a vector by a scalar value. For floating-point data, the algorithm used is:
pDst[n] = pSrc[n] * scale, 0 <= n < blockSize.
In the fixed-point Q7, Q15, and Q31 functions, scale
is represented by a fractional multiplication scaleFract
and an arithmetic shift shift
. The shift allows the gain of the scaling operation to exceed 1.0. The algorithm used with fixed-point data is:
pDst[n] = (pSrc[n] * scaleFract) << shift, 0 <= n < blockSize.
The overall scale factor applied to the fixed-point data is
scale = scaleFract * 2^shift.
The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer.
void arm_scale_f16 |
( |
const float16_t * |
pSrc, |
|
|
float16_t |
scale, |
|
|
float16_t * |
pDst, |
|
|
uint32_t |
blockSize |
|
) |
| |
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scale | scale factor to be applied |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scale | scale factor to be applied |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scale | scale factor to be applied |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
void arm_scale_q15 |
( |
const q15_t * |
pSrc, |
|
|
q15_t |
scaleFract, |
|
|
int8_t |
shift, |
|
|
q15_t * |
pDst, |
|
|
uint32_t |
blockSize |
|
) |
| |
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scaleFract | fractional portion of the scale value |
[in] | shift | number of bits to shift the result by |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
- Scaling and Overflow Behavior
- The input data
*pSrc
and scaleFract
are in 1.15 format. These are multiplied to yield a 2.30 intermediate result and this is shifted with saturation to 1.15 format.
void arm_scale_q31 |
( |
const q31_t * |
pSrc, |
|
|
q31_t |
scaleFract, |
|
|
int8_t |
shift, |
|
|
q31_t * |
pDst, |
|
|
uint32_t |
blockSize |
|
) |
| |
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scaleFract | fractional portion of the scale value |
[in] | shift | number of bits to shift the result by |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
- Scaling and Overflow Behavior
- The input data
*pSrc
and scaleFract
are in 1.31 format. These are multiplied to yield a 2.62 intermediate result and this is shifted with saturation to 1.31 format.
void arm_scale_q7 |
( |
const q7_t * |
pSrc, |
|
|
q7_t |
scaleFract, |
|
|
int8_t |
shift, |
|
|
q7_t * |
pDst, |
|
|
uint32_t |
blockSize |
|
) |
| |
- Parameters
-
[in] | pSrc | points to the input vector |
[in] | scaleFract | fractional portion of the scale value |
[in] | shift | number of bits to shift the result by |
[out] | pDst | points to the output vector |
[in] | blockSize | number of samples in each vector |
- Returns
- none
- Scaling and Overflow Behavior
- The input data
*pSrc
and scaleFract
are in 1.7 format. These are multiplied to yield a 2.14 intermediate result and this is shifted with saturation to 1.7 format.