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Diffstat (limited to 'openssl/crypto/rc4/asm/rc4-586.pl')
-rw-r--r--openssl/crypto/rc4/asm/rc4-586.pl270
1 files changed, 0 insertions, 270 deletions
diff --git a/openssl/crypto/rc4/asm/rc4-586.pl b/openssl/crypto/rc4/asm/rc4-586.pl
deleted file mode 100644
index 38a44a70..00000000
--- a/openssl/crypto/rc4/asm/rc4-586.pl
+++ /dev/null
@@ -1,270 +0,0 @@
-#!/usr/bin/env perl
-
-# ====================================================================
-# [Re]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/.
-# ====================================================================
-
-# At some point it became apparent that the original SSLeay RC4
-# assembler implementation performs suboptimally on latest IA-32
-# microarchitectures. After re-tuning performance has changed as
-# following:
-#
-# Pentium -10%
-# Pentium III +12%
-# AMD +50%(*)
-# P4 +250%(**)
-#
-# (*) This number is actually a trade-off:-) It's possible to
-# achieve +72%, but at the cost of -48% off PIII performance.
-# In other words code performing further 13% faster on AMD
-# would perform almost 2 times slower on Intel PIII...
-# For reference! This code delivers ~80% of rc4-amd64.pl
-# performance on the same Opteron machine.
-# (**) This number requires compressed key schedule set up by
-# RC4_set_key [see commentary below for further details].
-#
-# <appro@fy.chalmers.se>
-
-$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
-push(@INC,"${dir}","${dir}../../perlasm");
-require "x86asm.pl";
-
-&asm_init($ARGV[0],"rc4-586.pl");
-
-$xx="eax";
-$yy="ebx";
-$tx="ecx";
-$ty="edx";
-$inp="esi";
-$out="ebp";
-$dat="edi";
-
-sub RC4_loop {
- my $i=shift;
- my $func = ($i==0)?*mov:*or;
-
- &add (&LB($yy),&LB($tx));
- &mov ($ty,&DWP(0,$dat,$yy,4));
- &mov (&DWP(0,$dat,$yy,4),$tx);
- &mov (&DWP(0,$dat,$xx,4),$ty);
- &add ($ty,$tx);
- &inc (&LB($xx));
- &and ($ty,0xff);
- &ror ($out,8) if ($i!=0);
- if ($i<3) {
- &mov ($tx,&DWP(0,$dat,$xx,4));
- } else {
- &mov ($tx,&wparam(3)); # reload [re-biased] out
- }
- &$func ($out,&DWP(0,$dat,$ty,4));
-}
-
-# void RC4(RC4_KEY *key,size_t len,const unsigned char *inp,unsigned char *out);
-&function_begin("RC4");
- &mov ($dat,&wparam(0)); # load key schedule pointer
- &mov ($ty, &wparam(1)); # load len
- &mov ($inp,&wparam(2)); # load inp
- &mov ($out,&wparam(3)); # load out
-
- &xor ($xx,$xx); # avoid partial register stalls
- &xor ($yy,$yy);
-
- &cmp ($ty,0); # safety net
- &je (&label("abort"));
-
- &mov (&LB($xx),&BP(0,$dat)); # load key->x
- &mov (&LB($yy),&BP(4,$dat)); # load key->y
- &add ($dat,8);
-
- &lea ($tx,&DWP(0,$inp,$ty));
- &sub ($out,$inp); # re-bias out
- &mov (&wparam(1),$tx); # save input+len
-
- &inc (&LB($xx));
-
- # detect compressed key schedule...
- &cmp (&DWP(256,$dat),-1);
- &je (&label("RC4_CHAR"));
-
- &mov ($tx,&DWP(0,$dat,$xx,4));
-
- &and ($ty,-4); # how many 4-byte chunks?
- &jz (&label("loop1"));
-
- &lea ($ty,&DWP(-4,$inp,$ty));
- &mov (&wparam(2),$ty); # save input+(len/4)*4-4
- &mov (&wparam(3),$out); # $out as accumulator in this loop
-
- &set_label("loop4",16);
- for ($i=0;$i<4;$i++) { RC4_loop($i); }
- &ror ($out,8);
- &xor ($out,&DWP(0,$inp));
- &cmp ($inp,&wparam(2)); # compare to input+(len/4)*4-4
- &mov (&DWP(0,$tx,$inp),$out);# $tx holds re-biased out here
- &lea ($inp,&DWP(4,$inp));
- &mov ($tx,&DWP(0,$dat,$xx,4));
- &jb (&label("loop4"));
-
- &cmp ($inp,&wparam(1)); # compare to input+len
- &je (&label("done"));
- &mov ($out,&wparam(3)); # restore $out
-
- &set_label("loop1",16);
- &add (&LB($yy),&LB($tx));
- &mov ($ty,&DWP(0,$dat,$yy,4));
- &mov (&DWP(0,$dat,$yy,4),$tx);
- &mov (&DWP(0,$dat,$xx,4),$ty);
- &add ($ty,$tx);
- &inc (&LB($xx));
- &and ($ty,0xff);
- &mov ($ty,&DWP(0,$dat,$ty,4));
- &xor (&LB($ty),&BP(0,$inp));
- &lea ($inp,&DWP(1,$inp));
- &mov ($tx,&DWP(0,$dat,$xx,4));
- &cmp ($inp,&wparam(1)); # compare to input+len
- &mov (&BP(-1,$out,$inp),&LB($ty));
- &jb (&label("loop1"));
-
- &jmp (&label("done"));
-
-# this is essentially Intel P4 specific codepath...
-&set_label("RC4_CHAR",16);
- &movz ($tx,&BP(0,$dat,$xx));
- # strangely enough unrolled loop performs over 20% slower...
- &set_label("cloop1");
- &add (&LB($yy),&LB($tx));
- &movz ($ty,&BP(0,$dat,$yy));
- &mov (&BP(0,$dat,$yy),&LB($tx));
- &mov (&BP(0,$dat,$xx),&LB($ty));
- &add (&LB($ty),&LB($tx));
- &movz ($ty,&BP(0,$dat,$ty));
- &add (&LB($xx),1);
- &xor (&LB($ty),&BP(0,$inp));
- &lea ($inp,&DWP(1,$inp));
- &movz ($tx,&BP(0,$dat,$xx));
- &cmp ($inp,&wparam(1));
- &mov (&BP(-1,$out,$inp),&LB($ty));
- &jb (&label("cloop1"));
-
-&set_label("done");
- &dec (&LB($xx));
- &mov (&BP(-4,$dat),&LB($yy)); # save key->y
- &mov (&BP(-8,$dat),&LB($xx)); # save key->x
-&set_label("abort");
-&function_end("RC4");
-
-########################################################################
-
-$inp="esi";
-$out="edi";
-$idi="ebp";
-$ido="ecx";
-$idx="edx";
-
-&external_label("OPENSSL_ia32cap_P");
-
-# void RC4_set_key(RC4_KEY *key,int len,const unsigned char *data);
-&function_begin("RC4_set_key");
- &mov ($out,&wparam(0)); # load key
- &mov ($idi,&wparam(1)); # load len
- &mov ($inp,&wparam(2)); # load data
- &picmeup($idx,"OPENSSL_ia32cap_P");
-
- &lea ($out,&DWP(2*4,$out)); # &key->data
- &lea ($inp,&DWP(0,$inp,$idi)); # $inp to point at the end
- &neg ($idi);
- &xor ("eax","eax");
- &mov (&DWP(-4,$out),$idi); # borrow key->y
-
- &bt (&DWP(0,$idx),20); # check for bit#20
- &jc (&label("c1stloop"));
-
-&set_label("w1stloop",16);
- &mov (&DWP(0,$out,"eax",4),"eax"); # key->data[i]=i;
- &add (&LB("eax"),1); # i++;
- &jnc (&label("w1stloop"));
-
- &xor ($ido,$ido);
- &xor ($idx,$idx);
-
-&set_label("w2ndloop",16);
- &mov ("eax",&DWP(0,$out,$ido,4));
- &add (&LB($idx),&BP(0,$inp,$idi));
- &add (&LB($idx),&LB("eax"));
- &add ($idi,1);
- &mov ("ebx",&DWP(0,$out,$idx,4));
- &jnz (&label("wnowrap"));
- &mov ($idi,&DWP(-4,$out));
- &set_label("wnowrap");
- &mov (&DWP(0,$out,$idx,4),"eax");
- &mov (&DWP(0,$out,$ido,4),"ebx");
- &add (&LB($ido),1);
- &jnc (&label("w2ndloop"));
-&jmp (&label("exit"));
-
-# Unlike all other x86 [and x86_64] implementations, Intel P4 core
-# [including EM64T] was found to perform poorly with above "32-bit" key
-# schedule, a.k.a. RC4_INT. Performance improvement for IA-32 hand-coded
-# assembler turned out to be 3.5x if re-coded for compressed 8-bit one,
-# a.k.a. RC4_CHAR! It's however inappropriate to just switch to 8-bit
-# schedule for x86[_64], because non-P4 implementations suffer from
-# significant performance losses then, e.g. PIII exhibits >2x
-# deterioration, and so does Opteron. In order to assure optimal
-# all-round performance, we detect P4 at run-time and set up compressed
-# key schedule, which is recognized by RC4 procedure.
-
-&set_label("c1stloop",16);
- &mov (&BP(0,$out,"eax"),&LB("eax")); # key->data[i]=i;
- &add (&LB("eax"),1); # i++;
- &jnc (&label("c1stloop"));
-
- &xor ($ido,$ido);
- &xor ($idx,$idx);
- &xor ("ebx","ebx");
-
-&set_label("c2ndloop",16);
- &mov (&LB("eax"),&BP(0,$out,$ido));
- &add (&LB($idx),&BP(0,$inp,$idi));
- &add (&LB($idx),&LB("eax"));
- &add ($idi,1);
- &mov (&LB("ebx"),&BP(0,$out,$idx));
- &jnz (&label("cnowrap"));
- &mov ($idi,&DWP(-4,$out));
- &set_label("cnowrap");
- &mov (&BP(0,$out,$idx),&LB("eax"));
- &mov (&BP(0,$out,$ido),&LB("ebx"));
- &add (&LB($ido),1);
- &jnc (&label("c2ndloop"));
-
- &mov (&DWP(256,$out),-1); # mark schedule as compressed
-
-&set_label("exit");
- &xor ("eax","eax");
- &mov (&DWP(-8,$out),"eax"); # key->x=0;
- &mov (&DWP(-4,$out),"eax"); # key->y=0;
-&function_end("RC4_set_key");
-
-# const char *RC4_options(void);
-&function_begin_B("RC4_options");
- &call (&label("pic_point"));
-&set_label("pic_point");
- &blindpop("eax");
- &lea ("eax",&DWP(&label("opts")."-".&label("pic_point"),"eax"));
- &picmeup("edx","OPENSSL_ia32cap_P");
- &bt (&DWP(0,"edx"),20);
- &jnc (&label("skip"));
- &add ("eax",12);
- &set_label("skip");
- &ret ();
-&set_label("opts",64);
-&asciz ("rc4(4x,int)");
-&asciz ("rc4(1x,char)");
-&asciz ("RC4 for x86, CRYPTOGAMS by <appro\@openssl.org>");
-&align (64);
-&function_end_B("RC4_options");
-
-&asm_finish();
-
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