Initial import

1 files changed, 220 insertions, 0 deletions

diff --git a/openssl/crypto/sha/asm/sha1-586.pl b/openssl/crypto/sha/asm/sha1-586.pl
new file mode 100644
index 00000000..a1f87628
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+++ b/openssl/crypto/sha/asm/sha1-586.pl
@@ -0,0 +1,220 @@
+#!/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/.
+# ====================================================================
+
+# "[Re]written" was achieved in two major overhauls. In 2004 BODY_*
+# functions were re-implemented to address P4 performance issue [see
+# commentary below], and in 2006 the rest was rewritten in order to
+# gain freedom to liberate licensing terms.
+
+# It was noted that Intel IA-32 C compiler generates code which
+# performs ~30% *faster* on P4 CPU than original *hand-coded*
+# SHA1 assembler implementation. To address this problem (and
+# prove that humans are still better than machines:-), the
+# original code was overhauled, which resulted in following
+# performance changes:
+#
+#		compared with original	compared with Intel cc
+#		assembler impl.		generated code
+# Pentium	-16%			+48%
+# PIII/AMD	+8%			+16%
+# P4		+85%(!)			+45%
+#
+# As you can see Pentium came out as looser:-( Yet I reckoned that
+# improvement on P4 outweights the loss and incorporate this
+# re-tuned code to 0.9.7 and later.
+# ----------------------------------------------------------------
+#					<appro@fy.chalmers.se>
+
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+push(@INC,"${dir}","${dir}../../perlasm");
+require "x86asm.pl";
+
+&asm_init($ARGV[0],"sha1-586.pl",$ARGV[$#ARGV] eq "386");
+
+$A="eax";
+$B="ebx";
+$C="ecx";
+$D="edx";
+$E="edi";
+$T="esi";
+$tmp1="ebp";
+
+@V=($A,$B,$C,$D,$E,$T);
+
+sub BODY_00_15
+	{
+	local($n,$a,$b,$c,$d,$e,$f)=@_;
+
+	&comment("00_15 $n");
+
+	&mov($f,$c);			# f to hold F_00_19(b,c,d)
+	 if ($n==0)  { &mov($tmp1,$a); }
+	 else        { &mov($a,$tmp1); }
+	&rotl($tmp1,5);			# tmp1=ROTATE(a,5)
+	 &xor($f,$d);
+	&add($tmp1,$e);			# tmp1+=e;
+	 &and($f,$b);
+	&mov($e,&swtmp($n%16));		# e becomes volatile and is loaded
+	 				# with xi, also note that e becomes
+					# f in next round...
+	 &xor($f,$d);			# f holds F_00_19(b,c,d)
+	&rotr($b,2);			# b=ROTATE(b,30)
+	 &lea($tmp1,&DWP(0x5a827999,$tmp1,$e));	# tmp1+=K_00_19+xi
+
+	if ($n==15) { &add($f,$tmp1); }	# f+=tmp1
+	else        { &add($tmp1,$f); }	# f becomes a in next round
+	}
+
+sub BODY_16_19
+	{
+	local($n,$a,$b,$c,$d,$e,$f)=@_;
+
+	&comment("16_19 $n");
+
+	&mov($f,&swtmp($n%16));		# f to hold Xupdate(xi,xa,xb,xc,xd)
+	 &mov($tmp1,$c);		# tmp1 to hold F_00_19(b,c,d)
+	&xor($f,&swtmp(($n+2)%16));
+	 &xor($tmp1,$d);
+	&xor($f,&swtmp(($n+8)%16));
+	 &and($tmp1,$b);		# tmp1 holds F_00_19(b,c,d)
+	&rotr($b,2);			# b=ROTATE(b,30)
+	 &xor($f,&swtmp(($n+13)%16));	# f holds xa^xb^xc^xd
+	&rotl($f,1);			# f=ROTATE(f,1)
+	 &xor($tmp1,$d);		# tmp1=F_00_19(b,c,d)
+	&mov(&swtmp($n%16),$f);		# xi=f
+	&lea($f,&DWP(0x5a827999,$f,$e));# f+=K_00_19+e
+	 &mov($e,$a);			# e becomes volatile
+	&rotl($e,5);			# e=ROTATE(a,5)
+	 &add($f,$tmp1);		# f+=F_00_19(b,c,d)
+	&add($f,$e);			# f+=ROTATE(a,5)
+	}
+
+sub BODY_20_39
+	{
+	local($n,$a,$b,$c,$d,$e,$f)=@_;
+	local $K=($n<40)?0x6ed9eba1:0xca62c1d6;
+
+	&comment("20_39 $n");
+
+	&mov($tmp1,$b);			# tmp1 to hold F_20_39(b,c,d)
+	 &mov($f,&swtmp($n%16));	# f to hold Xupdate(xi,xa,xb,xc,xd)
+	&rotr($b,2);			# b=ROTATE(b,30)
+	 &xor($f,&swtmp(($n+2)%16));
+	&xor($tmp1,$c);
+	 &xor($f,&swtmp(($n+8)%16));
+	&xor($tmp1,$d);			# tmp1 holds F_20_39(b,c,d)
+	 &xor($f,&swtmp(($n+13)%16));	# f holds xa^xb^xc^xd
+	&rotl($f,1);			# f=ROTATE(f,1)
+	 &add($tmp1,$e);
+	&mov(&swtmp($n%16),$f);		# xi=f
+	 &mov($e,$a);			# e becomes volatile
+	&rotl($e,5);			# e=ROTATE(a,5)
+	 &lea($f,&DWP($K,$f,$tmp1));	# f+=K_20_39+e
+	&add($f,$e);			# f+=ROTATE(a,5)
+	}
+
+sub BODY_40_59
+	{
+	local($n,$a,$b,$c,$d,$e,$f)=@_;
+
+	&comment("40_59 $n");
+
+	&mov($f,&swtmp($n%16));		# f to hold Xupdate(xi,xa,xb,xc,xd)
+	 &mov($tmp1,&swtmp(($n+2)%16));
+	&xor($f,$tmp1);
+	 &mov($tmp1,&swtmp(($n+8)%16));
+	&xor($f,$tmp1);
+	 &mov($tmp1,&swtmp(($n+13)%16));
+	&xor($f,$tmp1);			# f holds xa^xb^xc^xd
+	 &mov($tmp1,$b);		# tmp1 to hold F_40_59(b,c,d)
+	&rotl($f,1);			# f=ROTATE(f,1)
+	 &or($tmp1,$c);
+	&mov(&swtmp($n%16),$f);		# xi=f
+	 &and($tmp1,$d);
+	&lea($f,&DWP(0x8f1bbcdc,$f,$e));# f+=K_40_59+e
+	 &mov($e,$b);			# e becomes volatile and is used
+					# to calculate F_40_59(b,c,d)
+	&rotr($b,2);			# b=ROTATE(b,30)
+	 &and($e,$c);
+	&or($tmp1,$e);			# tmp1 holds F_40_59(b,c,d)		
+	 &mov($e,$a);
+	&rotl($e,5);			# e=ROTATE(a,5)
+	 &add($f,$tmp1);		# f+=tmp1;
+	&add($f,$e);			# f+=ROTATE(a,5)
+	}
+
+&function_begin("sha1_block_data_order");
+	&mov($tmp1,&wparam(0));	# SHA_CTX *c
+	&mov($T,&wparam(1));	# const void *input
+	&mov($A,&wparam(2));	# size_t num
+	&stack_push(16);	# allocate X[16]
+	&shl($A,6);
+	&add($A,$T);
+	&mov(&wparam(2),$A);	# pointer beyond the end of input
+	&mov($E,&DWP(16,$tmp1));# pre-load E
+
+	&set_label("loop",16);
+
+	# copy input chunk to X, but reversing byte order!
+	for ($i=0; $i<16; $i+=4)
+		{
+		&mov($A,&DWP(4*($i+0),$T));
+		&mov($B,&DWP(4*($i+1),$T));
+		&mov($C,&DWP(4*($i+2),$T));
+		&mov($D,&DWP(4*($i+3),$T));
+		&bswap($A);
+		&bswap($B);
+		&bswap($C);
+		&bswap($D);
+		&mov(&swtmp($i+0),$A);
+		&mov(&swtmp($i+1),$B);
+		&mov(&swtmp($i+2),$C);
+		&mov(&swtmp($i+3),$D);
+		}
+	&mov(&wparam(1),$T);	# redundant in 1st spin
+
+	&mov($A,&DWP(0,$tmp1));	# load SHA_CTX
+	&mov($B,&DWP(4,$tmp1));
+	&mov($C,&DWP(8,$tmp1));
+	&mov($D,&DWP(12,$tmp1));
+	# E is pre-loaded
+
+	for($i=0;$i<16;$i++)	{ &BODY_00_15($i,@V); unshift(@V,pop(@V)); }
+	for(;$i<20;$i++)	{ &BODY_16_19($i,@V); unshift(@V,pop(@V)); }
+	for(;$i<40;$i++)	{ &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
+	for(;$i<60;$i++)	{ &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
+	for(;$i<80;$i++)	{ &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
+
+	(($V[5] eq $D) and ($V[0] eq $E)) or die;	# double-check
+
+	&mov($tmp1,&wparam(0));	# re-load SHA_CTX*
+	&mov($D,&wparam(1));	# D is last "T" and is discarded
+
+	&add($E,&DWP(0,$tmp1));	# E is last "A"...
+	&add($T,&DWP(4,$tmp1));
+	&add($A,&DWP(8,$tmp1));
+	&add($B,&DWP(12,$tmp1));
+	&add($C,&DWP(16,$tmp1));
+
+	&mov(&DWP(0,$tmp1),$E);	# update SHA_CTX
+	 &add($D,64);		# advance input pointer
+	&mov(&DWP(4,$tmp1),$T);
+	 &cmp($D,&wparam(2));	# have we reached the end yet?
+	&mov(&DWP(8,$tmp1),$A);
+	 &mov($E,$C);		# C is last "E" which needs to be "pre-loaded"
+	&mov(&DWP(12,$tmp1),$B);
+	 &mov($T,$D);		# input pointer
+	&mov(&DWP(16,$tmp1),$C);
+	&jb(&label("loop"));
+
+	&stack_pop(16);
+&function_end("sha1_block_data_order");
+&asciz("SHA1 block transform for x86, CRYPTOGAMS by <appro\@openssl.org>");
+
+&asm_finish();