GETISAX(2) System Calls GETISAX(2)
NAME
getisax - extract valid instruction set extensions
SYNOPSIS
#include <sys/auxv.h>
uint_t getisax(
uint32_t *array,
uint_t n);
DESCRIPTION
The
getisax() function sets the vector
array of
n 32-bit integers to
contain the bits from the
AV_
xxx_
yyy namespace of the given
instruction set architecture.
Values for
AV_
xxx_
yyy for SPARC and SPARCV9, and their associated
descriptions, can be found in
<sys/auxv_SPARC.h>.
Values for
AV_
xxx_
yyy for i386 and AMD64, and their associated
descriptions, can be found in
<sys/auxv_386.h>.
RETURN VALUES
The
getisax() function returns the number of array elements that
contain non-zero values.
EXAMPLES
Example 1: Use getisax() to determine if the SSE2 instruction set is
present.
In the following example, if the message is written, the SSE2
instruction set is present and fully supported by the operating
system.
uint_t ui;
(void) getisax(&ui, 1);
if (ui & AV_386_SSE2)
printf("SSE2 instruction set extension is present.\n");
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+
SEE ALSO
isainfo(1),
ld(1),
pargs(1),
attributes(7) Linker and Libraries Guide SPARC Assembly Language Reference Manual x86 Assembly Language Reference Manual November 7, 2007 GETISAX(2)
