From 76177aa280494bb36d7a0bcbda1078d4db717020 Mon Sep 17 00:00:00 2001 From: Ali Labbene Date: Mon, 9 Dec 2019 11:25:19 +0100 Subject: Official ARM version: v4.5 --- Documentation/DSP/html/group___basic_abs.html | 334 ++++++++++++++++++++++++++ 1 file changed, 334 insertions(+) create mode 100644 Documentation/DSP/html/group___basic_abs.html (limited to 'Documentation/DSP/html/group___basic_abs.html') diff --git a/Documentation/DSP/html/group___basic_abs.html b/Documentation/DSP/html/group___basic_abs.html new file mode 100644 index 0000000..3fe2979 --- /dev/null +++ b/Documentation/DSP/html/group___basic_abs.html @@ -0,0 +1,334 @@ + + + + + +Vector Absolute Value +CMSIS-DSP: Vector Absolute Value + + + + + + + + + + + + + + + +
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CMSIS-DSP +  Version 1.4.7 +
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CMSIS DSP Software Library
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+Functions
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Vector Absolute Value
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Basic Math Functions
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+Functions

void arm_abs_f32 (float32_t *pSrc, float32_t *pDst, uint32_t blockSize)
 Floating-point vector absolute value.
 
void arm_abs_q15 (q15_t *pSrc, q15_t *pDst, uint32_t blockSize)
 Q15 vector absolute value.
 
void arm_abs_q31 (q31_t *pSrc, q31_t *pDst, uint32_t blockSize)
 Q31 vector absolute value.
 
void arm_abs_q7 (q7_t *pSrc, q7_t *pDst, uint32_t blockSize)
 Q7 vector absolute value.
 
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Description

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Computes the absolute value of a vector on an element-by-element basis.

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+    pDst[n] = abs(pSrc[n]),   0 <= n < blockSize.        
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The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer. There are separate functions for floating-point, Q7, Q15, and Q31 data types.

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Function Documentation

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void arm_abs_f32 (float32_t * pSrc,
float32_t * pDst,
uint32_t blockSize 
)
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Parameters
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[in]*pSrcpoints to the input buffer
[out]*pDstpoints to the output buffer
[in]blockSizenumber of samples in each vector
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Returns
none.
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Examples:
arm_signal_converge_example_f32.c.
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References blockSize.

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Referenced by main().

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void arm_abs_q15 (q15_t * pSrc,
q15_t * pDst,
uint32_t blockSize 
)
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Parameters
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[in]*pSrcpoints to the input buffer
[out]*pDstpoints to the output buffer
[in]blockSizenumber of samples in each vector
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Returns
none.
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Scaling and Overflow Behavior:

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The function uses saturating arithmetic. The Q15 value -1 (0x8000) will be saturated to the maximum allowable positive value 0x7FFF.
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References __SIMD32_CONST, and blockSize.

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void arm_abs_q31 (q31_t * pSrc,
q31_t * pDst,
uint32_t blockSize 
)
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Parameters
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[in]*pSrcpoints to the input buffer
[out]*pDstpoints to the output buffer
[in]blockSizenumber of samples in each vector
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Returns
none.
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Scaling and Overflow Behavior:

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The function uses saturating arithmetic. The Q31 value -1 (0x80000000) will be saturated to the maximum allowable positive value 0x7FFFFFFF.
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References blockSize.

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void arm_abs_q7 (q7_t * pSrc,
q7_t * pDst,
uint32_t blockSize 
)
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Parameters
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[in]*pSrcpoints to the input buffer
[out]*pDstpoints to the output buffer
[in]blockSizenumber of samples in each vector
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Returns
none.
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Conditions for optimum performance
Input and output buffers should be aligned by 32-bit
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Scaling and Overflow Behavior:

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The function uses saturating arithmetic. The Q7 value -1 (0x80) will be saturated to the maximum allowable positive value 0x7F.
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References blockSize.

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+ + + + -- cgit