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1 files changed, 227 insertions, 0 deletions

diff --git a/src/lib/libcrypto/rc4/asm/rc4-amd64.pl b/src/lib/libcrypto/rc4/asm/rc4-amd64.pl
new file mode 100755
index 0000000000..9e0da8af99
--- /dev/null
+++ b/src/lib/libcrypto/rc4/asm/rc4-amd64.pl
@@ -0,0 +1,227 @@
+#!/usr/bin/env perl
+#
+# ====================================================================
+# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
+# project. Rights for redistribution and usage in source and binary
+# forms are granted according to the OpenSSL license.
+# ====================================================================
+#
+# 2.22x RC4 tune-up:-) It should be noted though that my hand [as in
+# "hand-coded assembler"] doesn't stand for the whole improvement
+# coefficient. It turned out that eliminating RC4_CHAR from config
+# line results in ~40% improvement (yes, even for C implementation).
+# Presumably it has everything to do with AMD cache architecture and
+# RAW or whatever penalties. Once again! The module *requires* config
+# line *without* RC4_CHAR! As for coding "secret," I bet on partial
+# register arithmetics. For example instead of 'inc %r8; and $255,%r8'
+# I simply 'inc %r8b'. Even though optimization manual discourages
+# to operate on partial registers, it turned out to be the best bet.
+# At least for AMD... How IA32E would perform remains to be seen...
+
+# As was shown by Marc Bevand reordering of couple of load operations
+# results in even higher performance gain of 3.3x:-) At least on
+# Opteron... For reference, 1x in this case is RC4_CHAR C-code
+# compiled with gcc 3.3.2, which performs at ~54MBps per 1GHz clock.
+# Latter means that if you want to *estimate* what to expect from
+# *your* CPU, then multiply 54 by 3.3 and clock frequency in GHz.
+
+# Intel P4 EM64T core was found to run the AMD64 code really slow...
+# The only way to achieve comparable performance on P4 is to keep
+# RC4_CHAR. Kind of ironic, huh? As it's apparently impossible to
+# compose blended code, which would perform even within 30% marginal
+# on either AMD and Intel platforms, I implement both cases. See
+# rc4_skey.c for further details... This applies to 0.9.8 and later.
+# In 0.9.7 context RC4_CHAR codepath is never engaged and ~70 bytes
+# of code remain redundant.
+
+$output=shift;
+
+$win64a=1 if ($output =~ /win64a.[s|asm]/);
+
+open STDOUT,">$output" || die "can't open $output: $!";
+
+if (defined($win64a)) {
+    $dat="%rcx";        # arg1
+    $len="%rdx";        # arg2
+    $inp="%rsi";        # r8, arg3 moves here
+    $out="%rdi";        # r9, arg4 moves here
+} else {
+    $dat="%rdi";        # arg1
+    $len="%rsi";        # arg2
+    $inp="%rdx";        # arg3
+    $out="%rcx";        # arg4
+}
+
+$XX="%r10";
+$TX="%r8";
+$YY="%r11";
+$TY="%r9";
+
+sub PTR() {
+    my $ret=shift;
+    if (defined($win64a)) {
+        $ret =~ s/\[([\S]+)\+([\S]+)\]/[$2+$1]/g;   # [%rN+%rM*4]->[%rM*4+%rN]
+        $ret =~ s/:([^\[]+)\[([^\]]+)\]/:[$2+$1]/g; # :off[ea]->:[ea+off]
+    } else {
+        $ret =~ s/[\+\*]/,/g;           # [%rN+%rM*4]->[%rN,%rM,4]
+        $ret =~ s/\[([^\]]+)\]/($1)/g;  # [%rN]->(%rN)
+    }
+    $ret;
+}
+
+$code=<<___ if (!defined($win64a));
+.text
+
+.globl  RC4
+.type   RC4,\@function
+.align  16
+RC4:    or      $len,$len
+        jne     .Lentry
+        repret
+.Lentry:
+___
+$code=<<___ if (defined($win64a));
+_TEXT   SEGMENT
+PUBLIC  RC4
+ALIGN   16
+RC4     PROC
+        or      $len,$len
+        jne     .Lentry
+        repret
+.Lentry:
+        push    %rdi
+        push    %rsi
+        sub     \$40,%rsp
+        mov     %r8,$inp
+        mov     %r9,$out
+___
+$code.=<<___;
+        add     \$8,$dat
+        movl    `&PTR("DWORD:-8[$dat]")`,$XX#d
+        movl    `&PTR("DWORD:-4[$dat]")`,$YY#d
+        cmpl    \$-1,`&PTR("DWORD:256[$dat]")`
+        je      .LRC4_CHAR
+        test    \$-8,$len
+        jz      .Lloop1
+.align  16
+.Lloop8:
+        inc     $XX#b
+        movl    `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+        add     $TX#b,$YY#b
+        movl    `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
+        movl    $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
+        movl    $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+        add     $TX#b,$TY#b
+        inc     $XX#b
+        movl    `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+        movb    `&PTR("BYTE:[$dat+$TY*4]")`,%al
+___
+for ($i=1;$i<=6;$i++) {
+$code.=<<___;
+        add     $TX#b,$YY#b
+        ror     \$8,%rax
+        movl    `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
+        movl    $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
+        movl    $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+        add     $TX#b,$TY#b
+        inc     $XX#b
+        movl    `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+        movb    `&PTR("BYTE:[$dat+$TY*4]")`,%al
+___
+}
+$code.=<<___;
+        add     $TX#b,$YY#b
+        ror     \$8,%rax
+        movl    `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
+        movl    $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
+        movl    $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+        sub     \$8,$len
+        add     $TY#b,$TX#b
+        movb    `&PTR("BYTE:[$dat+$TX*4]")`,%al
+        ror     \$8,%rax
+        add     \$8,$inp
+        add     \$8,$out
+
+        xor     `&PTR("QWORD:-8[$inp]")`,%rax
+        mov     %rax,`&PTR("QWORD:-8[$out]")`
+
+        test    \$-8,$len
+        jnz     .Lloop8
+        cmp     \$0,$len
+        jne     .Lloop1
+.Lexit:
+        movl    $XX#d,`&PTR("DWORD:-8[$dat]")`
+        movl    $YY#d,`&PTR("DWORD:-4[$dat]")`
+___
+$code.=<<___ if (defined($win64a));
+        add     \$40,%rsp
+        pop     %rsi
+        pop     %rdi
+___
+$code.=<<___;
+        repret
+.align  16
+.Lloop1:
+        movzb   `&PTR("BYTE:[$inp]")`,%eax
+        inc     $XX#b
+        movl    `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+        add     $TX#b,$YY#b
+        movl    `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
+        movl    $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
+        movl    $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+        add     $TY#b,$TX#b
+        movl    `&PTR("DWORD:[$dat+$TX*4]")`,$TY#d
+        xor     $TY,%rax
+        inc     $inp
+        movb    %al,`&PTR("BYTE:[$out]")`
+        inc     $out
+        dec     $len
+        jnz     .Lloop1
+        jmp     .Lexit
+
+.align  16
+.LRC4_CHAR:
+        inc     $XX#b
+        movzb   `&PTR("BYTE:[$dat+$XX]")`,$TX#d
+        add     $TX#b,$YY#b
+        movzb   `&PTR("BYTE:[$dat+$YY]")`,$TY#d
+        movb    $TX#b,`&PTR("BYTE:[$dat+$YY]")`
+        movb    $TY#b,`&PTR("BYTE:[$dat+$XX]")`
+        add     $TX#b,$TY#b
+        movzb   `&PTR("BYTE:[$dat+$TY]")`,$TY#d
+        xorb    `&PTR("BYTE:[$inp]")`,$TY#b
+        movb    $TY#b,`&PTR("BYTE:[$out]")`
+        inc     $inp
+        inc     $out
+        dec     $len
+        jnz     .LRC4_CHAR
+        jmp     .Lexit
+___
+$code.=<<___ if (defined($win64a));
+RC4     ENDP
+_TEXT   ENDS
+END
+___
+$code.=<<___ if (!defined($win64a));
+.size   RC4,.-RC4
+___
+
+$code =~ s/#([bwd])/$1/gm;
+$code =~ s/\`([^\`]*)\`/eval $1/gem;
+
+if (defined($win64a)) {
+    $code =~ s/\.align/ALIGN/gm;
+    $code =~ s/[\$%]//gm;
+    $code =~ s/\.L/\$L/gm;
+    $code =~ s/([\w]+)([\s]+)([\S]+),([\S]+)/$1$2$4,$3/gm;
+    $code =~ s/([QD]*WORD|BYTE):/$1 PTR/gm;
+    $code =~ s/mov[bwlq]/mov/gm;
+    $code =~ s/movzb/movzx/gm;
+    $code =~ s/repret/DB\t0F3h,0C3h/gm;
+    $code =~ s/cmpl/cmp/gm;
+    $code =~ s/xorb/xor/gm;
+} else {
+    $code =~ s/([QD]*WORD|BYTE)://gm;
+    $code =~ s/repret/.byte\t0xF3,0xC3/gm;
+}
+print $code;