1#!/bin/sh
2
3# Check if the passed in (CAPABILITY_WORD) matches a value found in the
4# current hwcap aux vector.
5
6# return '0' to indicate the capability was found.
7# return '1' for not found, or any other error condition.
8
9CAPABILITY_WORD=$1
10
11# SANITY CHECK Begin:
12# These are potential hwcap values as found in the glibc dl-procinfo.c
13# sources as of July 2015.
14P_HWCAP_1=" vsx arch_2_06 power6x dfp pa6t arch_2_05 ic_snoop smt booke"
15P_HWCAP_2=" cellbe power5+ power5 power4 notb efpdouble efpsingle spe"
16P_HWCAP_3=" ucache 4xxmac mmu fpu altivec ppc601 ppc64 ppc32 "
17P_HWCAP2_1=" tar isel ebb dscr htm arch_2_07 "
18CAPABILITY_FOUND="no"
19for POTENTIAL_CAP in $P_HWCAP_1 $P_HWCAP_2 $P_HWCAP_3 $P_HWCAP2_1 ; do
20	if [ "x$CAPABILITY_WORD" = "x$POTENTIAL_CAP" ]; then
21		CAPABILITY_FOUND="yes"
22		break
23	fi
24done
25if [ x$CAPABILITY_FOUND = "xno" ]; then
26	echo "Warning: did not find $CAPABILITY_WORD in the potential capabilities list."
27	echo "         LD_SHOW_AUXV=1 /bin/true | grep ^AT_HWCAP "
28	echo "         Double-check that the input value [$CAPABILITY_WORD] is valid."
29fi
30# SANITY CHECK End
31
32# Capability Check Begin:
33LD_SHOW_AUXV=1 /bin/true | grep ^AT_HWCAP | grep -w $CAPABILITY_WORD 2>&1 > /dev/null
34if [ "$?" -eq "0" ]; then
35	#echo "found the capability"
36	exit 0
37elif [ "$?" -eq "2" ]; then
38	# echo "grep failure"
39	exit 1
40else
41	#echo "did not find the capability"
42	exit 1
43fi
44
45