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openssl/engines/asm/e_padlock-x86.pl
Richard Levitte 1aa89a7a3a Unify all assembler file generators 
They now generally conform to the following argument sequence:

    script.pl "$(PERLASM_SCHEME)" [ C preprocessor arguments ... ] \
              $(PROCESSOR) <output file>

However, in the spirit of being able to use these scripts manually,
they also allow for no argument, or for only the flavour, or for only
the output file.  This is done by only using the last argument as
output file if it's a file (it has an extension), and only using the
first argument as flavour if it isn't a file (it doesn't have an
extension).

While we're at it, we make all $xlate calls the same, i.e. the $output
argument is always quoted, and we always die on error when trying to
start $xlate.

There's a perl lesson in this, regarding operator priority...

This will always succeed, even when it fails:

    open FOO, "something" || die "ERR: $!";

The reason is that '||' has higher priority than list operators (a
function is essentially a list operator and gobbles up everything
following it that isn't lower priority), and since a non-empty string
is always true, so that ends up being exactly the same as:

    open FOO, "something";

This, however, will fail if "something" can't be opened:

    open FOO, "something" or die "ERR: $!";

The reason is that 'or' has lower priority that list operators,
i.e. it's performed after the 'open' call.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9884)
2019-09-16 16:29:57 +02:00

627 lines
18 KiB
Perl
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#! /usr/bin/env perl
# Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> 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/.
# ====================================================================
# September 2011
#
# Assembler helpers for Padlock engine. Compared to original engine
# version relying on inline assembler and compiled with gcc 3.4.6 it
# was measured to provide ~100% improvement on misaligned data in ECB
# mode and ~75% in CBC mode. For aligned data improvement can be
# observed for short inputs only, e.g. 45% for 64-byte messages in
# ECB mode, 20% in CBC. Difference in performance for aligned vs.
# misaligned data depends on misalignment and is either ~1.8x or 2.9x.
# These are approximately same factors as for hardware support, so
# there is little reason to rely on the latter. On the contrary, it
# might actually hurt performance in mixture of aligned and misaligned
# buffers, because a) if you choose to flip 'align' flag in control
# word on per-buffer basis, then you'd have to reload key context,
# which incurs penalty; b) if you choose to set 'align' flag
# permanently, it limits performance even for aligned data to ~1/2.
# All above mentioned results were collected on 1.5GHz C7. Nano on the
# other hand handles unaligned data more gracefully. Depending on
# algorithm and how unaligned data is, hardware can be up to 70% more
# efficient than below software alignment procedures, nor does 'align'
# flag have affect on aligned performance [if has any meaning at all].
# Therefore suggestion is to unconditionally set 'align' flag on Nano
# for optimal performance.
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../crypto/perlasm");
require "x86asm.pl";
$output=pop and open STDOUT,">$output";
&asm_init($ARGV[0]);
%PADLOCK_PREFETCH=(ecb=>128, cbc=>64); # prefetch errata
$PADLOCK_CHUNK=512; # Must be a power of 2 larger than 16
$ctx="edx";
$out="edi";
$inp="esi";
$len="ecx";
$chunk="ebx";
&function_begin_B("padlock_capability");
&push ("ebx");
&pushf ();
&pop ("eax");
&mov ("ecx","eax");
&xor ("eax",1<<21);
&push ("eax");
&popf ();
&pushf ();
&pop ("eax");
&xor ("ecx","eax");
&xor ("eax","eax");
&bt ("ecx",21);
&jnc (&label("noluck"));
&cpuid ();
&xor ("eax","eax");
&cmp ("ebx","0x".unpack("H*",'tneC'));
&jne (&label("zhaoxin"));
&cmp ("edx","0x".unpack("H*",'Hrua'));
&jne (&label("noluck"));
&cmp ("ecx","0x".unpack("H*",'slua'));
&jne (&label("noluck"));
&jmp (&label("zhaoxinEnd"));
&set_label("zhaoxin");
&cmp ("ebx","0x".unpack("H*",'hS '));
&jne (&label("noluck"));
&cmp ("edx","0x".unpack("H*",'hgna'));
&jne (&label("noluck"));
&cmp ("ecx","0x".unpack("H*",' ia'));
&jne (&label("noluck"));
&set_label("zhaoxinEnd");
&mov ("eax",0xC0000000);
&cpuid ();
&mov ("edx","eax");
&xor ("eax","eax");
&cmp ("edx",0xC0000001);
&jb (&label("noluck"));
&mov ("eax",1);
&cpuid ();
&or ("eax",0x0f);
&xor ("ebx","ebx");
&and ("eax",0x0fff);
&cmp ("eax",0x06ff); # check for Nano
&sete ("bl");
&mov ("eax",0xC0000001);
&push ("ebx");
&cpuid ();
&pop ("ebx");
&mov ("eax","edx");
&shl ("ebx",4); # bit#4 denotes Nano
&and ("eax",0xffffffef);
&or ("eax","ebx")
&set_label("noluck");
&pop ("ebx");
&ret ();
&function_end_B("padlock_capability")
&function_begin_B("padlock_key_bswap");
&mov ("edx",&wparam(0));
&mov ("ecx",&DWP(240,"edx"));
&set_label("bswap_loop");
&mov ("eax",&DWP(0,"edx"));
&bswap ("eax");
&mov (&DWP(0,"edx"),"eax");
&lea ("edx",&DWP(4,"edx"));
&sub ("ecx",1);
&jnz (&label("bswap_loop"));
&ret ();
&function_end_B("padlock_key_bswap");
# This is heuristic key context tracing. At first one
# believes that one should use atomic swap instructions,
# but it's not actually necessary. Point is that if
# padlock_saved_context was changed by another thread
# after we've read it and before we compare it with ctx,
# our key *shall* be reloaded upon thread context switch
# and we are therefore set in either case...
&static_label("padlock_saved_context");
&function_begin_B("padlock_verify_context");
&mov ($ctx,&wparam(0));
&lea ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
&DWP(&label("padlock_saved_context")."-".&label("verify_pic_point")));
&pushf ();
&call ("_padlock_verify_ctx");
&set_label("verify_pic_point");
&lea ("esp",&DWP(4,"esp"));
&ret ();
&function_end_B("padlock_verify_context");
&function_begin_B("_padlock_verify_ctx");
&add ("eax",&DWP(0,"esp")) if(!($::win32 or $::coff));# &padlock_saved_context
&bt (&DWP(4,"esp"),30); # eflags
&jnc (&label("verified"));
&cmp ($ctx,&DWP(0,"eax"));
&je (&label("verified"));
&pushf ();
&popf ();
&set_label("verified");
&mov (&DWP(0,"eax"),$ctx);
&ret ();
&function_end_B("_padlock_verify_ctx");
&function_begin_B("padlock_reload_key");
&pushf ();
&popf ();
&ret ();
&function_end_B("padlock_reload_key");
&function_begin_B("padlock_aes_block");
&push ("edi");
&push ("esi");
&push ("ebx");
&mov ($out,&wparam(0)); # must be 16-byte aligned
&mov ($inp,&wparam(1)); # must be 16-byte aligned
&mov ($ctx,&wparam(2));
&mov ($len,1);
&lea ("ebx",&DWP(32,$ctx)); # key
&lea ($ctx,&DWP(16,$ctx)); # control word
&data_byte(0xf3,0x0f,0xa7,0xc8); # rep xcryptecb
&pop ("ebx");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_aes_block");
sub generate_mode {
my ($mode,$opcode) = @_;
# int padlock_$mode_encrypt(void *out, const void *inp,
# struct padlock_cipher_data *ctx, size_t len);
&function_begin("padlock_${mode}_encrypt");
&mov ($out,&wparam(0));
&mov ($inp,&wparam(1));
&mov ($ctx,&wparam(2));
&mov ($len,&wparam(3));
&test ($ctx,15);
&jnz (&label("${mode}_abort"));
&test ($len,15);
&jnz (&label("${mode}_abort"));
&lea ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
&DWP(&label("padlock_saved_context")."-".&label("${mode}_pic_point")));
&pushf ();
&cld ();
&call ("_padlock_verify_ctx");
&set_label("${mode}_pic_point");
&lea ($ctx,&DWP(16,$ctx)); # control word
&xor ("eax","eax");
if ($mode eq "ctr32") {
&movq ("mm0",&QWP(-16,$ctx)); # load [upper part of] counter
} else {
&xor ("ebx","ebx");
&test (&DWP(0,$ctx),1<<5); # align bit in control word
&jnz (&label("${mode}_aligned"));
&test ($out,0x0f);
&setz ("al"); # !out_misaligned
&test ($inp,0x0f);
&setz ("bl"); # !inp_misaligned
&test ("eax","ebx");
&jnz (&label("${mode}_aligned"));
&neg ("eax");
}
&mov ($chunk,$PADLOCK_CHUNK);
&not ("eax"); # out_misaligned?-1:0
&lea ("ebp",&DWP(-24,"esp"));
&cmp ($len,$chunk);
&cmovc ($chunk,$len); # chunk=len>PADLOCK_CHUNK?PADLOCK_CHUNK:len
&and ("eax",$chunk); # out_misaligned?chunk:0
&mov ($chunk,$len);
&neg ("eax");
&and ($chunk,$PADLOCK_CHUNK-1); # chunk=len%PADLOCK_CHUNK
&lea ("esp",&DWP(0,"eax","ebp")); # alloca
&mov ("eax",$PADLOCK_CHUNK);
&cmovz ($chunk,"eax"); # chunk=chunk?:PADLOCK_CHUNK
&mov ("eax","ebp");
&and ("ebp",-16);
&and ("esp",-16);
&mov (&DWP(16,"ebp"),"eax");
if ($PADLOCK_PREFETCH{$mode}) {
&cmp ($len,$chunk);
&ja (&label("${mode}_loop"));
&mov ("eax",$inp); # check if prefetch crosses page
&cmp ("ebp","esp");
&cmove ("eax",$out);
&add ("eax",$len);
&neg ("eax");
&and ("eax",0xfff); # distance to page boundary
&cmp ("eax",$PADLOCK_PREFETCH{$mode});
&mov ("eax",-$PADLOCK_PREFETCH{$mode});
&cmovae ("eax",$chunk); # mask=distance<prefetch?-prefetch:-1
&and ($chunk,"eax");
&jz (&label("${mode}_unaligned_tail"));
}
&jmp (&label("${mode}_loop"));
&set_label("${mode}_loop",16);
&mov (&DWP(0,"ebp"),$out); # save parameters
&mov (&DWP(4,"ebp"),$inp);
&mov (&DWP(8,"ebp"),$len);
&mov ($len,$chunk);
&mov (&DWP(12,"ebp"),$chunk); # chunk
if ($mode eq "ctr32") {
&mov ("ecx",&DWP(-4,$ctx));
&xor ($out,$out);
&mov ("eax",&DWP(-8,$ctx)); # borrow $len
&set_label("${mode}_prepare");
&mov (&DWP(12,"esp",$out),"ecx");
&bswap ("ecx");
&movq (&QWP(0,"esp",$out),"mm0");
&inc ("ecx");
&mov (&DWP(8,"esp",$out),"eax");
&bswap ("ecx");
&lea ($out,&DWP(16,$out));
&cmp ($out,$chunk);
&jb (&label("${mode}_prepare"));
&mov (&DWP(-4,$ctx),"ecx");
&lea ($inp,&DWP(0,"esp"));
&lea ($out,&DWP(0,"esp"));
&mov ($len,$chunk);
} else {
&test ($out,0x0f); # out_misaligned
&cmovnz ($out,"esp");
&test ($inp,0x0f); # inp_misaligned
&jz (&label("${mode}_inp_aligned"));
&shr ($len,2);
&data_byte(0xf3,0xa5); # rep movsl
&sub ($out,$chunk);
&mov ($len,$chunk);
&mov ($inp,$out);
&set_label("${mode}_inp_aligned");
}
&lea ("eax",&DWP(-16,$ctx)); # ivp
&lea ("ebx",&DWP(16,$ctx)); # key
&shr ($len,4); # len/=AES_BLOCK_SIZE
&data_byte(0xf3,0x0f,0xa7,$opcode); # rep xcrypt*
if ($mode !~ /ecb|ctr/) {
&movaps ("xmm0",&QWP(0,"eax"));
&movaps (&QWP(-16,$ctx),"xmm0"); # copy [or refresh] iv
}
&mov ($out,&DWP(0,"ebp")); # restore parameters
&mov ($chunk,&DWP(12,"ebp"));
if ($mode eq "ctr32") {
&mov ($inp,&DWP(4,"ebp"));
&xor ($len,$len);
&set_label("${mode}_xor");
&movups ("xmm1",&QWP(0,$inp,$len));
&lea ($len,&DWP(16,$len));
&pxor ("xmm1",&QWP(-16,"esp",$len));
&movups (&QWP(-16,$out,$len),"xmm1");
&cmp ($len,$chunk);
&jb (&label("${mode}_xor"));
} else {
&test ($out,0x0f);
&jz (&label("${mode}_out_aligned"));
&mov ($len,$chunk);
&lea ($inp,&DWP(0,"esp"));
&shr ($len,2);
&data_byte(0xf3,0xa5); # rep movsl
&sub ($out,$chunk);
&set_label("${mode}_out_aligned");
&mov ($inp,&DWP(4,"ebp"));
}
&mov ($len,&DWP(8,"ebp"));
&add ($out,$chunk);
&add ($inp,$chunk);
&sub ($len,$chunk);
&mov ($chunk,$PADLOCK_CHUNK);
if (!$PADLOCK_PREFETCH{$mode}) {
&jnz (&label("${mode}_loop"));
} else {
&jz (&label("${mode}_break"));
&cmp ($len,$chunk);
&jae (&label("${mode}_loop"));
&set_label("${mode}_unaligned_tail");
&xor ("eax","eax");
&cmp ("esp","ebp");
&cmove ("eax",$len);
&sub ("esp","eax"); # alloca
&mov ("eax", $out); # save parameters
&mov ($chunk,$len);
&shr ($len,2);
&lea ($out,&DWP(0,"esp"));
&data_byte(0xf3,0xa5); # rep movsl
&mov ($inp,"esp");
&mov ($out,"eax"); # restore parameters
&mov ($len,$chunk);
&jmp (&label("${mode}_loop"));
&set_label("${mode}_break",16);
}
if ($mode ne "ctr32") {
&cmp ("esp","ebp");
&je (&label("${mode}_done"));
}
&pxor ("xmm0","xmm0");
&lea ("eax",&DWP(0,"esp"));
&set_label("${mode}_bzero");
&movaps (&QWP(0,"eax"),"xmm0");
&lea ("eax",&DWP(16,"eax"));
&cmp ("ebp","eax");
&ja (&label("${mode}_bzero"));
&set_label("${mode}_done");
&mov ("ebp",&DWP(16,"ebp"));
&lea ("esp",&DWP(24,"ebp"));
if ($mode ne "ctr32") {
&jmp (&label("${mode}_exit"));
&set_label("${mode}_aligned",16);
if ($PADLOCK_PREFETCH{$mode}) {
&lea ("ebp",&DWP(0,$inp,$len));
&neg ("ebp");
&and ("ebp",0xfff); # distance to page boundary
&xor ("eax","eax");
&cmp ("ebp",$PADLOCK_PREFETCH{$mode});
&mov ("ebp",$PADLOCK_PREFETCH{$mode}-1);
&cmovae ("ebp","eax");
&and ("ebp",$len); # remainder
&sub ($len,"ebp");
&jz (&label("${mode}_aligned_tail"));
}
&lea ("eax",&DWP(-16,$ctx)); # ivp
&lea ("ebx",&DWP(16,$ctx)); # key
&shr ($len,4); # len/=AES_BLOCK_SIZE
&data_byte(0xf3,0x0f,0xa7,$opcode); # rep xcrypt*
if ($mode ne "ecb") {
&movaps ("xmm0",&QWP(0,"eax"));
&movaps (&QWP(-16,$ctx),"xmm0"); # copy [or refresh] iv
}
if ($PADLOCK_PREFETCH{$mode}) {
&test ("ebp","ebp");
&jz (&label("${mode}_exit"));
&set_label("${mode}_aligned_tail");
&mov ($len,"ebp");
&lea ("ebp",&DWP(-24,"esp"));
&mov ("esp","ebp");
&mov ("eax","ebp");
&sub ("esp",$len);
&and ("ebp",-16);
&and ("esp",-16);
&mov (&DWP(16,"ebp"),"eax");
&mov ("eax", $out); # save parameters
&mov ($chunk,$len);
&shr ($len,2);
&lea ($out,&DWP(0,"esp"));
&data_byte(0xf3,0xa5); # rep movsl
&mov ($inp,"esp");
&mov ($out,"eax"); # restore parameters
&mov ($len,$chunk);
&jmp (&label("${mode}_loop"));
}
&set_label("${mode}_exit"); }
&mov ("eax",1);
&lea ("esp",&DWP(4,"esp")); # popf
&emms () if ($mode eq "ctr32");
&set_label("${mode}_abort");
&function_end("padlock_${mode}_encrypt");
}
&generate_mode("ecb",0xc8);
&generate_mode("cbc",0xd0);
&generate_mode("cfb",0xe0);
&generate_mode("ofb",0xe8);
&generate_mode("ctr32",0xc8); # yes, it implements own CTR with ECB opcode,
# because hardware CTR was introduced later
# and even has errata on certain C7 stepping.
# own implementation *always* works, though
# ~15% slower than dedicated hardware...
&function_begin_B("padlock_xstore");
&push ("edi");
&mov ("edi",&wparam(0));
&mov ("edx",&wparam(1));
&data_byte(0x0f,0xa7,0xc0); # xstore
&pop ("edi");
&ret ();
&function_end_B("padlock_xstore");
&function_begin_B("_win32_segv_handler");
&mov ("eax",1); # ExceptionContinueSearch
&mov ("edx",&wparam(0)); # *ExceptionRecord
&mov ("ecx",&wparam(2)); # *ContextRecord
&cmp (&DWP(0,"edx"),0xC0000005) # ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION
&jne (&label("ret"));
&add (&DWP(184,"ecx"),4); # skip over rep sha*
&mov ("eax",0); # ExceptionContinueExecution
&set_label("ret");
&ret ();
&function_end_B("_win32_segv_handler");
&safeseh("_win32_segv_handler") if ($::win32);
&function_begin_B("padlock_sha1_oneshot");
&push ("edi");
&push ("esi");
&xor ("eax","eax");
&mov ("edi",&wparam(0));
&mov ("esi",&wparam(1));
&mov ("ecx",&wparam(2));
if ($::win32 or $::coff) {
&push (&::islabel("_win32_segv_handler"));
&data_byte(0x64,0xff,0x30); # push %fs:(%eax)
&data_byte(0x64,0x89,0x20); # mov %esp,%fs:(%eax)
}
&mov ("edx","esp"); # put aside %esp
&add ("esp",-128); # 32 is enough but spec says 128
&movups ("xmm0",&QWP(0,"edi")); # copy-in context
&and ("esp",-16);
&mov ("eax",&DWP(16,"edi"));
&movaps (&QWP(0,"esp"),"xmm0");
&mov ("edi","esp");
&mov (&DWP(16,"esp"),"eax");
&xor ("eax","eax");
&data_byte(0xf3,0x0f,0xa6,0xc8); # rep xsha1
&movaps ("xmm0",&QWP(0,"esp"));
&mov ("eax",&DWP(16,"esp"));
&mov ("esp","edx"); # restore %esp
if ($::win32 or $::coff) {
&data_byte(0x64,0x8f,0x05,0,0,0,0); # pop %fs:0
&lea ("esp",&DWP(4,"esp"));
}
&mov ("edi",&wparam(0));
&movups (&QWP(0,"edi"),"xmm0"); # copy-out context
&mov (&DWP(16,"edi"),"eax");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_sha1_oneshot");
&function_begin_B("padlock_sha1_blocks");
&push ("edi");
&push ("esi");
&mov ("edi",&wparam(0));
&mov ("esi",&wparam(1));
&mov ("edx","esp"); # put aside %esp
&mov ("ecx",&wparam(2));
&add ("esp",-128);
&movups ("xmm0",&QWP(0,"edi")); # copy-in context
&and ("esp",-16);
&mov ("eax",&DWP(16,"edi"));
&movaps (&QWP(0,"esp"),"xmm0");
&mov ("edi","esp");
&mov (&DWP(16,"esp"),"eax");
&mov ("eax",-1);
&data_byte(0xf3,0x0f,0xa6,0xc8); # rep xsha1
&movaps ("xmm0",&QWP(0,"esp"));
&mov ("eax",&DWP(16,"esp"));
&mov ("esp","edx"); # restore %esp
&mov ("edi",&wparam(0));
&movups (&QWP(0,"edi"),"xmm0"); # copy-out context
&mov (&DWP(16,"edi"),"eax");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_sha1_blocks");
&function_begin_B("padlock_sha256_oneshot");
&push ("edi");
&push ("esi");
&xor ("eax","eax");
&mov ("edi",&wparam(0));
&mov ("esi",&wparam(1));
&mov ("ecx",&wparam(2));
if ($::win32 or $::coff) {
&push (&::islabel("_win32_segv_handler"));
&data_byte(0x64,0xff,0x30); # push %fs:(%eax)
&data_byte(0x64,0x89,0x20); # mov %esp,%fs:(%eax)
}
&mov ("edx","esp"); # put aside %esp
&add ("esp",-128);
&movups ("xmm0",&QWP(0,"edi")); # copy-in context
&and ("esp",-16);
&movups ("xmm1",&QWP(16,"edi"));
&movaps (&QWP(0,"esp"),"xmm0");
&mov ("edi","esp");
&movaps (&QWP(16,"esp"),"xmm1");
&xor ("eax","eax");
&data_byte(0xf3,0x0f,0xa6,0xd0); # rep xsha256
&movaps ("xmm0",&QWP(0,"esp"));
&movaps ("xmm1",&QWP(16,"esp"));
&mov ("esp","edx"); # restore %esp
if ($::win32 or $::coff) {
&data_byte(0x64,0x8f,0x05,0,0,0,0); # pop %fs:0
&lea ("esp",&DWP(4,"esp"));
}
&mov ("edi",&wparam(0));
&movups (&QWP(0,"edi"),"xmm0"); # copy-out context
&movups (&QWP(16,"edi"),"xmm1");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_sha256_oneshot");
&function_begin_B("padlock_sha256_blocks");
&push ("edi");
&push ("esi");
&mov ("edi",&wparam(0));
&mov ("esi",&wparam(1));
&mov ("ecx",&wparam(2));
&mov ("edx","esp"); # put aside %esp
&add ("esp",-128);
&movups ("xmm0",&QWP(0,"edi")); # copy-in context
&and ("esp",-16);
&movups ("xmm1",&QWP(16,"edi"));
&movaps (&QWP(0,"esp"),"xmm0");
&mov ("edi","esp");
&movaps (&QWP(16,"esp"),"xmm1");
&mov ("eax",-1);
&data_byte(0xf3,0x0f,0xa6,0xd0); # rep xsha256
&movaps ("xmm0",&QWP(0,"esp"));
&movaps ("xmm1",&QWP(16,"esp"));
&mov ("esp","edx"); # restore %esp
&mov ("edi",&wparam(0));
&movups (&QWP(0,"edi"),"xmm0"); # copy-out context
&movups (&QWP(16,"edi"),"xmm1");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_sha256_blocks");
&function_begin_B("padlock_sha512_blocks");
&push ("edi");
&push ("esi");
&mov ("edi",&wparam(0));
&mov ("esi",&wparam(1));
&mov ("ecx",&wparam(2));
&mov ("edx","esp"); # put aside %esp
&add ("esp",-128);
&movups ("xmm0",&QWP(0,"edi")); # copy-in context
&and ("esp",-16);
&movups ("xmm1",&QWP(16,"edi"));
&movups ("xmm2",&QWP(32,"edi"));
&movups ("xmm3",&QWP(48,"edi"));
&movaps (&QWP(0,"esp"),"xmm0");
&mov ("edi","esp");
&movaps (&QWP(16,"esp"),"xmm1");
&movaps (&QWP(32,"esp"),"xmm2");
&movaps (&QWP(48,"esp"),"xmm3");
&data_byte(0xf3,0x0f,0xa6,0xe0); # rep xsha512
&movaps ("xmm0",&QWP(0,"esp"));
&movaps ("xmm1",&QWP(16,"esp"));
&movaps ("xmm2",&QWP(32,"esp"));
&movaps ("xmm3",&QWP(48,"esp"));
&mov ("esp","edx"); # restore %esp
&mov ("edi",&wparam(0));
&movups (&QWP(0,"edi"),"xmm0"); # copy-out context
&movups (&QWP(16,"edi"),"xmm1");
&movups (&QWP(32,"edi"),"xmm2");
&movups (&QWP(48,"edi"),"xmm3");
&pop ("esi");
&pop ("edi");
&ret ();
&function_end_B("padlock_sha512_blocks");
&asciz ("VIA Padlock x86 module, CRYPTOGAMS by <appro\@openssl.org>");
&align (16);
&dataseg();
# Essentially this variable belongs in thread local storage.
# Having this variable global on the other hand can only cause
# few bogus key reloads [if any at all on signle-CPU system],
# so we accept the penalty...
&set_label("padlock_saved_context",4);
&data_word(0);
&asm_finish();
close STDOUT;
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