# AES for ARMv4
# January 2007.
-
-# Code uses single 1K S-box and >2 times faster than code compiled
-# with gcc-3.4.1. This is thanks to unique feature of ARMv4 ISA, which
+#
+# 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.
+# 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.
+
+while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
+open STDOUT,">$output";
$s0="r0";
$s1="r1";
$rounds="r12";
$code=<<___;
+#include "arm_arch.h"
.text
.code 32
.word 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8
.word 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11
.word 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a
+@ 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[]
+.word 0x01000000, 0x02000000, 0x04000000, 0x08000000
+.word 0x10000000, 0x20000000, 0x40000000, 0x80000000
+.word 0x1B000000, 0x36000000, 0, 0, 0, 0, 0, 0
.size AES_Te,.-AES_Te
@ void AES_encrypt(const unsigned char *in, unsigned char *out,
stmdb sp!,{r1,r4-r12,lr}
mov $rounds,r0 @ inp
mov $key,r2
- sub $tbl,r3,#1024 @ Te
+ sub $tbl,r3,#AES_encrypt-AES_Te @ Te
+#if __ARM_ARCH__<7
ldrb $s0,[$rounds,#3] @ load input data in endian-neutral
ldrb $t1,[$rounds,#2] @ manner...
ldrb $t2,[$rounds,#1]
ldrb $t3,[$rounds,#0]
orr $s0,$s0,$t1,lsl#8
- orr $s0,$s0,$t2,lsl#16
- orr $s0,$s0,$t3,lsl#24
ldrb $s1,[$rounds,#7]
+ orr $s0,$s0,$t2,lsl#16
ldrb $t1,[$rounds,#6]
+ orr $s0,$s0,$t3,lsl#24
ldrb $t2,[$rounds,#5]
ldrb $t3,[$rounds,#4]
orr $s1,$s1,$t1,lsl#8
- orr $s1,$s1,$t2,lsl#16
- orr $s1,$s1,$t3,lsl#24
ldrb $s2,[$rounds,#11]
+ orr $s1,$s1,$t2,lsl#16
ldrb $t1,[$rounds,#10]
+ orr $s1,$s1,$t3,lsl#24
ldrb $t2,[$rounds,#9]
ldrb $t3,[$rounds,#8]
orr $s2,$s2,$t1,lsl#8
- orr $s2,$s2,$t2,lsl#16
- orr $s2,$s2,$t3,lsl#24
ldrb $s3,[$rounds,#15]
+ orr $s2,$s2,$t2,lsl#16
ldrb $t1,[$rounds,#14]
+ orr $s2,$s2,$t3,lsl#24
ldrb $t2,[$rounds,#13]
ldrb $t3,[$rounds,#12]
orr $s3,$s3,$t1,lsl#8
orr $s3,$s3,$t2,lsl#16
orr $s3,$s3,$t3,lsl#24
-
+#else
+ ldr $s0,[$rounds,#0]
+ ldr $s1,[$rounds,#4]
+ ldr $s2,[$rounds,#8]
+ ldr $s3,[$rounds,#12]
+#ifdef __ARMEL__
+ rev $s0,$s0
+ rev $s1,$s1
+ rev $s2,$s2
+ rev $s3,$s3
+#endif
+#endif
bl _armv4_AES_encrypt
ldr $rounds,[sp],#4 @ pop out
+#if __ARM_ARCH__>=7
+#ifdef __ARMEL__
+ rev $s0,$s0
+ rev $s1,$s1
+ rev $s2,$s2
+ rev $s3,$s3
+#endif
+ str $s0,[$rounds,#0]
+ str $s1,[$rounds,#4]
+ str $s2,[$rounds,#8]
+ str $s3,[$rounds,#12]
+#else
mov $t1,$s0,lsr#24 @ write output in endian-neutral
mov $t2,$s0,lsr#16 @ manner...
mov $t3,$s0,lsr#8
strb $t1,[$rounds,#0]
strb $t2,[$rounds,#1]
- strb $t3,[$rounds,#2]
- strb $s0,[$rounds,#3]
mov $t1,$s1,lsr#24
+ strb $t3,[$rounds,#2]
mov $t2,$s1,lsr#16
+ strb $s0,[$rounds,#3]
mov $t3,$s1,lsr#8
strb $t1,[$rounds,#4]
strb $t2,[$rounds,#5]
- strb $t3,[$rounds,#6]
- strb $s1,[$rounds,#7]
mov $t1,$s2,lsr#24
+ strb $t3,[$rounds,#6]
mov $t2,$s2,lsr#16
+ strb $s1,[$rounds,#7]
mov $t3,$s2,lsr#8
strb $t1,[$rounds,#8]
strb $t2,[$rounds,#9]
- strb $t3,[$rounds,#10]
- strb $s2,[$rounds,#11]
mov $t1,$s3,lsr#24
+ strb $t3,[$rounds,#10]
mov $t2,$s3,lsr#16
+ strb $s2,[$rounds,#11]
mov $t3,$s3,lsr#8
strb $t1,[$rounds,#12]
strb $t2,[$rounds,#13]
strb $t3,[$rounds,#14]
strb $s3,[$rounds,#15]
-
+#endif
+#if __ARM_ARCH__>=5
+ ldmia sp!,{r4-r12,pc}
+#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
bx lr @ interoperable with Thumb ISA:-)
+#endif
.size AES_encrypt,.-AES_encrypt
.type _armv4_AES_encrypt,%function
.align 2
_armv4_AES_encrypt:
str lr,[sp,#-4]! @ push lr
- ldr $t1,[$key],#16
- ldr $t2,[$key,#-12]
- ldr $t3,[$key,#-8]
- ldr $i1,[$key,#-4]
- ldr $rounds,[$key,#240-16]
+ ldmia $key!,{$t1-$i1}
eor $s0,$s0,$t1
+ ldr $rounds,[$key,#240-16]
eor $s1,$s1,$t2
eor $s2,$s2,$t3
eor $s3,$s3,$i1
sub $rounds,$rounds,#1
mov lr,#255
-.Lenc_loop:
+ and $i1,lr,$s0
and $i2,lr,$s0,lsr#8
and $i3,lr,$s0,lsr#16
- and $i1,lr,$s0
mov $s0,$s0,lsr#24
+.Lenc_loop:
ldr $t1,[$tbl,$i1,lsl#2] @ Te3[s0>>0]
- ldr $s0,[$tbl,$s0,lsl#2] @ Te0[s0>>24]
- ldr $t2,[$tbl,$i2,lsl#2] @ Te2[s0>>8]
- ldr $t3,[$tbl,$i3,lsl#2] @ Te1[s0>>16]
-
and $i1,lr,$s1,lsr#16 @ i0
+ ldr $t2,[$tbl,$i2,lsl#2] @ Te2[s0>>8]
and $i2,lr,$s1
+ ldr $t3,[$tbl,$i3,lsl#2] @ Te1[s0>>16]
and $i3,lr,$s1,lsr#8
+ ldr $s0,[$tbl,$s0,lsl#2] @ Te0[s0>>24]
mov $s1,$s1,lsr#24
+
ldr $i1,[$tbl,$i1,lsl#2] @ Te1[s1>>16]
- ldr $s1,[$tbl,$s1,lsl#2] @ Te0[s1>>24]
ldr $i2,[$tbl,$i2,lsl#2] @ Te3[s1>>0]
ldr $i3,[$tbl,$i3,lsl#2] @ Te2[s1>>8]
eor $s0,$s0,$i1,ror#8
- eor $s1,$s1,$t1,ror#24
- eor $t2,$t2,$i2,ror#8
- eor $t3,$t3,$i3,ror#8
-
+ ldr $s1,[$tbl,$s1,lsl#2] @ Te0[s1>>24]
and $i1,lr,$s2,lsr#8 @ i0
+ eor $t2,$t2,$i2,ror#8
and $i2,lr,$s2,lsr#16 @ i1
+ eor $t3,$t3,$i3,ror#8
and $i3,lr,$s2
- mov $s2,$s2,lsr#24
ldr $i1,[$tbl,$i1,lsl#2] @ Te2[s2>>8]
+ eor $s1,$s1,$t1,ror#24
ldr $i2,[$tbl,$i2,lsl#2] @ Te1[s2>>16]
- ldr $s2,[$tbl,$s2,lsl#2] @ Te0[s2>>24]
+ mov $s2,$s2,lsr#24
+
ldr $i3,[$tbl,$i3,lsl#2] @ Te3[s2>>0]
eor $s0,$s0,$i1,ror#16
- eor $s1,$s1,$i2,ror#8
- eor $s2,$s2,$t2,ror#16
- eor $t3,$t3,$i3,ror#16
-
+ ldr $s2,[$tbl,$s2,lsl#2] @ Te0[s2>>24]
and $i1,lr,$s3 @ i0
+ eor $s1,$s1,$i2,ror#8
and $i2,lr,$s3,lsr#8 @ i1
+ eor $t3,$t3,$i3,ror#16
and $i3,lr,$s3,lsr#16 @ i2
- mov $s3,$s3,lsr#24
ldr $i1,[$tbl,$i1,lsl#2] @ Te3[s3>>0]
+ eor $s2,$s2,$t2,ror#16
ldr $i2,[$tbl,$i2,lsl#2] @ Te2[s3>>8]
+ mov $s3,$s3,lsr#24
+
ldr $i3,[$tbl,$i3,lsl#2] @ Te1[s3>>16]
- ldr $s3,[$tbl,$s3,lsl#2] @ Te0[s3>>24]
eor $s0,$s0,$i1,ror#24
+ ldr $i1,[$key],#16
eor $s1,$s1,$i2,ror#16
+ ldr $s3,[$tbl,$s3,lsl#2] @ Te0[s3>>24]
eor $s2,$s2,$i3,ror#8
+ ldr $t1,[$key,#-12]
eor $s3,$s3,$t3,ror#8
- ldr $t1,[$key],#16
- ldr $t2,[$key,#-12]
- ldr $t3,[$key,#-8]
- ldr $i1,[$key,#-4]
- eor $s0,$s0,$t1
- eor $s1,$s1,$t2
- eor $s2,$s2,$t3
- eor $s3,$s3,$i1
+ ldr $t2,[$key,#-8]
+ eor $s0,$s0,$i1
+ ldr $t3,[$key,#-4]
+ and $i1,lr,$s0
+ eor $s1,$s1,$t1
+ and $i2,lr,$s0,lsr#8
+ eor $s2,$s2,$t2
+ and $i3,lr,$s0,lsr#16
+ eor $s3,$s3,$t3
+ mov $s0,$s0,lsr#24
subs $rounds,$rounds,#1
bne .Lenc_loop
add $tbl,$tbl,#2
- and $i1,lr,$s0
- and $i2,lr,$s0,lsr#8
- and $i3,lr,$s0,lsr#16
- mov $s0,$s0,lsr#24
ldrb $t1,[$tbl,$i1,lsl#2] @ Te4[s0>>0]
- ldrb $s0,[$tbl,$s0,lsl#2] @ Te4[s0>>24]
- ldrb $t2,[$tbl,$i2,lsl#2] @ Te4[s0>>8]
- ldrb $t3,[$tbl,$i3,lsl#2] @ Te4[s0>>16]
-
and $i1,lr,$s1,lsr#16 @ i0
+ ldrb $t2,[$tbl,$i2,lsl#2] @ Te4[s0>>8]
and $i2,lr,$s1
+ ldrb $t3,[$tbl,$i3,lsl#2] @ Te4[s0>>16]
and $i3,lr,$s1,lsr#8
+ ldrb $s0,[$tbl,$s0,lsl#2] @ Te4[s0>>24]
mov $s1,$s1,lsr#24
+
ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s1>>16]
- ldrb $s1,[$tbl,$s1,lsl#2] @ Te4[s1>>24]
ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s1>>0]
ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s1>>8]
eor $s0,$i1,$s0,lsl#8
- eor $s1,$t1,$s1,lsl#24
- eor $t2,$i2,$t2,lsl#8
- eor $t3,$i3,$t3,lsl#8
-
+ ldrb $s1,[$tbl,$s1,lsl#2] @ Te4[s1>>24]
and $i1,lr,$s2,lsr#8 @ i0
+ eor $t2,$i2,$t2,lsl#8
and $i2,lr,$s2,lsr#16 @ i1
+ eor $t3,$i3,$t3,lsl#8
and $i3,lr,$s2
- mov $s2,$s2,lsr#24
ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s2>>8]
+ eor $s1,$t1,$s1,lsl#24
ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s2>>16]
- ldrb $s2,[$tbl,$s2,lsl#2] @ Te4[s2>>24]
+ mov $s2,$s2,lsr#24
+
ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s2>>0]
eor $s0,$i1,$s0,lsl#8
- eor $s1,$s1,$i2,lsl#16
- eor $s2,$t2,$s2,lsl#24
- eor $t3,$i3,$t3,lsl#8
-
+ ldrb $s2,[$tbl,$s2,lsl#2] @ Te4[s2>>24]
and $i1,lr,$s3 @ i0
+ eor $s1,$s1,$i2,lsl#16
and $i2,lr,$s3,lsr#8 @ i1
+ eor $t3,$i3,$t3,lsl#8
and $i3,lr,$s3,lsr#16 @ i2
- mov $s3,$s3,lsr#24
ldrb $i1,[$tbl,$i1,lsl#2] @ Te4[s3>>0]
+ eor $s2,$t2,$s2,lsl#24
ldrb $i2,[$tbl,$i2,lsl#2] @ Te4[s3>>8]
+ mov $s3,$s3,lsr#24
+
ldrb $i3,[$tbl,$i3,lsl#2] @ Te4[s3>>16]
- ldrb $s3,[$tbl,$s3,lsl#2] @ Te4[s3>>24]
eor $s0,$i1,$s0,lsl#8
+ ldr $i1,[$key,#0]
+ ldrb $s3,[$tbl,$s3,lsl#2] @ Te4[s3>>24]
eor $s1,$s1,$i2,lsl#8
+ ldr $t1,[$key,#4]
eor $s2,$s2,$i3,lsl#16
+ ldr $t2,[$key,#8]
eor $s3,$t3,$s3,lsl#24
+ ldr $t3,[$key,#12]
- ldr lr,[sp],#4 @ pop lr
- ldr $t1,[$key,#0]
- ldr $t2,[$key,#4]
- ldr $t3,[$key,#8]
- ldr $i1,[$key,#12]
- eor $s0,$s0,$t1
- eor $s1,$s1,$t2
- eor $s2,$s2,$t3
- eor $s3,$s3,$i1
+ eor $s0,$s0,$i1
+ eor $s1,$s1,$t1
+ eor $s2,$s2,$t2
+ eor $s3,$s3,$t3
sub $tbl,$tbl,#2
- mov pc,lr @ return
+ ldr pc,[sp],#4 @ pop and return
.size _armv4_AES_encrypt,.-_armv4_AES_encrypt
+.global AES_set_encrypt_key
+.type AES_set_encrypt_key,%function
+.align 5
+AES_set_encrypt_key:
+ sub r3,pc,#8 @ AES_set_encrypt_key
+ teq r0,#0
+ moveq r0,#-1
+ beq .Labrt
+ teq r2,#0
+ moveq r0,#-1
+ beq .Labrt
+
+ teq r1,#128
+ beq .Lok
+ teq r1,#192
+ beq .Lok
+ teq r1,#256
+ movne r0,#-1
+ bne .Labrt
+
+.Lok: stmdb sp!,{r4-r12,lr}
+ sub $tbl,r3,#AES_set_encrypt_key-AES_Te-1024 @ Te4
+
+ mov $rounds,r0 @ inp
+ mov lr,r1 @ bits
+ mov $key,r2 @ key
+
+#if __ARM_ARCH__<7
+ ldrb $s0,[$rounds,#3] @ load input data in endian-neutral
+ ldrb $t1,[$rounds,#2] @ manner...
+ ldrb $t2,[$rounds,#1]
+ ldrb $t3,[$rounds,#0]
+ orr $s0,$s0,$t1,lsl#8
+ ldrb $s1,[$rounds,#7]
+ orr $s0,$s0,$t2,lsl#16
+ ldrb $t1,[$rounds,#6]
+ orr $s0,$s0,$t3,lsl#24
+ ldrb $t2,[$rounds,#5]
+ ldrb $t3,[$rounds,#4]
+ orr $s1,$s1,$t1,lsl#8
+ ldrb $s2,[$rounds,#11]
+ orr $s1,$s1,$t2,lsl#16
+ ldrb $t1,[$rounds,#10]
+ orr $s1,$s1,$t3,lsl#24
+ ldrb $t2,[$rounds,#9]
+ ldrb $t3,[$rounds,#8]
+ orr $s2,$s2,$t1,lsl#8
+ ldrb $s3,[$rounds,#15]
+ orr $s2,$s2,$t2,lsl#16
+ ldrb $t1,[$rounds,#14]
+ orr $s2,$s2,$t3,lsl#24
+ ldrb $t2,[$rounds,#13]
+ ldrb $t3,[$rounds,#12]
+ orr $s3,$s3,$t1,lsl#8
+ str $s0,[$key],#16
+ orr $s3,$s3,$t2,lsl#16
+ str $s1,[$key,#-12]
+ orr $s3,$s3,$t3,lsl#24
+ str $s2,[$key,#-8]
+ str $s3,[$key,#-4]
+#else
+ ldr $s0,[$rounds,#0]
+ ldr $s1,[$rounds,#4]
+ ldr $s2,[$rounds,#8]
+ ldr $s3,[$rounds,#12]
+#ifdef __ARMEL__
+ rev $s0,$s0
+ rev $s1,$s1
+ rev $s2,$s2
+ rev $s3,$s3
+#endif
+ str $s0,[$key],#16
+ str $s1,[$key,#-12]
+ str $s2,[$key,#-8]
+ str $s3,[$key,#-4]
+#endif
+
+ teq lr,#128
+ bne .Lnot128
+ mov $rounds,#10
+ str $rounds,[$key,#240-16]
+ add $t3,$tbl,#256 @ rcon
+ mov lr,#255
+
+.L128_loop:
+ and $t2,lr,$s3,lsr#24
+ and $i1,lr,$s3,lsr#16
+ ldrb $t2,[$tbl,$t2]
+ and $i2,lr,$s3,lsr#8
+ ldrb $i1,[$tbl,$i1]
+ and $i3,lr,$s3
+ ldrb $i2,[$tbl,$i2]
+ orr $t2,$t2,$i1,lsl#24
+ ldrb $i3,[$tbl,$i3]
+ orr $t2,$t2,$i2,lsl#16
+ ldr $t1,[$t3],#4 @ rcon[i++]
+ orr $t2,$t2,$i3,lsl#8
+ eor $t2,$t2,$t1
+ eor $s0,$s0,$t2 @ rk[4]=rk[0]^...
+ eor $s1,$s1,$s0 @ rk[5]=rk[1]^rk[4]
+ str $s0,[$key],#16
+ eor $s2,$s2,$s1 @ rk[6]=rk[2]^rk[5]
+ str $s1,[$key,#-12]
+ eor $s3,$s3,$s2 @ rk[7]=rk[3]^rk[6]
+ str $s2,[$key,#-8]
+ subs $rounds,$rounds,#1
+ str $s3,[$key,#-4]
+ bne .L128_loop
+ sub r2,$key,#176
+ b .Ldone
+
+.Lnot128:
+#if __ARM_ARCH__<7
+ ldrb $i2,[$rounds,#19]
+ ldrb $t1,[$rounds,#18]
+ ldrb $t2,[$rounds,#17]
+ ldrb $t3,[$rounds,#16]
+ orr $i2,$i2,$t1,lsl#8
+ ldrb $i3,[$rounds,#23]
+ orr $i2,$i2,$t2,lsl#16
+ ldrb $t1,[$rounds,#22]
+ orr $i2,$i2,$t3,lsl#24
+ ldrb $t2,[$rounds,#21]
+ ldrb $t3,[$rounds,#20]
+ orr $i3,$i3,$t1,lsl#8
+ orr $i3,$i3,$t2,lsl#16
+ str $i2,[$key],#8
+ orr $i3,$i3,$t3,lsl#24
+ str $i3,[$key,#-4]
+#else
+ ldr $i2,[$rounds,#16]
+ ldr $i3,[$rounds,#20]
+#ifdef __ARMEL__
+ rev $i2,$i2
+ rev $i3,$i3
+#endif
+ str $i2,[$key],#8
+ str $i3,[$key,#-4]
+#endif
+
+ teq lr,#192
+ bne .Lnot192
+ mov $rounds,#12
+ str $rounds,[$key,#240-24]
+ add $t3,$tbl,#256 @ rcon
+ mov lr,#255
+ mov $rounds,#8
+
+.L192_loop:
+ and $t2,lr,$i3,lsr#24
+ and $i1,lr,$i3,lsr#16
+ ldrb $t2,[$tbl,$t2]
+ and $i2,lr,$i3,lsr#8
+ ldrb $i1,[$tbl,$i1]
+ and $i3,lr,$i3
+ ldrb $i2,[$tbl,$i2]
+ orr $t2,$t2,$i1,lsl#24
+ ldrb $i3,[$tbl,$i3]
+ orr $t2,$t2,$i2,lsl#16
+ ldr $t1,[$t3],#4 @ rcon[i++]
+ orr $t2,$t2,$i3,lsl#8
+ eor $i3,$t2,$t1
+ eor $s0,$s0,$i3 @ rk[6]=rk[0]^...
+ eor $s1,$s1,$s0 @ rk[7]=rk[1]^rk[6]
+ str $s0,[$key],#24
+ eor $s2,$s2,$s1 @ rk[8]=rk[2]^rk[7]
+ str $s1,[$key,#-20]
+ eor $s3,$s3,$s2 @ rk[9]=rk[3]^rk[8]
+ str $s2,[$key,#-16]
+ subs $rounds,$rounds,#1
+ str $s3,[$key,#-12]
+ subeq r2,$key,#216
+ beq .Ldone
+
+ ldr $i1,[$key,#-32]
+ ldr $i2,[$key,#-28]
+ eor $i1,$i1,$s3 @ rk[10]=rk[4]^rk[9]
+ eor $i3,$i2,$i1 @ rk[11]=rk[5]^rk[10]
+ str $i1,[$key,#-8]
+ str $i3,[$key,#-4]
+ b .L192_loop
+
+.Lnot192:
+#if __ARM_ARCH__<7
+ ldrb $i2,[$rounds,#27]
+ ldrb $t1,[$rounds,#26]
+ ldrb $t2,[$rounds,#25]
+ ldrb $t3,[$rounds,#24]
+ orr $i2,$i2,$t1,lsl#8
+ ldrb $i3,[$rounds,#31]
+ orr $i2,$i2,$t2,lsl#16
+ ldrb $t1,[$rounds,#30]
+ orr $i2,$i2,$t3,lsl#24
+ ldrb $t2,[$rounds,#29]
+ ldrb $t3,[$rounds,#28]
+ orr $i3,$i3,$t1,lsl#8
+ orr $i3,$i3,$t2,lsl#16
+ str $i2,[$key],#8
+ orr $i3,$i3,$t3,lsl#24
+ str $i3,[$key,#-4]
+#else
+ ldr $i2,[$rounds,#24]
+ ldr $i3,[$rounds,#28]
+#ifdef __ARMEL__
+ rev $i2,$i2
+ rev $i3,$i3
+#endif
+ str $i2,[$key],#8
+ str $i3,[$key,#-4]
+#endif
+
+ mov $rounds,#14
+ str $rounds,[$key,#240-32]
+ add $t3,$tbl,#256 @ rcon
+ mov lr,#255
+ mov $rounds,#7
+
+.L256_loop:
+ and $t2,lr,$i3,lsr#24
+ and $i1,lr,$i3,lsr#16
+ ldrb $t2,[$tbl,$t2]
+ and $i2,lr,$i3,lsr#8
+ ldrb $i1,[$tbl,$i1]
+ and $i3,lr,$i3
+ ldrb $i2,[$tbl,$i2]
+ orr $t2,$t2,$i1,lsl#24
+ ldrb $i3,[$tbl,$i3]
+ orr $t2,$t2,$i2,lsl#16
+ ldr $t1,[$t3],#4 @ rcon[i++]
+ orr $t2,$t2,$i3,lsl#8
+ eor $i3,$t2,$t1
+ eor $s0,$s0,$i3 @ rk[8]=rk[0]^...
+ eor $s1,$s1,$s0 @ rk[9]=rk[1]^rk[8]
+ str $s0,[$key],#32
+ eor $s2,$s2,$s1 @ rk[10]=rk[2]^rk[9]
+ str $s1,[$key,#-28]
+ eor $s3,$s3,$s2 @ rk[11]=rk[3]^rk[10]
+ str $s2,[$key,#-24]
+ subs $rounds,$rounds,#1
+ str $s3,[$key,#-20]
+ subeq r2,$key,#256
+ beq .Ldone
+
+ and $t2,lr,$s3
+ and $i1,lr,$s3,lsr#8
+ ldrb $t2,[$tbl,$t2]
+ and $i2,lr,$s3,lsr#16
+ ldrb $i1,[$tbl,$i1]
+ and $i3,lr,$s3,lsr#24
+ ldrb $i2,[$tbl,$i2]
+ orr $t2,$t2,$i1,lsl#8
+ ldrb $i3,[$tbl,$i3]
+ orr $t2,$t2,$i2,lsl#16
+ ldr $t1,[$key,#-48]
+ orr $t2,$t2,$i3,lsl#24
+
+ ldr $i1,[$key,#-44]
+ ldr $i2,[$key,#-40]
+ eor $t1,$t1,$t2 @ rk[12]=rk[4]^...
+ ldr $i3,[$key,#-36]
+ eor $i1,$i1,$t1 @ rk[13]=rk[5]^rk[12]
+ str $t1,[$key,#-16]
+ eor $i2,$i2,$i1 @ rk[14]=rk[6]^rk[13]
+ str $i1,[$key,#-12]
+ eor $i3,$i3,$i2 @ rk[15]=rk[7]^rk[14]
+ str $i2,[$key,#-8]
+ str $i3,[$key,#-4]
+ b .L256_loop
+
+.Ldone: mov r0,#0
+ ldmia sp!,{r4-r12,lr}
+.Labrt: tst lr,#1
+ moveq pc,lr @ be binary compatible with V4, yet
+ bx lr @ interoperable with Thumb ISA:-)
+.size AES_set_encrypt_key,.-AES_set_encrypt_key
+
+.global AES_set_decrypt_key
+.type AES_set_decrypt_key,%function
+.align 5
+AES_set_decrypt_key:
+ str lr,[sp,#-4]! @ push lr
+ bl AES_set_encrypt_key
+ teq r0,#0
+ ldrne lr,[sp],#4 @ pop lr
+ bne .Labrt
+
+ stmdb sp!,{r4-r12}
+
+ ldr $rounds,[r2,#240] @ AES_set_encrypt_key preserves r2,
+ mov $key,r2 @ which is AES_KEY *key
+ mov $i1,r2
+ add $i2,r2,$rounds,lsl#4
+
+.Linv: ldr $s0,[$i1]
+ ldr $s1,[$i1,#4]
+ ldr $s2,[$i1,#8]
+ ldr $s3,[$i1,#12]
+ ldr $t1,[$i2]
+ ldr $t2,[$i2,#4]
+ ldr $t3,[$i2,#8]
+ ldr $i3,[$i2,#12]
+ str $s0,[$i2],#-16
+ str $s1,[$i2,#16+4]
+ str $s2,[$i2,#16+8]
+ str $s3,[$i2,#16+12]
+ str $t1,[$i1],#16
+ str $t2,[$i1,#-12]
+ str $t3,[$i1,#-8]
+ str $i3,[$i1,#-4]
+ teq $i1,$i2
+ bne .Linv
+___
+$mask80=$i1;
+$mask1b=$i2;
+$mask7f=$i3;
+$code.=<<___;
+ ldr $s0,[$key,#16]! @ prefetch tp1
+ mov $mask80,#0x80
+ mov $mask1b,#0x1b
+ orr $mask80,$mask80,#0x8000
+ orr $mask1b,$mask1b,#0x1b00
+ orr $mask80,$mask80,$mask80,lsl#16
+ orr $mask1b,$mask1b,$mask1b,lsl#16
+ sub $rounds,$rounds,#1
+ mvn $mask7f,$mask80
+ mov $rounds,$rounds,lsl#2 @ (rounds-1)*4
+
+.Lmix: and $t1,$s0,$mask80
+ and $s1,$s0,$mask7f
+ sub $t1,$t1,$t1,lsr#7
+ and $t1,$t1,$mask1b
+ eor $s1,$t1,$s1,lsl#1 @ tp2
+
+ and $t1,$s1,$mask80
+ and $s2,$s1,$mask7f
+ sub $t1,$t1,$t1,lsr#7
+ and $t1,$t1,$mask1b
+ eor $s2,$t1,$s2,lsl#1 @ tp4
+
+ and $t1,$s2,$mask80
+ and $s3,$s2,$mask7f
+ sub $t1,$t1,$t1,lsr#7
+ and $t1,$t1,$mask1b
+ eor $s3,$t1,$s3,lsl#1 @ tp8
+
+ eor $t1,$s1,$s2
+ eor $t2,$s0,$s3 @ tp9
+ eor $t1,$t1,$s3 @ tpe
+ eor $t1,$t1,$s1,ror#24
+ eor $t1,$t1,$t2,ror#24 @ ^= ROTATE(tpb=tp9^tp2,8)
+ eor $t1,$t1,$s2,ror#16
+ eor $t1,$t1,$t2,ror#16 @ ^= ROTATE(tpd=tp9^tp4,16)
+ eor $t1,$t1,$t2,ror#8 @ ^= ROTATE(tp9,24)
+
+ ldr $s0,[$key,#4] @ prefetch tp1
+ str $t1,[$key],#4
+ subs $rounds,$rounds,#1
+ bne .Lmix
+
+ mov r0,#0
+#if __ARM_ARCH__>=5
+ ldmia sp!,{r4-r12,pc}
+#else
+ ldmia sp!,{r4-r12,lr}
+ tst lr,#1
+ moveq pc,lr @ be binary compatible with V4, yet
+ bx lr @ interoperable with Thumb ISA:-)
+#endif
+.size AES_set_decrypt_key,.-AES_set_decrypt_key
+
.type AES_Td,%object
.align 5
AES_Td:
.word 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541
.word 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190
.word 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742
-
+@ 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
stmdb sp!,{r1,r4-r12,lr}
mov $rounds,r0 @ inp
mov $key,r2
- sub $tbl,r3,#1280 @ Td
+ sub $tbl,r3,#AES_decrypt-AES_Td @ Td
+#if __ARM_ARCH__<7
ldrb $s0,[$rounds,#3] @ load input data in endian-neutral
ldrb $t1,[$rounds,#2] @ manner...
ldrb $t2,[$rounds,#1]
ldrb $t3,[$rounds,#0]
orr $s0,$s0,$t1,lsl#8
- orr $s0,$s0,$t2,lsl#16
- orr $s0,$s0,$t3,lsl#24
ldrb $s1,[$rounds,#7]
+ orr $s0,$s0,$t2,lsl#16
ldrb $t1,[$rounds,#6]
+ orr $s0,$s0,$t3,lsl#24
ldrb $t2,[$rounds,#5]
ldrb $t3,[$rounds,#4]
orr $s1,$s1,$t1,lsl#8
- orr $s1,$s1,$t2,lsl#16
- orr $s1,$s1,$t3,lsl#24
ldrb $s2,[$rounds,#11]
+ orr $s1,$s1,$t2,lsl#16
ldrb $t1,[$rounds,#10]
+ orr $s1,$s1,$t3,lsl#24
ldrb $t2,[$rounds,#9]
ldrb $t3,[$rounds,#8]
orr $s2,$s2,$t1,lsl#8
- orr $s2,$s2,$t2,lsl#16
- orr $s2,$s2,$t3,lsl#24
ldrb $s3,[$rounds,#15]
+ orr $s2,$s2,$t2,lsl#16
ldrb $t1,[$rounds,#14]
+ orr $s2,$s2,$t3,lsl#24
ldrb $t2,[$rounds,#13]
ldrb $t3,[$rounds,#12]
orr $s3,$s3,$t1,lsl#8
orr $s3,$s3,$t2,lsl#16
orr $s3,$s3,$t3,lsl#24
-
+#else
+ ldr $s0,[$rounds,#0]
+ ldr $s1,[$rounds,#4]
+ ldr $s2,[$rounds,#8]
+ ldr $s3,[$rounds,#12]
+#ifdef __ARMEL__
+ rev $s0,$s0
+ rev $s1,$s1
+ rev $s2,$s2
+ rev $s3,$s3
+#endif
+#endif
bl _armv4_AES_decrypt
ldr $rounds,[sp],#4 @ pop out
+#if __ARM_ARCH__>=7
+#ifdef __ARMEL__
+ rev $s0,$s0
+ rev $s1,$s1
+ rev $s2,$s2
+ rev $s3,$s3
+#endif
+ str $s0,[$rounds,#0]
+ str $s1,[$rounds,#4]
+ str $s2,[$rounds,#8]
+ str $s3,[$rounds,#12]
+#else
mov $t1,$s0,lsr#24 @ write output in endian-neutral
mov $t2,$s0,lsr#16 @ manner...
mov $t3,$s0,lsr#8
strb $t1,[$rounds,#0]
strb $t2,[$rounds,#1]
- strb $t3,[$rounds,#2]
- strb $s0,[$rounds,#3]
mov $t1,$s1,lsr#24
+ strb $t3,[$rounds,#2]
mov $t2,$s1,lsr#16
+ strb $s0,[$rounds,#3]
mov $t3,$s1,lsr#8
strb $t1,[$rounds,#4]
strb $t2,[$rounds,#5]
- strb $t3,[$rounds,#6]
- strb $s1,[$rounds,#7]
mov $t1,$s2,lsr#24
+ strb $t3,[$rounds,#6]
mov $t2,$s2,lsr#16
+ strb $s1,[$rounds,#7]
mov $t3,$s2,lsr#8
strb $t1,[$rounds,#8]
strb $t2,[$rounds,#9]
- strb $t3,[$rounds,#10]
- strb $s2,[$rounds,#11]
mov $t1,$s3,lsr#24
+ strb $t3,[$rounds,#10]
mov $t2,$s3,lsr#16
+ strb $s2,[$rounds,#11]
mov $t3,$s3,lsr#8
strb $t1,[$rounds,#12]
strb $t2,[$rounds,#13]
strb $t3,[$rounds,#14]
strb $s3,[$rounds,#15]
-
+#endif
+#if __ARM_ARCH__>=5
+ ldmia sp!,{r4-r12,pc}
+#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
bx lr @ interoperable with Thumb ISA:-)
+#endif
.size AES_decrypt,.-AES_decrypt
.type _armv4_AES_decrypt,%function
.align 2
_armv4_AES_decrypt:
str lr,[sp,#-4]! @ push lr
- ldr $t1,[$key],#16
- ldr $t2,[$key,#-12]
- ldr $t3,[$key,#-8]
- ldr $i1,[$key,#-4]
- ldr $rounds,[$key,#240-16]
+ ldmia $key!,{$t1-$i1}
eor $s0,$s0,$t1
+ ldr $rounds,[$key,#240-16]
eor $s1,$s1,$t2
eor $s2,$s2,$t3
eor $s3,$s3,$i1
sub $rounds,$rounds,#1
mov lr,#255
-.Ldec_loop:
and $i1,lr,$s0,lsr#16
and $i2,lr,$s0,lsr#8
and $i3,lr,$s0
mov $s0,$s0,lsr#24
+.Ldec_loop:
ldr $t1,[$tbl,$i1,lsl#2] @ Td1[s0>>16]
- ldr $s0,[$tbl,$s0,lsl#2] @ Td0[s0>>24]
- ldr $t2,[$tbl,$i2,lsl#2] @ Td2[s0>>8]
- ldr $t3,[$tbl,$i3,lsl#2] @ Td3[s0>>0]
-
and $i1,lr,$s1 @ i0
+ ldr $t2,[$tbl,$i2,lsl#2] @ Td2[s0>>8]
and $i2,lr,$s1,lsr#16
+ ldr $t3,[$tbl,$i3,lsl#2] @ Td3[s0>>0]
and $i3,lr,$s1,lsr#8
+ ldr $s0,[$tbl,$s0,lsl#2] @ Td0[s0>>24]
mov $s1,$s1,lsr#24
+
ldr $i1,[$tbl,$i1,lsl#2] @ Td3[s1>>0]
- ldr $s1,[$tbl,$s1,lsl#2] @ Td0[s1>>24]
ldr $i2,[$tbl,$i2,lsl#2] @ Td1[s1>>16]
ldr $i3,[$tbl,$i3,lsl#2] @ Td2[s1>>8]
eor $s0,$s0,$i1,ror#24
- eor $s1,$s1,$t1,ror#8
- eor $t2,$i2,$t2,ror#8
- eor $t3,$i3,$t3,ror#8
-
+ ldr $s1,[$tbl,$s1,lsl#2] @ Td0[s1>>24]
and $i1,lr,$s2,lsr#8 @ i0
+ eor $t2,$i2,$t2,ror#8
and $i2,lr,$s2 @ i1
+ eor $t3,$i3,$t3,ror#8
and $i3,lr,$s2,lsr#16
- mov $s2,$s2,lsr#24
ldr $i1,[$tbl,$i1,lsl#2] @ Td2[s2>>8]
+ eor $s1,$s1,$t1,ror#8
ldr $i2,[$tbl,$i2,lsl#2] @ Td3[s2>>0]
- ldr $s2,[$tbl,$s2,lsl#2] @ Td0[s2>>24]
+ mov $s2,$s2,lsr#24
+
ldr $i3,[$tbl,$i3,lsl#2] @ Td1[s2>>16]
eor $s0,$s0,$i1,ror#16
- eor $s1,$s1,$i2,ror#24
- eor $s2,$s2,$t2,ror#8
- eor $t3,$i3,$t3,ror#8
-
+ ldr $s2,[$tbl,$s2,lsl#2] @ Td0[s2>>24]
and $i1,lr,$s3,lsr#16 @ i0
+ eor $s1,$s1,$i2,ror#24
and $i2,lr,$s3,lsr#8 @ i1
+ eor $t3,$i3,$t3,ror#8
and $i3,lr,$s3 @ i2
- mov $s3,$s3,lsr#24
ldr $i1,[$tbl,$i1,lsl#2] @ Td1[s3>>16]
+ eor $s2,$s2,$t2,ror#8
ldr $i2,[$tbl,$i2,lsl#2] @ Td2[s3>>8]
+ mov $s3,$s3,lsr#24
+
ldr $i3,[$tbl,$i3,lsl#2] @ Td3[s3>>0]
- ldr $s3,[$tbl,$s3,lsl#2] @ Td0[s3>>24]
eor $s0,$s0,$i1,ror#8
+ ldr $i1,[$key],#16
eor $s1,$s1,$i2,ror#16
+ ldr $s3,[$tbl,$s3,lsl#2] @ Td0[s3>>24]
eor $s2,$s2,$i3,ror#24
- eor $s3,$s3,$t3,ror#8
- ldr $t1,[$key],#16
- ldr $t2,[$key,#-12]
- ldr $t3,[$key,#-8]
- ldr $i1,[$key,#-4]
- eor $s0,$s0,$t1
- eor $s1,$s1,$t2
- eor $s2,$s2,$t3
- eor $s3,$s3,$i1
+ ldr $t1,[$key,#-12]
+ eor $s0,$s0,$i1
+ ldr $t2,[$key,#-8]
+ eor $s3,$s3,$t3,ror#8
+ ldr $t3,[$key,#-4]
+ and $i1,lr,$s0,lsr#16
+ eor $s1,$s1,$t1
+ and $i2,lr,$s0,lsr#8
+ eor $s2,$s2,$t2
+ and $i3,lr,$s0
+ eor $s3,$s3,$t3
+ mov $s0,$s0,lsr#24
subs $rounds,$rounds,#1
bne .Ldec_loop
add $tbl,$tbl,#1024
- ldr $t1,[$tbl,#0] @ prefetch Td4
- ldr $t2,[$tbl,#32]
- ldr $t3,[$tbl,#64]
- ldr $i1,[$tbl,#96]
- ldr $i2,[$tbl,#128]
- ldr $i3,[$tbl,#160]
- ldr $t1,[$tbl,#192]
- ldr $t2,[$tbl,#224]
+ ldr $t2,[$tbl,#0] @ prefetch Td4
+ ldr $t3,[$tbl,#32]
+ ldr $t1,[$tbl,#64]
+ ldr $t2,[$tbl,#96]
+ ldr $t3,[$tbl,#128]
+ ldr $t1,[$tbl,#160]
+ ldr $t2,[$tbl,#192]
+ ldr $t3,[$tbl,#224]
- and $i1,lr,$s0,lsr#16
- and $i2,lr,$s0,lsr#8
- and $i3,lr,$s0
- ldrb $s0,[$tbl,$s0,lsr#24] @ Td4[s0>>24]
+ ldrb $s0,[$tbl,$s0] @ Td4[s0>>24]
ldrb $t1,[$tbl,$i1] @ Td4[s0>>16]
- ldrb $t2,[$tbl,$i2] @ Td4[s0>>8]
- ldrb $t3,[$tbl,$i3] @ Td4[s0>>0]
-
and $i1,lr,$s1 @ i0
+ ldrb $t2,[$tbl,$i2] @ Td4[s0>>8]
and $i2,lr,$s1,lsr#16
+ ldrb $t3,[$tbl,$i3] @ Td4[s0>>0]
and $i3,lr,$s1,lsr#8
+
ldrb $i1,[$tbl,$i1] @ Td4[s1>>0]
ldrb $s1,[$tbl,$s1,lsr#24] @ Td4[s1>>24]
ldrb $i2,[$tbl,$i2] @ Td4[s1>>16]
- ldrb $i3,[$tbl,$i3] @ Td4[s1>>8]
eor $s0,$i1,$s0,lsl#24
+ ldrb $i3,[$tbl,$i3] @ Td4[s1>>8]
eor $s1,$t1,$s1,lsl#8
- eor $t2,$t2,$i2,lsl#8
- eor $t3,$t3,$i3,lsl#8
-
and $i1,lr,$s2,lsr#8 @ i0
+ eor $t2,$t2,$i2,lsl#8
and $i2,lr,$s2 @ i1
- and $i3,lr,$s2,lsr#16
ldrb $i1,[$tbl,$i1] @ Td4[s2>>8]
+ eor $t3,$t3,$i3,lsl#8
ldrb $i2,[$tbl,$i2] @ Td4[s2>>0]
+ and $i3,lr,$s2,lsr#16
+
ldrb $s2,[$tbl,$s2,lsr#24] @ Td4[s2>>24]
- ldrb $i3,[$tbl,$i3] @ Td4[s2>>16]
eor $s0,$s0,$i1,lsl#8
+ ldrb $i3,[$tbl,$i3] @ Td4[s2>>16]
eor $s1,$i2,$s1,lsl#16
- eor $s2,$t2,$s2,lsl#16
- eor $t3,$t3,$i3,lsl#16
-
and $i1,lr,$s3,lsr#16 @ i0
+ eor $s2,$t2,$s2,lsl#16
and $i2,lr,$s3,lsr#8 @ i1
- and $i3,lr,$s3 @ i2
ldrb $i1,[$tbl,$i1] @ Td4[s3>>16]
+ eor $t3,$t3,$i3,lsl#16
ldrb $i2,[$tbl,$i2] @ Td4[s3>>8]
+ and $i3,lr,$s3 @ i2
+
ldrb $i3,[$tbl,$i3] @ Td4[s3>>0]
ldrb $s3,[$tbl,$s3,lsr#24] @ Td4[s3>>24]
eor $s0,$s0,$i1,lsl#16
+ ldr $i1,[$key,#0]
eor $s1,$s1,$i2,lsl#8
+ ldr $t1,[$key,#4]
eor $s2,$i3,$s2,lsl#8
+ ldr $t2,[$key,#8]
eor $s3,$t3,$s3,lsl#24
+ ldr $t3,[$key,#12]
- ldr lr,[sp],#4 @ pop lr
- ldr $t1,[$key,#0]
- ldr $t2,[$key,#4]
- ldr $t3,[$key,#8]
- ldr $i1,[$key,#12]
- eor $s0,$s0,$t1
- eor $s1,$s1,$t2
- eor $s2,$s2,$t3
- eor $s3,$s3,$i1
+ eor $s0,$s0,$i1
+ eor $s1,$s1,$t1
+ eor $s2,$s2,$t2
+ eor $s3,$s3,$t3
sub $tbl,$tbl,#1024
- mov pc,lr @ return
+ ldr pc,[sp],#4 @ pop and return
.size _armv4_AES_decrypt,.-_armv4_AES_decrypt
.asciz "AES for ARMv4, CRYPTOGAMS by <appro\@openssl.org>"
+.align 2
___
+$code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile with -march=armv4
print $code;
+close STDOUT; # enforce flush
projects / openssl.git / blobdiff