Arg
Arg
Computes the argument of vector elements.
Syntax
IppStatus ippsArg_32fc_A11(const Ipp32fc*
pSrc
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsArg_32fc_A21(const Ipp32fc*
pSrc
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsArg_32fc_A24(const Ipp32fc*
pSrc
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsArg_64fc_A26(const Ipp64fc*
pSrc
, Ipp64f*
pDst
, Ipp32s
len
);
IppStatus ippsArg_64fc_A50(const Ipp64fc*
pSrc
, Ipp64f*
pDst
, Ipp32s
len
);
IppStatus ippsArg_64fc_A53(const Ipp64fc*
pSrc
, Ipp64f*
pDst
, Ipp32s
len
);
Include Files
ippvm.h
Domain Dependencies
Headers:
ippcore.h
Libraries:
ippcore.lib
Parameters
- pSrc
- Pointer to the source vector.
- pDst
- Pointer to the destination vector.
- len
- Number of elements in the vectors.
Description
This function computes the argument of the vector
pSrc
elements and stores the
result in the corresponding element of the vector pDst
.For single precision data:
function flavor
ippsArg_32fc_A11
guarantees 11 correctly rounded bits of significand,
or at least 3 exact decimal digits;function flavor
ippsArg_32fc_A21
guarantees 21 correctly rounded bits of significand,
or 4 ulps, or about 6 exact decimal digits;function flavor
ippsArg_32fc_A24
guarantees 24 correctly rounded bits of significand,
including the implied bit, with the maximum guaranteed error within 1 ulp.For double precision data:
function flavor
ippsArg_64fc_A26
guarantees 26 correctly rounded bits of significand,
or 6.7E+7 ulps, or approximately 8 exact decimal digits;function flavor
ippsArg_64fc_A50
guarantees 50 correctly rounded bits of
significand,or 4 ulps, or approximately 15 exact decimal digits;function flavor
ippsArg_64fc_A53
guarantees 53 correctly rounded bits of significand,
including the implied bit, with the maximum guaranteed error within 1 ulp.The computation is performed as follows:
pDst
[n] = φ
(pSrc1
[n])0 ≤ n <
.len
Return Values
- ippStsNoErr
- Indicates no error.
- ippStsNullPtrErr
- Indicates an error whenpSrc1,pSrc2orpDstpointer isNULL.
- ippStsSizeErr
- Indicates an error whenlenis less than or equal to 0.
Example
The example below shows how to use the function
ippsArg
.IppStatus ippsArg_32fc_A24_sample(void)
{
const Ipp32fc x[2] = {{+2.885,-1.809}, {-0.543,-2.809}};
Ipp32fc y[2];
IppStatus st = ippsArg_32fc_A24( x, y, 2 );
printf(" ippsArg_32fc_A24:\n");
printf(" x = %+.3f%+.3f*i %+.3f%+.3f*i \n", x[0].re, x[0].im, x[1].re, x[1].im);
printf(" y = %+.3f %+.3f% \n", y[0], y[1]);
return st;
}
Output results:
ippsArg_32fc_A24:
x = +2.885-1.809*i -0.543-2.809*i
y = -0.560 -1.762