:-'Generic Commit'

dropshell-tool/openssl-1.1.1w/crypto/bn/asm/s390x-gf2m.pl

@@ -0,0 +1,228 @@
+#! /usr/bin/env perl
+# Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (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@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/.
+# ====================================================================
+#
+# May 2011
+#
+# The module implements bn_GF2m_mul_2x2 polynomial multiplication used
+# in bn_gf2m.c. It's kind of low-hanging mechanical port from C for
+# the time being... gcc 4.3 appeared to generate poor code, therefore
+# the effort. And indeed, the module delivers 55%-90%(*) improvement
+# on heaviest ECDSA verify and ECDH benchmarks for 163- and 571-bit
+# key lengths on z990, 30%-55%(*) - on z10, and 70%-110%(*) - on z196.
+# This is for 64-bit build. In 32-bit "highgprs" case improvement is
+# even higher, for example on z990 it was measured 80%-150%. ECDSA
+# sign is modest 9%-12% faster. Keep in mind that these coefficients
+# are not ones for bn_GF2m_mul_2x2 itself, as not all CPU time is
+# burnt in it...
+#
+# (*)	gcc 4.1 was observed to deliver better results than gcc 4.3,
+#	so that improvement coefficients can vary from one specific
+#	setup to another.
+
+$flavour = shift;
+
+if ($flavour =~ /3[12]/) {
+        $SIZE_T=4;
+        $g="";
+} else {
+        $SIZE_T=8;
+        $g="g";
+}
+
+while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {}
+open STDOUT,">$output";
+
+$stdframe=16*$SIZE_T+4*8;
+
+$rp="%r2";
+$a1="%r3";
+$a0="%r4";
+$b1="%r5";
+$b0="%r6";
+
+$ra="%r14";
+$sp="%r15";
+
+@T=("%r0","%r1");
+@i=("%r12","%r13");
+
+($a1,$a2,$a4,$a8,$a12,$a48)=map("%r$_",(6..11));
+($lo,$hi,$b)=map("%r$_",(3..5)); $a=$lo; $mask=$a8;
+
+$code.=<<___;
+.text
+
+.type	_mul_1x1,\@function
+.align	16
+_mul_1x1:
+	lgr	$a1,$a
+	sllg	$a2,$a,1
+	sllg	$a4,$a,2
+	sllg	$a8,$a,3
+
+	srag	$lo,$a1,63			# broadcast 63rd bit
+	nihh	$a1,0x1fff
+	srag	@i[0],$a2,63			# broadcast 62nd bit
+	nihh	$a2,0x3fff
+	srag	@i[1],$a4,63			# broadcast 61st bit
+	nihh	$a4,0x7fff
+	ngr	$lo,$b
+	ngr	@i[0],$b
+	ngr	@i[1],$b
+
+	lghi	@T[0],0
+	lgr	$a12,$a1
+	stg	@T[0],`$stdframe+0*8`($sp)	# tab[0]=0
+	xgr	$a12,$a2
+	stg	$a1,`$stdframe+1*8`($sp)	# tab[1]=a1
+	 lgr	$a48,$a4
+	stg	$a2,`$stdframe+2*8`($sp)	# tab[2]=a2
+	 xgr	$a48,$a8
+	stg	$a12,`$stdframe+3*8`($sp)	# tab[3]=a1^a2
+	 xgr	$a1,$a4
+
+	stg	$a4,`$stdframe+4*8`($sp)	# tab[4]=a4
+	xgr	$a2,$a4
+	stg	$a1,`$stdframe+5*8`($sp)	# tab[5]=a1^a4
+	xgr	$a12,$a4
+	stg	$a2,`$stdframe+6*8`($sp)	# tab[6]=a2^a4
+	 xgr	$a1,$a48
+	stg	$a12,`$stdframe+7*8`($sp)	# tab[7]=a1^a2^a4
+	 xgr	$a2,$a48
+
+	stg	$a8,`$stdframe+8*8`($sp)	# tab[8]=a8
+	xgr	$a12,$a48
+	stg	$a1,`$stdframe+9*8`($sp)	# tab[9]=a1^a8
+	 xgr	$a1,$a4
+	stg	$a2,`$stdframe+10*8`($sp)	# tab[10]=a2^a8
+	 xgr	$a2,$a4
+	stg	$a12,`$stdframe+11*8`($sp)	# tab[11]=a1^a2^a8
+
+	xgr	$a12,$a4
+	stg	$a48,`$stdframe+12*8`($sp)	# tab[12]=a4^a8
+	 srlg	$hi,$lo,1
+	stg	$a1,`$stdframe+13*8`($sp)	# tab[13]=a1^a4^a8
+	 sllg	$lo,$lo,63
+	stg	$a2,`$stdframe+14*8`($sp)	# tab[14]=a2^a4^a8
+	 srlg	@T[0],@i[0],2
+	stg	$a12,`$stdframe+15*8`($sp)	# tab[15]=a1^a2^a4^a8
+
+	lghi	$mask,`0xf<<3`
+	sllg	$a1,@i[0],62
+	 sllg	@i[0],$b,3
+	srlg	@T[1],@i[1],3
+	 ngr	@i[0],$mask
+	sllg	$a2,@i[1],61
+	 srlg	@i[1],$b,4-3
+	xgr	$hi,@T[0]
+	 ngr	@i[1],$mask
+	xgr	$lo,$a1
+	xgr	$hi,@T[1]
+	xgr	$lo,$a2
+
+	xg	$lo,$stdframe(@i[0],$sp)
+	srlg	@i[0],$b,8-3
+	ngr	@i[0],$mask
+___
+for($n=1;$n<14;$n++) {
+$code.=<<___;
+	lg	@T[1],$stdframe(@i[1],$sp)
+	srlg	@i[1],$b,`($n+2)*4`-3
+	sllg	@T[0],@T[1],`$n*4`
+	ngr	@i[1],$mask
+	srlg	@T[1],@T[1],`64-$n*4`
+	xgr	$lo,@T[0]
+	xgr	$hi,@T[1]
+___
+	push(@i,shift(@i)); push(@T,shift(@T));
+}
+$code.=<<___;
+	lg	@T[1],$stdframe(@i[1],$sp)
+	sllg	@T[0],@T[1],`$n*4`
+	srlg	@T[1],@T[1],`64-$n*4`
+	xgr	$lo,@T[0]
+	xgr	$hi,@T[1]
+
+	lg	@T[0],$stdframe(@i[0],$sp)
+	sllg	@T[1],@T[0],`($n+1)*4`
+	srlg	@T[0],@T[0],`64-($n+1)*4`
+	xgr	$lo,@T[1]
+	xgr	$hi,@T[0]
+
+	br	$ra
+.size	_mul_1x1,.-_mul_1x1
+
+.globl	bn_GF2m_mul_2x2
+.type	bn_GF2m_mul_2x2,\@function
+.align	16
+bn_GF2m_mul_2x2:
+	stm${g}	%r3,%r15,3*$SIZE_T($sp)
+
+	lghi	%r1,-$stdframe-128
+	la	%r0,0($sp)
+	la	$sp,0(%r1,$sp)			# alloca
+	st${g}	%r0,0($sp)			# back chain
+___
+if ($SIZE_T==8) {
+my @r=map("%r$_",(6..9));
+$code.=<<___;
+	bras	$ra,_mul_1x1			# a1·b1
+	stmg	$lo,$hi,16($rp)
+
+	lg	$a,`$stdframe+128+4*$SIZE_T`($sp)
+	lg	$b,`$stdframe+128+6*$SIZE_T`($sp)
+	bras	$ra,_mul_1x1			# a0·b0
+	stmg	$lo,$hi,0($rp)
+
+	lg	$a,`$stdframe+128+3*$SIZE_T`($sp)
+	lg	$b,`$stdframe+128+5*$SIZE_T`($sp)
+	xg	$a,`$stdframe+128+4*$SIZE_T`($sp)
+	xg	$b,`$stdframe+128+6*$SIZE_T`($sp)
+	bras	$ra,_mul_1x1			# (a0+a1)·(b0+b1)
+	lmg	@r[0],@r[3],0($rp)
+
+	xgr	$lo,$hi
+	xgr	$hi,@r[1]
+	xgr	$lo,@r[0]
+	xgr	$hi,@r[2]
+	xgr	$lo,@r[3]
+	xgr	$hi,@r[3]
+	xgr	$lo,$hi
+	stg	$hi,16($rp)
+	stg	$lo,8($rp)
+___
+} else {
+$code.=<<___;
+	sllg	%r3,%r3,32
+	sllg	%r5,%r5,32
+	or	%r3,%r4
+	or	%r5,%r6
+	bras	$ra,_mul_1x1
+	rllg	$lo,$lo,32
+	rllg	$hi,$hi,32
+	stmg	$lo,$hi,0($rp)
+___
+}
+$code.=<<___;
+	lm${g}	%r6,%r15,`$stdframe+128+6*$SIZE_T`($sp)
+	br	$ra
+.size	bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
+.string	"GF(2^m) Multiplication for s390x, CRYPTOGAMS by <appro\@openssl.org>"
+___
+
+$code =~ s/\`([^\`]*)\`/eval($1)/gem;
+print $code;
+close STDOUT or die "error closing STDOUT: $!";