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crypto: vmx - comply with ABIs that specify vrsave as reserved.

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It gives significant improvements ( ~+15%) on some modes.

These code has been adopted from OpenSSL project in collaboration
with the original author (Andy Polyakov <[email protected]>).

Signed-off-by: Paulo Flabiano Smorigo <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Paulo Flabiano Smorigo authored and Herbert Xu committed 2016-05-10 17:49:21 +08:00
1 parent 9e5c9fe4cb
commit 5ca5573820
1 file changed
+20
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drivers/crypto/vmx/ppc-xlate.pl
+20
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@@ -139,6 +139,26 @@ my $vmr = sub {
" 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
sub vsxmem_op {
my ($f, $vrt, $ra, $rb, $op) = @_;