'\" te
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.TH ISAINFO 1 "Feb 8, 2007"
.SH NAME
isainfo \- describe instruction set architectures
.SH SYNOPSIS
.LP
.nf
\fBisainfo\fR [ [\fB-v\fR] [\fB-b\fR | \fB-n\fR | \fB-k\fR] | [\fB-x\fR]]
.fi

.SH DESCRIPTION
.sp
.LP
The \fBisainfo\fR utility is used to identify various attributes of the
instruction set architectures supported on the currently running system. Among
the questions it can answer are whether 64-bit applications are supported, or
whether the running kernel uses 32-bit or 64-bit device drivers.
.sp
.LP
When invoked with no options, \fBisainfo\fR prints the names of the native
instruction sets for applications supported by the current version of the
operating system. These are a subset of the list returned by \fBisalist\fR(1).
The subset corresponds to the basic applications environments supported by the
currently running system.
.SH OPTIONS
.sp
.LP
The following options are supported:
.sp
.ne 2
.na
\fB\fB-b\fR\fR
.ad
.RS 6n
Prints the number of bits in the address space of the native instruction set.
.RE

.sp
.ne 2
.na
\fB\fB-k\fR\fR
.ad
.RS 6n
Prints the name of the instruction set(s) used by the operating system kernel
components such as device drivers and \fBSTREAMS\fR modules.
.RE

.sp
.ne 2
.na
\fB\fB-n\fR\fR
.ad
.RS 6n
Prints the name of the native instruction set used by portable applications
supported by the current version of the operating system.
.RE

.sp
.ne 2
.na
\fB\fB-v\fR\fR
.ad
.RS 6n
When used with the \fB-b\fR, \fB-k\fR or \fB-n\fR options, prints more detailed
information.
.RE

.sp
.ne 2
.na
\fB\fB-x\fR\fR
.ad
.RS 6n
Prints instruction extensions to the native ABI which are supported by the
platform.
.RE

.SH EXAMPLES
.LP
\fBExample 1 \fRInvoking \fBisainfo\fR on a 32-bit x86 Platform
.sp
.LP
The following example invokes \fBisainfo\fR on a 32-bit x86 platform:

.sp
.in +2
.nf
example% isainfo -v
32-bit i386 applications

example% isainfo -k
i386
.fi
.in -2
.sp

.LP
\fBExample 2 \fRInvoking \fBisainfo\fR on a System Running the 64-bit Operating
System on a 64-bit SPARC Processor
.sp
.LP
The following example invokes \fBisainfo\fR on a system running the 64-bit
operating system on a 64-bit SPARC processor:

.sp
.in +2
.nf
example% isainfo
sparcv9 sparc
example% isainfo -n
sparcv9
example% isainfo -v
64-bit sparcv9 applications
32-bit sparc applications
example% isainfo -vk
64-bit sparcv9 kernel modules
.fi
.in -2
.sp

.LP
\fBExample 3 \fRInvoking \fBisainfo\fR \fB-x\fR on an AMD Opteron CPU
.sp
.LP
The following example invokes \fBisainfo\fR with the \fB-x\fR option on an AMD
Opteron CPU:

.sp
.in +2
.nf
example% isainfo -x
i386: fpu tsc cx8 sep cmov mmx ammx a3dnow a3dnowx fxsr sse sse2 pause
.fi
.in -2
.sp

.SH EXIT STATUS
.sp
.ne 2
.na
\fBNon-zero\fR
.ad
.RS 12n
Options are not specified correctly, or the command is unable to recognize
attributes of the system on which it is running. An error message is printed to
\fBstderr\fR.
.RE

.SH SEE ALSO
.sp
.LP
.BR isalist (1),
.BR uname (1),
.BR getisax (2),
.BR sysinfo (2),
.BR attributes (7),
.BR isalist (7),
.BR psrinfo (8)