use strict;

my $code .= <<EOF;

/

/ MD5 optimized for AMD64.

/

/ Author: Marc Bevand <bevand_m (at) epita.fr>

/ Licence: I hereby disclaim the copyright on this code and place it

/ in the public domain.

/

.ident "%Z%%M% %I% %E% SMI"

/

/ The following is Marc Bevand's MD5 implementation optimized for

/ AMD64. It has been lifted intact, except for changing the comment

/ character, adding comments, and a kludge to generate valid "lea"

/ instructions that are not generated by the Solaris "as" assembler

/ (CR 6628627).

/

/ typedef struct {

/ uint32_t state[4]; /* state (ABCD) */

/ uint32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */

/ union {

/ uint8_t buf8[64]; /* undigested input */

/ uint32_t buf32[16]; /* realigned input */

/ } buf_un;

/ } MD5_CTX;

/

/ void md5_block_asm_host_order(MD5_CTX *ctx, const void *inpp,

/ unsigned int input_length_in_blocks);

/

/ Registers used:

/ rax A r8 old A

/ rbx B r9 old B

/ rcx C r10 tmp

/ rdx D r11 tmp

/ rsi ptr r12 tmp

/ rdi end r13 -

/ rbp - r14 old C

/ rsp stack r15 old D

/

sub lea_offset_register_r10d_ebx

{

use Switch;

my ($offset, $register, $comment) = @_;

# Failed "lea" instruction.

# This instruction errors out from the Solaris as assembler.

# It assembles with the Linux "as --64" assembler and runs OK.

$code .= " / lea $offset($register,%r10d),$register"

. " $comment\n";

# Workaround #1 (not used)

# One workaround is to generate two "add" instructions that are

# functionally equivalent to "lea." The problem is this workaround

# is about 4.5% slower than a lea, so is not used.

#$code .= " add %r10d,$register\n";

#$code .= " add \&0x%0x,$offset\n";

# Workaround #2 (used)

# This workaround hand-generates hex machine code for lea.

$code .= " / Solaris as assembly bug CR 6628627 errors out for\n";

$code .= " / the above, so we specify the machine code in hex:\n";

$code .= " .byte 0x67,0x42,0x8d / lea offset(reg,%r10d),reg\n";

switch ($register) {

case "%eax" { $code .= " .byte 0x84,0x10 / reg=%eax\n"; }

case "%ebx" { $code .= " .byte 0x9c,0x13 / reg=%ebx\n"; }

case "%ecx" { $code .= " .byte 0x8c,0x11 / reg=%ecx\n"; }

case "%edx" { $code .= " .byte 0x94,0x12 / reg=%edx\n"; }

else { $code .= "ERROR: unknown register $register\n"; }

}

$code .= " .long $offset / offset\n";

}

sub round1_step

{

my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;

$code .= " mov 0*4(%rsi), %r10d /* (NEXT STEP) X[0] */\n" if ($pos == -1);

$code .= " mov %edx, %r11d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);

$code .= " xor $y, %r11d /* y ^ ... */\n";

#lea $T_i($dst,%r10d),$dst /* Const + dst + ... */

lea_offset_register_r10d_ebx($T_i, $dst, "/* Const + dst + ... */");

$code .= <<EOF;

and $x, %r11d /* x & ... */

xor $z, %r11d /* z ^ ... */

mov $k_next*4(%rsi),%r10d /* (NEXT STEP) X[$k_next] */

add %r11d, $dst /* dst += ... */

rol \$$s, $dst /* dst <<< s */

mov $y, %r11d /* (NEXT STEP) z' = $y */

add $x, $dst /* dst += x */

}

sub round2_step

{

my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;

$code .= " mov 1*4(%rsi), %r10d /* (NEXT STEP) X[1] */\n" if ($pos == -1);

$code .= " mov %edx, %r11d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);

$code .= " mov %edx, %r12d /* (NEXT STEP) z' = %edx */\n" if ($pos == -1);

$code .= " not %r11d /* not z */\n";

#lea $T_i($dst,%r10d),$dst /* Const + dst + ... */

lea_offset_register_r10d_ebx($T_i, $dst, "/* Const + dst + ... */");

$code .= <<EOF;

and $x, %r12d /* x & z */

and $y, %r11d /* y & (not z) */

mov $k_next*4(%rsi),%r10d /* (NEXT STEP) X[$k_next] */

or %r11d, %r12d /* (y & (not z)) | (x & z) */

mov $y, %r11d /* (NEXT STEP) z' = $y */

add %r12d, $dst /* dst += ... */

mov $y, %r12d /* (NEXT STEP) z' = $y */

rol \$$s, $dst /* dst <<< s */

add $x, $dst /* dst += x */

}

sub round3_step

{

my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;

$code .= " mov 5*4(%rsi), %r10d /* (NEXT STEP) X[5] */\n" if ($pos == -1);

$code .= " mov %ecx, %r11d /* (NEXT STEP) y' = %ecx */\n" if ($pos == -1);

#lea $T_i($dst,%r10d),$dst /* Const + dst + ... */

lea_offset_register_r10d_ebx($T_i, $dst, "/* Const + dst + ... */");

$code .= <<EOF;

mov $k_next*4(%rsi),%r10d /* (NEXT STEP) X[$k_next] */

xor $z, %r11d /* z ^ ... */

xor $x, %r11d /* x ^ ... */

add %r11d, $dst /* dst += ... */

rol \$$s, $dst /* dst <<< s */

mov $x, %r11d /* (NEXT STEP) y' = $x */

add $x, $dst /* dst += x */

}

sub round4_step

{

my ($pos, $dst, $x, $y, $z, $k_next, $T_i, $s) = @_;

$code .= " mov 0*4(%rsi), %r10d /* (NEXT STEP) X[0] */\n" if ($pos == -1);

$code .= " mov \$0xffffffff, %r11d\n" if ($pos == -1);

$code .= " xor %edx, %r11d /* (NEXT STEP) not z' = not %edx*/\n"

if ($pos == -1);

#lea $T_i($dst,%r10d),$dst /* Const + dst + ... */

lea_offset_register_r10d_ebx($T_i, $dst, "/* Const + dst + ... */");

$code .= <<EOF;

or $x, %r11d /* x | ... */

xor $y, %r11d /* y ^ ... */

add %r11d, $dst /* dst += ... */

mov $k_next*4(%rsi),%r10d /* (NEXT STEP) X[$k_next] */

mov \$0xffffffff, %r11d

rol \$$s, $dst /* dst <<< s */

xor $y, %r11d /* (NEXT STEP) not z' = not $y */

add $x, $dst /* dst += x */

}

my $output = shift;

open STDOUT,">$output" or die "can't open $output: $!";

$code .= <<EOF;

ENTRY_NP(md5_block_asm_host_order)

push %rbp

push %rbx

push %r12

push %r13

push %r14

push %r15

/ rdi = arg #1 (ctx, MD5_CTX pointer)

/ rsi = arg #2 (ptr, data pointer)

/ rdx = arg #3 (nbr, number of 64-byte blocks to process)

mov %rdi, %rbp / rbp = ctx

shl \$6, %rdx / rdx = nbr in bytes

lea (%rsi,%rdx), %rdi / rdi = end

mov 0*4(%rbp), %eax / eax = ctx->A

mov 1*4(%rbp), %ebx / ebx = ctx->B

mov 2*4(%rbp), %ecx / ecx = ctx->C

mov 3*4(%rbp), %edx / edx = ctx->D

push %rbp / save ctx

/ end is 'rdi'

/ ptr is 'rsi'

/ A is 'eax'

/ B is 'ebx'

/ C is 'ecx'

/ D is 'edx'

cmp %rdi, %rsi / cmp end with ptr

je 1f / jmp if ptr == end

/ BEGIN of loop over 64-byte blocks

2: / save old values of A, B, C, D

mov %eax, %r8d

mov %ebx, %r9d

mov %ecx, %r14d

mov %edx, %r15d

round1_step(-1,'%eax','%ebx','%ecx','%edx', '1','0xd76aa478', '7');

round1_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xe8c7b756','12');

round1_step( 0,'%ecx','%edx','%eax','%ebx', '3','0x242070db','17');

round1_step( 0,'%ebx','%ecx','%edx','%eax', '4','0xc1bdceee','22');

round1_step( 0,'%eax','%ebx','%ecx','%edx', '5','0xf57c0faf', '7');

round1_step( 0,'%edx','%eax','%ebx','%ecx', '6','0x4787c62a','12');

round1_step( 0,'%ecx','%edx','%eax','%ebx', '7','0xa8304613','17');

round1_step( 0,'%ebx','%ecx','%edx','%eax', '8','0xfd469501','22');

round1_step( 0,'%eax','%ebx','%ecx','%edx', '9','0x698098d8', '7');

round1_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8b44f7af','12');

round1_step( 0,'%ecx','%edx','%eax','%ebx','11','0xffff5bb1','17');

round1_step( 0,'%ebx','%ecx','%edx','%eax','12','0x895cd7be','22');

round1_step( 0,'%eax','%ebx','%ecx','%edx','13','0x6b901122', '7');

round1_step( 0,'%edx','%eax','%ebx','%ecx','14','0xfd987193','12');

round1_step( 0,'%ecx','%edx','%eax','%ebx','15','0xa679438e','17');

round1_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x49b40821','22');

round2_step(-1,'%eax','%ebx','%ecx','%edx', '6','0xf61e2562', '5');

round2_step( 0,'%edx','%eax','%ebx','%ecx','11','0xc040b340', '9');

round2_step( 0,'%ecx','%edx','%eax','%ebx', '0','0x265e5a51','14');

round2_step( 0,'%ebx','%ecx','%edx','%eax', '5','0xe9b6c7aa','20');

round2_step( 0,'%eax','%ebx','%ecx','%edx','10','0xd62f105d', '5');

round2_step( 0,'%edx','%eax','%ebx','%ecx','15', '0x2441453', '9');

round2_step( 0,'%ecx','%edx','%eax','%ebx', '4','0xd8a1e681','14');

round2_step( 0,'%ebx','%ecx','%edx','%eax', '9','0xe7d3fbc8','20');

round2_step( 0,'%eax','%ebx','%ecx','%edx','14','0x21e1cde6', '5');

round2_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xc33707d6', '9');

round2_step( 0,'%ecx','%edx','%eax','%ebx', '8','0xf4d50d87','14');

round2_step( 0,'%ebx','%ecx','%edx','%eax','13','0x455a14ed','20');

round2_step( 0,'%eax','%ebx','%ecx','%edx', '2','0xa9e3e905', '5');

round2_step( 0,'%edx','%eax','%ebx','%ecx', '7','0xfcefa3f8', '9');

round2_step( 0,'%ecx','%edx','%eax','%ebx','12','0x676f02d9','14');

round2_step( 1,'%ebx','%ecx','%edx','%eax', '0','0x8d2a4c8a','20');

round3_step(-1,'%eax','%ebx','%ecx','%edx', '8','0xfffa3942', '4');

round3_step( 0,'%edx','%eax','%ebx','%ecx','11','0x8771f681','11');

round3_step( 0,'%ecx','%edx','%eax','%ebx','14','0x6d9d6122','16');

round3_step( 0,'%ebx','%ecx','%edx','%eax', '1','0xfde5380c','23');

round3_step( 0,'%eax','%ebx','%ecx','%edx', '4','0xa4beea44', '4');

round3_step( 0,'%edx','%eax','%ebx','%ecx', '7','0x4bdecfa9','11');

round3_step( 0,'%ecx','%edx','%eax','%ebx','10','0xf6bb4b60','16');

round3_step( 0,'%ebx','%ecx','%edx','%eax','13','0xbebfbc70','23');

round3_step( 0,'%eax','%ebx','%ecx','%edx', '0','0x289b7ec6', '4');

round3_step( 0,'%edx','%eax','%ebx','%ecx', '3','0xeaa127fa','11');

round3_step( 0,'%ecx','%edx','%eax','%ebx', '6','0xd4ef3085','16');

round3_step( 0,'%ebx','%ecx','%edx','%eax', '9', '0x4881d05','23');

round3_step( 0,'%eax','%ebx','%ecx','%edx','12','0xd9d4d039', '4');

round3_step( 0,'%edx','%eax','%ebx','%ecx','15','0xe6db99e5','11');

round3_step( 0,'%ecx','%edx','%eax','%ebx', '2','0x1fa27cf8','16');

round3_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xc4ac5665','23');

round4_step(-1,'%eax','%ebx','%ecx','%edx', '7','0xf4292244', '6');

round4_step( 0,'%edx','%eax','%ebx','%ecx','14','0x432aff97','10');

round4_step( 0,'%ecx','%edx','%eax','%ebx', '5','0xab9423a7','15');

round4_step( 0,'%ebx','%ecx','%edx','%eax','12','0xfc93a039','21');

round4_step( 0,'%eax','%ebx','%ecx','%edx', '3','0x655b59c3', '6');

round4_step( 0,'%edx','%eax','%ebx','%ecx','10','0x8f0ccc92','10');

round4_step( 0,'%ecx','%edx','%eax','%ebx', '1','0xffeff47d','15');

round4_step( 0,'%ebx','%ecx','%edx','%eax', '8','0x85845dd1','21');

round4_step( 0,'%eax','%ebx','%ecx','%edx','15','0x6fa87e4f', '6');

round4_step( 0,'%edx','%eax','%ebx','%ecx', '6','0xfe2ce6e0','10');

round4_step( 0,'%ecx','%edx','%eax','%ebx','13','0xa3014314','15');

round4_step( 0,'%ebx','%ecx','%edx','%eax', '4','0x4e0811a1','21');

round4_step( 0,'%eax','%ebx','%ecx','%edx','11','0xf7537e82', '6');

round4_step( 0,'%edx','%eax','%ebx','%ecx', '2','0xbd3af235','10');

round4_step( 0,'%ecx','%edx','%eax','%ebx', '9','0x2ad7d2bb','15');

round4_step( 1,'%ebx','%ecx','%edx','%eax', '0','0xeb86d391','21');

$code .= <<EOF;

/ add old values of A, B, C, D

add %r8d, %eax

add %r9d, %ebx

add %r14d, %ecx

add %r15d, %edx

/ loop control

add \$64, %rsi / ptr += 64

cmp %rdi, %rsi / cmp end with ptr

jb 2b / jmp if ptr < end

/ END of loop over 64-byte blocks

1: pop %rbp / restore ctx

mov %eax, 0*4(%rbp) / ctx->A = A

mov %ebx, 1*4(%rbp) / ctx->B = B

mov %ecx, 2*4(%rbp) / ctx->C = C

mov %edx, 3*4(%rbp) / ctx->D = D

pop %r15

pop %r14

pop %r13

pop %r12

pop %rbx

pop %rbp

ret

SET_SIZE(md5_block_asm_host_order)

/* LINTED */

/* Nothing to be linted in this file--it's pure assembly source. */

print $code;