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6 .TH vsincospi_ 3MVEC "14 Dec 2007" "SunOS 5.11" "Vector Math Library Functions"
8 vsincospi_, vsincospif_ \- vector sincospi functions
12 cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-lmvec\fR [ \fIlibrary\fR\&.\|.\|. ]
14 \fBvoid\fR \fBvsincospi_\fR(\fBint *\fR\fIn\fR, \fBdouble * restrict\fR \fIx\fR, \fBint *\fR\fIstridex\fR,
15 \fBdouble * restrict\fR \fIs\fR, \fBint *\fR\fIstrides\fR, \fBdouble * restrict\fR \fIc\fR,
16 \fBint *\fR\fIstridec\fR);
21 \fBvoid\fR \fBvsincospif_\fR(\fBint *\fR\fIn\fR, \fBfloat * restrict\fR \fIx\fR, \fBint *\fR\fIstridex\fR,
22 \fBfloat * restrict\fR \fIs\fR, \fBint *\fR\fIstrides\fR, \fBfloat * restrict\fR \fIc\fR,
23 \fBint *\fR\fIstridec\fR);
29 These functions evaluate both \fBsinpi\fR(\fIx\fR) and \fBcospi\fR(\fIx\fR),
30 defined by \fBsinpi\fR(\fIx\fR) = \fBsin\fR(\c
34 * \fIx\fR) and \fBcospi\fR(\fIx\fR) = \fBcos\fR(\c
38 * \fIx\fR), for an entire vector of values at once. The first parameter
39 specifies the number of values to compute. Subsequent parameters specify the
40 argument and result vectors. Each vector is described by a pointer to the first
41 element and a stride, which is the increment between successive elements.
44 Specifically, \fBvsincospi_\fR(\fIn\fR, \fIx\fR, \fIsx\fR, \fIs\fR, \fIss\fR,
45 \fIc\fR, \fIsc\fR) simultaneously computes \fIs\fR[\fIi\fR * *\fIss\fR] =
46 \fBsinpi\fR(\fIx\fR[\fIi\fR * *\fIsx\fR]) and \fIc\fR[\fIi\fR * *\fIsc\fR] =
47 \fBcospi\fR(\fIx\fR[\fIi\fR * *\fIsx\fR]) for each \fIi\fR = 0, 1, ...,
48 *\fIn\fR - 1. The \fBvsincosf_()\fR function performs the same computation for
49 single precision data.
52 Non-exceptional results are accurate to within a unit in the last place.
56 The element count *\fIn\fR must be greater than zero. The strides for the
57 argument and result arrays can be arbitrary integers, but the arrays themselves
58 must not be the same or overlap. A zero stride effectively collapses an entire
59 vector into a single element. A negative stride causes a vector to be accessed
60 in descending memory order, but note that the corresponding pointer must still
61 point to the first element of the vector to be used; if the stride is negative,
62 this will be the highest-addressed element in memory. This convention differs
63 from the Level 1 BLAS, in which array parameters always refer to the
64 lowest-addressed element in memory even when negative increments are used.
67 These functions assume that the default round-to-nearest rounding direction
68 mode is in effect. On x86, these functions also assume that the default
69 round-to-64-bit rounding precision mode is in effect. The result of calling a
70 vector function with a non-default rounding mode in effect is undefined.
73 These functions handle special cases and exceptions in the spirit of IEEE 754.
79 \fBsinpi\fR(NaN), \fBcospi\fR(NaN) are NaN,
85 \fBsinpi\fR(\(+-0) is \(+-0,
91 \fBsinpi\fR(\(+-Inf), \fBcospi\fR(\(+-Inf) are NaN, and an invalid operation
96 An application wanting to check for exceptions should call
97 \fBfeclearexcept\fR(\fBFE_ALL_EXCEPT\fR) before calling these functions. On
98 return, if \fBfetestexcept\fR(\fBFE_INVALID\fR | \fBFE_DIVBYZERO\fR |
99 \fBFE_OVERFLOW\fR | \fBFE_UNDERFLOW\fR) is non-zero, an exception has been
100 raised. The application can then examine the result or argument vectors for
101 exceptional values. Some vector functions can raise the inexact exception even
102 if all elements of the argument array are such that the numerical results are
107 See \fBattributes\fR(5) for descriptions of the following attributes:
116 ATTRIBUTE TYPE
\aATTRIBUTE VALUE
118 Interface Stability
\aCommitted
126 \fBfeclearexcept\fR(3M), \fBfetestexcept\fR(3M), \fBattributes\fR(5)