#!/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/.
# ====================================================================
# October 2005
#
# "Teaser" Montgomery multiplication module for UltraSPARC. Why FPU?
# Because unlike integer multiplier, which simply stalls whole CPU,
# FPU is fully pipelined and can effectively emit 48 bit partial
# product every cycle. Why not blended SPARC v9? One can argue that
# making this module dependent on UltraSPARC VIS extension limits its
# binary compatibility. Well yes, it does exclude SPARC64 prior-V(!)
# implementations from compatibility matrix. But the rest, whole Sun
# UltraSPARC family and brand new Fujitsu's SPARC64 V, all support
# VIS extension instructions used in this module. This is considered
# good enough to not care about HAL SPARC64 users [if any] who have
# integer-only pure SPARCv9 module to "fall down" to.
# USI&II cores currently exhibit uniform 2x improvement [over pre-
# bn_mul_mont codebase] for all key lengths and benchmarks. On USIII
# performance improves few percents for shorter keys and worsens few
# percents for longer keys. This is because USIII integer multiplier
# is >3x faster than USI&II one, which is harder to match [but see
# TODO list below]. It should also be noted that SPARC64 V features
# out-of-order execution, which *might* mean that integer multiplier
# is pipelined, which in turn *might* be impossible to match... On
# additional note, SPARC64 V implements FP Multiply-Add instruction,
# which is perfectly usable in this context... In other words, as far
# as Fujitsu SPARC64 V goes, talk to the author:-)
# The implementation implies following "non-natural" limitations on
# input arguments:
# - num may not be less than 4;
# - num has to be even;
# Failure to meet either condition has no fatal effects, simply
# doesn't give any performance gain.
# TODO:
# - modulo-schedule inner loop for better performance (on in-order
# execution core such as UltraSPARC this shall result in further
# noticeable(!) improvement);
# - dedicated squaring procedure[?];
######################################################################
# November 2006
#
# Modulo-scheduled inner loops allow to interleave floating point and
# integer instructions and minimize Read-After-Write penalties. This
# results in *further* 20-50% perfromance improvement [depending on
# key length, more for longer keys] on USI&II cores and 30-80% - on
# USIII&IV.
$fname="bn_mul_mont_fpu";
$bits=32;
for (@ARGV) { $bits=64 if (/\-m64/ || /\-xarch\=v9/); }
if ($bits==64) {
$bias=2047;
$frame=192;
} else {
$bias=0;
$frame=128; # 96 rounded up to largest known cache-line
}
$locals=64;
# In order to provide for 32-/64-bit ABI duality, I keep integers wider
# than 32 bit in %g1-%g4 and %o0-%o5. %l0-%l7 and %i0-%i5 are used
# exclusively for pointers, indexes and other small values...
# int bn_mul_mont(
$rp="%i0"; # BN_ULONG *rp,
$ap="%i1"; # const BN_ULONG *ap,
$bp="%i2"; # const BN_ULONG *bp,
$np="%i3"; # const BN_ULONG *np,
$n0="%i4"; # const BN_ULONG *n0,
$num="%i5"; # int num);
$tp="%l0"; # t[num]
$ap_l="%l1"; # a[num],n[num] are smashed to 32-bit words and saved
$ap_h="%l2"; # to these four vectors as double-precision FP values.
$np_l="%l3"; # This way a bunch of fxtods are eliminated in second
$np_h="%l4"; # loop and L1-cache aliasing is minimized...
$i="%l5";
$j="%l6";
$mask="%l7"; # 16-bit mask, 0xffff
$n0="%g4"; # reassigned(!) to "64-bit" register
$carry="%i4"; # %i4 reused(!) for a carry bit
# FP register naming chart
#
# ..HILO
# dcba
# --------
# LOa
# LOb
# LOc
# LOd
# HIa
# HIb
# HIc
# HId
# ..a
# ..b
$ba="%f0"; $bb="%f2"; $bc="%f4"; $bd="%f6";
$na="%f8"; $nb="%f10"; $nc="%f12"; $nd="%f14";
$alo="%f16"; $alo_="%f17"; $ahi="%f18"; $ahi_="%f19";
$nlo="%f20"; $nlo_="%f21"; $nhi="%f22"; $nhi_="%f23";
$dota="%f24"; $dotb="%f26";
$aloa="%f32"; $alob="%f34"; $aloc="%f36"; $alod="%f38";
$ahia="%f40"; $ahib="%f42"; $ahic="%f44"; $ahid="%f46";
$nloa="%f48"; $nlob="%f50"; $nloc="%f52"; $nlod="%f54";
$nhia="%f56"; $nhib="%f58"; $nhic="%f60"; $nhid="%f62";
$ASI_FL16_P=0xD2; # magic ASI value to engage 16-bit FP load
$code=<<___;
.section ".text",#alloc,#execinstr
.global $fname
.align 32
$fname:
save %sp,-$frame-$locals,%sp
cmp $num,4
bl,a,pn %icc,.Lret
clr %i0
andcc $num,1,%g0 ! $num has to be even...
bnz,a,pn %icc,.Lret
clr %i0 ! signal "unsupported input value"
srl $num,1,$num
sethi %hi(0xffff),$mask
ld [%i4+0],$n0 ! $n0 reassigned, remember?
or $mask,%lo(0xffff),$mask
ld [%i4+4],%o0
sllx %o0,32,%o0
or %o0,$n0,$n0 ! $n0=n0[1].n0[0]
sll $num,3,$num ! num*=8
add %sp,$bias,%o0 ! real top of stack
sll $num,2,%o1
add %o1,$num,%o1 ! %o1=num*5
sub %o0,%o1,%o0
and %o0,-2048,%o0 ! optimize TLB utilization
sub %o0,$bias,%sp ! alloca(5*num*8)
rd %asi,%o7 ! save %asi
add %sp,$bias+$frame+$locals,$tp
add $tp,$num,$ap_l
add $ap_l,$num,$ap_l ! [an]p_[lh] point at the vectors' ends !
add $ap_l,$num,$ap_h
add $ap_h,$num,$np_l
add $np_l,$num,$np_h
wr %g0,$ASI_FL16_P,%asi ! setup %asi for 16-bit FP loads
add $rp,$num,$rp ! readjust input pointers to point
add $ap,$num,$ap ! at the ends too...
add $bp,$num,$bp
add $np,$num,$np
stx %o7,[%sp+$bias+$frame+48] ! save %asi
sub %g0,$num,$i ! i=-num
sub %g0,$num,$j ! j=-num
add $ap,$j,%o3
add $bp,$i,%o4
ld [%o3+4],%g1 ! bp[0]
ld [%o3+0],%o0
ld [%o4+4],%g5 ! ap[0]
sllx %g1,32,%g1
ld [%o4+0],%o1
sllx %g5,32,%g5
or %g1,%o0,%o0
or %g5,%o1,%o1
add $np,$j,%o5
mulx %o1,%o0,%o0 ! ap[0]*bp[0]
mulx $n0,%o0,%o0 ! ap[0]*bp[0]*n0
stx %o0,[%sp+$bias+$frame+0]
ld [%o3+0],$alo_ ! load a[j] as pair of 32-bit words
fzeros $alo
ld [%o3+4],$ahi_
fzeros $ahi
ld [%o5+0],$nlo_ ! load n[j] as pair of 32-bit words
fzeros $nlo
ld [%o5+4],$nhi_
fzeros $nhi
! transfer b[i] to FPU as 4x16-bit values
ldda [%o4+2]%asi,$ba
fxtod $alo,$alo
ldda [%o4+0]%asi,$bb
fxtod $ahi,$ahi
ldda [%o4+6]%asi,$bc
fxtod $nlo,$nlo
ldda [%o4+4]%asi,$bd
fxtod $nhi,$nhi
! transfer ap[0]*b[0]*n0 to FPU as 4x16-bit values
ldda [%sp+$bias+$frame+6]%asi,$na
fxtod $ba,$ba
ldda [%sp+$bias+$frame+4]%asi,$nb
fxtod $bb,$bb
ldda [%sp+$bias+$frame+2]%asi,$nc
fxtod $bc,$bc
ldda [%sp+$bias+$frame+0]%asi,$nd
fxtod $bd,$bd
std $alo,[$ap_l+$j] ! save smashed ap[j] in double format
fxtod $na,$na
std $ahi,[$ap_h+$j]
fxtod $nb,$nb
std $nlo,[$np_l+$j] ! save smashed np[j] in double format
fxtod $nc,$nc
std $nhi,[$np_h+$j]
fxtod $nd,$nd
fmuld $alo,$ba,$aloa
fmuld $nlo,$na,$nloa
fmuld $alo,$bb,$alob
fmuld $nlo,$nb,$nlob
fmuld $alo,$bc,$aloc
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
fmuld $alo,$bd,$alod
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
fmuld $ahi,$ba,$ahia
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
fmuld $ahi,$bb,$ahib
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
fmuld $ahi,$bc,$ahic
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
fmuld $ahi,$bd,$ahid
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
faddd $ahic,$nhic,$dota ! $nhic
faddd $ahid,$nhid,$dotb ! $nhid
faddd $nloc,$nhia,$nloc
faddd $nlod,$nhib,$nlod
fdtox $nloa,$nloa
fdtox $nlob,$nlob
fdtox $nloc,$nloc
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
add $j,8,$j
std $nlob,[%sp+$bias+$frame+8]
add $ap,$j,%o4
std $nloc,[%sp+$bias+$frame+16]
add $np,$j,%o5
std $nlod,[%sp+$bias+$frame+24]
ld [%o4+0],$alo_ ! load a[j] as pair of 32-bit words
fzeros $alo
ld [%o4+4],$ahi_
fzeros $ahi
ld [%o5+0],$nlo_ ! load n[j] as pair of 32-bit words
fzeros $nlo
ld [%o5+4],$nhi_
fzeros $nhi
fxtod $alo,$alo
fxtod $ahi,$ahi
fxtod $nlo,$nlo
fxtod $nhi,$nhi
ldx [%sp+$bias+$frame+0],%o0
fmuld $alo,$ba,$aloa
ldx [%sp+$bias+$frame+8],%o1
fmuld $nlo,$na,$nloa
ldx [%sp+$bias+$frame+16],%o2
fmuld $alo,$bb,$alob
ldx [%sp+$bias+$frame+24],%o3
fmuld $nlo,$nb,$nlob
srlx %o0,16,%o7
std $alo,[$ap_l+$j] ! save smashed ap[j] in double format
fmuld $alo,$bc,$aloc
add %o7,%o1,%o1
std $ahi,[$ap_h+$j]
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
srlx %o1,16,%o7
std $nlo,[$np_l+$j] ! save smashed np[j] in double format
fmuld $alo,$bd,$alod
add %o7,%o2,%o2
std $nhi,[$np_h+$j]
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
srlx %o2,16,%o7
fmuld $ahi,$ba,$ahia
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
!and %o0,$mask,%o0
!and %o1,$mask,%o1
!and %o2,$mask,%o2
!sllx %o1,16,%o1
!sllx %o2,32,%o2
!sllx %o3,48,%o7
!or %o1,%o0,%o0
!or %o2,%o0,%o0
!or %o7,%o0,%o0 ! 64-bit result
srlx %o3,16,%g1 ! 34-bit carry
fmuld $ahi,$bb,$ahib
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
fmuld $ahi,$bc,$ahic
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
fmuld $ahi,$bd,$ahid
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
faddd $dota,$nloa,$nloa
faddd $dotb,$nlob,$nlob
faddd $ahic,$nhic,$dota ! $nhic
faddd $ahid,$nhid,$dotb ! $nhid
faddd $nloc,$nhia,$nloc
faddd $nlod,$nhib,$nlod
fdtox $nloa,$nloa
fdtox $nlob,$nlob
fdtox $nloc,$nloc
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
std $nlob,[%sp+$bias+$frame+8]
addcc $j,8,$j
std $nloc,[%sp+$bias+$frame+16]
bz,pn %icc,.L1stskip
std $nlod,[%sp+$bias+$frame+24]
.align 32 ! incidentally already aligned !
.L1st:
add $ap,$j,%o4
add $np,$j,%o5
ld [%o4+0],$alo_ ! load a[j] as pair of 32-bit words
fzeros $alo
ld [%o4+4],$ahi_
fzeros $ahi
ld [%o5+0],$nlo_ ! load n[j] as pair of 32-bit words
fzeros $nlo
ld [%o5+4],$nhi_
fzeros $nhi
fxtod $alo,$alo
fxtod $ahi,$ahi
fxtod $nlo,$nlo
fxtod $nhi,$nhi
ldx [%sp+$bias+$frame+0],%o0
fmuld $alo,$ba,$aloa
ldx [%sp+$bias+$frame+8],%o1
fmuld $nlo,$na,$nloa
ldx [%sp+$bias+$frame+16],%o2
fmuld $alo,$bb,$alob
ldx [%sp+$bias+$frame+24],%o3
fmuld $nlo,$nb,$nlob
srlx %o0,16,%o7
std $alo,[$ap_l+$j] ! save smashed ap[j] in double format
fmuld $alo,$bc,$aloc
add %o7,%o1,%o1
std $ahi,[$ap_h+$j]
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
srlx %o1,16,%o7
std $nlo,[$np_l+$j] ! save smashed np[j] in double format
fmuld $alo,$bd,$alod
add %o7,%o2,%o2
std $nhi,[$np_h+$j]
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
srlx %o2,16,%o7
fmuld $ahi,$ba,$ahia
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
and %o0,$mask,%o0
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
and %o1,$mask,%o1
and %o2,$mask,%o2
fmuld $ahi,$bb,$ahib
sllx %o1,16,%o1
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
sllx %o2,32,%o2
fmuld $ahi,$bc,$ahic
sllx %o3,48,%o7
or %o1,%o0,%o0
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
or %o2,%o0,%o0
fmuld $ahi,$bd,$ahid
or %o7,%o0,%o0 ! 64-bit result
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
addcc %g1,%o0,%o0
faddd $dota,$nloa,$nloa
srlx %o3,16,%g1 ! 34-bit carry
faddd $dotb,$nlob,$nlob
bcs,a %xcc,.+8
add %g1,1,%g1
stx %o0,[$tp] ! tp[j-1]=
faddd $ahic,$nhic,$dota ! $nhic
faddd $ahid,$nhid,$dotb ! $nhid
faddd $nloc,$nhia,$nloc
faddd $nlod,$nhib,$nlod
fdtox $nloa,$nloa
fdtox $nlob,$nlob
fdtox $nloc,$nloc
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
std $nlob,[%sp+$bias+$frame+8]
std $nloc,[%sp+$bias+$frame+16]
std $nlod,[%sp+$bias+$frame+24]
addcc $j,8,$j
bnz,pt %icc,.L1st
add $tp,8,$tp
.L1stskip:
fdtox $dota,$dota
fdtox $dotb,$dotb
ldx [%sp+$bias+$frame+0],%o0
ldx [%sp+$bias+$frame+8],%o1
ldx [%sp+$bias+$frame+16],%o2
ldx [%sp+$bias+$frame+24],%o3
srlx %o0,16,%o7
std $dota,[%sp+$bias+$frame+32]
add %o7,%o1,%o1
std $dotb,[%sp+$bias+$frame+40]
srlx %o1,16,%o7
add %o7,%o2,%o2
srlx %o2,16,%o7
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
and %o0,$mask,%o0
and %o1,$mask,%o1
and %o2,$mask,%o2
sllx %o1,16,%o1
sllx %o2,32,%o2
sllx %o3,48,%o7
or %o1,%o0,%o0
or %o2,%o0,%o0
or %o7,%o0,%o0 ! 64-bit result
ldx [%sp+$bias+$frame+32],%o4
addcc %g1,%o0,%o0
ldx [%sp+$bias+$frame+40],%o5
srlx %o3,16,%g1 ! 34-bit carry
bcs,a %xcc,.+8
add %g1,1,%g1
stx %o0,[$tp] ! tp[j-1]=
add $tp,8,$tp
srlx %o4,16,%o7
add %o7,%o5,%o5
and %o4,$mask,%o4
sllx %o5,16,%o7
or %o7,%o4,%o4
addcc %g1,%o4,%o4
srlx %o5,48,%g1
bcs,a %xcc,.+8
add %g1,1,%g1
mov %g1,$carry
stx %o4,[$tp] ! tp[num-1]=
ba .Louter
add $i,8,$i
.align 32
.Louter:
sub %g0,$num,$j ! j=-num
add %sp,$bias+$frame+$locals,$tp
add $ap,$j,%o3
add $bp,$i,%o4
ld [%o3+4],%g1 ! bp[i]
ld [%o3+0],%o0
ld [%o4+4],%g5 ! ap[0]
sllx %g1,32,%g1
ld [%o4+0],%o1
sllx %g5,32,%g5
or %g1,%o0,%o0
or %g5,%o1,%o1
ldx [$tp],%o2 ! tp[0]
mulx %o1,%o0,%o0
addcc %o2,%o0,%o0
mulx $n0,%o0,%o0 ! (ap[0]*bp[i]+t[0])*n0
stx %o0,[%sp+$bias+$frame+0]
! transfer b[i] to FPU as 4x16-bit values
ldda [%o4+2]%asi,$ba
ldda [%o4+0]%asi,$bb
ldda [%o4+6]%asi,$bc
ldda [%o4+4]%asi,$bd
! transfer (ap[0]*b[i]+t[0])*n0 to FPU as 4x16-bit values
ldda [%sp+$bias+$frame+6]%asi,$na
fxtod $ba,$ba
ldda [%sp+$bias+$frame+4]%asi,$nb
fxtod $bb,$bb
ldda [%sp+$bias+$frame+2]%asi,$nc
fxtod $bc,$bc
ldda [%sp+$bias+$frame+0]%asi,$nd
fxtod $bd,$bd
ldd [$ap_l+$j],$alo ! load a[j] in double format
fxtod $na,$na
ldd [$ap_h+$j],$ahi
fxtod $nb,$nb
ldd [$np_l+$j],$nlo ! load n[j] in double format
fxtod $nc,$nc
ldd [$np_h+$j],$nhi
fxtod $nd,$nd
fmuld $alo,$ba,$aloa
fmuld $nlo,$na,$nloa
fmuld $alo,$bb,$alob
fmuld $nlo,$nb,$nlob
fmuld $alo,$bc,$aloc
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
fmuld $alo,$bd,$alod
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
fmuld $ahi,$ba,$ahia
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
fmuld $ahi,$bb,$ahib
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
fmuld $ahi,$bc,$ahic
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
fmuld $ahi,$bd,$ahid
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
faddd $ahic,$nhic,$dota ! $nhic
faddd $ahid,$nhid,$dotb ! $nhid
faddd $nloc,$nhia,$nloc
faddd $nlod,$nhib,$nlod
fdtox $nloa,$nloa
fdtox $nlob,$nlob
fdtox $nloc,$nloc
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
std $nlob,[%sp+$bias+$frame+8]
std $nloc,[%sp+$bias+$frame+16]
add $j,8,$j
std $nlod,[%sp+$bias+$frame+24]
ldd [$ap_l+$j],$alo ! load a[j] in double format
ldd [$ap_h+$j],$ahi
ldd [$np_l+$j],$nlo ! load n[j] in double format
ldd [$np_h+$j],$nhi
fmuld $alo,$ba,$aloa
fmuld $nlo,$na,$nloa
fmuld $alo,$bb,$alob
fmuld $nlo,$nb,$nlob
fmuld $alo,$bc,$aloc
ldx [%sp+$bias+$frame+0],%o0
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
ldx [%sp+$bias+$frame+8],%o1
fmuld $alo,$bd,$alod
ldx [%sp+$bias+$frame+16],%o2
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
ldx [%sp+$bias+$frame+24],%o3
fmuld $ahi,$ba,$ahia
srlx %o0,16,%o7
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
add %o7,%o1,%o1
fmuld $ahi,$bb,$ahib
srlx %o1,16,%o7
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
add %o7,%o2,%o2
fmuld $ahi,$bc,$ahic
srlx %o2,16,%o7
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
! why?
and %o0,$mask,%o0
fmuld $ahi,$bd,$ahid
and %o1,$mask,%o1
and %o2,$mask,%o2
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
sllx %o1,16,%o1
faddd $dota,$nloa,$nloa
sllx %o2,32,%o2
faddd $dotb,$nlob,$nlob
sllx %o3,48,%o7
or %o1,%o0,%o0
faddd $ahic,$nhic,$dota ! $nhic
or %o2,%o0,%o0
faddd $ahid,$nhid,$dotb ! $nhid
or %o7,%o0,%o0 ! 64-bit result
ldx [$tp],%o7
faddd $nloc,$nhia,$nloc
addcc %o7,%o0,%o0
! end-of-why?
faddd $nlod,$nhib,$nlod
srlx %o3,16,%g1 ! 34-bit carry
fdtox $nloa,$nloa
bcs,a %xcc,.+8
add %g1,1,%g1
fdtox $nlob,$nlob
fdtox $nloc,$nloc
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
std $nlob,[%sp+$bias+$frame+8]
addcc $j,8,$j
std $nloc,[%sp+$bias+$frame+16]
bz,pn %icc,.Linnerskip
std $nlod,[%sp+$bias+$frame+24]
ba .Linner
nop
.align 32
.Linner:
ldd [$ap_l+$j],$alo ! load a[j] in double format
ldd [$ap_h+$j],$ahi
ldd [$np_l+$j],$nlo ! load n[j] in double format
ldd [$np_h+$j],$nhi
fmuld $alo,$ba,$aloa
fmuld $nlo,$na,$nloa
fmuld $alo,$bb,$alob
fmuld $nlo,$nb,$nlob
fmuld $alo,$bc,$aloc
ldx [%sp+$bias+$frame+0],%o0
faddd $aloa,$nloa,$nloa
fmuld $nlo,$nc,$nloc
ldx [%sp+$bias+$frame+8],%o1
fmuld $alo,$bd,$alod
ldx [%sp+$bias+$frame+16],%o2
faddd $alob,$nlob,$nlob
fmuld $nlo,$nd,$nlod
ldx [%sp+$bias+$frame+24],%o3
fmuld $ahi,$ba,$ahia
srlx %o0,16,%o7
faddd $aloc,$nloc,$nloc
fmuld $nhi,$na,$nhia
add %o7,%o1,%o1
fmuld $ahi,$bb,$ahib
srlx %o1,16,%o7
faddd $alod,$nlod,$nlod
fmuld $nhi,$nb,$nhib
add %o7,%o2,%o2
fmuld $ahi,$bc,$ahic
srlx %o2,16,%o7
faddd $ahia,$nhia,$nhia
fmuld $nhi,$nc,$nhic
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
and %o0,$mask,%o0
fmuld $ahi,$bd,$ahid
and %o1,$mask,%o1
and %o2,$mask,%o2
faddd $ahib,$nhib,$nhib
fmuld $nhi,$nd,$nhid
sllx %o1,16,%o1
faddd $dota,$nloa,$nloa
sllx %o2,32,%o2
faddd $dotb,$nlob,$nlob
sllx %o3,48,%o7
or %o1,%o0,%o0
faddd $ahic,$nhic,$dota ! $nhic
or %o2,%o0,%o0
faddd $ahid,$nhid,$dotb ! $nhid
or %o7,%o0,%o0 ! 64-bit result
faddd $nloc,$nhia,$nloc
addcc %g1,%o0,%o0
ldx [$tp+8],%o7 ! tp[j]
faddd $nlod,$nhib,$nlod
srlx %o3,16,%g1 ! 34-bit carry
fdtox $nloa,$nloa
bcs,a %xcc,.+8
add %g1,1,%g1
fdtox $nlob,$nlob
addcc %o7,%o0,%o0
fdtox $nloc,$nloc
bcs,a %xcc,.+8
add %g1,1,%g1
stx %o0,[$tp] ! tp[j-1]
fdtox $nlod,$nlod
std $nloa,[%sp+$bias+$frame+0]
std $nlob,[%sp+$bias+$frame+8]
std $nloc,[%sp+$bias+$frame+16]
addcc $j,8,$j
std $nlod,[%sp+$bias+$frame+24]
bnz,pt %icc,.Linner
add $tp,8,$tp
.Linnerskip:
fdtox $dota,$dota
fdtox $dotb,$dotb
ldx [%sp+$bias+$frame+0],%o0
ldx [%sp+$bias+$frame+8],%o1
ldx [%sp+$bias+$frame+16],%o2
ldx [%sp+$bias+$frame+24],%o3
srlx %o0,16,%o7
std $dota,[%sp+$bias+$frame+32]
add %o7,%o1,%o1
std $dotb,[%sp+$bias+$frame+40]
srlx %o1,16,%o7
add %o7,%o2,%o2
srlx %o2,16,%o7
add %o7,%o3,%o3 ! %o3.%o2[0..15].%o1[0..15].%o0[0..15]
and %o0,$mask,%o0
and %o1,$mask,%o1
and %o2,$mask,%o2
sllx %o1,16,%o1
sllx %o2,32,%o2
sllx %o3,48,%o7
or %o1,%o0,%o0
or %o2,%o0,%o0
ldx [%sp+$bias+$frame+32],%o4
or %o7,%o0,%o0 ! 64-bit result
ldx [%sp+$bias+$frame+40],%o5
addcc %g1,%o0,%o0
ldx [$tp+8],%o7 ! tp[j]
srlx %o3,16,%g1 ! 34-bit carry
bcs,a %xcc,.+8
add %g1,1,%g1
addcc %o7,%o0,%o0
bcs,a %xcc,.+8
add %g1,1,%g1
stx %o0,[$tp] ! tp[j-1]
add $tp,8,$tp
srlx %o4,16,%o7
add %o7,%o5,%o5
and %o4,$mask,%o4
sllx %o5,16,%o7
or %o7,%o4,%o4
addcc %g1,%o4,%o4
srlx %o5,48,%g1
bcs,a %xcc,.+8
add %g1,1,%g1
addcc $carry,%o4,%o4
stx %o4,[$tp] ! tp[num-1]
mov %g1,$carry
bcs,a %xcc,.+8
add $carry,1,$carry
addcc $i,8,$i
bnz %icc,.Louter
nop
add $tp,8,$tp ! adjust tp to point at the end
orn %g0,%g0,%g4
sub %g0,$num,%o7 ! n=-num
ba .Lsub
subcc %g0,%g0,%g0 ! clear %icc.c
.align 32
.Lsub:
ldx [$tp+%o7],%o0
add $np,%o7,%g1
ld [%g1+0],%o2
ld [%g1+4],%o3
srlx %o0,32,%o1
subccc %o0,%o2,%o2
add $rp,%o7,%g1
subccc %o1,%o3,%o3
st %o2,[%g1+0]
add %o7,8,%o7
brnz,pt %o7,.Lsub
st %o3,[%g1+4]
subc $carry,0,%g4
sub %g0,$num,%o7 ! n=-num
ba .Lcopy
nop
.align 32
.Lcopy:
ldx [$tp+%o7],%o0
add $rp,%o7,%g1
ld [%g1+0],%o2
ld [%g1+4],%o3
stx %g0,[$tp+%o7]
and %o0,%g4,%o0
srlx %o0,32,%o1
andn %o2,%g4,%o2
andn %o3,%g4,%o3
or %o2,%o0,%o0
or %o3,%o1,%o1
st %o0,[%g1+0]
add %o7,8,%o7
brnz,pt %o7,.Lcopy
st %o1,[%g1+4]
sub %g0,$num,%o7 ! n=-num
.Lzap:
stx %g0,[$ap_l+%o7]
stx %g0,[$ap_h+%o7]
stx %g0,[$np_l+%o7]
stx %g0,[$np_h+%o7]
add %o7,8,%o7
brnz,pt %o7,.Lzap
nop
ldx [%sp+$bias+$frame+48],%o7
wr %g0,%o7,%asi ! restore %asi
mov 1,%i0
.Lret:
ret
restore
.type $fname,#function
.size $fname,(.-$fname)
.asciz "Montgomery Multipltication for UltraSPARC, CRYPTOGAMS by <appro\@openssl.org>"
.align 32
___
$code =~ s/\`([^\`]*)\`/eval($1)/gem;
# Below substitution makes it possible to compile without demanding
# VIS extentions on command line, e.g. -xarch=v9 vs. -xarch=v9a. I
# dare to do this, because VIS capability is detected at run-time now
# and this routine is not called on CPU not capable to execute it. Do
# note that fzeros is not the only VIS dependency! Another dependency
# is implicit and is just _a_ numerical value loaded to %asi register,
# which assembler can't recognize as VIS specific...
$code =~ s/fzeros\s+%f([0-9]+)/
sprintf(".word\t0x%x\t! fzeros %%f%d",0x81b00c20|($1<<25),$1)
/gem;
print $code;
# flush
close STDOUT;