--- /dev/null
+#!/usr/bin/env perl
+#
+# ====================================================================
+# Written by Andy Polyakov <appro@openssl.org> 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 2012
+#
+# The module implements bn_GF2m_mul_2x2 polynomial multiplication used
+# in bn_gf2m.c. It's kind of low-hanging mechanical port from C for
+# the time being... Except that it has two code paths: one suitable
+# for all SPARCv9 processors and one for VIS3-capable ones. Former
+# delivers ~25-45% more, more for longer keys, heaviest DH and DSA
+# verify operations on venerable UltraSPARC II. On T4 VIS3 code is
+# ~100-230% faster than gcc-generated code and ~35-90% faster than
+# the pure SPARCv9 code path.
+
+$bits=32;
+for (@ARGV) { $bits=64 if (/\-m64/ || /\-xarch\=v9/); }
+if ($bits==64) { $bias=2047; $frame=192; }
+else { $bias=0; $frame=112; }
+
+$locals=16*8;
+
+$code.=<<___;
+#include <sparc_arch.h>
+
+.section ".text",#alloc,#execinstr
+___
+$code.=<<___ if ($bits==64);
+.register %g2,#scratch
+.register %g3,#scratch
+___
+
+$tab="%l0";
+
+@T=("%g2","%g3");
+@i=("%g4","%g5");
+
+($a1,$a2,$a4,$a8,$a12,$a48)=map("%o$_",(0..5));
+($lo,$hi,$b)=("%g1",$a8,"%o7"); $a=$lo;
+
+$code.=<<___;
+#ifdef __PIC__
+SPARC_PIC_THUNK(%g1)
+#endif
+
+.globl bn_GF2m_mul_2x2
+.align 16
+bn_GF2m_mul_2x2:
+ SPARC_LOAD_ADDRESS_LEAF(OPENSSL_sparcv9cap_P,%g1,%g5)
+ ld [%g1+0],%g1 ! OPENSSL_sparcv9cap_P[0]
+
+ andcc %g1, SPARCV9_VIS3, %g0
+ bz,pn %icc,.Lsoftware
+ nop
+
+ sllx %o1, 32, %o1
+ sllx %o3, 32, %o3
+ or %o2, %o1, %o1
+ or %o4, %o3, %o3
+ .word 0x95b262ab ! xmulx %o1, %o3, %o2
+ .word 0x99b262cb ! xmulxhi %o1, %o3, %o4
+ srlx %o2, 32, %o1 ! 13 cycles later
+ st %o2, [%o0+0]
+ st %o1, [%o0+4]
+ srlx %o4, 32, %o3
+ st %o4, [%o0+8]
+ retl
+ st %o3, [%o0+12]
+
+.align 16
+.Lsoftware:
+ save %sp,-$frame-$locals,%sp
+
+ sllx %i1,32,$a
+ mov -1,$a12
+ sllx %i3,32,$b
+ or %i2,$a,$a
+ srlx $a12,1,$a48 ! 0x7fff...
+ or %i4,$b,$b
+ srlx $a12,2,$a12 ! 0x3fff...
+ add %sp,$bias+$frame,$tab
+
+ sllx $a,2,$a4
+ mov $a,$a1
+ sllx $a,1,$a2
+
+ srax $a4,63,@i[1] ! broadcast 61st bit
+ and $a48,$a4,$a4 ! (a<<2)&0x7fff...
+ srlx $a48,2,$a48
+ srax $a2,63,@i[0] ! broadcast 62nd bit
+ and $a12,$a2,$a2 ! (a<<1)&0x3fff...
+ srax $a1,63,$lo ! broadcast 63rd bit
+ and $a48,$a1,$a1 ! (a<<0)&0x1fff...
+
+ sllx $a1,3,$a8
+ and $b,$lo,$lo
+ and $b,@i[0],@i[0]
+ and $b,@i[1],@i[1]
+
+ stx %g0,[$tab+0*8] ! tab[0]=0
+ xor $a1,$a2,$a12
+ stx $a1,[$tab+1*8] ! tab[1]=a1
+ stx $a2,[$tab+2*8] ! tab[2]=a2
+ xor $a4,$a8,$a48
+ stx $a12,[$tab+3*8] ! tab[3]=a1^a2
+ xor $a4,$a1,$a1
+
+ stx $a4,[$tab+4*8] ! tab[4]=a4
+ xor $a4,$a2,$a2
+ stx $a1,[$tab+5*8] ! tab[5]=a1^a4
+ xor $a4,$a12,$a12
+ stx $a2,[$tab+6*8] ! tab[6]=a2^a4
+ xor $a48,$a1,$a1
+ stx $a12,[$tab+7*8] ! tab[7]=a1^a2^a4
+ xor $a48,$a2,$a2
+
+ stx $a8,[$tab+8*8] ! tab[8]=a8
+ xor $a48,$a12,$a12
+ stx $a1,[$tab+9*8] ! tab[9]=a1^a8
+ xor $a4,$a1,$a1
+ stx $a2,[$tab+10*8] ! tab[10]=a2^a8
+ xor $a4,$a2,$a2
+ stx $a12,[$tab+11*8] ! tab[11]=a1^a2^a8
+
+ xor $a4,$a12,$a12
+ stx $a48,[$tab+12*8] ! tab[12]=a4^a8
+ srlx $lo,1,$hi
+ stx $a1,[$tab+13*8] ! tab[13]=a1^a4^a8
+ sllx $lo,63,$lo
+ stx $a2,[$tab+14*8] ! tab[14]=a2^a4^a8
+ srlx @i[0],2,@T[0]
+ stx $a12,[$tab+15*8] ! tab[15]=a1^a2^a4^a8
+
+ sllx @i[0],62,$a1
+ sllx $b,3,@i[0]
+ srlx @i[1],3,@T[1]
+ and @i[0],`0xf<<3`,@i[0]
+ sllx @i[1],61,$a2
+ ldx [$tab+@i[0]],@i[0]
+ srlx $b,4-3,@i[1]
+ xor @T[0],$hi,$hi
+ and @i[1],`0xf<<3`,@i[1]
+ xor $a1,$lo,$lo
+ ldx [$tab+@i[1]],@i[1]
+ xor @T[1],$hi,$hi
+
+ xor @i[0],$lo,$lo
+ srlx $b,8-3,@i[0]
+ xor $a2,$lo,$lo
+ and @i[0],`0xf<<3`,@i[0]
+___
+for($n=1;$n<14;$n++) {
+$code.=<<___;
+ sllx @i[1],`$n*4`,@T[0]
+ ldx [$tab+@i[0]],@i[0]
+ srlx @i[1],`64-$n*4`,@T[1]
+ xor @T[0],$lo,$lo
+ srlx $b,`($n+2)*4`-3,@i[1]
+ xor @T[1],$hi,$hi
+ and @i[1],`0xf<<3`,@i[1]
+___
+ push(@i,shift(@i)); push(@T,shift(@T));
+}
+$code.=<<___;
+ sllx @i[1],`$n*4`,@T[0]
+ ldx [$tab+@i[0]],@i[0]
+ srlx @i[1],`64-$n*4`,@T[1]
+ xor @T[0],$lo,$lo
+
+ sllx @i[0],`($n+1)*4`,@T[0]
+ xor @T[1],$hi,$hi
+ srlx @i[0],`64-($n+1)*4`,@T[1]
+ xor @T[0],$lo,$lo
+ xor @T[1],$hi,$hi
+
+ srlx $lo,32,%i1
+ st $lo,[%i0+0]
+ st %i1,[%i0+4]
+ srlx $hi,32,%i2
+ st $hi,[%i0+8]
+ st %i2,[%i0+12]
+
+ ret
+ restore
+.type bn_GF2m_mul_2x2,#function
+.size bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
+.asciz "GF(2^m) Multiplication for SPARCv9, CRYPTOGAMS by <appro\@openssl.org>"
+.align 4
+___
+
+$code =~ s/\`([^\`]*)\`/eval($1)/gem;
+print $code;
+close STDOUT;
projects / openssl.git / blobdiff