vc_log_(3mvec) [opensolaris man page]
vz_log_(3MVEC) Vector Math Library Functions vz_log_(3MVEC) NAME
vz_log_, vc_log_ - vector complex logarithm functions SYNOPSIS
cc [ flag... ] file... -lmvec [ library... ] void vz_log_(int *n, double complex * restrict z, int *stridez, double _complex * restrict w, int *stridew); void vc_log_(int *n, float complex * restrict z, int *stridez, float complex * restrict w, int *stridew); DESCRIPTION
These functions evaluate the complex function log(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. Specifically, vz_log_(n, z, sz, w, sw) computes w[i * *sw] = log(z[i * *sz]) for each i = 0, 1, ..., *n - 1. The vc_log_() function per- forms the same computation for single precision data. These functions are not guaranteed to deliver results that are identical to the results of the clog(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 clog(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 clog(). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
clog(3M), attributes(5) SunOS 5.11 14 Dec 2007 vz_log_(3MVEC)
Check Out this Related Man Page
vatan2_(3MVEC) Vector Math Library Functions vatan2_(3MVEC) NAME
vatan2_, vatan2f_ - vector atan2 functions SYNOPSIS
cc [ flag... ] file... -lmvec [ library... ] void vatan2_(int *n, double * restrict y, int *stridey, double * restrict x, int *stridex, double * restrict z, int *stridez); void vatan2f_(int *n, float * restrict y, int *stridey, float * restrict x, int *stridex, float * restrict z, int *stridez); DESCRIPTION
These functions evaluate the function atan2(y, x) 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. Specifically, vatan2_(n, y, sy, x, sx, z, sz) computes z[i * *sz] = atan2(y[i * *sy], x[i * *sx]) for each i = 0, 1, ..., *n - 1. The vatan2f_() 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 atan2(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 atan2() functions when c99 MATHERREXCEPT conventions are in effect. See atan2(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
atan2(3M), feclearexcept(3M), fetestexcept(3M), attributes(5) SunOS 5.11 14 Dec 2007 vatan2_(3MVEC)