X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fbn%2Fasm%2Fs390x-mont.pl;h=03fd15bbd2d82d67bb99e64d86a0c732e3b69e53;hb=a21314dbbc56cd30580123d74b3106a628540965;hp=9fd64e81eef36cbde53332d10743b934218530e5;hpb=0ab8fd58e1c3077c1e5e9057b3d73b73b99a843e;p=oweals%2Fopenssl.git

diff --git a/crypto/bn/asm/s390x-mont.pl b/crypto/bn/asm/s390x-mont.pl
index 9fd64e81ee..03fd15bbd2 100644
--- a/crypto/bn/asm/s390x-mont.pl
+++ b/crypto/bn/asm/s390x-mont.pl
@@ -1,7 +1,14 @@
-#!/usr/bin/env perl
+#! /usr/bin/env perl
+# Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
 
 # ====================================================================
-# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
+# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
 # project. The module is, however, dual licensed under OpenSSL and
 # CRYPTOGAMS licenses depending on where you obtain it. For further
 # details see http://www.openssl.org/~appro/cryptogams/.
@@ -44,7 +51,10 @@
 # On z990 it was measured to perform 2.6-2.2 times better than
 # compiler-generated code, less for longer keys...
 
-$flavour = shift;
+# $output is the last argument if it looks like a file (it has an extension)
+# $flavour is the first argument if it doesn't look like a file
+$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
+$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
 
 if ($flavour =~ /3[12]/) {
 	$SIZE_T=4;
@@ -54,8 +64,7 @@ if ($flavour =~ /3[12]/) {
 	$g="g";
 }
 
-while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
-open STDOUT,">$output";
+$output and open STDOUT,">$output";
 
 $stdframe=16*$SIZE_T+4*8;
 
@@ -138,7 +147,7 @@ $code.=<<___;
 	lghi	$NHI,0
 	alcgr	$NHI,$nhi
 
-	la	$j,8(%r0)	# j=1
+	la	$j,8		# j=1
 	lr	$count,$num
 
 .align	16
@@ -190,7 +199,7 @@ $code.=<<___;
 	lghi	$NHI,0
 	alcgr	$NHI,$nhi
 
-	la	$j,8(%r0)	# j=1
+	la	$j,8		# j=1
 	lr	$count,$num
 
 .align	16
@@ -234,7 +243,7 @@ $code.=<<___;
 	la	$ap,$stdframe($sp)
 	ahi	$num,1		# restore $num, incidentally clears "borrow"
 
-	la	$j,0(%r0)
+	la	$j,0
 	lr	$count,$num
 .Lsub:	lg	$alo,0($j,$ap)
 	lg	$nlo,0($j,$np)
@@ -245,16 +254,16 @@ $code.=<<___;
 	brct	$count,.Lsub
 	lghi	$ahi,0
 	slbgr	$AHI,$ahi	# handle upmost carry
+	lghi	$NHI,-1
+	xgr	$NHI,$AHI
 
-	ngr	$ap,$AHI
-	lghi	$np,-1
-	xgr	$np,$AHI
-	ngr	$np,$rp
-	ogr	$ap,$np		# ap=borrow?tp:rp
-
-	la	$j,0(%r0)
+	la	$j,0
 	lgr	$count,$num
-.Lcopy:	lg	$alo,0($j,$ap)		# copy or in-place refresh
+.Lcopy:	lg	$ahi,$stdframe($j,$sp)	# conditional copy
+	lg	$alo,0($j,$rp)
+	ngr	$ahi,$AHI
+	ngr	$alo,$NHI
+	ogr	$alo,$ahi
 	_dswap	$alo
 	stg	$j,$stdframe($j,$sp)	# zap tp
 	stg	$alo,0($j,$rp)
@@ -274,4 +283,4 @@ foreach (split("\n",$code)) {
 	s/_dswap\s+(%r[0-9]+)/sprintf("rllg\t%s,%s,32",$1,$1) if($SIZE_T==4)/e;
 	print $_,"\n";
 }
-close STDOUT;
+close STDOUT or die "error closing STDOUT: $!";