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314 lines
7.5 KiB
Raku
314 lines
7.5 KiB
Raku
#!/usr/bin/env perl
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#
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# ====================================================================
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# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
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# project. The module is, however, dual licensed under OpenSSL and
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# CRYPTOGAMS licenses depending on where you obtain it. For further
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# details see http://www.openssl.org/~appro/cryptogams/.
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# ====================================================================
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#
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# May 2011
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#
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# The module implements bn_GF2m_mul_2x2 polynomial multiplication used
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# in bn_gf2m.c. It's kind of low-hanging mechanical port from C for
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# the time being... Except that it has three code paths: pure integer
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# code suitable for any x86 CPU, MMX code suitable for PIII and later
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# and PCLMULQDQ suitable for Westmere and later. Improvement varies
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# from one benchmark and µ-arch to another. Below are interval values
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# for 163- and 571-bit ECDH benchmarks relative to compiler-generated
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# code:
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#
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# PIII 16%-30%
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# P4 12%-12%
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# Opteron 18%-40%
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# Core2 19%-44%
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# Atom 38%-64%
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# Westmere 53%-121%(PCLMULQDQ)/20%-32%(MMX)
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# Sandy Bridge 72%-127%(PCLMULQDQ)/27%-23%(MMX)
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#
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# Note that above improvement coefficients are not coefficients for
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# bn_GF2m_mul_2x2 itself. For example 120% ECDH improvement is result
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# of bn_GF2m_mul_2x2 being >4x faster. As it gets faster, benchmark
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# is more and more dominated by other subroutines, most notably by
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# BN_GF2m_mod[_mul]_arr...
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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push(@INC,"${dir}","${dir}../../perlasm");
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require "x86asm.pl";
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&asm_init($ARGV[0],$0,$x86only = $ARGV[$#ARGV] eq "386");
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$sse2=0;
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for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
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&external_label("OPENSSL_ia32cap_P") if ($sse2);
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$a="eax";
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$b="ebx";
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($a1,$a2,$a4)=("ecx","edx","ebp");
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$R="mm0";
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@T=("mm1","mm2");
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($A,$B,$B30,$B31)=("mm2","mm3","mm4","mm5");
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@i=("esi","edi");
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if (!$x86only) {
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&function_begin_B("_mul_1x1_mmx");
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&sub ("esp",32+4);
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&mov ($a1,$a);
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&lea ($a2,&DWP(0,$a,$a));
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&and ($a1,0x3fffffff);
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&lea ($a4,&DWP(0,$a2,$a2));
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&mov (&DWP(0*4,"esp"),0);
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&and ($a2,0x7fffffff);
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&movd ($A,$a);
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&movd ($B,$b);
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&mov (&DWP(1*4,"esp"),$a1); # a1
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&xor ($a1,$a2); # a1^a2
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&pxor ($B31,$B31);
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&pxor ($B30,$B30);
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&mov (&DWP(2*4,"esp"),$a2); # a2
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&xor ($a2,$a4); # a2^a4
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&mov (&DWP(3*4,"esp"),$a1); # a1^a2
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&pcmpgtd($B31,$A); # broadcast 31st bit
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&paddd ($A,$A); # $A<<=1
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&xor ($a1,$a2); # a1^a4=a1^a2^a2^a4
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&mov (&DWP(4*4,"esp"),$a4); # a4
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&xor ($a4,$a2); # a2=a4^a2^a4
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&pand ($B31,$B);
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&pcmpgtd($B30,$A); # broadcast 30th bit
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&mov (&DWP(5*4,"esp"),$a1); # a1^a4
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&xor ($a4,$a1); # a1^a2^a4
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&psllq ($B31,31);
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&pand ($B30,$B);
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&mov (&DWP(6*4,"esp"),$a2); # a2^a4
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&mov (@i[0],0x7);
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&mov (&DWP(7*4,"esp"),$a4); # a1^a2^a4
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&mov ($a4,@i[0]);
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&and (@i[0],$b);
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&shr ($b,3);
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&mov (@i[1],$a4);
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&psllq ($B30,30);
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&and (@i[1],$b);
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&shr ($b,3);
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&movd ($R,&DWP(0,"esp",@i[0],4));
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&mov (@i[0],$a4);
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&and (@i[0],$b);
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&shr ($b,3);
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for($n=1;$n<9;$n++) {
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&movd (@T[1],&DWP(0,"esp",@i[1],4));
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&mov (@i[1],$a4);
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&psllq (@T[1],3*$n);
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&and (@i[1],$b);
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&shr ($b,3);
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&pxor ($R,@T[1]);
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push(@i,shift(@i)); push(@T,shift(@T));
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}
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&movd (@T[1],&DWP(0,"esp",@i[1],4));
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&pxor ($R,$B30);
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&psllq (@T[1],3*$n++);
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&pxor ($R,@T[1]);
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&movd (@T[0],&DWP(0,"esp",@i[0],4));
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&pxor ($R,$B31);
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&psllq (@T[0],3*$n);
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&add ("esp",32+4);
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&pxor ($R,@T[0]);
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&ret ();
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&function_end_B("_mul_1x1_mmx");
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}
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($lo,$hi)=("eax","edx");
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@T=("ecx","ebp");
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&function_begin_B("_mul_1x1_ialu");
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&sub ("esp",32+4);
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&mov ($a1,$a);
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&lea ($a2,&DWP(0,$a,$a));
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&lea ($a4,&DWP(0,"",$a,4));
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&and ($a1,0x3fffffff);
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&lea (@i[1],&DWP(0,$lo,$lo));
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&sar ($lo,31); # broadcast 31st bit
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&mov (&DWP(0*4,"esp"),0);
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&and ($a2,0x7fffffff);
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&mov (&DWP(1*4,"esp"),$a1); # a1
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&xor ($a1,$a2); # a1^a2
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&mov (&DWP(2*4,"esp"),$a2); # a2
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&xor ($a2,$a4); # a2^a4
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&mov (&DWP(3*4,"esp"),$a1); # a1^a2
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&xor ($a1,$a2); # a1^a4=a1^a2^a2^a4
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&mov (&DWP(4*4,"esp"),$a4); # a4
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&xor ($a4,$a2); # a2=a4^a2^a4
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&mov (&DWP(5*4,"esp"),$a1); # a1^a4
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&xor ($a4,$a1); # a1^a2^a4
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&sar (@i[1],31); # broardcast 30th bit
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&and ($lo,$b);
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&mov (&DWP(6*4,"esp"),$a2); # a2^a4
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&and (@i[1],$b);
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&mov (&DWP(7*4,"esp"),$a4); # a1^a2^a4
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&mov ($hi,$lo);
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&shl ($lo,31);
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&mov (@T[0],@i[1]);
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&shr ($hi,1);
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&mov (@i[0],0x7);
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&shl (@i[1],30);
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&and (@i[0],$b);
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&shr (@T[0],2);
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&xor ($lo,@i[1]);
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&shr ($b,3);
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&mov (@i[1],0x7); # 5-byte instruction!?
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&and (@i[1],$b);
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&shr ($b,3);
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&xor ($hi,@T[0]);
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&xor ($lo,&DWP(0,"esp",@i[0],4));
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&mov (@i[0],0x7);
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&and (@i[0],$b);
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&shr ($b,3);
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for($n=1;$n<9;$n++) {
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&mov (@T[1],&DWP(0,"esp",@i[1],4));
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&mov (@i[1],0x7);
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&mov (@T[0],@T[1]);
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&shl (@T[1],3*$n);
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&and (@i[1],$b);
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&shr (@T[0],32-3*$n);
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&xor ($lo,@T[1]);
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&shr ($b,3);
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&xor ($hi,@T[0]);
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push(@i,shift(@i)); push(@T,shift(@T));
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}
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&mov (@T[1],&DWP(0,"esp",@i[1],4));
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&mov (@T[0],@T[1]);
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&shl (@T[1],3*$n);
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&mov (@i[1],&DWP(0,"esp",@i[0],4));
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&shr (@T[0],32-3*$n); $n++;
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&mov (@i[0],@i[1]);
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&xor ($lo,@T[1]);
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&shl (@i[1],3*$n);
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&xor ($hi,@T[0]);
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&shr (@i[0],32-3*$n);
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&xor ($lo,@i[1]);
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&xor ($hi,@i[0]);
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&add ("esp",32+4);
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&ret ();
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&function_end_B("_mul_1x1_ialu");
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# void bn_GF2m_mul_2x2(BN_ULONG *r, BN_ULONG a1, BN_ULONG a0, BN_ULONG b1, BN_ULONG b0);
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&function_begin_B("bn_GF2m_mul_2x2");
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if (!$x86only) {
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&picmeup("edx","OPENSSL_ia32cap_P");
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&mov ("eax",&DWP(0,"edx"));
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&mov ("edx",&DWP(4,"edx"));
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&test ("eax",1<<23); # check MMX bit
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&jz (&label("ialu"));
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if ($sse2) {
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&test ("eax",1<<24); # check FXSR bit
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&jz (&label("mmx"));
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&test ("edx",1<<1); # check PCLMULQDQ bit
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&jz (&label("mmx"));
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&movups ("xmm0",&QWP(8,"esp"));
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&shufps ("xmm0","xmm0",0b10110001);
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&pclmulqdq ("xmm0","xmm0",1);
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&mov ("eax",&DWP(4,"esp"));
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&movups (&QWP(0,"eax"),"xmm0");
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&ret ();
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&set_label("mmx",16);
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}
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&push ("ebp");
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&push ("ebx");
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&push ("esi");
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&push ("edi");
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&mov ($a,&wparam(1));
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&mov ($b,&wparam(3));
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&call ("_mul_1x1_mmx"); # a1·b1
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&movq ("mm7",$R);
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&mov ($a,&wparam(2));
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&mov ($b,&wparam(4));
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&call ("_mul_1x1_mmx"); # a0·b0
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&movq ("mm6",$R);
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&mov ($a,&wparam(1));
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&mov ($b,&wparam(3));
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&xor ($a,&wparam(2));
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&xor ($b,&wparam(4));
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&call ("_mul_1x1_mmx"); # (a0+a1)·(b0+b1)
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&pxor ($R,"mm7");
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&mov ($a,&wparam(0));
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&pxor ($R,"mm6"); # (a0+a1)·(b0+b1)-a1·b1-a0·b0
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&movq ($A,$R);
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&psllq ($R,32);
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&pop ("edi");
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&psrlq ($A,32);
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&pop ("esi");
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&pxor ($R,"mm6");
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&pop ("ebx");
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&pxor ($A,"mm7");
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&movq (&QWP(0,$a),$R);
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&pop ("ebp");
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&movq (&QWP(8,$a),$A);
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&emms ();
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&ret ();
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&set_label("ialu",16);
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}
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&push ("ebp");
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&push ("ebx");
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&push ("esi");
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&push ("edi");
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&stack_push(4+1);
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&mov ($a,&wparam(1));
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&mov ($b,&wparam(3));
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&call ("_mul_1x1_ialu"); # a1·b1
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&mov (&DWP(8,"esp"),$lo);
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&mov (&DWP(12,"esp"),$hi);
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&mov ($a,&wparam(2));
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&mov ($b,&wparam(4));
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&call ("_mul_1x1_ialu"); # a0·b0
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&mov (&DWP(0,"esp"),$lo);
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&mov (&DWP(4,"esp"),$hi);
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&mov ($a,&wparam(1));
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&mov ($b,&wparam(3));
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&xor ($a,&wparam(2));
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&xor ($b,&wparam(4));
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&call ("_mul_1x1_ialu"); # (a0+a1)·(b0+b1)
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&mov ("ebp",&wparam(0));
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@r=("ebx","ecx","edi","esi");
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&mov (@r[0],&DWP(0,"esp"));
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&mov (@r[1],&DWP(4,"esp"));
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&mov (@r[2],&DWP(8,"esp"));
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&mov (@r[3],&DWP(12,"esp"));
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&xor ($lo,$hi);
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&xor ($hi,@r[1]);
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&xor ($lo,@r[0]);
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&mov (&DWP(0,"ebp"),@r[0]);
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&xor ($hi,@r[2]);
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&mov (&DWP(12,"ebp"),@r[3]);
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&xor ($lo,@r[3]);
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&stack_pop(4+1);
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&xor ($hi,@r[3]);
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&pop ("edi");
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&xor ($lo,$hi);
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&pop ("esi");
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&mov (&DWP(8,"ebp"),$hi);
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&pop ("ebx");
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&mov (&DWP(4,"ebp"),$lo);
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&pop ("ebp");
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&ret ();
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&function_end_B("bn_GF2m_mul_2x2");
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&asciz ("GF(2^m) Multiplication for x86, CRYPTOGAMS by <appro\@openssl.org>");
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&asm_finish();
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