vsincos_(3mvec) [opensolaris man page]

vsincos_(3MVEC) 					   Vector Math Library Functions					   vsincos_(3MVEC)

NAME

       vsincos_, vsincosf_ - vector sincos functions

SYNOPSIS

       cc [ flag... ] file... -lmvec [ library... ]

       void vsincos_(int *n, double * restrict x, int *stridex,
	    double * restrict s, int *strides, double * restrict c,
	    int *stridec);

       void vsincosf_(int *n, float * restrict x, int *stridex,
	    float * restrict s, int *strides, float * restrict c,
	    int *stridec);

DESCRIPTION

       These  functions evaluate both sin(x) and cos(x) for an entire vector of values at once. The first parameter specifies the number of values
       to compute. Subsequent parameters specify the argument and result vectors. Each vector is described by a pointer to the first element and a
       stride, which is the increment between successive elements.

       Specifically,  vsincos_(n,  x,  sx, s, ss, c, sc) simultaneously computes s[i * *ss] = sin(x[i * *sx]) and c[i * *sc] = cos(x[i * *sx]) for
       each i = 0, 1, ..., *n - 1. The	vsincosf_() function performs the same computation for single precision data.

       These functions are not guaranteed to deliver results that are identical to the results of the sincos(3M) functions given  the  same  argu-
       ments. Non-exceptional results, however, are accurate to within a unit in the last place.

USAGE

       The  element  count  *n must be greater than zero. The strides for the argument and result arrays can be arbitrary integers, but the arrays
       themselves must not be the same or overlap. A zero stride effectively collapses an entire vector into a single element. A  negative  stride
       causes a vector to be accessed in descending memory order, but note that the corresponding pointer must still point to the first element of
       the vector to be used; if the stride is negative, this will be the highest-addressed element in memory. This convention	differs  from  the
       Level 1 BLAS, in which array parameters always refer to the lowest-addressed element in memory even when negative increments are used.

       These functions assume that the default round-to-nearest rounding direction mode is in effect. On x86, these functions also assume that the
       default round-to-64-bit rounding precision mode is in effect. The result of calling a vector function with a non-default rounding  mode	in
       effect is undefined.

       These functions handle special cases and exceptions in the same way as the sin() and cos() functions when c99 MATHERREXCEPT conventions are
       in effect. See sin(3M) and cos(3M) for the results for special cases.

       An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before  calling	these  functions.  On  return,	if
       fetestexcept(FE_INVALID	|  FE_DIVBYZERO  | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. The application can then
       examine the result or argument vectors for exceptional values. Some vector functions can raise the inexact exception even if  all  elements
       of the argument array are such that the numerical results are exact.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cos(3M), sin(3M), sincos(3M), feclearexcept(3M), fetestexcept(3M), attributes(5)

SunOS 5.11							    14 Dec 2007 						   vsincos_(3MVEC)