It gives significant improvements ( ~+15%) on some modes.
These code has been adopted from OpenSSL project in collaboration
with the original author (Andy Polyakov <appro@xxxxxxxxxxx>).
---
drivers/crypto/vmx/ppc-xlate.pl | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/crypto/vmx/ppc-xlate.pl b/drivers/crypto/vmx/ppc-xlate.pl
index b999733..9f4994c 100644
--- a/drivers/crypto/vmx/ppc-xlate.pl
+++ b/drivers/crypto/vmx/ppc-xlate.pl
@@ -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) = @_;
--
2.5.0
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