| VCFx_acos | VCDx_acos | VCEx_acos |
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| Function | arcus cosinus function |
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| Syntax C/C++ | #include <VFmath.h>
int VF_acos( fVector Y, fVector X, ui size );
int VFx_acos( fVector Y, fVector X, ui size, float A, float B, float C ); |
| C++ VecObj | #include <OptiVec.h>
int vector<T>::acos( const vector<T>& X );
int vector<T>::x_acos( const vector<T>& X, const T& A, const T& B, const T& C ); |
| Pascal/Delphi | uses VFmath;
function VF_acos( Y, X:fVector; size:UIntSize ): IntBool;
function VFx_acos( Y, X:fVector; size:UIntSize; A, B, C:Single ): IntBool; |
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| CUDA function C/C++ | #include <cudaVFmath.h>
int cudaVF_acos( fVector d_Y, fVector d_X, ui size );
int cudaVFx_acos( fVector d_Y, fVector d_X, ui size, float A, float B, float C );
int cusdVFx_acos( fVector d_Y, fVector d_X, ui size, float *d_A, float *d_B, float *d_C );
int VFcu_acos( fVector h_Y, fVector h_X, ui size );
int VFxcu_acos( fVector h_Y, fVector h_X, ui size, float A, float B, float C );
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| CUDA function Pascal/Delphi | uses VFmath;
function cudaVF_acos( d_Y, d_X:fVector; size:UIntSize ): IntBool;
function cudaVFx_acos( d_Y, d_X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
function cusdVFx_acos( d_Y, d_X:fVector; size:UIntSize; d_A, d_B, d_C:PSingle ): IntBool;
function VFcu_acos( h_Y, h_X:fVector; size:UIntSize ): IntBool;
function VFxcu_acos( h_Y, h_X:fVector; size:UIntSize; A, B, C:Single ): IntBool;
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| Description | simple versions: Yi = arccos ( Xi )
expanded versions: Yi = C * arccos (A*Xi + B ) |
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| Error handling | Real versions: DOMAIN errors occur for arguments outside the range −1 ≤ Xi ≤ +1; the default result is NAN ("not-a-number").
The complex versions should be error-proof as long as the parameter C in the expanded versions is not already near the OVERFLOW limit; this very rare error is neither detected nor handled. |
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| Return value | FALSE (0), if no error occurred, otherwise TRUE (non-zero). |
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