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1 files changed, 150 insertions, 0 deletions

diff --git a/src/lib/libcrypto/rc4/asm/rc4-x86_64.pl b/src/lib/libcrypto/rc4/asm/rc4-x86_64.pl
new file mode 100755
index 0000000000..b628daca70
--- /dev/null
+++ b/src/lib/libcrypto/rc4/asm/rc4-x86_64.pl
@@ -0,0 +1,150 @@
+#!/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.
+# ====================================================================
+#
+# Unlike 0.9.7f this code expects RC4_CHAR back in config line! See
+# commentary section in corresponding script in development branch
+# for background information about this option carousel. For those
+# who don't have energy to figure out these gory details, here is
+# basis in form of performance matrix relative to the original
+# 0.9.7e C code-base:
+#
+#               0.9.7e  0.9.7f  this
+# AMD64         1x      3.3x    2.4x
+# EM64T         1x      0.8x    1.5x
+#
+# In other words idea is to trade -25% AMD64 performance to compensate
+# for deterioration and gain +90% on EM64T core. Development branch
+# maintains best performance for either target, i.e. 3.3x for AMD64
+# and 1.5x for EM64T.
+
+$output=shift;
+
+open STDOUT,">$output" || die "can't open $output: $!";
+
+$dat="%rdi";        # arg1
+$len="%rsi";        # arg2
+$inp="%rdx";        # arg3
+$out="%rcx";        # arg4
+
+@XX=("%r8","%r10");
+@TX=("%r9","%r11");
+$YY="%r12";
+$TY="%r13";
+
+$code=<<___;;
+.text
+
+.globl  RC4
+.type   RC4,\@function
+.align  16
+RC4:    or      $len,$len
+        jne     .Lentry
+        repret
+.Lentry:
+        push    %r12
+        push    %r13
+
+        add     \$2,$dat
+        movzb   -2($dat),$XX[0]#d
+        movzb   -1($dat),$YY#d
+
+        add     \$1,$XX[0]#b
+        movzb   ($dat,$XX[0]),$TX[0]#d
+        test    \$-8,$len
+        jz      .Lcloop1
+        push    %rbx
+.align  16      # incidentally aligned already
+.Lcloop8:
+        mov     ($inp),%eax
+        mov     4($inp),%ebx
+___
+# unroll 2x4-wise, because 64-bit rotates kill Intel P4...
+for ($i=0;$i<4;$i++) {
+$code.=<<___;
+        add     $TX[0]#b,$YY#b
+        lea     1($XX[0]),$XX[1]
+        movzb   ($dat,$YY),$TY#d
+        movzb   $XX[1]#b,$XX[1]#d
+        movzb   ($dat,$XX[1]),$TX[1]#d
+        movb    $TX[0]#b,($dat,$YY)
+        cmp     $XX[1],$YY
+        movb    $TY#b,($dat,$XX[0])
+        jne     .Lcmov$i                        # Intel cmov is sloooow...
+        mov     $TX[0],$TX[1]
+.Lcmov$i:
+        add     $TX[0]#b,$TY#b
+        xor     ($dat,$TY),%al
+        ror     \$8,%eax
+___
+push(@TX,shift(@TX)); push(@XX,shift(@XX));     # "rotate" registers
+}
+for ($i=4;$i<8;$i++) {
+$code.=<<___;
+        add     $TX[0]#b,$YY#b
+        lea     1($XX[0]),$XX[1]
+        movzb   ($dat,$YY),$TY#d
+        movzb   $XX[1]#b,$XX[1]#d
+        movzb   ($dat,$XX[1]),$TX[1]#d
+        movb    $TX[0]#b,($dat,$YY)
+        cmp     $XX[1],$YY
+        movb    $TY#b,($dat,$XX[0])
+        jne     .Lcmov$i                        # Intel cmov is sloooow...
+        mov     $TX[0],$TX[1]
+.Lcmov$i:
+        add     $TX[0]#b,$TY#b
+        xor     ($dat,$TY),%bl
+        ror     \$8,%ebx
+___
+push(@TX,shift(@TX)); push(@XX,shift(@XX));     # "rotate" registers
+}
+$code.=<<___;
+        lea     -8($len),$len
+        mov     %eax,($out)
+        lea     8($inp),$inp
+        mov     %ebx,4($out)
+        lea     8($out),$out
+
+        test    \$-8,$len
+        jnz     .Lcloop8
+        pop     %rbx
+        cmp     \$0,$len
+        jne     .Lcloop1
+.Lexit:
+        sub     \$1,$XX[0]#b
+        movb    $XX[0]#b,-2($dat)
+        movb    $YY#b,-1($dat)
+
+        pop     %r13
+        pop     %r12
+        repret
+
+.align  16
+.Lcloop1:
+        add     $TX[0]#b,$YY#b
+        movzb   ($dat,$YY),$TY#d
+        movb    $TX[0]#b,($dat,$YY)
+        movb    $TY#b,($dat,$XX[0])
+        add     $TX[0]#b,$TY#b
+        add     \$1,$XX[0]#b
+        movzb   ($dat,$TY),$TY#d
+        movzb   ($dat,$XX[0]),$TX[0]#d
+        xorb    ($inp),$TY#b
+        lea     1($inp),$inp
+        movb    $TY#b,($out)
+        lea     1($out),$out
+        sub     \$1,$len
+        jnz     .Lcloop1
+        jmp     .Lexit
+.size   RC4,.-RC4
+___
+
+$code =~ s/#([bwd])/$1/gm;
+
+$code =~ s/repret/.byte\t0xF3,0xC3/gm;
+
+print $code;