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perlasm/ppc-xlate.pl: comply with ABIs that specify vrsave as reserved.

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RT#4162

Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Andy Polyakov 2015-12-02 14:32:08 +01:00
parent 1bbea40384
commit b5516cfbd6
1 changed files with 20 additions and 0 deletions
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20
crypto/perlasm/ppc-xlate.pl
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@ -151,6 +151,26 @@ my $vmr = sub {
" vor $vx,$vy,$vy"; " vor $vx,$vy,$vy";
}; };
# Some ABIs specify vrsave, special-purpose register #256, as reserved
# for system use.
my $no_vrsave = ($flavour =~ /aix|linux64le/);
my $mtspr = sub {
my ($f,$idx,$ra) = @_;
if ($idx == 256 && $no_vrsave) {
" or $ra,$ra,$ra";
} else {
" mtspr $idx,$ra";
}
};
my $mfspr = sub {
my ($f,$rd,$idx) = @_;
if ($idx == 256 && $no_vrsave) {
" li $rd,-1";
} else {
" mfspr $rd,$idx";
}
};
# PowerISA 2.06 stuff # PowerISA 2.06 stuff
sub vsxmem_op { sub vsxmem_op {
my ($f, $vrt, $ra, $rb, $op) = @_; my ($f, $vrt, $ra, $rb, $op) = @_;