mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
292 lines
7.9 KiB
Perl
292 lines
7.9 KiB
Perl
#!/usr/bin/env perl
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#
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# ====================================================================
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# Written by Andy Polyakov, @dot-asm, initially for use with OpenSSL.
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# ====================================================================
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#
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# ChaCha20 for Itanium.
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#
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# March 2019
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#
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# Itanium 9xxx, which has pair of shifters, manages to process one byte
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# in 9.3 cycles. This aligns perfectly with theoretical estimate.
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# On the other hand, pre-9000 CPU has single shifter and each extr/dep
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# pairs below takes additional cycle. Then final input->xor->output
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# pass runs slower than expected... Overall result is 15.6 cpb, two
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# cycles more than theoretical estimate.
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$output = pop and open STDOUT, ">$output";
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my @k = map("r$_",(16..31));
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my @x = map("r$_",(38..53));
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my @y = map("r$_",(8..11));
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my @z = map("r$_",(15,35..37));
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my ($out,$inp,$len,$key,$counter) = map("r$_",(32..36));
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$code.=<<___;
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#if defined(_HPUX_SOURCE)
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# if !defined(_LP64)
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# define ADDP addp4
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# else
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# define ADDP add
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# endif
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#else
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# define ADDP add
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#endif
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.text
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.global ChaCha20_ctr32#
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.proc ChaCha20_ctr32#
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.align 32
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ChaCha20_ctr32:
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.prologue
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.save ar.pfs,r2
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{ .mmi; alloc r2=ar.pfs,5,17,0,0
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ADDP @k[11]=4,$key
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.save ar.lc,r3
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mov r3=ar.lc }
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{ .mmi; ADDP $key=0,$key
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ADDP $counter=0,$counter
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.save pr,r14
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mov r14=pr };;
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.body
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{ .mlx; ld4 @k[4]=[$key],8
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movl @k[0]=0x61707865 }
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{ .mlx; ld4 @k[5]=[@k[11]],8
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movl @k[1]=0x3320646e };;
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{ .mlx; ld4 @k[6]=[$key],8
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movl @k[2]=0x79622d32 }
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{ .mlx; ld4 @k[7]=[@k[11]],8
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movl @k[3]=0x6b206574 };;
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{ .mmi; ld4 @k[8]=[$key],8
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ld4 @k[9]=[@k[11]],8
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add @k[15]=4,$counter };;
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{ .mmi; ld4 @k[10]=[$key]
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ld4 @k[11]=[@k[11]]
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mov @x[0]=@k[0] };;
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{ .mmi; ld4 @k[12]=[$counter],8
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ld4 @k[13]=[@k[15]],8
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mov @x[1]=@k[1] };;
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{ .mmi; ld4 @k[14]=[$counter]
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ld4 @k[15]=[@k[15]]
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mov @x[2]=@k[2] }
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{ .mmi; mov @x[3]=@k[3]
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mov @x[4]=@k[4]
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mov @x[5]=@k[5] };;
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{ .mmi; mov @x[6]=@k[6]
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mov @x[7]=@k[7]
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mov @x[8]=@k[8] }
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{ .mmi; mov @x[9]=@k[9]
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mov @x[10]=@k[10]
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mov @x[11]=@k[11] }
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{ .mmi; mov @x[12]=@k[12]
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mov @x[13]=@k[13]
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mov @x[14]=@k[14] };;
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.Loop_outer:
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{ .mii; mov @x[15]=@k[15]
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mov ar.lc=9
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mov ar.ec=1 }
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{ .mmb; cmp.geu p6,p0=64,$len
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sub @z[1]=64,$len
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brp.loop.imp .Loop_top,.Loop_end-16 };;
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.Loop_top:
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___
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sub ROUND {
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my ($a0,$b0,$c0,$d0)=@_;
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my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
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my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
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my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
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$code.=<<___;
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{ .mmi; add @x[$a0]=@x[$a0],@x[$b0]
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add @x[$a1]=@x[$a1],@x[$b1]
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add @x[$a2]=@x[$a2],@x[$b2] };;
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{ .mmi; add @x[$a3]=@x[$a3],@x[$b3]
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xor @x[$d0]=@x[$d0],@x[$a0]
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xor @x[$d1]=@x[$d1],@x[$a1] };;
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{ .mmi; xor @x[$d2]=@x[$d2],@x[$a2]
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xor @x[$d3]=@x[$d3],@x[$a3]
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extr.u @y[0]=@x[$d0],16,16 };;
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{ .mii; extr.u @y[1]=@x[$d1],16,16
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dep @x[$d0]=@x[$d0],@y[0],16,16 };;
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{ .mii; add @x[$c0]=@x[$c0],@x[$d0]
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extr.u @y[2]=@x[$d2],16,16
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dep @x[$d1]=@x[$d1],@y[1],16,16 };;
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{ .mii; add @x[$c1]=@x[$c1],@x[$d1]
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xor @x[$b0]=@x[$b0],@x[$c0]
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extr.u @y[3]=@x[$d3],16,16 };;
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{ .mii; xor @x[$b1]=@x[$b1],@x[$c1]
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dep @x[$d2]=@x[$d2],@y[2],16,16
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dep @x[$d3]=@x[$d3],@y[3],16,16 };;
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{ .mmi; add @x[$c2]=@x[$c2],@x[$d2]
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add @x[$c3]=@x[$c3],@x[$d3]
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extr.u @y[0]=@x[$b0],20,12 };;
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{ .mmi; xor @x[$b2]=@x[$b2],@x[$c2]
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xor @x[$b3]=@x[$b3],@x[$c3]
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dep.z @x[$b0]=@x[$b0],12,20 };;
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{ .mii; or @x[$b0]=@x[$b0],@y[0]
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extr.u @y[1]=@x[$b1],20,12
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dep.z @x[$b1]=@x[$b1],12,20 };;
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{ .mii; add @x[$a0]=@x[$a0],@x[$b0]
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extr.u @y[2]=@x[$b2],20,12
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extr.u @y[3]=@x[$b3],20,12 }
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{ .mii; or @x[$b1]=@x[$b1],@y[1]
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dep.z @x[$b2]=@x[$b2],12,20
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dep.z @x[$b3]=@x[$b3],12,20 };;
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{ .mmi; or @x[$b2]=@x[$b2],@y[2]
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or @x[$b3]=@x[$b3],@y[3]
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add @x[$a1]=@x[$a1],@x[$b1] };;
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{ .mmi; add @x[$a2]=@x[$a2],@x[$b2]
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add @x[$a3]=@x[$a3],@x[$b3]
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xor @x[$d0]=@x[$d0],@x[$a0] };;
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{ .mii; xor @x[$d1]=@x[$d1],@x[$a1]
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extr.u @y[0]=@x[$d0],24,8
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dep.z @x[$d0]=@x[$d0],8,24 };;
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{ .mii; or @x[$d0]=@x[$d0],@y[0]
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extr.u @y[1]=@x[$d1],24,8
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dep.z @x[$d1]=@x[$d1],8,24 };;
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{ .mmi; or @x[$d1]=@x[$d1],@y[1]
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xor @x[$d2]=@x[$d2],@x[$a2]
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xor @x[$d3]=@x[$d3],@x[$a3] };;
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{ .mii; add @x[$c0]=@x[$c0],@x[$d0]
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extr.u @y[2]=@x[$d2],24,8
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dep.z @x[$d2]=@x[$d2],8,24 };;
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{ .mii; xor @x[$b0]=@x[$b0],@x[$c0]
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extr.u @y[3]=@x[$d3],24,8
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dep.z @x[$d3]=@x[$d3],8,24 };;
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{ .mmi; or @x[$d2]=@x[$d2],@y[2]
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or @x[$d3]=@x[$d3],@y[3]
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extr.u @y[0]=@x[$b0],25,7 };;
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{ .mmi; add @x[$c1]=@x[$c1],@x[$d1]
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add @x[$c2]=@x[$c2],@x[$d2]
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dep.z @x[$b0]=@x[$b0],7,25 };;
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{ .mmi; xor @x[$b1]=@x[$b1],@x[$c1]
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xor @x[$b2]=@x[$b2],@x[$c2]
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add @x[$c3]=@x[$c3],@x[$d3] };;
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{ .mii; xor @x[$b3]=@x[$b3],@x[$c3]
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extr.u @y[1]=@x[$b1],25,7
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dep.z @x[$b1]=@x[$b1],7,25 };;
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{ .mii; or @x[$b0]=@x[$b0],@y[0]
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extr.u @y[2]=@x[$b2],25,7
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dep.z @x[$b2]=@x[$b2],7,25 };;
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{ .mii; or @x[$b1]=@x[$b1],@y[1]
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extr.u @y[3]=@x[$b3],25,7
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dep.z @x[$b3]=@x[$b3],7,25 };;
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___
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$code.=<<___ if ($d0 == 12);
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{ .mmi; or @x[$b2]=@x[$b2],@y[2]
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or @x[$b3]=@x[$b3],@y[3]
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mov @z[0]=-1 };;
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___
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$code.=<<___ if ($d0 == 15);
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{ .mmb; or @x[$b2]=@x[$b2],@y[2]
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or @x[$b3]=@x[$b3],@y[3]
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br.ctop.sptk .Loop_top };;
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___
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}
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&ROUND(0, 4, 8, 12);
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&ROUND(0, 5, 10, 15);
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$code.=<<___;
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.Loop_end:
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{ .mmi; add @x[0]=@x[0],@k[0]
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add @x[1]=@x[1],@k[1]
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(p6) shr.u @z[0]=@z[0],@z[1] }
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{ .mmb; add @x[2]=@x[2],@k[2]
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add @x[3]=@x[3],@k[3]
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clrrrb.pr };;
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{ .mmi; add @x[4]=@x[4],@k[4]
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add @x[5]=@x[5],@k[5]
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add @x[6]=@x[6],@k[6] }
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{ .mmi; add @x[7]=@x[7],@k[7]
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add @x[8]=@x[8],@k[8]
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add @x[9]=@x[9],@k[9] }
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{ .mmi; add @x[10]=@x[10],@k[10]
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add @x[11]=@x[11],@k[11]
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add @x[12]=@x[12],@k[12] }
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{ .mmi; add @x[13]=@x[13],@k[13]
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add @x[14]=@x[14],@k[14]
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add @x[15]=@x[15],@k[15] }
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{ .mmi; add @k[12]=1,@k[12] // next counter
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mov pr=@z[0],0x1ffff };;
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//////////////////////////////////////////////////////////////////
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// Each predicate bit corresponds to byte to be processed. Note
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// that p0 is wired to 1, but it works out, because there always
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// is at least one byte to process...
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{ .mmi; (p0) ld1 @z[0]=[$inp],1
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shr.u @y[1]=@x[0],8 };;
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{ .mmi; (p1) ld1 @z[1]=[$inp],1
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(p2) shr.u @y[2]=@x[0],16 };;
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{ .mmi; (p2) ld1 @z[2]=[$inp],1
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(p0) xor @z[0]=@z[0],@x[0]
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(p3) shr.u @y[3]=@x[0],24 };;
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___
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for(my $i0=0; $i0<60; $i0+=4) {
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my ($i1, $i2, $i3, $i4, $i5, $i6, $i7) = map($i0+$_,(1..7));
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my $k = $i0/4+1;
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$code.=<<___;
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{ .mmi; (p$i3) ld1 @z[3]=[$inp],1
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(p$i0) st1 [$out]=@z[0],1
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(p$i1) xor @z[1]=@z[1],@y[1] };;
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{ .mmi; (p$i4) ld1 @z[0]=[$inp],1
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(p$i5) shr.u @y[1]=@x[$k],8 }
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{ .mmi; (p$i1) st1 [$out]=@z[1],1
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(p$i2) xor @z[2]=@z[2],@y[2]
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(p1) mov @x[$k-1]=@k[$k-1] };;
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{ .mfi; (p$i5) ld1 @z[1]=[$inp],1
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(p$i6) shr.u @y[2]=@x[$k],16 }
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{ .mfi; (p$i2) st1 [$out]=@z[2],1
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(p$i3) xor @z[3]=@z[3],@y[3] };;
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{ .mfi; (p$i6) ld1 @z[2]=[$inp],1
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(p$i7) shr.u @y[3]=@x[$k],24 }
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___
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$code.=<<___ if ($i0==0); # p1,p2 are available for reuse in first round
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{ .mmi; (p$i3) st1 [$out]=@z[3],1
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(p$i4) xor @z[0]=@z[0],@x[$k]
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cmp.ltu p1,p2=64,$len };;
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___
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$code.=<<___ if ($i0>0);
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{ .mfi; (p$i3) st1 [$out]=@z[3],1
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(p$i4) xor @z[0]=@z[0],@x[$k] };;
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___
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}
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$code.=<<___;
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{ .mmi; (p63) ld1 @z[3]=[$inp],1
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(p60) st1 [$out]=@z[0],1
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(p61) xor @z[1]=@z[1],@y[1] };;
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{ .mmi; (p61) st1 [$out]=@z[1],1
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(p62) xor @z[2]=@z[2],@y[2] };;
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{ .mmi; (p62) st1 [$out]=@z[2],1
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(p63) xor @z[3]=@z[3],@y[3]
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(p2) mov ar.lc=r3 };;
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{ .mib; (p63) st1 [$out]=@z[3],1
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(p1) add $len=-64,$len
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(p1) br.dptk.many .Loop_outer };;
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{ .mmi; mov @k[4]=0 // wipe key material
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mov @k[5]=0
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mov @k[6]=0 }
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{ .mmi; mov @k[7]=0
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mov @k[8]=0
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mov @k[9]=0 }
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{ .mmi; mov @k[10]=0
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mov @k[11]=0
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mov @k[12]=0 }
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{ .mmi; mov @k[13]=0
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mov @k[14]=0
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mov @k[15]=0 }
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{ .mib; mov pr=r14,0x1ffff
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br.ret.sptk.many b0 };;
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.endp ChaCha20_ctr32#
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stringz "ChaCha20 for IA64, CRYPTOGAMS by \@dot-asm"
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___
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print $code;
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close STDOUT or die "error closing STDOUT: $!";
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