path: root/arch/arm/crypto/aes-armv4.S

#define __ARM_ARCH__ __LINUX_ARM_ARCH__
@ ====================================================================
@ 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 ARMv4

@ January 2007.
@
@ Code uses single 1K S-box and is >2 times faster than code generated
@ by gcc-3.4.1. This is thanks to unique feature of ARMv4 ISA, which
@ allows to merge logical or arithmetic operation with shift or rotate
@ in one instruction and emit combined result every cycle. The module
@ is endian-neutral. The performance is ~42 cycles/byte for 128-bit
@ key [on single-issue Xscale PXA250 core].

@ May 2007.
@
@ AES_set_[en|de]crypt_key is added.

@ July 2010.
@
@ Rescheduling for dual-issue pipeline resulted in 12% improvement on
@ Cortex A8 core and ~25 cycles per byte processed with 128-bit key.

@ February 2011.
@
@ Profiler-assisted and platform-specific optimization resulted in 16%
@ improvement on Cortex A8 core and ~21.5 cycles per byte.

@ A little glue here to select the correct code below for the ARM CPU
@ that is being targetted.

.text
.code	32

.type	AES_Te,%object
.align	5
AES_Te:
.word	0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d
.word	0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554
.word	0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d
.word	0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a
.word	0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87
.word	0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b
.word	0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea
.word	0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b
.word	0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a
.word	0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f
.word	0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108
.word	0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f
.word	0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e
.word	0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5
.word	0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d
.word	0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f
.word	0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e
.word	0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb
.word	0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce
.word	0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497
.word	0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c
.word	0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed
.word	0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b
.word	0x944a4ade, 0x984c4cd4, 0xb05858e8,