aes-s390x.pl

#!/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/.
# ====================================================================

# AES for s390x.

# April 2007.
#
# Software performance improvement over gcc-generated code is ~70% and
# in absolute terms is ~73 cycles per byte processed with 128-bit key.
# You're likely to exclaim "why so slow?" Keep in mind that z-CPUs are
# *strictly* in-order execution and issued instruction [in this case
# load value from memory is critical] has to complete before execution
# flow proceeds. S-boxes are compressed to 2KB[+256B].
#
# As for hardware acceleration support. It's basically a "teaser," as
# it can and should be improved in several ways. Most notably support
# for CBC is not utilized, nor multiple blocks are ever processed.
# Then software key schedule can be postponed till hardware support
# detection... Performance improvement over assembler is reportedly
# ~2.5x, but can reach >8x [naturally on larger chunks] if proper
# support is implemented.

# May 2007.
#
# Implement AES_set_[en|de]crypt_key. Key schedule setup is avoided
# for 128-bit keys, if hardware support is detected.

# Januray 2009.
#
# Add support for hardware AES192/256 and reschedule instructions to
# minimize/avoid Address Generation Interlock hazard and to favour
# dual-issue z10 pipeline. This gave ~25% improvement on z10 and
# almost 50% on z9. The gain is smaller on z10, because being dual-
# issue z10 makes it improssible to eliminate the interlock condition:
# critial path is not long enough. Yet it spends ~24 cycles per byte
# processed with 128-bit key.
#
# Unlike previous version hardware support detection takes place only
# at the moment of key schedule setup, which is denoted in key->rounds.
# This is done, because deferred key setup can't be made MT-safe, not
# for key lengthes longer than 128 bits.
#
# Add AES_cbc_encrypt, which gives incredible performance improvement,
# it was measured to be ~6.6x. It's less than previously mentioned 8x,
# because software implementation was optimized.

while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
open STDOUT,">$output";

$softonly=0;	# allow hardware support

$t0="%r0";	$mask="%r0";
$t1="%r1";
$t2="%r2";	$inp="%r2";
$t3="%r3";	$out="%r3";	$bits="%r3";
$key="%r4";
$i1="%r5";
$i2="%r6";
$i3="%r7";
$s0="%r8";
$s1="%r9";
$s2="%r10";
$s3="%r11";
$tbl="%r12";
$rounds="%r13";
$ra="%r14";
$sp="%r15";

sub _data_word()
{ my $i;
    while(defined($i=shift)) { $code.=sprintf".long\t0x%08x,0x%08x\n",$i,$i; }
}

$code=<<___;
.text

.type	AES_Te,\@object
.align	256
AES_Te:
___
&_data_word(
	0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d,
	0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554,
	0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d,
	0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a,
	0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87,
	0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,
	0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea,
	0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b,
	0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a,
	0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f,
	0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108,
	0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,
	0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e,
	0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5,
	0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d,
	0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f,
	0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e,
	0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,
	0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce,
	0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497,
	0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c,
	0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed,
	0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b,
	0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,
	0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16,
	0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594,
	0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81,
	0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3,
	0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a,
	0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,
	0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163,
	0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d,
	0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f,
	0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739,
	0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47,
	0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,
	0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f,
	0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883,
	0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c,
	0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76,
	0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e,
	0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,
	0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6,
	0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b,
	0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7,
	0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0,
	0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25,
	0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,
	0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72,
	0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651,
	0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21,
	0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85,
	0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa,
	0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,
	0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0,
	0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9,
	0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133,
	0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7,
	0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920,
	0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,
	0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17,
	0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8,
	0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11,
	0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a);
$code.=<<___;
# Te4[256]
.byte	0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5
.byte	0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76
.byte	0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0
.byte	0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0
.byte	0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc
.byte	0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15
.byte	0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a
.byte	0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75
.byte	0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0
.byte	0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84
.byte	0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b
.byte	0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf
.byte	0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85
.byte	0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8
.byte	0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5
.byte	0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2
.byte	0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17
.byte	0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73
.byte	0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88
.byte	0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb
.byte	0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c
.byte	0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79
.byte	0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9
.byte	0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08
.byte	0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6
.byte	0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a
.byte	0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e
.byte	0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e
.byte	0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94
.byte	0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf
.byte	0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68
.byte	0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
# rcon[]
.long	0x01000000, 0x02000000, 0x04000000, 0x08000000
.long	0x10000000, 0x20000000, 0x40000000, 0x80000000
.long	0x1B000000, 0x36000000, 0, 0, 0, 0, 0, 0
.align	256
.size	AES_Te,.-AES_Te

# void AES_encrypt(const unsigned char *inp, unsigned char *out,
# 		 const AES_KEY *key) {
.globl	AES_encrypt
.type	AES_encrypt,\@function
AES_encrypt:
___
$code.=<<___ if (!$softonly);
	l	%r0,240($key)
	lhi	%r1,16
	clr	%r0,%r1
	jl	.Lesoft

	la	%r1,0($key)
	#la	%r2,0($inp)
	la	%r4,0($out)
	lghi	%r3,16		# single block length
	.long	0xb92e0042	# km %r4,%r2
	brc	1,.-4		# can this happen?
	br	%r14
.align	64
.Lesoft:
___
$code.=<<___;
	stmg	%r3,$ra,24($sp)

	llgf	$s0,0($inp)
	llgf	$s1,4($inp)
	llgf	$s2,8($inp)
	llgf	$s3,12($inp)

	larl	$tbl,AES_Te
	bras	$ra,_s390x_AES_encrypt

	lg	$out,24($sp)
	st	$s0,0($out)
	st	$s1,4($out)
	st	$s2,8($out)
	st	$s3,12($out)

	lmg	%r6,$ra,48($sp)
	br	$ra
.size	AES_encrypt,.-AES_encrypt

.type   _s390x_AES_encrypt,\@function
.align	16
_s390x_AES_encrypt:
	stg	$ra,152($sp)
	x	$s0,0($key)
	x	$s1,4($key)
	x	$s2,8($key)
	x	$s3,12($key)
	l	$rounds,240($key)
	llill	$mask,`0xff<<3`
	aghi	$rounds,-1
	j	.Lenc_loop
.align	16
.Lenc_loop:
	sllg	$t1,$s0,`0+3`
	srlg	$t2,$s0,`8-3`
	srlg	$t3,$s0,`16-3`
	srl	$s0,`24-3`
	nr	$s0,$mask
	ngr	$t1,$mask
	nr	$t2,$mask
	nr	$t3,$mask

	srlg	$i1,$s1,`16-3`	# i0
	sllg	$i2,$s1,`0+3`
	srlg	$i3,$s1,`8-3`
	srl	$s1,`24-3`
	nr	$i1,$mask
	nr	$s1,$mask
	ngr	$i2,$mask
	nr	$i3,$mask

	l	$s0,0($s0,$tbl)	# Te0[s0>>24]
	l	$t1,1($t1,$tbl)	# Te3[s0>>0]
	l	$t2,2($t2,$tbl) # Te2[s0>>8]
	l	$t3,3($t3,$tbl)	# Te1[s0>>16]

	x	$s0,3($i1,$tbl)	# Te1[s1>>16]
	l	$s1,0($s1,$tbl)	# Te0[s1>>24]
	x	$t2,1($i2,$tbl)	# Te3[s1>>0]
	x	$t3,2($i3,$tbl)	# Te2[s1>>8]

	srlg	$i1,$s2,`8-3`	# i0
	srlg	$i2,$s2,`16-3`	# i1
	nr	$i1,$mask
	nr	$i2,$mask
	sllg	$i3,$s2,`0+3`
	srl	$s2,`24-3`
	nr	$s2,$mask
	ngr	$i3,$mask

	xr	$s1,$t1
	srlg	$ra,$s3,`8-3`	# i1
	sllg	$t1,$s3,`0+3`	# i0
	nr	$ra,$mask
	la	$key,16($key)
	ngr	$t1,$mask

	x	$s0,2($i1,$tbl)	# Te2[s2>>8]
	x	$s1,3($i2,$tbl)	# Te1[s2>>16]
	l	$s2,0($s2,$tbl)	# Te0[s2>>24]
	x	$t3,1($i3,$tbl)	# Te3[s2>>0]

	srlg	$i3,$s3,`16-3`	# i2
	xr	$s2,$t2
	srl	$s3,`24-3`
	nr	$i3,$mask
	nr	$s3,$mask

	x	$s0,0($key)
	x	$s1,4($key)
	x	$s2,8($key)
	x	$t3,12($key)

	x	$s0,1($t1,$tbl)	# Te3[s3>>0]
	x	$s1,2($ra,$tbl)	# Te2[s3>>8]
	x	$s2,3($i3,$tbl)	# Te1[s3>>16]
	l	$s3,0($s3,$tbl)	# Te0[s3>>24]
	xr	$s3,$t3

	brct	$rounds,.Lenc_loop
	.align	16

	sllg	$t1,$s0,`0+3`
	srlg	$t2,$s0,`8-3`
	ngr	$t1,$mask
	srlg	$t3,$s0,`16-3`
	srl	$s0,`24-3`
	nr	$s0,$mask
	nr	$t2,$mask
	nr	$t3,$mask

	srlg	$i1,$s1,`16-3`	# i0
	sllg	$i2,$s1,`0+3`
	ngr	$i2,$mask
	srlg	$i3,$s1,`8-3`
	srl	$s1,`24-3`
	nr	$i1,$mask
	nr	$s1,$mask
	nr	$i3,$mask

	llgc	$s0,2($s0,$tbl)	# Te4[s0>>24]
	llgc	$t1,2($t1,$tbl)	# Te4[s0>>0]
	sll	$s0,24
	llgc	$t2,2($t2,$tbl)	# Te4[s0>>8]
	llgc	$t3,2($t3,$tbl)	# Te4[s0>>16]
	sll	$t2,8
	sll	$t3,16

	llgc	$i1,2($i1,$tbl)	# Te4[s1>>16]
	llgc	$s1,2($s1,$tbl)	# Te4[s1>>24]
	llgc	$i2,2($i2,$tbl)	# Te4[s1>>0]
	llgc	$i3,2($i3,$tbl)	# Te4[s1>>8]
	sll	$i1,16
	sll	$s1,24
	sll	$i3,8
	or	$s0,$i1
	or	$s1,$t1
	or	$t2,$i2
	or	$t3,$i3
	
	srlg	$i1,$s2,`8-3`	# i0
	srlg	$i2,$s2,`16-3`	# i1
	nr	$i1,$mask
	nr	$i2,$mask
	sllg	$i3,$s2,`0+3`
	srl	$s2,`24-3`
	ngr	$i3,$mask
	nr	$s2,$mask

	sllg	$t1,$s3,`0+3`	# i0
	srlg	$ra,$s3,`8-3`	# i1
	ngr	$t1,$mask

	llgc	$i1,2($i1,$tbl)	# Te4[s2>>8]
	llgc	$i2,2($i2,$tbl)	# Te4[s2>>16]
	sll	$i1,8
	llgc	$s2,2($s2,$tbl)	# Te4[s2>>24]
	llgc	$i3,2($i3,$tbl)	# Te4[s2>>0]
	sll	$i2,16
	nr	$ra,$mask
	sll	$s2,24
	or	$s0,$i1
	or	$s1,$i2
	or	$s2,$t2
	or	$t3,$i3

	srlg	$i3,$s3,`16-3`	# i2
	srl	$s3,`24-3`
	nr	$i3,$mask
	nr	$s3,$mask

	l	$t0,16($key)
	l	$t2,20($key)

	llgc	$i1,2($t1,$tbl)	# Te4[s3>>0]
	llgc	$i2,2($ra,$tbl)	# Te4[s3>>8]
	llgc	$i3,2($i3,$tbl)	# Te4[s3>>16]
	llgc	$s3,2($s3,$tbl)	# Te4[s3>>24]
	sll	$i2,8
	sll	$i3,16
	sll	$s3,24
	or	$s0,$i1
	or	$s1,$i2
	or	$s2,$i3
	or	$s3,$t3

	lg	$ra,152($sp)
	xr	$s0,$t0
	xr	$s1,$t2
	x	$s2,24($key)
	x	$s3,28($key)

	br	$ra	
.size	_s390x_AES_encrypt,.-_s390x_AES_encrypt
___

$code.=<<___;
.type	AES_Td,\@object
.align	256
AES_Td:
___
&_data_word(
	0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96,
	0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393,
	0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25,
	0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f,
	0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1,
	0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6,
	0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da,
	0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844,
	0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd,
	0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4,
	0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45,
	0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94,
	0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7,
	0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a,
	0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5,
	0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c,
	0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1,
	0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a,
	0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75,
	0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051,
	0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46,
	0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff,
	0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77,
	0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb,
	0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000,
	0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e,
	0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927,
	0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a,
	0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e,
	0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16,
	0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d,
	0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8,
	0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd,
	0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34,
	0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163,
	0xd731dcca, 0x42638510, 0x13972240, 0x84c61120,
	0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d,
	0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0,
	0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422,
	0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef,
	0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36,
	0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4,
	0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662,
	0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5,
	0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3,
	0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b,
	0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8,
	0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6,
	0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6,
	0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0,
	0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815,
	0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f,
	0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df,
	0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f,
	0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e,
	0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713,
	0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89,
	0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c,
	0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf,
	0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86,
	0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f,
	0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541,
	0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190,
	0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742);
$code.=<<___;
# Td4[256]
.byte	0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38
.byte	0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
.byte	0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87
.byte	0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
.byte	0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d
.byte	0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
.byte	0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2
.byte	0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
.byte	0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16
.byte	0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
.byte	0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda
.byte	0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
.byte	0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a
.byte	0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
.byte	0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02
.byte	0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
.byte	0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea
.byte	0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
.byte	0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85
.byte	0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
.byte	0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89
.byte	0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
.byte	0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20
.byte	0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
.byte	0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31
.byte	0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
.byte	0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d
.byte	0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
.byte	0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0
.byte	0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
.byte	0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26
.byte	0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
.size	AES_Td,.-AES_Td

# void AES_decrypt(const unsigned char *inp, unsigned char *out,
# 		 const AES_KEY *key) {
.globl	AES_decrypt
.type	AES_decrypt,\@function
AES_decrypt:
___
$code.=<<___ if (!$softonly);
	l	%r0,240($key)
	lhi	%r1,16
	clr	%r0,%r1
	jl	.Ldsoft

	la	%r1,0($key)
	#la	%r2,0($inp)
	la	%r4,0($out)
	lghi	%r3,16		# single block length
	.long	0xb92e0042	# km %r4,%r2
	brc	1,.-4		# can this happen?
	br	%r14
.align	64
.Ldsoft:
___
$code.=<<___;
	stmg	%r3,$ra,24($sp)

	llgf	$s0,0($inp)
	llgf	$s1,4($inp)
	llgf	$s2,8($inp)
	llgf	$s3,12($inp)

	larl	$tbl,AES_Td
	bras	$ra,_s390x_AES_decrypt

	lg	$out,24($sp)
	st	$s0,0($out)
	st	$s1,4($out)
	st	$s2,8($out)
	st	$s3,12($out)

	lmg	%r6,$ra,48($sp)
	br	$ra
.size	AES_decrypt,.-AES_decrypt

.type   _s390x_AES_decrypt,\@function
.align	16
_s390x_AES_decrypt:
	stg	$ra,152($sp)
	x	$s0,0($key)
	x	$s1,4($key)
	x	$s2,8($key)
	x	$s3,12($key)
	l	$rounds,240($key)
	llill	$mask,`0xff<<3`
	aghi	$rounds,-1
	j	.Ldec_loop
.align	16
.Ldec_loop:
	srlg	$t1,$s0,`16-3`
	srlg	$t2,$s0,`8-3`
	sllg	$t3,$s0,`0+3`
	srl	$s0,`24-3`
	nr	$s0,$mask
	nr	$t1,$mask
	nr	$t2,$mask
	ngr	$t3,$mask

	sllg	$i1,$s1,`0+3`	# i0
	srlg	$i2,$s1,`16-3`
	srlg	$i3,$s1,`8-3`
	srl	$s1,`24-3`
	ngr	$i1,$mask
	nr	$s1,$mask
	nr	$i2,$mask
	nr	$i3,$mask

	l	$s0,0($s0,$tbl)	# Td0[s0>>24]
	l	$t1,3($t1,$tbl)	# Td1[s0>>16]
	l	$t2,2($t2,$tbl)	# Td2[s0>>8]
	l	$t3,1($t3,$tbl)	# Td3[s0>>0]

	x	$s0,1($i1,$tbl)	# Td3[s1>>0]
	l	$s1,0($s1,$tbl)	# Td0[s1>>24]
	x	$t2,3($i2,$tbl)	# Td1[s1>>16]
	x	$t3,2($i3,$tbl)	# Td2[s1>>8]

	srlg	$i1,$s2,`8-3`	# i0
	sllg	$i2,$s2,`0+3`	# i1
	srlg	$i3,$s2,`16-3`
	srl	$s2,`24-3`
	nr	$i1,$mask
	ngr	$i2,$mask
	nr	$s2,$mask
	nr	$i3,$mask

	xr	$s1,$t1
	srlg	$ra,$s3,`8-3`	# i1
	srlg	$t1,$s3,`16-3`	# i0
	nr	$ra,$mask
	la	$key,16($key)
	nr	$t1,$mask

	x	$s0,2($i1,$tbl)	# Td2[s2>>8]
	x	$s1,1($i2,$tbl)	# Td3[s2>>0]
	l	$s2,0($s2,$tbl)	# Td0[s2>>24]
	x	$t3,3($i3,$tbl)	# Td1[s2>>16]

	sllg	$i3,$s3,`0+3`	# i2
	srl	$s3,`24-3`
	ngr	$i3,$mask
	nr	$s3,$mask

	xr	$s2,$t2
	x	$s0,0($key)
	x	$s1,4($key)
	x	$s2,8($key)
	x	$t3,12($key)

	x	$s0,3($t1,$tbl)	# Td1[s3>>16]
	x	$s1,2($ra,$tbl)	# Td2[s3>>8]
	x	$s2,1($i3,$tbl)	# Td3[s3>>0]
	l	$s3,0($s3,$tbl)	# Td0[s3>>24]
	xr	$s3,$t3

	brct	$rounds,.Ldec_loop
	.align	16

	l	$t1,`2048+0`($tbl)	# prefetch Td4
	l	$t2,`2048+64`($tbl)
	l	$t3,`2048+128`($tbl)
	l	$i1,`2048+192`($tbl)
	llill	$mask,0xff

	srlg	$i3,$s0,24	# i0
	srlg	$t1,$s0,16
	srlg	$t2,$s0,8
	nr	$s0,$mask	# i3
	nr	$t1,$mask

	srlg	$i1,$s1,24
	nr	$t2,$mask
	srlg	$i2,$s1,16
	srlg	$ra,$s1,8
	nr	$s1,$mask	# i0
	nr	$i2,$mask
	nr	$ra,$mask

	llgc	$i3,2048($i3,$tbl)	# Td4[s0>>24]
	llgc	$t1,2048($t1,$tbl)	# Td4[s0>>16]
	llgc	$t2,2048($t2,$tbl)	# Td4[s0>>8]
	sll	$t1,16
	llgc	$t3,2048($s0,$tbl)	# Td4[s0>>0]
	sllg	$s0,$i3,24
	sll	$t2,8

	llgc	$s1,2048($s1,$tbl)	# Td4[s1>>0]
	llgc	$i1,2048($i1,$tbl)	# Td4[s1>>24]
	llgc	$i2,2048($i2,$tbl)	# Td4[s1>>16]
	sll	$i1,24
	llgc	$i3,2048($ra,$tbl)	# Td4[s1>>8]
	sll	$i2,16
	sll	$i3,8
	or	$s0,$s1
	or	$t1,$i1
	or	$t2,$i2
	or	$t3,$i3

	srlg	$i1,$s2,8	# i0
	srlg	$i2,$s2,24
	srlg	$i3,$s2,16
	nr	$s2,$mask	# i1
	nr	$i1,$mask
	nr	$i3,$mask
	llgc	$i1,2048($i1,$tbl)	# Td4[s2>>8]
	llgc	$s1,2048($s2,$tbl)	# Td4[s2>>0]
	llgc	$i2,2048($i2,$tbl)	# Td4[s2>>24]
	llgc	$i3,2048($i3,$tbl)	# Td4[s2>>16]
	sll	$i1,8
	sll	$i2,24
	or	$s0,$i1
	sll	$i3,16
	or	$t2,$i2
	or	$t3,$i3

	srlg	$i1,$s3,16	# i0
	srlg	$i2,$s3,8	# i1
	srlg	$i3,$s3,24
	nr	$s3,$mask	# i2
	nr	$i1,$mask
	nr	$i2,$mask

	lg	$ra,152($sp)
	or	$s1,$t1
	l	$t0,16($key)
	l	$t1,20($key)

	llgc	$i1,2048($i1,$tbl)	# Td4[s3>>16]
	llgc	$i2,2048($i2,$tbl)	# Td4[s3>>8]
	sll	$i1,16
	llgc	$s2,2048($s3,$tbl)	# Td4[s3>>0]
	llgc	$s3,2048($i3,$tbl)	# Td4[s3>>24]
	sll	$i2,8
	sll	$s3,24
	or	$s0,$i1
	or	$s1,$i2
	or	$s2,$t2
	or	$s3,$t3

	xr	$s0,$t0
	xr	$s1,$t1
	x	$s2,24($key)
	x	$s3,28($key)

	br	$ra	
.size	_s390x_AES_decrypt,.-_s390x_AES_decrypt
___

$code.=<<___;
# void AES_set_encrypt_key(const unsigned char *in, int bits,
# 		 AES_KEY *key) {
.globl	AES_set_encrypt_key
.type	AES_set_encrypt_key,\@function
.align	16
AES_set_encrypt_key:
	lghi	$t0,0
	clgr	$inp,$t0
	je	.Lminus1
	clgr	$key,$t0
	je	.Lminus1

	lghi	$t0,128
	clr	$bits,$t0
	je	.Lproceed
	lghi	$t0,192
	clr	$bits,$t0
	je	.Lproceed
	lghi	$t0,256
	clr	$bits,$t0
	je	.Lproceed
	lghi	%r2,-2
	br	%r14

.align	16
.Lproceed:
___
$code.=<<___ if (!$softonly);
	# convert bits to km code, [128,192,256]->[18,19,20]
	lhi	%r5,-128
	lhi	%r0,18
	ar	%r5,$bits
	srl	%r5,6
	ar	%r5,%r0

	larl	%r1,OPENSSL_s390xcap_P
	lg	%r0,0(%r1)
	tmhl	%r0,0x4000	# check for message-security assist
	jz	.Lekey_internal

	lghi	%r0,0		# query capability vector
	la	%r1,16($sp)
	.long	0xb92f0042	# kmc %r4,%r2

	llihh	%r1,0x8000
	srlg	%r1,%r1,0(%r5)
	ng	%r1,16($sp)
	jz	.Lekey_internal

	lmg	%r0,%r1,0($inp)	# just copy 128 bits...
	stmg	%r0,%r1,0($key)
	lhi	%r0,192
	cr	$bits,%r0
	jl	1f
	lg	%r1,16($inp)
	stg	%r1,16($key)
	je	1f
	lg	%r1,24($inp)
	stg	%r1,24($key)
1:	st	$bits,236($key)	# save bits
	st	%r5,240($key)	# save km code
	lghi	%r2,0
	br	%r14
___
$code.=<<___;
.align	16
.Lekey_internal:
	stmg	%r6,%r13,48($sp)	# all non-volatile regs

	larl	$tbl,AES_Te+2048

	llgf	$s0,0($inp)
	llgf	$s1,4($inp)
	llgf	$s2,8($inp)
	llgf	$s3,12($inp)
	st	$s0,0($key)
	st	$s1,4($key)
	st	$s2,8($key)
	st	$s3,12($key)
	lghi	$t0,128
	cr	$bits,$t0
	jne	.Lnot128

	llill	$mask,0xff
	lghi	$t3,0			# i=0
	lghi	$rounds,10
	st	$rounds,240($key)

	llgfr	$t2,$s3			# temp=rk[3]
	srlg	$i1,$s3,8
	srlg	$i2,$s3,16
	srlg	$i3,$s3,24
	nr	$t2,$mask
	nr	$i1,$mask
	nr	$i2,$mask

.align	16
.L128_loop:
	la	$t2,0($t2,$tbl)
	la	$i1,0($i1,$tbl)
	la	$i2,0($i2,$tbl)
	la	$i3,0($i3,$tbl)
	icm	$t2,2,0($t2)		# Te4[rk[3]>>0]<<8
	icm	$t2,4,0($i1)		# Te4[rk[3]>>8]<<16
	icm	$t2,8,0($i2)		# Te4[rk[3]>>16]<<24
	icm	$t2,1,0($i3)		# Te4[rk[3]>>24]
	x	$t2,256($t3,$tbl)	# rcon[i]
	xr	$s0,$t2			# rk[4]=rk[0]^...
	xr	$s1,$s0			# rk[5]=rk[1]^rk[4]
	xr	$s2,$s1			# rk[6]=rk[2]^rk[5]
	xr	$s3,$s2			# rk[7]=rk[3]^rk[6]

	llgfr	$t2,$s3			# temp=rk[3]
	srlg	$i1,$s3,8
	srlg	$i2,$s3,16
	nr	$t2,$mask
	nr	$i1,$mask
	srlg	$i3,$s3,24
	nr	$i2,$mask

	st	$s0,16($key)
	st	$s1,20($key)
	st	$s2,24($key)
	st	$s3,28($key)
	la	$key,16($key)		# key+=4
	la	$t3,4($t3)		# i++
	brct	$rounds,.L128_loop
	lghi	%r2,0
	lmg	%r6,%r13,48($sp)
	br	$ra

.align	16
.Lnot128:
	llgf	$t0,16($inp)
	llgf	$t1,20($inp)
	st	$t0,16($key)
	st	$t1,20($key)
	lghi	$t0,192
	cr	$bits,$t0
	jne	.Lnot192

	llill	$mask,0xff
	lghi	$t3,0			# i=0
	lghi	$rounds,12
	st	$rounds,240($key)
	lghi	$rounds,8

	srlg	$i1,$t1,8
	srlg	$i2,$t1,16
	srlg	$i3,$t1,24
	nr	$t1,$mask
	nr	$i1,$mask
	nr	$i2,$mask

.align	16
.L192_loop:
	la	$t1,0($t1,$tbl)
	la	$i1,0($i1,$tbl)
	la	$i2,0($i2,$tbl)
	la	$i3,0($i3,$tbl)
	icm	$t1,2,0($t1)		# Te4[rk[5]>>0]<<8
	icm	$t1,4,0($i1)		# Te4[rk[5]>>8]<<16
	icm	$t1,8,0($i2)		# Te4[rk[5]>>16]<<24
	icm	$t1,1,0($i3)		# Te4[rk[5]>>24]
	x	$t1,256($t3,$tbl)	# rcon[i]
	xr	$s0,$t1			# rk[6]=rk[0]^...
	xr	$s1,$s0			# rk[7]=rk[1]^rk[6]
	xr	$s2,$s1			# rk[8]=rk[2]^rk[7]
	xr	$s3,$s2			# rk[9]=rk[3]^rk[8]

	st	$s0,24($key)
	st	$s1,28($key)
	st	$s2,32($key)
	st	$s3,36($key)
	brct	$rounds,.L192_continue
	lghi	%r2,0
	lmg	%r6,%r13,48($sp)
	br	$ra

.align	16
.L192_continue:
	lgr	$t1,$s3
	x	$t1,16($key)		# rk[10]=rk[4]^rk[9]
	st	$t1,40($key)
	x	$t1,20($key)		# rk[11]=rk[5]^rk[10]
	st	$t1,44($key)

	srlg	$i1,$t1,8
	srlg	$i2,$t1,16
	srlg	$i3,$t1,24
	nr	$t1,$mask
	nr	$i1,$mask
	nr	$i2,$mask

	la	$key,24($key)		# key+=6
	la	$t3,4($t3)		# i++
	j	.L192_loop

.align	16
.Lnot192:
	llgf	$t0,24($inp)
	llgf	$t1,28($inp)
	st	$t0,24($key)
	st	$t1,28($key)
	llill	$mask,0xff
	lghi	$t3,0			# i=0
	lghi	$rounds,14
	st	$rounds,240($key)
	lghi	$rounds,7

	srlg	$i1,$t1,8
	srlg	$i2,$t1,16
	srlg	$i3,$t1,24
	nr	$t1,$mask
	nr	$i1,$mask
	nr	$i2,$mask

.align	16
.L256_loop:
	la	$t1,0($t1,$tbl)
	la	$i1,0($i1,$tbl)
	la	$i2,0($i2,$tbl)
	la	$i3,0($i3,$tbl)
	icm	$t1,2,0($t1)		# Te4[rk[7]>>0]<<8
	icm	$t1,4,0($i1)		# Te4[rk[7]>>8]<<16
	icm	$t1,8,0($i2)		# Te4[rk[7]>>16]<<24
	icm	$t1,1,0($i3)		# Te4[rk[7]>>24]
	x	$t1,256($t3,$tbl)	# rcon[i]
	xr	$s0,$t1			# rk[8]=rk[0]^...
	xr	$s1,$s0			# rk[9]=rk[1]^rk[8]
	xr	$s2,$s1			# rk[10]=rk[2]^rk[9]
	xr	$s3,$s2			# rk[11]=rk[3]^rk[10]
	st	$s0,32($key)
	st	$s1,36($key)
	st	$s2,40($key)
	st	$s3,44($key)
	brct	$rounds,.L256_continue
	lghi	%r2,0
	lmg	%r6,%r13,48($sp)
	br	$ra

.align	16
.L256_continue:
	lgr	$t1,$s3			# temp=rk[11]
	srlg	$i1,$s3,8
	srlg	$i2,$s3,16
	srlg	$i3,$s3,24
	nr	$t1,$mask
	nr	$i1,$mask
	nr	$i2,$mask
	la	$t1,0($t1,$tbl)
	la	$i1,0($i1,$tbl)
	la	$i2,0($i2,$tbl)
	la	$i3,0($i3,$tbl)
	llgc	$t1,0($t1)		# Te4[rk[11]>>0]
	icm	$t1,2,0($i1)		# Te4[rk[11]>>8]<<8
	icm	$t1,4,0($i2)		# Te4[rk[11]>>16]<<16
	icm	$t1,8,0($i3)		# Te4[rk[11]>>24]<<24
	x	$t1,16($key)		# rk[12]=rk[4]^...
	st	$t1,48($key)
	x	$t1,20($key)		# rk[13]=rk[5]^rk[12]
	st	$t1,52($key)
	x	$t1,24($key)		# rk[14]=rk[6]^rk[13]
	st	$t1,56($key)
	x	$t1,28($key)		# rk[15]=rk[7]^rk[14]
	st	$t1,60($key)

	srlg	$i1,$t1,8
	srlg	$i2,$t1,16
	srlg	$i3,$t1,24
	nr	$t1,$mask
	nr	$i1,$mask
	nr	$i2,$mask

	la	$key,32($key)		# key+=8
	la	$t3,4($t3)		# i++
	j	.L256_loop

.Lminus1:
	lghi	%r2,-1
	br	$ra
.size	AES_set_encrypt_key,.-AES_set_encrypt_key

# void AES_set_decrypt_key(const unsigned char *in, int bits,
# 		 AES_KEY *key) {
.globl	AES_set_decrypt_key
.type	AES_set_decrypt_key,\@function
.align	16
AES_set_decrypt_key:
	stg	$key,32($sp)		# I rely on AES_set_encrypt_key to
	stg	$ra,112($sp)		# save non-volatile registers!
	bras	$ra,AES_set_encrypt_key
	lg	$key,32($sp)
	lg	$ra,112($sp)
	ltgr	%r2,%r2
	bnzr	$ra
___
$code.=<<___ if (!$softonly);
	l	$t0,240($key)
	lhi	$t1,16
	cr	$t0,$t1
	jl	.Lgo
	oill	$t0,0x80	# set "decrypt" bit
	st	$t0,240($key)
	br	$ra

.align	16
.Ldkey_internal:
	stg	$key,32($sp)
	stg	$ra,40($sp)
	bras	$ra,.Lekey_internal
	lg	$key,32($sp)
	lg	$ra,40($sp)
___
$code.=<<___;

.Lgo:	llgf	$rounds,240($key)
	la	$i1,0($key)
	sllg	$i2,$rounds,4
	la	$i2,0($i2,$key)
	srl	$rounds,1
	lghi	$t1,-16

.align	16
.Linv:	lmg	$s0,$s1,0($i1)
	lmg	$s2,$s3,0($i2)
	stmg	$s0,$s1,0($i2)
	stmg	$s2,$s3,0($i1)
	la	$i1,16($i1)
	la	$i2,0($t1,$i2)
	brct	$rounds,.Linv
___
$mask80=$i1;
$mask1b=$i2;
$maskfe=$i3;
$code.=<<___;
	llgf	$rounds,240($key)
	aghi	$rounds,-1
	sll	$rounds,2	# (rounds-1)*4
	llilh	$mask80,0x8080
	llilh	$mask1b,0x1b1b
	llilh	$maskfe,0xfefe
	oill	$mask80,0x8080
	oill	$mask1b,0x1b1b
	oill	$maskfe,0xfefe

.align	16
.Lmix:	l	$s0,16($key)	# tp1
	lr	$s1,$s0
	ngr	$s1,$mask80
	srlg	$t1,$s1,7
	slr	$s1,$t1
	nr	$s1,$mask1b
	sllg	$t1,$s0,1
	nr	$t1,$maskfe
	xr	$s1,$t1		# tp2

	lr	$s2,$s1
	ngr	$s2,$mask80
	srlg	$t1,$s2,7
	slr	$s2,$t1
	nr	$s2,$mask1b
	sllg	$t1,$s1,1
	nr	$t1,$maskfe
	xr	$s2,$t1		# tp4

	lr	$s3,$s2
	ngr	$s3,$mask80
	srlg	$t1,$s3,7
	slr	$s3,$t1
	nr	$s3,$mask1b
	sllg	$t1,$s2,1
	nr	$t1,$maskfe
	xr	$s3,$t1		# tp8

	xr	$s1,$s0		# tp2^tp1
	xr	$s2,$s0		# tp4^tp1
	rll	$s0,$s0,24	# = ROTATE(tp1,8)
	xr	$s2,$s3		# ^=tp8
	xr	$s0,$s1		# ^=tp2^tp1
	xr	$s1,$s3		# tp2^tp1^tp8
	xr	$s0,$s2		# ^=tp4^tp1^tp8
	rll	$s1,$s1,8
	rll	$s2,$s2,16
	xr	$s0,$s1		# ^= ROTATE(tp8^tp2^tp1,24)
	rll	$s3,$s3,24
	xr	$s0,$s2    	# ^= ROTATE(tp8^tp4^tp1,16)
	xr	$s0,$s3		# ^= ROTATE(tp8,8)

	st	$s0,16($key)
	la	$key,4($key)
	brct	$rounds,.Lmix

	lmg	%r6,%r13,48($sp)# as was saved by AES_set_encrypt_key!
	lghi	%r2,0
	br	$ra
.size	AES_set_decrypt_key,.-AES_set_decrypt_key
___

#void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
#                     size_t length, const AES_KEY *key,
#                     unsigned char *ivec, const int enc)
{
my $inp="%r2";
my $out="%r4";	# length and out are swapped
my $len="%r3";
my $key="%r5";
my $ivp="%r6";

$code.=<<___;
.globl	AES_cbc_encrypt
.type	AES_cbc_encrypt,\@function
.align	16
AES_cbc_encrypt:
	xgr	%r3,%r4		# flip %r3 and %r4, out and len
	xgr	%r4,%r3
	xgr	%r3,%r4
___
$code.=<<___ if (!$softonly);
	lhi	%r0,16
	cl	%r0,240($key)
	jh	.Lcbc_software

	lg	%r0,0($ivp)	# copy ivec
	lg	%r1,8($ivp)
	stmg	%r0,%r1,16($sp)
	lmg	%r0,%r1,0($key)	# copy key, cover 256 bit
	stmg	%r0,%r1,32($sp)
	lmg	%r0,%r1,16($key)
	stmg	%r0,%r1,48($sp)
	l	%r0,240($key)	# load kmc code
	lghi	$key,15		# res=len%16, len-=res;
	ngr	$key,$len
	slgr	$len,$key
	la	%r1,16($sp)	# parameter block - ivec || key
	jz	.Lkmc_truncated
	.long	0xb92f0042	# kmc %r4,%r2
	brc	1,.-4		# pay attention to "partial completion"
	ltr	$key,$key
	jnz	.Lkmc_truncated
.Lkmc_done:
	lmg	%r0,%r1,16($sp)	# copy ivec to caller
	stg	%r0,0($ivp)
	stg	%r1,8($ivp)
	br	$ra
.align	16
.Lkmc_truncated:
	ahi	$key,-1		# it's the way it's encoded in mvc
	tmll	%r0,0x80
	jnz	.Lkmc_truncated_dec
	lghi	%r1,0
	stg	%r1,128($sp)
	stg	%r1,136($sp)
	bras	%r1,1f
	mvc	128(1,$sp),0($inp)
1:	ex	$key,0(%r1)
	la	%r1,16($sp)	# restore parameter block
	la	$inp,128($sp)
	lghi	$len,16
	.long	0xb92f0042	# kmc %r4,%r2
	j	.Lkmc_done
.align	16
.Lkmc_truncated_dec:
	stg	$out,64($sp)
	la	$out,128($sp)
	lghi	$len,16
	.long	0xb92f0042	# kmc %r4,%r2
	lg	$out,64($sp)
	bras	%r1,2f
	mvc	0(1,$out),128($sp)
2:	ex	$key,0(%r1)
	j	.Lkmc_done
.align	16
.Lcbc_software:
___
$code.=<<___;
	stmg	$key,$ra,40($sp)
	lhi	%r0,0
	cl	%r0,164($sp)
	je	.Lcbc_decrypt

	larl	$tbl,AES_Te

	llgf	$s0,0($ivp)
	llgf	$s1,4($ivp)
	llgf	$s2,8($ivp)
	llgf	$s3,12($ivp)

	lghi	$t0,16
	slgr	$len,$t0
	brc	4,.Lcbc_enc_tail	# if borrow
.Lcbc_enc_loop:
	stmg	$inp,$out,16($sp)
	x	$s0,0($inp)
	x	$s1,4($inp)
	x	$s2,8($inp)
	x	$s3,12($inp)
	lgr	%r4,$key

	bras	$ra,_s390x_AES_encrypt

	lmg	$inp,$key,16($sp)
	st	$s0,0($out)
	st	$s1,4($out)
	st	$s2,8($out)
	st	$s3,12($out)

	la	$inp,16($inp)
	la	$out,16($out)
	lghi	$t0,16
	ltgr	$len,$len
	jz	.Lcbc_enc_done
	slgr	$len,$t0
	brc	4,.Lcbc_enc_tail	# if borrow
	j	.Lcbc_enc_loop
.align	16
.Lcbc_enc_done:
	lg	$ivp,48($sp)
	st	$s0,0($ivp)
	st	$s1,4($ivp)	
	st	$s2,8($ivp)
	st	$s3,12($ivp)

	lmg	%r7,$ra,56($sp)
	br	$ra

.align	16
.Lcbc_enc_tail:
	aghi	$len,15
	lghi	$t0,0
	stg	$t0,128($sp)
	stg	$t0,136($sp)
	bras	$t1,3f
	mvc	128(1,$sp),0($inp)
3:	ex	$len,0($t1)
	lghi	$len,0
	la	$inp,128($sp)
	j	.Lcbc_enc_loop

.align	16
.Lcbc_decrypt:
	larl	$tbl,AES_Td

	lg	$t0,0($ivp)
	lg	$t1,8($ivp)
	stmg	$t0,$t1,128($sp)

.Lcbc_dec_loop:
	stmg	$inp,$out,16($sp)
	llgf	$s0,0($inp)
	llgf	$s1,4($inp)
	llgf	$s2,8($inp)
	llgf	$s3,12($inp)
	lgr	%r4,$key

	bras	$ra,_s390x_AES_decrypt

	lmg	$inp,$key,16($sp)
	sllg	$s0,$s0,32
	sllg	$s2,$s2,32
	lr	$s0,$s1
	lr	$s2,$s3

	lg	$t0,0($inp)
	lg	$t1,8($inp)
	xg	$s0,128($sp)
	xg	$s2,136($sp)
	lghi	$s1,16
	slgr	$len,$s1
	brc	4,.Lcbc_dec_tail	# if borrow
	brc	2,.Lcbc_dec_done	# if zero
	stg	$s0,0($out)
	stg	$s2,8($out)
	stmg	$t0,$t1,128($sp)

	la	$inp,16($inp)
	la	$out,16($out)
	j	.Lcbc_dec_loop

.Lcbc_dec_done:
	stg	$s0,0($out)
	stg	$s2,8($out)
.Lcbc_dec_exit:
	lmg	$ivp,$ra,48($sp)
	stmg	$t0,$t1,0($ivp)

	br	$ra

.align	16
.Lcbc_dec_tail:
	aghi	$len,15
	stg	$s0,128($sp)
	stg	$s2,136($sp)
	bras	$s1,4f
	mvc	0(1,$out),128($sp)
4:	ex	$len,0($s1)
	j	.Lcbc_dec_exit
.size	AES_cbc_encrypt,.-AES_cbc_encrypt
.comm  OPENSSL_s390xcap_P,8,8
___
}
$code.=<<___;
.string	"AES for s390x, CRYPTOGAMS by <appro\@openssl.org>"
___

$code =~ s/\`([^\`]*)\`/eval $1/gem;
print $code;
close STDOUT;	# force flush