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diff --git a/crypto/bn/asm/s390x-mont.pl b/crypto/bn/asm/s390x-mont.pl
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-#!/usr/bin/env perl
-
-# ====================================================================
-# Written by Andy Polyakov <appro@fy.chalmers.se> 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/.
-# ====================================================================
-
-# April 2007.
-#
-# Performance improvement over vanilla C code varies from 85% to 45%
-# depending on key length and benchmark. Unfortunately in this context
-# these are not very impressive results [for code that utilizes "wide"
-# 64x64=128-bit multiplication, which is not commonly available to C
-# programmers], at least hand-coded bn_asm.c replacement is known to
-# provide 30-40% better results for longest keys. Well, on a second
-# thought it's not very surprising, because z-CPUs are single-issue
-# and _strictly_ in-order execution, while bn_mul_mont is more or less
-# dependent on CPU ability to pipe-line instructions and have several
-# of them "in-flight" at the same time. I mean while other methods,
-# for example Karatsuba, aim to minimize amount of multiplications at
-# the cost of other operations increase, bn_mul_mont aim to neatly
-# "overlap" multiplications and the other operations [and on most
-# platforms even minimize the amount of the other operations, in
-# particular references to memory]. But it's possible to improve this
-# module performance by implementing dedicated squaring code-path and
-# possibly by unrolling loops...
-
-# January 2009.
-#
-# Reschedule to minimize/avoid Address Generation Interlock hazard,
-# make inner loops counter-based.
-
-$mn0="%r0";
-$num="%r1";
-
-# int bn_mul_mont(
-$rp="%r2"; # BN_ULONG *rp,
-$ap="%r3"; # const BN_ULONG *ap,
-$bp="%r4"; # const BN_ULONG *bp,
-$np="%r5"; # const BN_ULONG *np,
-$n0="%r6"; # const BN_ULONG *n0,
-#$num="160(%r15)" # int num);
-
-$bi="%r2"; # zaps rp
-$j="%r7";
-
-$ahi="%r8";
-$alo="%r9";
-$nhi="%r10";
-$nlo="%r11";
-$AHI="%r12";
-$NHI="%r13";
-$count="%r14";
-$sp="%r15";
-
-$code.=<<___;
-.text
-.globl bn_mul_mont
-.type bn_mul_mont,\@function
-bn_mul_mont:
- lgf $num,164($sp) # pull $num
- sla $num,3 # $num to enumerate bytes
- la $bp,0($num,$bp)
-
- stg %r2,16($sp)
-
- cghi $num,16 #
- lghi %r2,0 #
- blr %r14 # if($num<16) return 0;
- cghi $num,128 #
- bhr %r14 # if($num>128) return 0;
-
- stmg %r3,%r15,24($sp)
-
- lghi $rp,-160-8 # leave room for carry bit
- lcgr $j,$num # -$num
- lgr %r0,$sp
- la $rp,0($rp,$sp)
- la $sp,0($j,$rp) # alloca
- stg %r0,0($sp) # back chain
-
- sra $num,3 # restore $num
- la $bp,0($j,$bp) # restore $bp
- ahi $num,-1 # adjust $num for inner loop
- lg $n0,0($n0) # pull n0
-
- lg $bi,0($bp)
- lg $alo,0($ap)
- mlgr $ahi,$bi # ap[0]*bp[0]
- lgr $AHI,$ahi
-
- lgr $mn0,$alo # "tp[0]"*n0
- msgr $mn0,$n0
-
- lg $nlo,0($np) #
- mlgr $nhi,$mn0 # np[0]*m1
- algr $nlo,$alo # +="tp[0]"
- lghi $NHI,0
- alcgr $NHI,$nhi
-
- la $j,8(%r0) # j=1
- lr $count,$num
-
-.align 16
-.L1st:
- lg $alo,0($j,$ap)
- mlgr $ahi,$bi # ap[j]*bp[0]
- algr $alo,$AHI
- lghi $AHI,0
- alcgr $AHI,$ahi
-
- lg $nlo,0($j,$np)
- mlgr $nhi,$mn0 # np[j]*m1
- algr $nlo,$NHI
- lghi $NHI,0
- alcgr $nhi,$NHI # +="tp[j]"
- algr $nlo,$alo
- alcgr $NHI,$nhi
-
- stg $nlo,160-8($j,$sp) # tp[j-1]=
- la $j,8($j) # j++
- brct $count,.L1st
-
- algr $NHI,$AHI
- lghi $AHI,0
- alcgr $AHI,$AHI # upmost overflow bit
- stg $NHI,160-8($j,$sp)
- stg $AHI,160($j,$sp)
- la $bp,8($bp) # bp++
-
-.Louter:
- lg $bi,0($bp) # bp[i]
- lg $alo,0($ap)
- mlgr $ahi,$bi # ap[0]*bp[i]
- alg $alo,160($sp) # +=tp[0]
- lghi $AHI,0
- alcgr $AHI,$ahi
-
- lgr $mn0,$alo
- msgr $mn0,$n0 # tp[0]*n0
-
- lg $nlo,0($np) # np[0]
- mlgr $nhi,$mn0 # np[0]*m1
- algr $nlo,$alo # +="tp[0]"
- lghi $NHI,0
- alcgr $NHI,$nhi
-
- la $j,8(%r0) # j=1
- lr $count,$num
-
-.align 16
-.Linner:
- lg $alo,0($j,$ap)
- mlgr $ahi,$bi # ap[j]*bp[i]
- algr $alo,$AHI
- lghi $AHI,0
- alcgr $ahi,$AHI
- alg $alo,160($j,$sp)# +=tp[j]
- alcgr $AHI,$ahi
-
- lg $nlo,0($j,$np)
- mlgr $nhi,$mn0 # np[j]*m1
- algr $nlo,$NHI
- lghi $NHI,0
- alcgr $nhi,$NHI
- algr $nlo,$alo # +="tp[j]"
- alcgr $NHI,$nhi
-
- stg $nlo,160-8($j,$sp) # tp[j-1]=
- la $j,8($j) # j++
- brct $count,.Linner
-
- algr $NHI,$AHI
- lghi $AHI,0
- alcgr $AHI,$AHI
- alg $NHI,160($j,$sp)# accumulate previous upmost overflow bit
- lghi $ahi,0
- alcgr $AHI,$ahi # new upmost overflow bit
- stg $NHI,160-8($j,$sp)
- stg $AHI,160($j,$sp)
-
- la $bp,8($bp) # bp++
- clg $bp,160+8+32($j,$sp) # compare to &bp[num]
- jne .Louter
-
- lg $rp,160+8+16($j,$sp) # reincarnate rp
- la $ap,160($sp)
- ahi $num,1 # restore $num, incidentally clears "borrow"
-
- la $j,0(%r0)
- lr $count,$num
-.Lsub: lg $alo,0($j,$ap)
- slbg $alo,0($j,$np)
- stg $alo,0($j,$rp)
- la $j,8($j)
- brct $count,.Lsub
- lghi $ahi,0
- slbgr $AHI,$ahi # handle upmost carry
-
- ngr $ap,$AHI
- lghi $np,-1
- xgr $np,$AHI
- ngr $np,$rp
- ogr $ap,$np # ap=borrow?tp:rp
-
- la $j,0(%r0)
- lgr $count,$num
-.Lcopy: lg $alo,0($j,$ap) # copy or in-place refresh
- stg $j,160($j,$sp) # zap tp
- stg $alo,0($j,$rp)
- la $j,8($j)
- brct $count,.Lcopy
-
- la %r1,160+8+48($j,$sp)
- lmg %r6,%r15,0(%r1)
- lghi %r2,1 # signal "processed"
- br %r14
-.size bn_mul_mont,.-bn_mul_mont
-.string "Montgomery Multiplication for s390x, CRYPTOGAMS by <appro\@openssl.org>"
-___
-
-print $code;
-close STDOUT;