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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/.
+# ====================================================================
+
+# January 2010
+#
+# "Teaser" Montgomery multiplication module for IA-64. There are
+# several possibilities for improvement:
+#
+# - modulo-scheduling outer loop would eliminate quite a number of
+# stalls after ldf8, xma and getf.sig outside inner loop and
+# improve shorter key performance;
+# - shorter vector support [with input vectors being fetched only
+# once] should be added;
+# - 2x unroll with help of n0[1] would make the code scalable on
+# "wider" IA-64, "wider" than Itanium 2 that is, which is not of
+# acute interest, because upcoming Tukwila's individual cores are
+# reportedly based on Itanium 2 design;
+# - dedicated squaring procedure(?);
+#
+# January 2010
+#
+# Shorter vector support is implemented by zero-padding ap and np
+# vectors up to 8 elements, or 512 bits. This means that 256-bit
+# inputs will be processed only 2 times faster than 512-bit inputs,
+# not 4 [as one would expect, because algorithm complexity is n^2].
+# The reason for padding is that inputs shorter than 512 bits won't
+# be processed faster anyway, because minimal critical path of the
+# core loop happens to match 512-bit timing. Either way, it resulted
+# in >100% improvement of 512-bit RSA sign benchmark and 50% - of
+# 1024-bit one [in comparison to original version of *this* module].
+#
+# So far 'openssl speed rsa dsa' output on 900MHz Itanium 2 *with*
+# this module is:
+# sign verify sign/s verify/s
+# rsa 512 bits 0.000290s 0.000024s 3452.8 42031.4
+# rsa 1024 bits 0.000793s 0.000058s 1261.7 17172.0
+# rsa 2048 bits 0.005908s 0.000148s 169.3 6754.0
+# rsa 4096 bits 0.033456s 0.000469s 29.9 2133.6
+# dsa 512 bits 0.000253s 0.000198s 3949.9 5057.0
+# dsa 1024 bits 0.000585s 0.000607s 1708.4 1647.4
+# dsa 2048 bits 0.001453s 0.001703s 688.1 587.4
+#
+# ... and *without* (but still with ia64.S):
+#
+# rsa 512 bits 0.000670s 0.000041s 1491.8 24145.5
+# rsa 1024 bits 0.001988s 0.000080s 502.9 12499.3
+# rsa 2048 bits 0.008702s 0.000189s 114.9 5293.9
+# rsa 4096 bits 0.043860s 0.000533s 22.8 1875.9
+# dsa 512 bits 0.000441s 0.000427s 2265.3 2340.6
+# dsa 1024 bits 0.000823s 0.000867s 1215.6 1153.2
+# dsa 2048 bits 0.001894s 0.002179s 528.1 458.9
+#
+# As it can be seen, RSA sign performance improves by 130-30%,
+# hereafter less for longer keys, while verify - by 74-13%.
+# DSA performance improves by 115-30%.
+
+if ($^O eq "hpux") {
+ $ADDP="addp4";
+ for (@ARGV) { $ADDP="add" if (/[\+DD|\-mlp]64/); }
+} else { $ADDP="add"; }
+
+$code=<<___;
+.explicit
+.text
+
+// int bn_mul_mont (BN_ULONG *rp,const BN_ULONG *ap,
+// const BN_ULONG *bp,const BN_ULONG *np,
+// const BN_ULONG *n0p,int num);
+.align 64
+.global bn_mul_mont#
+.proc bn_mul_mont#
+bn_mul_mont:
+ .prologue
+ .body
+{ .mmi; cmp4.le p6,p7=2,r37;;
+(p6) cmp4.lt.unc p8,p9=8,r37
+ mov ret0=r0 };;
+{ .bbb;
+(p9) br.cond.dptk.many bn_mul_mont_8
+(p8) br.cond.dpnt.many bn_mul_mont_general
+(p7) br.ret.spnt.many b0 };;
+.endp bn_mul_mont#
+
+prevfs=r2; prevpr=r3; prevlc=r10; prevsp=r11;
+
+rptr=r8; aptr=r9; bptr=r14; nptr=r15;
+tptr=r16; // &tp[0]
+tp_1=r17; // &tp[-1]
+num=r18; len=r19; lc=r20;
+topbit=r21; // carry bit from tmp[num]
+
+n0=f6;
+m0=f7;
+bi=f8;
+
+.align 64
+.local bn_mul_mont_general#
+.proc bn_mul_mont_general#
+bn_mul_mont_general:
+ .prologue
+{ .mmi; .save ar.pfs,prevfs
+ alloc prevfs=ar.pfs,6,2,0,8
+ $ADDP aptr=0,in1
+ .save ar.lc,prevlc
+ mov prevlc=ar.lc }
+{ .mmi; .vframe prevsp
+ mov prevsp=sp
+ $ADDP bptr=0,in2
+ .save pr,prevpr
+ mov prevpr=pr };;
+
+ .body
+ .rotf alo[6],nlo[4],ahi[8],nhi[6]
+ .rotr a[3],n[3],t[2]
+
+{ .mmi; ldf8 bi=[bptr],8 // (*bp++)
+ ldf8 alo[4]=[aptr],16 // ap[0]
+ $ADDP r30=8,in1 };;
+{ .mmi; ldf8 alo[3]=[r30],16 // ap[1]
+ ldf8 alo[2]=[aptr],16 // ap[2]
+ $ADDP in4=0,in4 };;
+{ .mmi; ldf8 alo[1]=[r30] // ap[3]
+ ldf8 n0=[in4] // n0
+ $ADDP rptr=0,in0 }
+{ .mmi; $ADDP nptr=0,in3
+ mov r31=16
+ zxt4 num=in5 };;
+{ .mmi; ldf8 nlo[2]=[nptr],8 // np[0]
+ shladd len=num,3,r0
+ shladd r31=num,3,r31 };;
+{ .mmi; ldf8 nlo[1]=[nptr],8 // np[1]
+ add lc=-5,num
+ sub r31=sp,r31 };;
+{ .mfb; and sp=-16,r31 // alloca
+ xmpy.hu ahi[2]=alo[4],bi // ap[0]*bp[0]
+ nop.b 0 }
+{ .mfb; nop.m 0
+ xmpy.lu alo[4]=alo[4],bi
+ brp.loop.imp .L1st_ctop,.L1st_cend-16
+ };;
+{ .mfi; nop.m 0
+ xma.hu ahi[1]=alo[3],bi,ahi[2] // ap[1]*bp[0]
+ add tp_1=8,sp }
+{ .mfi; nop.m 0
+ xma.lu alo[3]=alo[3],bi,ahi[2]
+ mov pr.rot=0x20001f<<16
+ // ------^----- (p40) at first (p23)
+ // ----------^^ p[16:20]=1
+ };;
+{ .mfi; nop.m 0
+ xmpy.lu m0=alo[4],n0 // (ap[0]*bp[0])*n0
+ mov ar.lc=lc }
+{ .mfi; nop.m 0
+ fcvt.fxu.s1 nhi[1]=f0
+ mov ar.ec=8 };;
+
+.align 32
+.L1st_ctop:
+.pred.rel "mutex",p40,p42
+{ .mfi; (p16) ldf8 alo[0]=[aptr],8 // *(aptr++)
+ (p18) xma.hu ahi[0]=alo[2],bi,ahi[1]
+ (p40) add n[2]=n[2],a[2] } // (p23) }
+{ .mfi; (p18) ldf8 nlo[0]=[nptr],8 // *(nptr++)(p16)
+ (p18) xma.lu alo[2]=alo[2],bi,ahi[1]
+ (p42) add n[2]=n[2],a[2],1 };; // (p23)
+{ .mfi; (p21) getf.sig a[0]=alo[5]
+ (p20) xma.hu nhi[0]=nlo[2],m0,nhi[1]
+ (p42) cmp.leu p41,p39=n[2],a[2] } // (p23)
+{ .mfi; (p23) st8 [tp_1]=n[2],8
+ (p20) xma.lu nlo[2]=nlo[2],m0,nhi[1]
+ (p40) cmp.ltu p41,p39=n[2],a[2] } // (p23)
+{ .mmb; (p21) getf.sig n[0]=nlo[3]
+ (p16) nop.m 0
+ br.ctop.sptk .L1st_ctop };;
+.L1st_cend:
+
+{ .mmi; getf.sig a[0]=ahi[6] // (p24)
+ getf.sig n[0]=nhi[4]
+ add num=-1,num };; // num--
+{ .mmi; .pred.rel "mutex",p40,p42
+(p40) add n[0]=n[0],a[0]
+(p42) add n[0]=n[0],a[0],1
+ sub aptr=aptr,len };; // rewind
+{ .mmi; .pred.rel "mutex",p40,p42
+(p40) cmp.ltu p41,p39=n[0],a[0]
+(p42) cmp.leu p41,p39=n[0],a[0]
+ sub nptr=nptr,len };;
+{ .mmi; .pred.rel "mutex",p39,p41
+(p39) add topbit=r0,r0
+(p41) add topbit=r0,r0,1
+ nop.i 0 }
+{ .mmi; st8 [tp_1]=n[0]
+ add tptr=16,sp
+ add tp_1=8,sp };;
+
+.Louter:
+{ .mmi; ldf8 bi=[bptr],8 // (*bp++)
+ ldf8 ahi[3]=[tptr] // tp[0]
+ add r30=8,aptr };;
+{ .mmi; ldf8 alo[4]=[aptr],16 // ap[0]
+ ldf8 alo[3]=[r30],16 // ap[1]
+ add r31=8,nptr };;
+{ .mfb; ldf8 alo[2]=[aptr],16 // ap[2]
+ xma.hu ahi[2]=alo[4],bi,ahi[3] // ap[0]*bp[i]+tp[0]
+ brp.loop.imp .Linner_ctop,.Linner_cend-16
+ }
+{ .mfb; ldf8 alo[1]=[r30] // ap[3]
+ xma.lu alo[4]=alo[4],bi,ahi[3]
+ clrrrb.pr };;
+{ .mfi; ldf8 nlo[2]=[nptr],16 // np[0]
+ xma.hu ahi[1]=alo[3],bi,ahi[2] // ap[1]*bp[i]
+ nop.i 0 }
+{ .mfi; ldf8 nlo[1]=[r31] // np[1]
+ xma.lu alo[3]=alo[3],bi,ahi[2]
+ mov pr.rot=0x20101f<<16
+ // ------^----- (p40) at first (p23)
+ // --------^--- (p30) at first (p22)
+ // ----------^^ p[16:20]=1
+ };;
+{ .mfi; st8 [tptr]=r0 // tp[0] is already accounted
+ xmpy.lu m0=alo[4],n0 // (ap[0]*bp[i]+tp[0])*n0
+ mov ar.lc=lc }
+{ .mfi;
+ fcvt.fxu.s1 nhi[1]=f0
+ mov ar.ec=8 };;
+
+// This loop spins in 4*(n+7) ticks on Itanium 2 and should spin in
+// 7*(n+7) ticks on Itanium (the one codenamed Merced). Factor of 7
+// in latter case accounts for two-tick pipeline stall, which means
+// that its performance would be ~20% lower than optimal one. No
+// attempt was made to address this, because original Itanium is
+// hardly represented out in the wild...
+.align 32
+.Linner_ctop:
+.pred.rel "mutex",p40,p42
+.pred.rel "mutex",p30,p32
+{ .mfi; (p16) ldf8 alo[0]=[aptr],8 // *(aptr++)
+ (p18) xma.hu ahi[0]=alo[2],bi,ahi[1]
+ (p40) add n[2]=n[2],a[2] } // (p23)
+{ .mfi; (p16) nop.m 0
+ (p18) xma.lu alo[2]=alo[2],bi,ahi[1]
+ (p42) add n[2]=n[2],a[2],1 };; // (p23)
+{ .mfi; (p21) getf.sig a[0]=alo[5]
+ (p16) nop.f 0
+ (p40) cmp.ltu p41,p39=n[2],a[2] } // (p23)
+{ .mfi; (p21) ld8 t[0]=[tptr],8
+ (p16) nop.f 0
+ (p42) cmp.leu p41,p39=n[2],a[2] };; // (p23)
+{ .mfi; (p18) ldf8 nlo[0]=[nptr],8 // *(nptr++)
+ (p20) xma.hu nhi[0]=nlo[2],m0,nhi[1]
+ (p30) add a[1]=a[1],t[1] } // (p22)
+{ .mfi; (p16) nop.m 0
+ (p20) xma.lu nlo[2]=nlo[2],m0,nhi[1]
+ (p32) add a[1]=a[1],t[1],1 };; // (p22)
+{ .mmi; (p21) getf.sig n[0]=nlo[3]
+ (p16) nop.m 0
+ (p30) cmp.ltu p31,p29=a[1],t[1] } // (p22)
+{ .mmb; (p23) st8 [tp_1]=n[2],8
+ (p32) cmp.leu p31,p29=a[1],t[1] // (p22)
+ br.ctop.sptk .Linner_ctop };;
+.Linner_cend:
+
+{ .mmi; getf.sig a[0]=ahi[6] // (p24)
+ getf.sig n[0]=nhi[4]
+ nop.i 0 };;
+
+{ .mmi; .pred.rel "mutex",p31,p33
+(p31) add a[0]=a[0],topbit
+(p33) add a[0]=a[0],topbit,1
+ mov topbit=r0 };;
+{ .mfi; .pred.rel "mutex",p31,p33
+(p31) cmp.ltu p32,p30=a[0],topbit
+(p33) cmp.leu p32,p30=a[0],topbit
+ }
+{ .mfi; .pred.rel "mutex",p40,p42
+(p40) add n[0]=n[0],a[0]
+(p42) add n[0]=n[0],a[0],1
+ };;
+{ .mmi; .pred.rel "mutex",p44,p46
+(p40) cmp.ltu p41,p39=n[0],a[0]
+(p42) cmp.leu p41,p39=n[0],a[0]
+(p32) add topbit=r0,r0,1 }
+
+{ .mmi; st8 [tp_1]=n[0],8
+ cmp4.ne p6,p0=1,num
+ sub aptr=aptr,len };; // rewind
+{ .mmi; sub nptr=nptr,len
+(p41) add topbit=r0,r0,1
+ add tptr=16,sp }
+{ .mmb; add tp_1=8,sp
+ add num=-1,num // num--
+(p6) br.cond.sptk.many .Louter };;
+
+{ .mbb; add lc=4,lc
+ brp.loop.imp .Lsub_ctop,.Lsub_cend-16
+ clrrrb.pr };;
+{ .mii; nop.m 0
+ mov pr.rot=0x10001<<16
+ // ------^---- (p33) at first (p17)
+ mov ar.lc=lc }
+{ .mii; nop.m 0
+ mov ar.ec=3
+ nop.i 0 };;
+
+.Lsub_ctop:
+.pred.rel "mutex",p33,p35
+{ .mfi; (p16) ld8 t[0]=[tptr],8 // t=*(tp++)
+ (p16) nop.f 0
+ (p33) sub n[1]=t[1],n[1] } // (p17)
+{ .mfi; (p16) ld8 n[0]=[nptr],8 // n=*(np++)
+ (p16) nop.f 0
+ (p35) sub n[1]=t[1],n[1],1 };; // (p17)
+{ .mib; (p18) st8 [rptr]=n[2],8 // *(rp++)=r
+ (p33) cmp.gtu p34,p32=n[1],t[1] // (p17)
+ (p18) nop.b 0 }
+{ .mib; (p18) nop.m 0
+ (p35) cmp.geu p34,p32=n[1],t[1] // (p17)
+ br.ctop.sptk .Lsub_ctop };;
+.Lsub_cend:
+
+{ .mmb; .pred.rel "mutex",p34,p36
+(p34) sub topbit=topbit,r0 // (p19)
+(p36) sub topbit=topbit,r0,1
+ brp.loop.imp .Lcopy_ctop,.Lcopy_cend-16
+ }
+{ .mmb; sub rptr=rptr,len // rewind
+ sub tptr=tptr,len
+ clrrrb.pr };;
+{ .mmi; and aptr=tptr,topbit
+ andcm bptr=rptr,topbit
+ mov pr.rot=1<<16 };;
+{ .mii; or nptr=aptr,bptr
+ mov ar.lc=lc
+ mov ar.ec=3 };;
+
+.Lcopy_ctop:
+{ .mmb; (p16) ld8 n[0]=[nptr],8
+ (p18) st8 [tptr]=r0,8
+ (p16) nop.b 0 }
+{ .mmb; (p16) nop.m 0
+ (p18) st8 [rptr]=n[2],8
+ br.ctop.sptk .Lcopy_ctop };;
+.Lcopy_cend:
+
+{ .mmi; mov ret0=1 // signal "handled"
+ rum 1<<5 // clear um.mfh
+ mov ar.lc=prevlc }
+{ .mib; .restore sp
+ mov sp=prevsp
+ mov pr=prevpr,0x1ffff
+ br.ret.sptk.many b0 };;
+.endp bn_mul_mont_general#
+
+a1=r16; a2=r17; a3=r18; a4=r19; a5=r20; a6=r21; a7=r22; a8=r23;
+n1=r24; n2=r25; n3=r26; n4=r27; n5=r28; n6=r29; n7=r30; n8=r31;
+t0=r15;
+
+ai0=f8; ai1=f9; ai2=f10; ai3=f11; ai4=f12; ai5=f13; ai6=f14; ai7=f15;
+ni0=f16; ni1=f17; ni2=f18; ni3=f19; ni4=f20; ni5=f21; ni6=f22; ni7=f23;
+
+.align 64
+.skip 48 // aligns loop body
+.local bn_mul_mont_8#
+.proc bn_mul_mont_8#
+bn_mul_mont_8:
+ .prologue
+{ .mmi; .save ar.pfs,prevfs
+ alloc prevfs=ar.pfs,6,2,0,8
+ .vframe prevsp
+ mov prevsp=sp
+ .save ar.lc,prevlc
+ mov prevlc=ar.lc }
+{ .mmi; add r17=-6*16,sp
+ add sp=-7*16,sp
+ .save pr,prevpr
+ mov prevpr=pr };;
+
+{ .mmi; .save.gf 0,0x10
+ stf.spill [sp]=f16,-16
+ .save.gf 0,0x20
+ stf.spill [r17]=f17,32
+ add r16=-5*16,prevsp};;
+{ .mmi; .save.gf 0,0x40
+ stf.spill [r16]=f18,32
+ .save.gf 0,0x80
+ stf.spill [r17]=f19,32
+ $ADDP aptr=0,in1 };;
+{ .mmi; .save.gf 0,0x100
+ stf.spill [r16]=f20,32
+ .save.gf 0,0x200
+ stf.spill [r17]=f21,32
+ $ADDP r29=8,in1 };;
+{ .mmi; .save.gf 0,0x400
+ stf.spill [r16]=f22
+ .save.gf 0,0x800
+ stf.spill [r17]=f23
+ $ADDP rptr=0,in0 };;
+
+ .body
+ .rotf bj[8],mj[2],tf[2],alo[10],ahi[10],nlo[10],nhi[10]
+ .rotr t[8]
+
+// load input vectors padding them to 8 elements
+{ .mmi; ldf8 ai0=[aptr],16 // ap[0]
+ ldf8 ai1=[r29],16 // ap[1]
+ $ADDP bptr=0,in2 }
+{ .mmi; $ADDP r30=8,in2
+ $ADDP nptr=0,in3
+ $ADDP r31=8,in3 };;
+{ .mmi; ldf8 bj[7]=[bptr],16 // bp[0]
+ ldf8 bj[6]=[r30],16 // bp[1]
+ cmp4.le p4,p5=3,in5 }
+{ .mmi; ldf8 ni0=[nptr],16 // np[0]
+ ldf8 ni1=[r31],16 // np[1]
+ cmp4.le p6,p7=4,in5 };;
+
+{ .mfi; (p4)ldf8 ai2=[aptr],16 // ap[2]
+ (p5)fcvt.fxu ai2=f0
+ cmp4.le p8,p9=5,in5 }
+{ .mfi; (p6)ldf8 ai3=[r29],16 // ap[3]
+ (p7)fcvt.fxu ai3=f0
+ cmp4.le p10,p11=6,in5 }
+{ .mfi; (p4)ldf8 bj[5]=[bptr],16 // bp[2]
+ (p5)fcvt.fxu bj[5]=f0
+ cmp4.le p12,p13=7,in5 }
+{ .mfi; (p6)ldf8 bj[4]=[r30],16 // bp[3]
+ (p7)fcvt.fxu bj[4]=f0
+ cmp4.le p14,p15=8,in5 }
+{ .mfi; (p4)ldf8 ni2=[nptr],16 // np[2]
+ (p5)fcvt.fxu ni2=f0
+ addp4 r28=-1,in5 }
+{ .mfi; (p6)ldf8 ni3=[r31],16 // np[3]
+ (p7)fcvt.fxu ni3=f0
+ $ADDP in4=0,in4 };;
+
+{ .mfi; ldf8 n0=[in4]
+ fcvt.fxu tf[1]=f0
+ nop.i 0 }
+
+{ .mfi; (p8)ldf8 ai4=[aptr],16 // ap[4]
+ (p9)fcvt.fxu ai4=f0
+ mov t[0]=r0 }
+{ .mfi; (p10)ldf8 ai5=[r29],16 // ap[5]
+ (p11)fcvt.fxu ai5=f0
+ mov t[1]=r0 }
+{ .mfi; (p8)ldf8 bj[3]=[bptr],16 // bp[4]
+ (p9)fcvt.fxu bj[3]=f0
+ mov t[2]=r0 }
+{ .mfi; (p10)ldf8 bj[2]=[r30],16 // bp[5]
+ (p11)fcvt.fxu bj[2]=f0
+ mov t[3]=r0 }
+{ .mfi; (p8)ldf8 ni4=[nptr],16 // np[4]
+ (p9)fcvt.fxu ni4=f0
+ mov t[4]=r0 }
+{ .mfi; (p10)ldf8 ni5=[r31],16 // np[5]
+ (p11)fcvt.fxu ni5=f0
+ mov t[5]=r0 };;
+
+{ .mfi; (p12)ldf8 ai6=[aptr],16 // ap[6]
+ (p13)fcvt.fxu ai6=f0
+ mov t[6]=r0 }
+{ .mfi; (p14)ldf8 ai7=[r29],16 // ap[7]
+ (p15)fcvt.fxu ai7=f0
+ mov t[7]=r0 }
+{ .mfi; (p12)ldf8 bj[1]=[bptr],16 // bp[6]
+ (p13)fcvt.fxu bj[1]=f0
+ mov ar.lc=r28 }
+{ .mfi; (p14)ldf8 bj[0]=[r30],16 // bp[7]
+ (p15)fcvt.fxu bj[0]=f0
+ mov ar.ec=1 }
+{ .mfi; (p12)ldf8 ni6=[nptr],16 // np[6]
+ (p13)fcvt.fxu ni6=f0
+ mov pr.rot=1<<16 }
+{ .mfb; (p14)ldf8 ni7=[r31],16 // np[7]
+ (p15)fcvt.fxu ni7=f0
+ brp.loop.imp .Louter_8_ctop,.Louter_8_cend-16
+ };;
+
+// The loop is scheduled for 32*n ticks on Itanium 2. Actual attempt
+// to measure with help of Interval Time Counter indicated that the
+// factor is a tad higher: 33 or 34, if not 35. Exact measurement and
+// addressing the issue is problematic, because I don't have access
+// to platform-specific instruction-level profiler. On Itanium it
+// should run in 56*n ticks, because of higher xma latency...
+.Louter_8_ctop:
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mfi; (p16) nop.m 0 // 0:
+ (p16) xma.hu ahi[0]=ai0,bj[7],tf[1] // ap[0]*b[i]+t[0]
+ (p40) add a3=a3,n3 } // (p17) a3+=n3
+{ .mfi; (p42) add a3=a3,n3,1
+ (p16) xma.lu alo[0]=ai0,bj[7],tf[1]
+ (p16) nop.i 0 };;
+{ .mii; (p17) getf.sig a7=alo[8] // 1:
+ (p48) add t[6]=t[6],a3 // (p17) t[6]+=a3
+ (p50) add t[6]=t[6],a3,1 };;
+{ .mfi; (p17) getf.sig a8=ahi[8] // 2:
+ (p17) xma.hu nhi[7]=ni6,mj[1],nhi[6] // np[6]*m0
+ (p40) cmp.ltu p43,p41=a3,n3 }
+{ .mfi; (p42) cmp.leu p43,p41=a3,n3
+ (p17) xma.lu nlo[7]=ni6,mj[1],nhi[6]
+ (p16) nop.i 0 };;
+{ .mii; (p17) getf.sig n5=nlo[6] // 3:
+ (p48) cmp.ltu p51,p49=t[6],a3
+ (p50) cmp.leu p51,p49=t[6],a3 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mfi; (p16) nop.m 0 // 4:
+ (p16) xma.hu ahi[1]=ai1,bj[7],ahi[0] // ap[1]*b[i]
+ (p41) add a4=a4,n4 } // (p17) a4+=n4
+{ .mfi; (p43) add a4=a4,n4,1
+ (p16) xma.lu alo[1]=ai1,bj[7],ahi[0]
+ (p16) nop.i 0 };;
+{ .mfi; (p49) add t[5]=t[5],a4 // 5: (p17) t[5]+=a4
+ (p16) xmpy.lu mj[0]=alo[0],n0 // (ap[0]*b[i]+t[0])*n0
+ (p51) add t[5]=t[5],a4,1 };;
+{ .mfi; (p16) nop.m 0 // 6:
+ (p17) xma.hu nhi[8]=ni7,mj[1],nhi[7] // np[7]*m0
+ (p41) cmp.ltu p42,p40=a4,n4 }
+{ .mfi; (p43) cmp.leu p42,p40=a4,n4
+ (p17) xma.lu nlo[8]=ni7,mj[1],nhi[7]
+ (p16) nop.i 0 };;
+{ .mii; (p17) getf.sig n6=nlo[7] // 7:
+ (p49) cmp.ltu p50,p48=t[5],a4
+ (p51) cmp.leu p50,p48=t[5],a4 };;
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mfi; (p16) nop.m 0 // 8:
+ (p16) xma.hu ahi[2]=ai2,bj[7],ahi[1] // ap[2]*b[i]
+ (p40) add a5=a5,n5 } // (p17) a5+=n5
+{ .mfi; (p42) add a5=a5,n5,1
+ (p16) xma.lu alo[2]=ai2,bj[7],ahi[1]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig a1=alo[1] // 9:
+ (p48) add t[4]=t[4],a5 // p(17) t[4]+=a5
+ (p50) add t[4]=t[4],a5,1 };;
+{ .mfi; (p16) nop.m 0 // 10:
+ (p16) xma.hu nhi[0]=ni0,mj[0],alo[0] // np[0]*m0
+ (p40) cmp.ltu p43,p41=a5,n5 }
+{ .mfi; (p42) cmp.leu p43,p41=a5,n5
+ (p16) xma.lu nlo[0]=ni0,mj[0],alo[0]
+ (p16) nop.i 0 };;
+{ .mii; (p17) getf.sig n7=nlo[8] // 11:
+ (p48) cmp.ltu p51,p49=t[4],a5
+ (p50) cmp.leu p51,p49=t[4],a5 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mfi; (p17) getf.sig n8=nhi[8] // 12:
+ (p16) xma.hu ahi[3]=ai3,bj[7],ahi[2] // ap[3]*b[i]
+ (p41) add a6=a6,n6 } // (p17) a6+=n6
+{ .mfi; (p43) add a6=a6,n6,1
+ (p16) xma.lu alo[3]=ai3,bj[7],ahi[2]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig a2=alo[2] // 13:
+ (p49) add t[3]=t[3],a6 // (p17) t[3]+=a6
+ (p51) add t[3]=t[3],a6,1 };;
+{ .mfi; (p16) nop.m 0 // 14:
+ (p16) xma.hu nhi[1]=ni1,mj[0],nhi[0] // np[1]*m0
+ (p41) cmp.ltu p42,p40=a6,n6 }
+{ .mfi; (p43) cmp.leu p42,p40=a6,n6
+ (p16) xma.lu nlo[1]=ni1,mj[0],nhi[0]
+ (p16) nop.i 0 };;
+{ .mii; (p16) nop.m 0 // 15:
+ (p49) cmp.ltu p50,p48=t[3],a6
+ (p51) cmp.leu p50,p48=t[3],a6 };;
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mfi; (p16) nop.m 0 // 16:
+ (p16) xma.hu ahi[4]=ai4,bj[7],ahi[3] // ap[4]*b[i]
+ (p40) add a7=a7,n7 } // (p17) a7+=n7
+{ .mfi; (p42) add a7=a7,n7,1
+ (p16) xma.lu alo[4]=ai4,bj[7],ahi[3]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig a3=alo[3] // 17:
+ (p48) add t[2]=t[2],a7 // (p17) t[2]+=a7
+ (p50) add t[2]=t[2],a7,1 };;
+{ .mfi; (p16) nop.m 0 // 18:
+ (p16) xma.hu nhi[2]=ni2,mj[0],nhi[1] // np[2]*m0
+ (p40) cmp.ltu p43,p41=a7,n7 }
+{ .mfi; (p42) cmp.leu p43,p41=a7,n7
+ (p16) xma.lu nlo[2]=ni2,mj[0],nhi[1]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig n1=nlo[1] // 19:
+ (p48) cmp.ltu p51,p49=t[2],a7
+ (p50) cmp.leu p51,p49=t[2],a7 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mfi; (p16) nop.m 0 // 20:
+ (p16) xma.hu ahi[5]=ai5,bj[7],ahi[4] // ap[5]*b[i]
+ (p41) add a8=a8,n8 } // (p17) a8+=n8
+{ .mfi; (p43) add a8=a8,n8,1
+ (p16) xma.lu alo[5]=ai5,bj[7],ahi[4]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig a4=alo[4] // 21:
+ (p49) add t[1]=t[1],a8 // (p17) t[1]+=a8
+ (p51) add t[1]=t[1],a8,1 };;
+{ .mfi; (p16) nop.m 0 // 22:
+ (p16) xma.hu nhi[3]=ni3,mj[0],nhi[2] // np[3]*m0
+ (p41) cmp.ltu p42,p40=a8,n8 }
+{ .mfi; (p43) cmp.leu p42,p40=a8,n8
+ (p16) xma.lu nlo[3]=ni3,mj[0],nhi[2]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig n2=nlo[2] // 23:
+ (p49) cmp.ltu p50,p48=t[1],a8
+ (p51) cmp.leu p50,p48=t[1],a8 };;
+{ .mfi; (p16) nop.m 0 // 24:
+ (p16) xma.hu ahi[6]=ai6,bj[7],ahi[5] // ap[6]*b[i]
+ (p16) add a1=a1,n1 } // (p16) a1+=n1
+{ .mfi; (p16) nop.m 0
+ (p16) xma.lu alo[6]=ai6,bj[7],ahi[5]
+ (p17) mov t[0]=r0 };;
+{ .mii; (p16) getf.sig a5=alo[5] // 25:
+ (p16) add t0=t[7],a1 // (p16) t[7]+=a1
+ (p42) add t[0]=t[0],r0,1 };;
+{ .mfi; (p16) setf.sig tf[0]=t0 // 26:
+ (p16) xma.hu nhi[4]=ni4,mj[0],nhi[3] // np[4]*m0
+ (p50) add t[0]=t[0],r0,1 }
+{ .mfi; (p16) cmp.ltu.unc p42,p40=a1,n1
+ (p16) xma.lu nlo[4]=ni4,mj[0],nhi[3]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig n3=nlo[3] // 27:
+ (p16) cmp.ltu.unc p50,p48=t0,a1
+ (p16) nop.i 0 };;
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mfi; (p16) nop.m 0 // 28:
+ (p16) xma.hu ahi[7]=ai7,bj[7],ahi[6] // ap[7]*b[i]
+ (p40) add a2=a2,n2 } // (p16) a2+=n2
+{ .mfi; (p42) add a2=a2,n2,1
+ (p16) xma.lu alo[7]=ai7,bj[7],ahi[6]
+ (p16) nop.i 0 };;
+{ .mii; (p16) getf.sig a6=alo[6] // 29:
+ (p48) add t[6]=t[6],a2 // (p16) t[6]+=a2
+ (p50) add t[6]=t[6],a2,1 };;
+{ .mfi; (p16) nop.m 0 // 30:
+ (p16) xma.hu nhi[5]=ni5,mj[0],nhi[4] // np[5]*m0
+ (p40) cmp.ltu p41,p39=a2,n2 }
+{ .mfi; (p42) cmp.leu p41,p39=a2,n2
+ (p16) xma.lu nlo[5]=ni5,mj[0],nhi[4]
+ (p16) nop.i 0 };;
+{ .mfi; (p16) getf.sig n4=nlo[4] // 31:
+ (p16) nop.f 0
+ (p48) cmp.ltu p49,p47=t[6],a2 }
+{ .mfb; (p50) cmp.leu p49,p47=t[6],a2
+ (p16) nop.f 0
+ br.ctop.sptk.many .Louter_8_ctop };;
+.Louter_8_cend:
+
+// above loop has to execute one more time, without (p16), which is
+// replaced with merged move of np[8] to GPR bank
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mmi; (p0) getf.sig n1=ni0 // 0:
+ (p40) add a3=a3,n3 // (p17) a3+=n3
+ (p42) add a3=a3,n3,1 };;
+{ .mii; (p17) getf.sig a7=alo[8] // 1:
+ (p48) add t[6]=t[6],a3 // (p17) t[6]+=a3
+ (p50) add t[6]=t[6],a3,1 };;
+{ .mfi; (p17) getf.sig a8=ahi[8] // 2:
+ (p17) xma.hu nhi[7]=ni6,mj[1],nhi[6] // np[6]*m0
+ (p40) cmp.ltu p43,p41=a3,n3 }
+{ .mfi; (p42) cmp.leu p43,p41=a3,n3
+ (p17) xma.lu nlo[7]=ni6,mj[1],nhi[6]
+ (p0) nop.i 0 };;
+{ .mii; (p17) getf.sig n5=nlo[6] // 3:
+ (p48) cmp.ltu p51,p49=t[6],a3
+ (p50) cmp.leu p51,p49=t[6],a3 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mmi; (p0) getf.sig n2=ni1 // 4:
+ (p41) add a4=a4,n4 // (p17) a4+=n4
+ (p43) add a4=a4,n4,1 };;
+{ .mfi; (p49) add t[5]=t[5],a4 // 5: (p17) t[5]+=a4
+ (p0) nop.f 0
+ (p51) add t[5]=t[5],a4,1 };;
+{ .mfi; (p0) getf.sig n3=ni2 // 6:
+ (p17) xma.hu nhi[8]=ni7,mj[1],nhi[7] // np[7]*m0
+ (p41) cmp.ltu p42,p40=a4,n4 }
+{ .mfi; (p43) cmp.leu p42,p40=a4,n4
+ (p17) xma.lu nlo[8]=ni7,mj[1],nhi[7]
+ (p0) nop.i 0 };;
+{ .mii; (p17) getf.sig n6=nlo[7] // 7:
+ (p49) cmp.ltu p50,p48=t[5],a4
+ (p51) cmp.leu p50,p48=t[5],a4 };;
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mii; (p0) getf.sig n4=ni3 // 8:
+ (p40) add a5=a5,n5 // (p17) a5+=n5
+ (p42) add a5=a5,n5,1 };;
+{ .mii; (p0) nop.m 0 // 9:
+ (p48) add t[4]=t[4],a5 // p(17) t[4]+=a5
+ (p50) add t[4]=t[4],a5,1 };;
+{ .mii; (p0) nop.m 0 // 10:
+ (p40) cmp.ltu p43,p41=a5,n5
+ (p42) cmp.leu p43,p41=a5,n5 };;
+{ .mii; (p17) getf.sig n7=nlo[8] // 11:
+ (p48) cmp.ltu p51,p49=t[4],a5
+ (p50) cmp.leu p51,p49=t[4],a5 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mii; (p17) getf.sig n8=nhi[8] // 12:
+ (p41) add a6=a6,n6 // (p17) a6+=n6
+ (p43) add a6=a6,n6,1 };;
+{ .mii; (p0) getf.sig n5=ni4 // 13:
+ (p49) add t[3]=t[3],a6 // (p17) t[3]+=a6
+ (p51) add t[3]=t[3],a6,1 };;
+{ .mii; (p0) nop.m 0 // 14:
+ (p41) cmp.ltu p42,p40=a6,n6
+ (p43) cmp.leu p42,p40=a6,n6 };;
+{ .mii; (p0) getf.sig n6=ni5 // 15:
+ (p49) cmp.ltu p50,p48=t[3],a6
+ (p51) cmp.leu p50,p48=t[3],a6 };;
+ .pred.rel "mutex",p40,p42
+ .pred.rel "mutex",p48,p50
+{ .mii; (p0) nop.m 0 // 16:
+ (p40) add a7=a7,n7 // (p17) a7+=n7
+ (p42) add a7=a7,n7,1 };;
+{ .mii; (p0) nop.m 0 // 17:
+ (p48) add t[2]=t[2],a7 // (p17) t[2]+=a7
+ (p50) add t[2]=t[2],a7,1 };;
+{ .mii; (p0) nop.m 0 // 18:
+ (p40) cmp.ltu p43,p41=a7,n7
+ (p42) cmp.leu p43,p41=a7,n7 };;
+{ .mii; (p0) getf.sig n7=ni6 // 19:
+ (p48) cmp.ltu p51,p49=t[2],a7
+ (p50) cmp.leu p51,p49=t[2],a7 };;
+ .pred.rel "mutex",p41,p43
+ .pred.rel "mutex",p49,p51
+{ .mii; (p0) nop.m 0 // 20:
+ (p41) add a8=a8,n8 // (p17) a8+=n8
+ (p43) add a8=a8,n8,1 };;
+{ .mmi; (p0) nop.m 0 // 21:
+ (p49) add t[1]=t[1],a8 // (p17) t[1]+=a8
+ (p51) add t[1]=t[1],a8,1 }
+{ .mmi; (p17) mov t[0]=r0
+ (p41) cmp.ltu p42,p40=a8,n8
+ (p43) cmp.leu p42,p40=a8,n8 };;
+{ .mmi; (p0) getf.sig n8=ni7 // 22:
+ (p49) cmp.ltu p50,p48=t[1],a8
+ (p51) cmp.leu p50,p48=t[1],a8 }
+{ .mmi; (p42) add t[0]=t[0],r0,1
+ (p0) add r16=-7*16,prevsp
+ (p0) add r17=-6*16,prevsp };;
+
+// subtract np[8] from carrybit|tmp[8]
+// carrybit|tmp[8] layout upon exit from above loop is:
+// t[0]|t[1]|t[2]|t[3]|t[4]|t[5]|t[6]|t[7]|t0 (least significant)
+{ .mmi; (p50)add t[0]=t[0],r0,1
+ add r18=-5*16,prevsp
+ sub n1=t0,n1 };;
+{ .mmi; cmp.gtu p34,p32=n1,t0;;
+ .pred.rel "mutex",p32,p34
+ (p32)sub n2=t[7],n2
+ (p34)sub n2=t[7],n2,1 };;
+{ .mii; (p32)cmp.gtu p35,p33=n2,t[7]
+ (p34)cmp.geu p35,p33=n2,t[7];;
+ .pred.rel "mutex",p33,p35
+ (p33)sub n3=t[6],n3 }
+{ .mmi; (p35)sub n3=t[6],n3,1;;
+ (p33)cmp.gtu p34,p32=n3,t[6]
+ (p35)cmp.geu p34,p32=n3,t[6] };;
+ .pred.rel "mutex",p32,p34
+{ .mii; (p32)sub n4=t[5],n4
+ (p34)sub n4=t[5],n4,1;;
+ (p32)cmp.gtu p35,p33=n4,t[5] }
+{ .mmi; (p34)cmp.geu p35,p33=n4,t[5];;
+ .pred.rel "mutex",p33,p35
+ (p33)sub n5=t[4],n5
+ (p35)sub n5=t[4],n5,1 };;
+{ .mii; (p33)cmp.gtu p34,p32=n5,t[4]
+ (p35)cmp.geu p34,p32=n5,t[4];;
+ .pred.rel "mutex",p32,p34
+ (p32)sub n6=t[3],n6 }
+{ .mmi; (p34)sub n6=t[3],n6,1;;
+ (p32)cmp.gtu p35,p33=n6,t[3]
+ (p34)cmp.geu p35,p33=n6,t[3] };;
+ .pred.rel "mutex",p33,p35
+{ .mii; (p33)sub n7=t[2],n7
+ (p35)sub n7=t[2],n7,1;;
+ (p33)cmp.gtu p34,p32=n7,t[2] }
+{ .mmi; (p35)cmp.geu p34,p32=n7,t[2];;
+ .pred.rel "mutex",p32,p34
+ (p32)sub n8=t[1],n8
+ (p34)sub n8=t[1],n8,1 };;
+{ .mii; (p32)cmp.gtu p35,p33=n8,t[1]
+ (p34)cmp.geu p35,p33=n8,t[1];;
+ .pred.rel "mutex",p33,p35
+ (p33)sub a8=t[0],r0 }
+{ .mmi; (p35)sub a8=t[0],r0,1;;
+ (p33)cmp.gtu p34,p32=a8,t[0]
+ (p35)cmp.geu p34,p32=a8,t[0] };;
+
+// save the result, either tmp[num] or tmp[num]-np[num]
+ .pred.rel "mutex",p32,p34
+{ .mmi; (p32)st8 [rptr]=n1,8
+ (p34)st8 [rptr]=t0,8
+ add r19=-4*16,prevsp};;
+{ .mmb; (p32)st8 [rptr]=n2,8
+ (p34)st8 [rptr]=t[7],8
+ (p5)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n3,8
+ (p34)st8 [rptr]=t[6],8
+ (p7)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n4,8
+ (p34)st8 [rptr]=t[5],8
+ (p9)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n5,8
+ (p34)st8 [rptr]=t[4],8
+ (p11)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n6,8
+ (p34)st8 [rptr]=t[3],8
+ (p13)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n7,8
+ (p34)st8 [rptr]=t[2],8
+ (p15)br.cond.dpnt.few .Ldone };;
+{ .mmb; (p32)st8 [rptr]=n8,8
+ (p34)st8 [rptr]=t[1],8
+ nop.b 0 };;
+.Ldone: // epilogue
+{ .mmi; ldf.fill f16=[r16],64
+ ldf.fill f17=[r17],64
+ nop.i 0 }
+{ .mmi; ldf.fill f18=[r18],64
+ ldf.fill f19=[r19],64
+ mov pr=prevpr,0x1ffff };;
+{ .mmi; ldf.fill f20=[r16]
+ ldf.fill f21=[r17]
+ mov ar.lc=prevlc }
+{ .mmi; ldf.fill f22=[r18]
+ ldf.fill f23=[r19]
+ mov ret0=1 } // signal "handled"
+{ .mib; rum 1<<5
+ .restore sp
+ mov sp=prevsp
+ br.ret.sptk.many b0 };;
+.endp bn_mul_mont_8#
+
+.type copyright#,\@object
+copyright:
+stringz "Montgomery multiplication for IA-64, CRYPTOGAMS by <appro\@openssl.org>"
+___
+
+$output=shift and open STDOUT,">$output";
+print $code;
+close STDOUT;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 01:56:10 +0000