vpaes-ppc.pl: fix bug in IV handling and comply with ABI.

diff --git a/crypto/aes/asm/vpaes-ppc.pl b/crypto/aes/asm/vpaes-ppc.pl
index 84e4fdbc23ab7c3907096debe3126a48570a45f8..7ee3f2abdf71b71451a0b6a412c598e11c613dbf 100644 (file)
--- a/crypto/aes/asm/vpaes-ppc.pl
+++ b/crypto/aes/asm/vpaes-ppc.pl
@@ -304,7 +304,6 @@ Lenc_entry:
 
        bl      _vpaes_encrypt_preheat
 
-       lvx     v0, 0, $inp
        neg     r8, $inp                # prepare for unaligned access
        lvsl    $keyperm, 0, $key
         lvsr   $outperm, 0, $out
@@ -488,7 +487,6 @@ Ldec_entry:
 
        bl      _vpaes_decrypt_preheat
 
-       lvx     v0, 0, $inp
        neg     r8, $inp                # prepare for unaligned access
        lvsl    $keyperm, 0, $key
         lvsr   $outperm, 0, $out
@@ -545,14 +543,12 @@ Ldec_entry:
        mfspr   r7, 256
        mtspr   256, r6                 # preserve all AltiVec registers
 
-       neg     r8, r31                 # load [potentially unaligned] iv
+       lvx     v24, 0, r31             # load [potentially unaligned] iv
        li      r9, 15
-       lvx     v24, 0, r31
-       lvsr    $inpperm, 0, r8         # -ivp
+       lvsl    $inpperm, 0, r31
        lvx     v25, r9, r31
        vperm   v24, v24, v25, $inpperm
 
-       lvx     v0, 0, $inp
        neg     r8, $inp                # prepare for unaligned access
         vxor   v7, v7, v7
        lvsl    $keyperm, 0, $key
@@ -619,11 +615,12 @@ Lcbc_done:
        vsel    v1, $outhead, v1, $outmask
        stvx    v1, 0, $out
 
-       lvsr    $outperm, 0, r31        # write [potentially unaligned] iv
+       neg     r8, r31                 # write [potentially unaligned] iv
+       lvsl    $outperm, 0, r8
        li      r6, 15
        vnor    $outmask, v7, v7        # 0xff..ff
        vperm   $outmask, v7, $outmask, $outperm
-       lvx     $outhead, 0, $out
+       lvx     $outhead, 0, r31
        vperm   v24, v24, v24, $outperm # rotate
        vsel    v0, $outhead, v24, $outmask
        lvx     v1, r6, r31
@@ -647,7 +644,7 @@ ___
 }\f
 {
 my ($inp,$bits,$out)=map("r$_",(3..5));
-my $dir="cr3";
+my $dir="cr1";
 my ($invlo,$invhi,$iptlo,$ipthi,$rcon) = map("v$_",(10..13,24));
 
 $code.=<<___;