1 files changed, 504 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..544386bf53
--- /dev/null
+++ b/src/lib/libcrypto/rc4/asm/rc4-x86_64.pl
@@ -0,0 +1,504 @@
+#!/usr/bin/env perl
+#
+# ====================================================================
+# 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/.
+# ====================================================================
+#
+# 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* Opteron, 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 was 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...
+
+# P4 EM64T core appears to be "allergic" to 64-bit inc/dec. Replacing 
+# those with add/sub results in 50% performance improvement of folded
+# loop...
+
+# As was shown by Zou Nanhai loop unrolling can improve Intel EM64T
+# performance by >30% [unlike P4 32-bit case that is]. But this is
+# provided that loads are reordered even more aggressively! Both code
+# pathes, AMD64 and EM64T, reorder loads in essentially same manner
+# as my IA-64 implementation. On Opteron this resulted in modest 5%
+# improvement [I had to test it], while final Intel P4 performance
+# achieves respectful 432MBps on 2.8GHz processor now. For reference.
+# If executed on Xeon, current RC4_CHAR code-path is 2.7x faster than
+# RC4_INT code-path. While if executed on Opteron, it's only 25%
+# slower than the RC4_INT one [meaning that if CPU µ-arch detection
+# is not implemented, then this final RC4_CHAR code-path should be
+# preferred, as it provides better *all-round* performance].
+
+# Intel Core2 was observed to perform poorly on both code paths:-( It
+# apparently suffers from some kind of partial register stall, which
+# occurs in 64-bit mode only [as virtually identical 32-bit loop was
+# observed to outperform 64-bit one by almost 50%]. Adding two movzb to
+# cloop1 boosts its performance by 80%! This loop appears to be optimal
+# fit for Core2 and therefore the code was modified to skip cloop8 on
+# this CPU.
+
+$flavour = shift;
+$output  = shift;
+if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
+
+$win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
+
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
+( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
+die "can't locate x86_64-xlate.pl";
+
+open STDOUT,"| $^X $xlate $flavour $output";
+
+$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,4
+.align  16
+RC4:    or      $len,$len
+        jne     .Lentry
+        ret
+.Lentry:
+        push    %rbx
+        push    %r12
+        push    %r13
+.Lprologue:
+
+        add     \$8,$dat
+        movl    -8($dat),$XX[0]#d
+        movl    -4($dat),$YY#d
+        cmpl    \$-1,256($dat)
+        je      .LRC4_CHAR
+        inc     $XX[0]#b
+        movl    ($dat,$XX[0],4),$TX[0]#d
+        test    \$-8,$len
+        jz      .Lloop1
+        jmp     .Lloop8
+.align  16
+.Lloop8:
+___
+for ($i=0;$i<8;$i++) {
+$code.=<<___;
+        add     $TX[0]#b,$YY#b
+        mov     $XX[0],$XX[1]
+        movl    ($dat,$YY,4),$TY#d
+        ror     \$8,%rax                        # ror is redundant when $i=0
+        inc     $XX[1]#b
+        movl    ($dat,$XX[1],4),$TX[1]#d
+        cmp     $XX[1],$YY
+        movl    $TX[0]#d,($dat,$YY,4)
+        cmove   $TX[0],$TX[1]
+        movl    $TY#d,($dat,$XX[0],4)
+        add     $TX[0]#b,$TY#b
+        movb    ($dat,$TY,4),%al
+___
+push(@TX,shift(@TX)); push(@XX,shift(@XX));     # "rotate" registers
+}
+$code.=<<___;
+        ror     \$8,%rax
+        sub     \$8,$len
+
+        xor     ($inp),%rax
+        add     \$8,$inp
+        mov     %rax,($out)
+        add     \$8,$out
+
+        test    \$-8,$len
+        jnz     .Lloop8
+        cmp     \$0,$len
+        jne     .Lloop1
+        jmp     .Lexit
+
+.align  16
+.Lloop1:
+        add     $TX[0]#b,$YY#b
+        movl    ($dat,$YY,4),$TY#d
+        movl    $TX[0]#d,($dat,$YY,4)
+        movl    $TY#d,($dat,$XX[0],4)
+        add     $TY#b,$TX[0]#b
+        inc     $XX[0]#b
+        movl    ($dat,$TX[0],4),$TY#d
+        movl    ($dat,$XX[0],4),$TX[0]#d
+        xorb    ($inp),$TY#b
+        inc     $inp
+        movb    $TY#b,($out)
+        inc     $out
+        dec     $len
+        jnz     .Lloop1
+        jmp     .Lexit
+
+.align  16
+.LRC4_CHAR:
+        add     \$1,$XX[0]#b
+        movzb   ($dat,$XX[0]),$TX[0]#d
+        test    \$-8,$len
+        jz      .Lcloop1
+        cmpl    \$0,260($dat)
+        jnz     .Lcloop1
+        jmp     .Lcloop8
+.align  16
+.Lcloop8:
+        mov     ($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
+        cmp     \$0,$len
+        jne     .Lcloop1
+        jmp     .Lexit
+___
+$code.=<<___;
+.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   $TY#b,$TY#d
+        movzb   $XX[0]#b,$XX[0]#d
+        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,$len
+        jnz     .Lcloop1
+        jmp     .Lexit
+
+.align  16
+.Lexit:
+        sub     \$1,$XX[0]#b
+        movl    $XX[0]#d,-8($dat)
+        movl    $YY#d,-4($dat)
+
+        mov     (%rsp),%r13
+        mov     8(%rsp),%r12
+        mov     16(%rsp),%rbx
+        add     \$24,%rsp
+.Lepilogue:
+        ret
+.size   RC4,.-RC4
+___
+
+$idx="%r8";
+$ido="%r9";
+
+$code.=<<___;
+.extern OPENSSL_ia32cap_P
+.globl  RC4_set_key
+.type   RC4_set_key,\@function,3
+.align  16
+RC4_set_key:
+        lea     8($dat),$dat
+        lea     ($inp,$len),$inp
+        neg     $len
+        mov     $len,%rcx
+        xor     %eax,%eax
+        xor     $ido,$ido
+        xor     %r10,%r10
+        xor     %r11,%r11
+
+        mov     PIC_GOT(OPENSSL_ia32cap_P),$idx#d
+        bt      \$20,$idx#d
+        jnc     .Lw1stloop
+        bt      \$30,$idx#d
+        setc    $ido#b
+        mov     $ido#d,260($dat)
+        jmp     .Lc1stloop
+
+.align  16
+.Lw1stloop:
+        mov     %eax,($dat,%rax,4)
+        add     \$1,%al
+        jnc     .Lw1stloop
+
+        xor     $ido,$ido
+        xor     $idx,$idx
+.align  16
+.Lw2ndloop:
+        mov     ($dat,$ido,4),%r10d
+        add     ($inp,$len,1),$idx#b
+        add     %r10b,$idx#b
+        add     \$1,$len
+        mov     ($dat,$idx,4),%r11d
+        cmovz   %rcx,$len
+        mov     %r10d,($dat,$idx,4)
+        mov     %r11d,($dat,$ido,4)
+        add     \$1,$ido#b
+        jnc     .Lw2ndloop
+        jmp     .Lexit_key
+
+.align  16
+.Lc1stloop:
+        mov     %al,($dat,%rax)
+        add     \$1,%al
+        jnc     .Lc1stloop
+
+        xor     $ido,$ido
+        xor     $idx,$idx
+.align  16
+.Lc2ndloop:
+        mov     ($dat,$ido),%r10b
+        add     ($inp,$len),$idx#b
+        add     %r10b,$idx#b
+        add     \$1,$len
+        mov     ($dat,$idx),%r11b
+        jnz     .Lcnowrap
+        mov     %rcx,$len
+.Lcnowrap:
+        mov     %r10b,($dat,$idx)
+        mov     %r11b,($dat,$ido)
+        add     \$1,$ido#b
+        jnc     .Lc2ndloop
+        movl    \$-1,256($dat)
+
+.align  16
+.Lexit_key:
+        xor     %eax,%eax
+        mov     %eax,-8($dat)
+        mov     %eax,-4($dat)
+        ret
+.size   RC4_set_key,.-RC4_set_key
+
+.globl  RC4_options
+.type   RC4_options,\@abi-omnipotent
+.align  16
+RC4_options:
+        lea     .Lopts(%rip),%rax
+        mov     PIC_GOT(OPENSSL_ia32cap_P),%edx
+        bt      \$20,%edx
+        jnc     .Ldone
+        add     \$12,%rax
+        bt      \$30,%edx
+        jnc     .Ldone
+        add     \$13,%rax
+.Ldone:
+        ret
+.align  64
+.Lopts:
+.asciz  "rc4(8x,int)"
+.asciz  "rc4(8x,char)"
+.asciz  "rc4(1x,char)"
+.asciz  "RC4 for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
+.align  64
+.size   RC4_options,.-RC4_options
+___
+
+# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
+#               CONTEXT *context,DISPATCHER_CONTEXT *disp)
+if ($win64) {
+$rec="%rcx";
+$frame="%rdx";
+$context="%r8";
+$disp="%r9";
+
+$code.=<<___;
+.extern __imp_RtlVirtualUnwind
+.type   stream_se_handler,\@abi-omnipotent
+.align  16
+stream_se_handler:
+        push    %rsi
+        push    %rdi
+        push    %rbx
+        push    %rbp
+        push    %r12
+        push    %r13
+        push    %r14
+        push    %r15
+        pushfq
+        sub     \$64,%rsp
+
+        mov     120($context),%rax      # pull context->Rax
+        mov     248($context),%rbx      # pull context->Rip
+
+        lea     .Lprologue(%rip),%r10
+        cmp     %r10,%rbx               # context->Rip<prologue label
+        jb      .Lin_prologue
+
+        mov     152($context),%rax      # pull context->Rsp
+
+        lea     .Lepilogue(%rip),%r10
+        cmp     %r10,%rbx               # context->Rip>=epilogue label
+        jae     .Lin_prologue
+
+        lea     24(%rax),%rax
+
+        mov     -8(%rax),%rbx
+        mov     -16(%rax),%r12
+        mov     -24(%rax),%r13
+        mov     %rbx,144($context)      # restore context->Rbx
+        mov     %r12,216($context)      # restore context->R12
+        mov     %r13,224($context)      # restore context->R13
+
+.Lin_prologue:
+        mov     8(%rax),%rdi
+        mov     16(%rax),%rsi
+        mov     %rax,152($context)      # restore context->Rsp
+        mov     %rsi,168($context)      # restore context->Rsi
+        mov     %rdi,176($context)      # restore context->Rdi
+
+        jmp     .Lcommon_seh_exit
+.size   stream_se_handler,.-stream_se_handler
+
+.type   key_se_handler,\@abi-omnipotent
+.align  16
+key_se_handler:
+        push    %rsi
+        push    %rdi
+        push    %rbx
+        push    %rbp
+        push    %r12
+        push    %r13
+        push    %r14
+        push    %r15
+        pushfq
+        sub     \$64,%rsp
+
+        mov     152($context),%rax      # pull context->Rsp
+        mov     8(%rax),%rdi
+        mov     16(%rax),%rsi
+        mov     %rsi,168($context)      # restore context->Rsi
+        mov     %rdi,176($context)      # restore context->Rdi
+
+.Lcommon_seh_exit:
+
+        mov     40($disp),%rdi          # disp->ContextRecord
+        mov     $context,%rsi           # context
+        mov     \$154,%ecx              # sizeof(CONTEXT)
+        .long   0xa548f3fc              # cld; rep movsq
+
+        mov     $disp,%rsi
+        xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
+        mov     8(%rsi),%rdx            # arg2, disp->ImageBase
+        mov     0(%rsi),%r8             # arg3, disp->ControlPc
+        mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
+        mov     40(%rsi),%r10           # disp->ContextRecord
+        lea     56(%rsi),%r11           # &disp->HandlerData
+        lea     24(%rsi),%r12           # &disp->EstablisherFrame
+        mov     %r10,32(%rsp)           # arg5
+        mov     %r11,40(%rsp)           # arg6
+        mov     %r12,48(%rsp)           # arg7
+        mov     %rcx,56(%rsp)           # arg8, (NULL)
+        call    *__imp_RtlVirtualUnwind(%rip)
+
+        mov     \$1,%eax                # ExceptionContinueSearch
+        add     \$64,%rsp
+        popfq
+        pop     %r15
+        pop     %r14
+        pop     %r13
+        pop     %r12
+        pop     %rbp
+        pop     %rbx
+        pop     %rdi
+        pop     %rsi
+        ret
+.size   key_se_handler,.-key_se_handler
+
+.section        .pdata
+.align  4
+        .rva    .LSEH_begin_RC4
+        .rva    .LSEH_end_RC4
+        .rva    .LSEH_info_RC4
+
+        .rva    .LSEH_begin_RC4_set_key
+        .rva    .LSEH_end_RC4_set_key
+        .rva    .LSEH_info_RC4_set_key
+
+.section        .xdata
+.align  8
+.LSEH_info_RC4:
+        .byte   9,0,0,0
+        .rva    stream_se_handler
+.LSEH_info_RC4_set_key:
+        .byte   9,0,0,0
+        .rva    key_se_handler
+___
+}
+
+$code =~ s/#([bwd])/$1/gm;
+
+print $code;
+
+close STDOUT;