aes/asm/aes-ppc.pl: add little-endian support.

Submitted by: Marcelo Cerri

diff --git a/crypto/aes/asm/aes-ppc.pl b/crypto/aes/asm/aes-ppc.pl
index 18138c2c8434ab5505c7187ca4fdb5aaf305e9ee..b38bce1b3b26b3a14fb86dde2ee0669c0d8cc491 100644 (file)
--- a/crypto/aes/asm/aes-ppc.pl
+++ b/crypto/aes/asm/aes-ppc.pl
@@ -45,6 +45,12 @@ if ($flavour =~ /64/) {
        $PUSH   ="stw";
 } else { die "nonsense $flavour"; }
 
+$LITTLE_ENDIAN=0;
+if ($flavour =~ /le$/) {
+       die "little-endian is 64-bit only: $flavour" if ($SIZE_T == 4);
+       $LITTLE_ENDIAN=1;
+}
+
 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 ( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
 ( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
@@ -361,17 +367,61 @@ $code.=<<___;
        bne     Lenc_unaligned
 
 Lenc_unaligned_ok:
+___
+$code.=<<___ if (!$LITTLE_ENDIAN);
        lwz     $s0,0($inp)
        lwz     $s1,4($inp)
        lwz     $s2,8($inp)
        lwz     $s3,12($inp)
+___
+$code.=<<___ if ($LITTLE_ENDIAN);
+       lwz     $t0,0($inp)
+       lwz     $t1,4($inp)
+       lwz     $t2,8($inp)
+       lwz     $t3,12($inp)
+       rotlwi  $s0,$t0,8
+       rotlwi  $s1,$t1,8
+       rotlwi  $s2,$t2,8
+       rotlwi  $s3,$t3,8
+       rlwimi  $s0,$t0,24,0,7
+       rlwimi  $s1,$t1,24,0,7
+       rlwimi  $s2,$t2,24,0,7
+       rlwimi  $s3,$t3,24,0,7
+       rlwimi  $s0,$t0,24,16,23
+       rlwimi  $s1,$t1,24,16,23
+       rlwimi  $s2,$t2,24,16,23
+       rlwimi  $s3,$t3,24,16,23
+___
+$code.=<<___;
        bl      LAES_Te
        bl      Lppc_AES_encrypt_compact
        $POP    $out,`$FRAME-$SIZE_T*19`($sp)
+___
+$code.=<<___ if ($LITTLE_ENDIAN);
+       rotlwi  $t0,$s0,8
+       rotlwi  $t1,$s1,8
+       rotlwi  $t2,$s2,8
+       rotlwi  $t3,$s3,8
+       rlwimi  $t0,$s0,24,0,7
+       rlwimi  $t1,$s1,24,0,7
+       rlwimi  $t2,$s2,24,0,7
+       rlwimi  $t3,$s3,24,0,7
+       rlwimi  $t0,$s0,24,16,23
+       rlwimi  $t1,$s1,24,16,23
+       rlwimi  $t2,$s2,24,16,23
+       rlwimi  $t3,$s3,24,16,23
+       stw     $t0,0($out)
+       stw     $t1,4($out)
+       stw     $t2,8($out)
+       stw     $t3,12($out)
+___
+$code.=<<___ if (!$LITTLE_ENDIAN);
        stw     $s0,0($out)
        stw     $s1,4($out)
        stw     $s2,8($out)
        stw     $s3,12($out)
+___
+$code.=<<___;
        b       Lenc_done
 
 Lenc_unaligned:
@@ -795,17 +845,61 @@ Lenc_compact_done:
        bne     Ldec_unaligned
 
 Ldec_unaligned_ok:
+___
+$code.=<<___ if (!$LITTLE_ENDIAN);
        lwz     $s0,0($inp)
        lwz     $s1,4($inp)
        lwz     $s2,8($inp)
        lwz     $s3,12($inp)
+___
+$code.=<<___ if ($LITTLE_ENDIAN);
+       lwz     $t0,0($inp)
+       lwz     $t1,4($inp)
+       lwz     $t2,8($inp)
+       lwz     $t3,12($inp)
+       rotlwi  $s0,$t0,8
+       rotlwi  $s1,$t1,8
+       rotlwi  $s2,$t2,8
+       rotlwi  $s3,$t3,8
+       rlwimi  $s0,$t0,24,0,7
+       rlwimi  $s1,$t1,24,0,7
+       rlwimi  $s2,$t2,24,0,7
+       rlwimi  $s3,$t3,24,0,7
+       rlwimi  $s0,$t0,24,16,23
+       rlwimi  $s1,$t1,24,16,23
+       rlwimi  $s2,$t2,24,16,23
+       rlwimi  $s3,$t3,24,16,23
+___
+$code.=<<___;
        bl      LAES_Td
        bl      Lppc_AES_decrypt_compact
        $POP    $out,`$FRAME-$SIZE_T*19`($sp)
+___
+$code.=<<___ if ($LITTLE_ENDIAN);
+       rotlwi  $t0,$s0,8
+       rotlwi  $t1,$s1,8
+       rotlwi  $t2,$s2,8
+       rotlwi  $t3,$s3,8
+       rlwimi  $t0,$s0,24,0,7
+       rlwimi  $t1,$s1,24,0,7
+       rlwimi  $t2,$s2,24,0,7
+       rlwimi  $t3,$s3,24,0,7
+       rlwimi  $t0,$s0,24,16,23
+       rlwimi  $t1,$s1,24,16,23
+       rlwimi  $t2,$s2,24,16,23
+       rlwimi  $t3,$s3,24,16,23
+       stw     $t0,0($out)
+       stw     $t1,4($out)
+       stw     $t2,8($out)
+       stw     $t3,12($out)
+___
+$code.=<<___ if (!$LITTLE_ENDIAN);
        stw     $s0,0($out)
        stw     $s1,4($out)
        stw     $s2,8($out)
        stw     $s3,12($out)
+___
+$code.=<<___;
        b       Ldec_done
 
 Ldec_unaligned: