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