vz_exp_(3MVEC) Vector Math Library Functions vz_exp_(3MVEC)
NAME
vz_exp_, vc_exp_ - vector complex exponential functions
SYNOPSIS
cc [ flag... ] file... -lmvec [ library... ]
void vz_exp_(int *n, double complex * restrict z,
int *stridez, double complex * restrict w int *stridew,
double * tmp);
void vc_exp_(int *n, float complex * restrict z,
int *stridez, float complex * restrict w, int *stridew,
float * tmp);
DESCRIPTION
These functions evaluate the complex function exp(z) 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 ele-
ment 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 *n consecutive values of the real type corresponding to the complex type of the argument and result.
Specifically, vz_exp_(n, z, sz, w, sw, tmp) computes w[i * *sw] = exp(z[i * *sz]) for each i = 0, 1, ..., *n - 1. The vc_exp_() 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 cexp(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 cexp(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 cexp().
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
cexp(3M), attributes(5)
SunOS 5.11 14 Dec 2007 vz_exp_(3MVEC)
