Vector Subtraction

Collaboration diagram for Vector Subtraction:

Macros
#define	Q7_MAX   (q7_t)0x7F
	U8 vector subtraction. More...
#define	Q7_MIN   (q7_t)0x80

Functions
void	tpt_sub_f32 (f32_t *__restrict aOutData, const f32_t *__restrict aInDataA, const f32_t *__restrict aInDataB, uint32_t aCount)
	Floating-point vector subtraction. More...
void	tpt_sub_f64 (f64_t *__restrict aOutData, const f64_t *__restrict aInDataA, const f64_t *__restrict aInDataB, uint32_t aCount)
	Floating-point vector subtraction. More...
void	tpt_sub_q15 (q15_t *__restrict aOutData, const q15_t *__restrict aInDataA, const q15_t *__restrict aInDataB, uint32_t aCount)
	Q15 vector subtraction. More...
void	tpt_sub_q31 (q31_t *__restrict aOutData, const q31_t *__restrict aInDataA, const q31_t *__restrict aInDataB, uint32_t aCount)
	Q31 vector subtraction. More...
void	tpt_sub_q7 (q7_t *__restrict aOutData, const q7_t *__restrict aInDataA, const q7_t *__restrict aInDataB, uint32_t aCount)
	Q7 vector subtraction. More...
static q31_t	sat_q31_to_q7 (q31_t src)
void	tpt_sub_u8_q7 (q7_t *__restrict aOutData, const uint8_t *__restrict aInDataA, const uint8_t *__restrict aInDataB, uint32_t aCount)
	U8 vector subtraction. More...

Detailed Description

Element-by-element subtraction of two vectors.

    aOutData[n] = aInDataA[n] - aInDataB[n],   0 <= n < aCount.
  

There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Macro Definition Documentation

Q7_MAX

#define Q7_MAX   (q7_t)0x7F

U8 vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

Ouput results will be saturated in Q7 range [0x80 0x7F].

Q7_MIN

#define Q7_MIN   (q7_t)0x80

Function Documentation

sat_q31_to_q7()

static q31_t sat_q31_to_q7 ( q31_t  src )

inlinestatic

tpt_sub_f32()

void tpt_sub_f32	(	f32_t *__restrict	aOutData,
		const f32_t *__restrict	aInDataA,
		const f32_t *__restrict	aInDataB,
		uint32_t	aCount
	)

Floating-point vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

tpt_sub_f64()

void tpt_sub_f64	(	f64_t *__restrict	aOutData,
		const f64_t *__restrict	aInDataA,
		const f64_t *__restrict	aInDataB,
		uint32_t	aCount
	)

Floating-point vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

tpt_sub_q15()

void tpt_sub_q15	(	q15_t *__restrict	aOutData,
		const q15_t *__restrict	aInDataA,
		const q15_t *__restrict	aInDataB,
		uint32_t	aCount
	)

Q15 vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.

tpt_sub_q31()

void tpt_sub_q31	(	q31_t *__restrict	aOutData,
		const q31_t *__restrict	aInDataA,
		const q31_t *__restrict	aInDataB,
		uint32_t	aCount
	)

Q31 vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.

tpt_sub_q7()

void tpt_sub_q7	(	q7_t *__restrict	aOutData,
		const q7_t *__restrict	aInDataA,
		const q7_t *__restrict	aInDataB,
		uint32_t	aCount
	)

Q7 vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] are saturated.

tpt_sub_u8_q7()

void tpt_sub_u8_q7	(	q7_t *__restrict	aOutData,
		const uint8_t *__restrict	aInDataA,
		const uint8_t *__restrict	aInDataB,
		uint32_t	aCount
	)

U8 vector subtraction.

Parameters

[out]	aOutData	points to output vector
[in]	aInDataA	points to first input vector
[in]	aInDataB	points to second input vector
[in]	aCount	number of samples in each vector

Returns

none