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

NAME

       vz_pow_, vc_pow_ - vector complex power functions

SYNOPSIS

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

       void vz_pow_(int *n, double complex * restrict z,
	    int *stridez, double complex * restrict w, int *stridew,
	    double complex * restrict u, int *strideu,
	    double * tmp);

       void vc_pow_(int *n, float complex * restrict z,
	    int *stridez, float complex * restrict w, int *stridew,
	    float complex * restrict u, int *strideu,
	    float * tmp);

DESCRIPTION

       These  functions evaluate the complex function z^w for an entire vector of values at once. The first parameter specifies the number of val-
       ues 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. The last argument is a pointer to scratch storage; this storage must be
       large enough to hold 3 * *n consecutive values of the real type corresponding to the complex type of the argument and result.

       Specifically, vz_pow_(n, z, sz, w, sw, u, su, tmp) computes u[i * *su] = (z[i * *sz])^(w[i * *sw]) for each i = 0, 1,  ...,  *n	-  1.  The
       vc_pow_() 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 cpow(3M) functions given the same arguments.

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.

       Unlike  the  c99  cpow(3M) functions, the vector complex exponential functions make no attempt to handle special cases and exceptions; they
       simply use textbook formulas to compute a complex exponential in terms of real elementary functions. As a result, these functions can raise
       different exceptions and/or deliver different results from cpow().

ATTRIBUTES

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

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

SEE ALSO

       cpow(3M), attributes(5)

SunOS 5.11							    14 Dec 2007 						    vz_pow_(3MVEC)