aes/asm/aesp8-ppc.pl: improve [backward] portability.

Some of stone-age assembler can't cope with r0 in address. It's actually
sensible thing to do, because r0 is shunted to 0 in address arithmetic
and by refusing r0 assembler effectively makes you understand that.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit a54aba531327285f64cf13a909bc129e9f9d5970)

diff --git a/crypto/aes/asm/aesp8-ppc.pl b/crypto/aes/asm/aesp8-ppc.pl
index 3fdf1ecda0dcd771642017b4b8f2f519b9f4d999..b7e92f6538abfa767ebb7055abb4a9e580e6033b 100755 (executable)
--- a/crypto/aes/asm/aesp8-ppc.pl
+++ b/crypto/aes/asm/aesp8-ppc.pl
@@ -3011,7 +3011,7 @@ _aesp8_xts_enc5x:
         vxor           $twk0,$twk0,v31
 
        vcipher         $out0,$out0,v26
-       lvsr            $inpperm,r0,$taillen    # $in5 is no more
+       lvsr            $inpperm,0,$taillen     # $in5 is no more
        vcipher         $out1,$out1,v26
        vcipher         $out2,$out2,v26
        vcipher         $out3,$out3,v26