'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
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.TH getisax 2 "7 bNov 2007" "SunOS 5.11" "System Calls"
.SH NAME
getisax \- extract valid instruction set extensions
.SH SYNOPSIS
.LP
.nf
#include <sys/auxv.h>

\fBuint_t\fR \fBgetisax\fR(\fBuint32_t *\fR\fIarray\fR, \fBuint_t\fR \fIn\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBgetisax()\fR function sets the vector \fIarray\fR of \fIn\fR 32-bit
integers to contain the bits from the \fBAV\fR_\fIxxx\fR_\fIyyy\fR namespace of
the given instruction set architecture.
.sp
.LP
Values for \fBAV\fR_\fIxxx\fR_\fIyyy\fR for SPARC and SPARCV9, and their
associated descriptions, can be found in \fB<sys/auxv_SPARC.h>\fR.
.sp
.LP
Values for \fBAV\fR_\fIxxx\fR_\fIyyy\fR for i386 and AMD64, and their
associated descriptions, can be found in \fB<sys/auxv_386.h>\fR.
.SH RETURN VALUES
.sp
.LP
The \fBgetisax()\fR function returns the number of array elements that contain
non-zero values.
.SH EXAMPLES
.LP
\fBExample 1 \fRUse \fBgetisax()\fR to determine if the SSE2 instruction set is
present.
.sp
.LP
In the following example, if the message is written, the SSE2 instruction set
is present and fully supportred by the operating system.

.sp
.in +2
.nf
uint_t ui;
 
(void) getisax(&ui, 1);
 
if (ui & AV_386_SSE2)
        printf("SSE2 instruction set extension is present.\en");
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBisainfo\fR(1), \fBld\fR(1), \fBpargs\fR(1), \fBattributes\fR(5)
.sp
.LP
\fILinker and Libraries Guide\fR
.sp
.LP
\fISPARC Assembly Language Reference Manual\fR
.sp
.LP
\fIx86 Assembly Language Reference Manual\fR