grpc1.45.2/third_party/boringssl-with-bazel/ios-arm/crypto/fipsmodule/vpaes-armv7.S

// This file is generated from a similarly-named Perl script in the BoringSSL
// source tree. Do not edit by hand.

#if !defined(__has_feature)
#define __has_feature(x) 0
#endif
#if __has_feature(memory_sanitizer) && !defined(OPENSSL_NO_ASM)
#define OPENSSL_NO_ASM
#endif

#if !defined(OPENSSL_NO_ASM)
#if defined(BORINGSSL_PREFIX)
#include <boringssl_prefix_symbols_asm.h>
#endif
.syntax	unified




#if defined(__thumb2__)
.thumb
#else
.code	32
#endif

.text


.align	7	@ totally strategic alignment
_vpaes_consts:
Lk_mc_forward:@ mc_forward
.quad	0x0407060500030201, 0x0C0F0E0D080B0A09
.quad	0x080B0A0904070605, 0x000302010C0F0E0D
.quad	0x0C0F0E0D080B0A09, 0x0407060500030201
.quad	0x000302010C0F0E0D, 0x080B0A0904070605
Lk_mc_backward:@ mc_backward
.quad	0x0605040702010003, 0x0E0D0C0F0A09080B
.quad	0x020100030E0D0C0F, 0x0A09080B06050407
.quad	0x0E0D0C0F0A09080B, 0x0605040702010003
.quad	0x0A09080B06050407, 0x020100030E0D0C0F
Lk_sr:@ sr
.quad	0x0706050403020100, 0x0F0E0D0C0B0A0908
.quad	0x030E09040F0A0500, 0x0B06010C07020D08
.quad	0x0F060D040B020900, 0x070E050C030A0108
.quad	0x0B0E0104070A0D00, 0x0306090C0F020508

@
@ "Hot" constants
@
Lk_inv:@ inv, inva
.quad	0x0E05060F0D080180, 0x040703090A0B0C02
.quad	0x01040A060F0B0780, 0x030D0E0C02050809
Lk_ipt:@ input transform (lo, hi)
.quad	0xC2B2E8985A2A7000, 0xCABAE09052227808
.quad	0x4C01307D317C4D00, 0xCD80B1FCB0FDCC81
Lk_sbo:@ sbou, sbot
.quad	0xD0D26D176FBDC700, 0x15AABF7AC502A878
.quad	0xCFE474A55FBB6A00, 0x8E1E90D1412B35FA
Lk_sb1:@ sb1u, sb1t
.quad	0x3618D415FAE22300, 0x3BF7CCC10D2ED9EF
.quad	0xB19BE18FCB503E00, 0xA5DF7A6E142AF544
Lk_sb2:@ sb2u, sb2t
.quad	0x69EB88400AE12900, 0xC2A163C8AB82234A
.quad	0xE27A93C60B712400, 0x5EB7E955BC982FCD

.byte	86,101,99,116,111,114,32,80,101,114,109,117,116,97,116,105,111,110,32,65,69,83,32,102,111,114,32,65,82,77,118,55,32,78,69,79,78,44,32,77,105,107,101,32,72,97,109,98,117,114,103,32,40,83,116,97,110,102,111,114,100,32,85,110,105,118,101,114,115,105,116,121,41,0
.align	2

.align	6
@@
@@  _aes_preheat
@@
@@  Fills q9-q15 as specified below.
@@
#ifdef __thumb2__
.thumb_func	_vpaes_preheat
#endif
.align	4
_vpaes_preheat:
	adr	r10, Lk_inv
	vmov.i8	q9, #0x0f		@ Lk_s0F
	vld1.64	{q10,q11}, [r10]!	@ Lk_inv
	add	r10, r10, #64		@ Skip Lk_ipt, Lk_sbo
	vld1.64	{q12,q13}, [r10]!	@ Lk_sb1
	vld1.64	{q14,q15}, [r10]	@ Lk_sb2
	bx	lr

@@
@@  _aes_encrypt_core
@@
@@  AES-encrypt q0.
@@
@@  Inputs:
@@     q0 = input
@@     q9-q15 as in _vpaes_preheat
@@    [r2] = scheduled keys
@@
@@  Output in q0
@@  Clobbers  q1-q5, r8-r11
@@  Preserves q6-q8 so you get some local vectors
@@
@@
#ifdef __thumb2__
.thumb_func	_vpaes_encrypt_core
#endif
.align	4
_vpaes_encrypt_core:
	mov	r9, r2
	ldr	r8, [r2,#240]		@ pull rounds
	adr	r11, Lk_ipt
	@ vmovdqa	.Lk_ipt(%rip),	%xmm2	# iptlo
	@ vmovdqa	.Lk_ipt+16(%rip), %xmm3	# ipthi
	vld1.64	{q2, q3}, [r11]
	adr	r11, Lk_mc_forward+16
	vld1.64	{q5}, [r9]!		@ vmovdqu	(%r9),	%xmm5		# round0 key
	vand	q1, q0, q9		@ vpand	%xmm9,	%xmm0,	%xmm1
	vshr.u8	q0, q0, #4		@ vpsrlb	$4,	%xmm0,	%xmm0
	vtbl.8	d2, {q2}, d2	@ vpshufb	%xmm1,	%xmm2,	%xmm1
	vtbl.8	d3, {q2}, d3
	vtbl.8	d4, {q3}, d0	@ vpshufb	%xmm0,	%xmm3,	%xmm2
	vtbl.8	d5, {q3}, d1
	veor	q0, q1, q5		@ vpxor	%xmm5,	%xmm1,	%xmm0
	veor	q0, q0, q2		@ vpxor	%xmm2,	%xmm0,	%xmm0

	@ .Lenc_entry ends with a bnz instruction which is normally paired with
	@ subs in .Lenc_loop.
	tst	r8, r8
	b	Lenc_entry

.align	4
Lenc_loop:
	@ middle of middle round
	add	r10, r11, #0x40
	vtbl.8	d8, {q13}, d4	@ vpshufb	%xmm2,	%xmm13,	%xmm4	# 4 = sb1u
	vtbl.8	d9, {q13}, d5
	vld1.64	{q1}, [r11]!		@ vmovdqa	-0x40(%r11,%r10), %xmm1	# Lk_mc_forward[]
	vtbl.8	d0, {q12}, d6	@ vpshufb	%xmm3,	%xmm12,	%xmm0	# 0 = sb1t
	vtbl.8	d1, {q12}, d7
	veor	q4, q4, q5		@ vpxor		%xmm5,	%xmm4,	%xmm4	# 4 = sb1u + k
	vtbl.8	d10, {q15}, d4	@ vpshufb	%xmm2,	%xmm15,	%xmm5	# 4 = sb2u
	vtbl.8	d11, {q15}, d5
	veor	q0, q0, q4		@ vpxor		%xmm4,	%xmm0,	%xmm0	# 0 = A
	vtbl.8	d4, {q14}, d6	@ vpshufb	%xmm3,	%xmm14,	%xmm2	# 2 = sb2t
	vtbl.8	d5, {q14}, d7
	vld1.64	{q4}, [r10]		@ vmovdqa	(%r11,%r10), %xmm4	# Lk_mc_backward[]
	vtbl.8	d6, {q0}, d2	@ vpshufb	%xmm1,	%xmm0,	%xmm3	# 0 = B
	vtbl.8	d7, {q0}, d3
	veor	q2, q2, q5		@ vpxor		%xmm5,	%xmm2,	%xmm2	# 2 = 2A
	@ Write to q5 instead of q0, so the table and destination registers do
	@ not overlap.
	vtbl.8	d10, {q0}, d8	@ vpshufb	%xmm4,	%xmm0,	%xmm0	# 3 = D
	vtbl.8	d11, {q0}, d9
	veor	q3, q3, q2		@ vpxor		%xmm2,	%xmm3,	%xmm3	# 0 = 2A+B
	vtbl.8	d8, {q3}, d2	@ vpshufb	%xmm1,	%xmm3,	%xmm4	# 0 = 2B+C
	vtbl.8	d9, {q3}, d3
	@ Here we restore the original q0/q5 usage.
	veor	q0, q5, q3		@ vpxor		%xmm3,	%xmm0,	%xmm0	# 3 = 2A+B+D
	and	r11, r11, #~(1<<6)	@ and		$0x30,	%r11		# ... mod 4
	veor	q0, q0, q4		@ vpxor		%xmm4,	%xmm0, %xmm0	# 0 = 2A+3B+C+D
	subs	r8, r8, #1		@ nr--

Lenc_entry:
	@ top of round
	vand	q1, q0, q9		@ vpand		%xmm0,	%xmm9,	%xmm1   # 0 = k
	vshr.u8	q0, q0, #4		@ vpsrlb	$4,	%xmm0,	%xmm0	# 1 = i
	vtbl.8	d10, {q11}, d2	@ vpshufb	%xmm1,	%xmm11,	%xmm5	# 2 = a/k
	vtbl.8	d11, {q11}, d3
	veor	q1, q1, q0		@ vpxor		%xmm0,	%xmm1,	%xmm1	# 0 = j
	vtbl.8	d6, {q10}, d0	@ vpshufb	%xmm0, 	%xmm10,	%xmm3  	# 3 = 1/i
	vtbl.8	d7, {q10}, d1
	vtbl.8	d8, {q10}, d2	@ vpshufb	%xmm1, 	%xmm10,	%xmm4  	# 4 = 1/j
	vtbl.8	d9, {q10}, d3
	veor	q3, q3, q5		@ vpxor		%xmm5,	%xmm3,	%xmm3	# 3 = iak = 1/i + a/k
	veor	q4, q4, q5		@ vpxor		%xmm5,	%xmm4,	%xmm4  	# 4 = jak = 1/j + a/k
	vtbl.8	d4, {q10}, d6	@ vpshufb	%xmm3,	%xmm10,	%xmm2  	# 2 = 1/iak
	vtbl.8	d5, {q10}, d7
	vtbl.8	d6, {q10}, d8	@ vpshufb	%xmm4,	%xmm10,	%xmm3	# 3 = 1/jak
	vtbl.8	d7, {q10}, d9
	veor	q2, q2, q1		@ vpxor		%xmm1,	%xmm2,	%xmm2  	# 2 = io
	veor	q3, q3, q0		@ vpxor		%xmm0,	%xmm3,	%xmm3	# 3 = jo
	vld1.64	{q5}, [r9]!		@ vmovdqu	(%r9),	%xmm5
	bne	Lenc_loop

	@ middle of last round
	add	r10, r11, #0x80

	adr	r11, Lk_sbo
	@ Read to q1 instead of q4, so the vtbl.8 instruction below does not
	@ overlap table and destination registers.
	vld1.64	{q1}, [r11]!		@ vmovdqa	-0x60(%r10), %xmm4	# 3 : sbou
	vld1.64	{q0}, [r11]		@ vmovdqa	-0x50(%r10), %xmm0	# 0 : sbot	Lk_sbo+16
	vtbl.8	d8, {q1}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4	# 4 = sbou
	vtbl.8	d9, {q1}, d5
	vld1.64	{q1}, [r10]		@ vmovdqa	0x40(%r11,%r10), %xmm1	# Lk_sr[]
	@ Write to q2 instead of q0 below, to avoid overlapping table and
	@ destination registers.
	vtbl.8	d4, {q0}, d6	@ vpshufb	%xmm3,	%xmm0,	%xmm0	# 0 = sb1t
	vtbl.8	d5, {q0}, d7
	veor	q4, q4, q5		@ vpxor	%xmm5,	%xmm4,	%xmm4	# 4 = sb1u + k
	veor	q2, q2, q4		@ vpxor	%xmm4,	%xmm0,	%xmm0	# 0 = A
	@ Here we restore the original q0/q2 usage.
	vtbl.8	d0, {q2}, d2	@ vpshufb	%xmm1,	%xmm0,	%xmm0
	vtbl.8	d1, {q2}, d3
	bx	lr


.globl	_vpaes_encrypt
.private_extern	_vpaes_encrypt
#ifdef __thumb2__
.thumb_func	_vpaes_encrypt
#endif
.align	4
_vpaes_encrypt:
	@ _vpaes_encrypt_core uses r8-r11. Round up to r7-r11 to maintain stack
	@ alignment.
	stmdb	sp!, {r7,r8,r9,r10,r11,lr}
	@ _vpaes_encrypt_core uses q4-q5 (d8-d11), which are callee-saved.
	vstmdb	sp!, {d8,d9,d10,d11}

	vld1.64	{q0}, [r0]
	bl	_vpaes_preheat
	bl	_vpaes_encrypt_core
	vst1.64	{q0}, [r1]

	vldmia	sp!, {d8,d9,d10,d11}
	ldmia	sp!, {r7,r8,r9,r10,r11, pc}	@ return


@
@  Decryption stuff
@

.align	4
_vpaes_decrypt_consts:
Lk_dipt:@ decryption input transform
.quad	0x0F505B040B545F00, 0x154A411E114E451A
.quad	0x86E383E660056500, 0x12771772F491F194
Lk_dsbo:@ decryption sbox final output
.quad	0x1387EA537EF94000, 0xC7AA6DB9D4943E2D
.quad	0x12D7560F93441D00, 0xCA4B8159D8C58E9C
Lk_dsb9:@ decryption sbox output *9*u, *9*t
.quad	0x851C03539A86D600, 0xCAD51F504F994CC9
.quad	0xC03B1789ECD74900, 0x725E2C9EB2FBA565
Lk_dsbd:@ decryption sbox output *D*u, *D*t
.quad	0x7D57CCDFE6B1A200, 0xF56E9B13882A4439
.quad	0x3CE2FAF724C6CB00, 0x2931180D15DEEFD3
Lk_dsbb:@ decryption sbox output *B*u, *B*t
.quad	0xD022649296B44200, 0x602646F6B0F2D404
.quad	0xC19498A6CD596700, 0xF3FF0C3E3255AA6B
Lk_dsbe:@ decryption sbox output *E*u, *E*t
.quad	0x46F2929626D4D000, 0x2242600464B4F6B0
.quad	0x0C55A6CDFFAAC100, 0x9467F36B98593E32


@@
@@  Decryption core
@@
@@  Same API as encryption core, except it clobbers q12-q15 rather than using
@@  the values from _vpaes_preheat. q9-q11 must still be set from
@@  _vpaes_preheat.
@@
#ifdef __thumb2__
.thumb_func	_vpaes_decrypt_core
#endif
.align	4
_vpaes_decrypt_core:
	mov	r9, r2
	ldr	r8, [r2,#240]		@ pull rounds

	@ This function performs shuffles with various constants. The x86_64
	@ version loads them on-demand into %xmm0-%xmm5. This does not work well
	@ for ARMv7 because those registers are shuffle destinations. The ARMv8
	@ version preloads those constants into registers, but ARMv7 has half
	@ the registers to work with. Instead, we load them on-demand into
	@ q12-q15, registers normally use for preloaded constants. This is fine
	@ because decryption doesn't use those constants. The values are
	@ constant, so this does not interfere with potential 2x optimizations.
	adr	r7, Lk_dipt

	vld1.64	{q12,q13}, [r7]		@ vmovdqa	Lk_dipt(%rip), %xmm2	# iptlo
	lsl	r11, r8, #4		@ mov		%rax,	%r11;	shl	$4, %r11
	eor	r11, r11, #0x30		@ xor		$0x30,	%r11
	adr	r10, Lk_sr
	and	r11, r11, #0x30		@ and		$0x30,	%r11
	add	r11, r11, r10
	adr	r10, Lk_mc_forward+48

	vld1.64	{q4}, [r9]!		@ vmovdqu	(%r9),	%xmm4		# round0 key
	vand	q1, q0, q9		@ vpand		%xmm9,	%xmm0,	%xmm1
	vshr.u8	q0, q0, #4		@ vpsrlb	$4,	%xmm0,	%xmm0
	vtbl.8	d4, {q12}, d2	@ vpshufb	%xmm1,	%xmm2,	%xmm2
	vtbl.8	d5, {q12}, d3
	vld1.64	{q5}, [r10]		@ vmovdqa	Lk_mc_forward+48(%rip), %xmm5
					@ vmovdqa	.Lk_dipt+16(%rip), %xmm1 # ipthi
	vtbl.8	d0, {q13}, d0	@ vpshufb	%xmm0,	%xmm1,	%xmm0
	vtbl.8	d1, {q13}, d1
	veor	q2, q2, q4		@ vpxor		%xmm4,	%xmm2,	%xmm2
	veor	q0, q0, q2		@ vpxor		%xmm2,	%xmm0,	%xmm0

	@ .Ldec_entry ends with a bnz instruction which is normally paired with
	@ subs in .Ldec_loop.
	tst	r8, r8
	b	Ldec_entry

.align	4
Ldec_loop:
@
@  Inverse mix columns
@

	@ We load .Lk_dsb* into q12-q15 on-demand. See the comment at the top of
	@ the function.
	adr	r10, Lk_dsb9
	vld1.64	{q12,q13}, [r10]!	@ vmovdqa	-0x20(%r10),%xmm4		# 4 : sb9u
					@ vmovdqa	-0x10(%r10),%xmm1		# 0 : sb9t
	@ Load sbd* ahead of time.
	vld1.64	{q14,q15}, [r10]!	@ vmovdqa	0x00(%r10),%xmm4		# 4 : sbdu
					@ vmovdqa	0x10(%r10),%xmm1		# 0 : sbdt
	vtbl.8	d8, {q12}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4		# 4 = sb9u
	vtbl.8	d9, {q12}, d5
	vtbl.8	d2, {q13}, d6	@ vpshufb	%xmm3,	%xmm1,	%xmm1		# 0 = sb9t
	vtbl.8	d3, {q13}, d7
	veor	q0, q4, q0		@ vpxor		%xmm4,	%xmm0,	%xmm0

	veor	q0, q0, q1		@ vpxor		%xmm1,	%xmm0,	%xmm0		# 0 = ch

	@ Load sbb* ahead of time.
	vld1.64	{q12,q13}, [r10]!	@ vmovdqa	0x20(%r10),%xmm4		# 4 : sbbu
					@ vmovdqa	0x30(%r10),%xmm1		# 0 : sbbt

	vtbl.8	d8, {q14}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4		# 4 = sbdu
	vtbl.8	d9, {q14}, d5
	@ Write to q1 instead of q0, so the table and destination registers do
	@ not overlap.
	vtbl.8	d2, {q0}, d10	@ vpshufb	%xmm5,	%xmm0,	%xmm0		# MC ch
	vtbl.8	d3, {q0}, d11
	@ Here we restore the original q0/q1 usage. This instruction is
	@ reordered from the ARMv8 version so we do not clobber the vtbl.8
	@ below.
	veor	q0, q1, q4		@ vpxor		%xmm4,	%xmm0,	%xmm0		# 4 = ch
	vtbl.8	d2, {q15}, d6	@ vpshufb	%xmm3,	%xmm1,	%xmm1		# 0 = sbdt
	vtbl.8	d3, {q15}, d7
					@ vmovdqa	0x20(%r10),	%xmm4		# 4 : sbbu
	veor	q0, q0, q1		@ vpxor		%xmm1,	%xmm0,	%xmm0		# 0 = ch
					@ vmovdqa	0x30(%r10),	%xmm1		# 0 : sbbt

	@ Load sbd* ahead of time.
	vld1.64	{q14,q15}, [r10]!	@ vmovdqa	0x40(%r10),%xmm4		# 4 : sbeu
					@ vmovdqa	0x50(%r10),%xmm1		# 0 : sbet

	vtbl.8	d8, {q12}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4		# 4 = sbbu
	vtbl.8	d9, {q12}, d5
	@ Write to q1 instead of q0, so the table and destination registers do
	@ not overlap.
	vtbl.8	d2, {q0}, d10	@ vpshufb	%xmm5,	%xmm0,	%xmm0		# MC ch
	vtbl.8	d3, {q0}, d11
	@ Here we restore the original q0/q1 usage. This instruction is
	@ reordered from the ARMv8 version so we do not clobber the vtbl.8
	@ below.
	veor	q0, q1, q4		@ vpxor		%xmm4,	%xmm0,	%xmm0		# 4 = ch
	vtbl.8	d2, {q13}, d6	@ vpshufb	%xmm3,	%xmm1,	%xmm1		# 0 = sbbt
	vtbl.8	d3, {q13}, d7
	veor	q0, q0, q1		@ vpxor		%xmm1,	%xmm0,	%xmm0		# 0 = ch

	vtbl.8	d8, {q14}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4		# 4 = sbeu
	vtbl.8	d9, {q14}, d5
	@ Write to q1 instead of q0, so the table and destination registers do
	@ not overlap.
	vtbl.8	d2, {q0}, d10	@ vpshufb	%xmm5,	%xmm0,	%xmm0		# MC ch
	vtbl.8	d3, {q0}, d11
	@ Here we restore the original q0/q1 usage. This instruction is
	@ reordered from the ARMv8 version so we do not clobber the vtbl.8
	@ below.
	veor	q0, q1, q4		@ vpxor		%xmm4,	%xmm0,	%xmm0		# 4 = ch
	vtbl.8	d2, {q15}, d6	@ vpshufb	%xmm3,	%xmm1,	%xmm1		# 0 = sbet
	vtbl.8	d3, {q15}, d7
	vext.8	q5, q5, q5, #12		@ vpalignr 	$12,	%xmm5,	%xmm5,	%xmm5
	veor	q0, q0, q1		@ vpxor		%xmm1,	%xmm0,	%xmm0		# 0 = ch
	subs	r8, r8, #1		@ sub		$1,%rax			# nr--

Ldec_entry:
	@ top of round
	vand	q1, q0, q9		@ vpand		%xmm9,	%xmm0,	%xmm1	# 0 = k
	vshr.u8	q0, q0, #4		@ vpsrlb	$4,	%xmm0,	%xmm0	# 1 = i
	vtbl.8	d4, {q11}, d2	@ vpshufb	%xmm1,	%xmm11,	%xmm2	# 2 = a/k
	vtbl.8	d5, {q11}, d3
	veor	q1, q1, q0		@ vpxor		%xmm0,	%xmm1,	%xmm1	# 0 = j
	vtbl.8	d6, {q10}, d0	@ vpshufb	%xmm0, 	%xmm10,	%xmm3	# 3 = 1/i
	vtbl.8	d7, {q10}, d1
	vtbl.8	d8, {q10}, d2	@ vpshufb	%xmm1,	%xmm10,	%xmm4	# 4 = 1/j
	vtbl.8	d9, {q10}, d3
	veor	q3, q3, q2		@ vpxor		%xmm2,	%xmm3,	%xmm3	# 3 = iak = 1/i + a/k
	veor	q4, q4, q2		@ vpxor		%xmm2, 	%xmm4,	%xmm4	# 4 = jak = 1/j + a/k
	vtbl.8	d4, {q10}, d6	@ vpshufb	%xmm3,	%xmm10,	%xmm2	# 2 = 1/iak
	vtbl.8	d5, {q10}, d7
	vtbl.8	d6, {q10}, d8	@ vpshufb	%xmm4,  %xmm10,	%xmm3	# 3 = 1/jak
	vtbl.8	d7, {q10}, d9
	veor	q2, q2, q1		@ vpxor		%xmm1,	%xmm2,	%xmm2	# 2 = io
	veor	q3, q3, q0		@ vpxor		%xmm0,  %xmm3,	%xmm3	# 3 = jo
	vld1.64	{q0}, [r9]!		@ vmovdqu	(%r9),	%xmm0
	bne	Ldec_loop

	@ middle of last round

	adr	r10, Lk_dsbo

	@ Write to q1 rather than q4 to avoid overlapping table and destination.
	vld1.64	{q1}, [r10]!		@ vmovdqa	0x60(%r10),	%xmm4	# 3 : sbou
	vtbl.8	d8, {q1}, d4	@ vpshufb	%xmm2,	%xmm4,	%xmm4	# 4 = sbou
	vtbl.8	d9, {q1}, d5
	@ Write to q2 rather than q1 to avoid overlapping table and destination.
	vld1.64	{q2}, [r10]		@ vmovdqa	0x70(%r10),	%xmm1	# 0 : sbot
	vtbl.8	d2, {q2}, d6	@ vpshufb	%xmm3,	%xmm1,	%xmm1	# 0 = sb1t
	vtbl.8	d3, {q2}, d7
	vld1.64	{q2}, [r11]		@ vmovdqa	-0x160(%r11),	%xmm2	# Lk_sr-Lk_dsbd=-0x160
	veor	q4, q4, q0		@ vpxor		%xmm0,	%xmm4,	%xmm4	# 4 = sb1u + k
	@ Write to q1 rather than q0 so the table and destination registers
	@ below do not overlap.
	veor	q1, q1, q4		@ vpxor		%xmm4,	%xmm1,	%xmm0	# 0 = A
	vtbl.8	d0, {q1}, d4	@ vpshufb	%xmm2,	%xmm0,	%xmm0
	vtbl.8	d1, {q1}, d5
	bx	lr


.globl	_vpaes_decrypt
.private_extern	_vpaes_decrypt
#ifdef __thumb2__
.thumb_func	_vpaes_decrypt
#endif
.align	4
_vpaes_decrypt:
	@ _vpaes_decrypt_core uses r7-r11.
	stmdb	sp!, {r7,r8,r9,r10,r11,lr}
	@ _vpaes_decrypt_core uses q4-q5 (d8-d11), which are callee-saved.
	vstmdb	sp!, {d8,d9,d10,d11}

	vld1.64	{q0}, [r0]
	bl	_vpaes_preheat
	bl	_vpaes_decrypt_core
	vst1.64	{q0}, [r1]

	vldmia	sp!, {d8,d9,d10,d11}
	ldmia	sp!, {r7,r8,r9,r10,r11, pc}	@ return

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@                                                    @@
@@                  AES key schedule                  @@
@@                                                    @@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@ This function diverges from both x86_64 and armv7 in which constants are
@ pinned. x86_64 has a common preheat function for all operations. aarch64
@ separates them because it has enough registers to pin nearly all constants.
@ armv7 does not have enough registers, but needing explicit loads and stores
@ also complicates using x86_64's register allocation directly.
@
@ We pin some constants for convenience and leave q14 and q15 free to load
@ others on demand.

@
@  Key schedule constants
@

.align	4
_vpaes_key_consts:
Lk_dksd:@ decryption key schedule: invskew x*D
.quad	0xFEB91A5DA3E44700, 0x0740E3A45A1DBEF9
.quad	0x41C277F4B5368300, 0x5FDC69EAAB289D1E
Lk_dksb:@ decryption key schedule: invskew x*B
.quad	0x9A4FCA1F8550D500, 0x03D653861CC94C99
.quad	0x115BEDA7B6FC4A00, 0xD993256F7E3482C8
Lk_dkse:@ decryption key schedule: invskew x*E + 0x63
.quad	0xD5031CCA1FC9D600, 0x53859A4C994F5086
.quad	0xA23196054FDC7BE8, 0xCD5EF96A20B31487
Lk_dks9:@ decryption key schedule: invskew x*9
.quad	0xB6116FC87ED9A700, 0x4AED933482255BFC
.quad	0x4576516227143300, 0x8BB89FACE9DAFDCE

Lk_rcon:@ rcon
.quad	0x1F8391B9AF9DEEB6, 0x702A98084D7C7D81

Lk_opt:@ output transform
.quad	0xFF9F4929D6B66000, 0xF7974121DEBE6808
.quad	0x01EDBD5150BCEC00, 0xE10D5DB1B05C0CE0
Lk_deskew:@ deskew tables: inverts the sbox's "skew"
.quad	0x07E4A34047A4E300, 0x1DFEB95A5DBEF91A
.quad	0x5F36B5DC83EA6900, 0x2841C2ABF49D1E77


#ifdef __thumb2__
.thumb_func	_vpaes_key_preheat
#endif
.align	4
_vpaes_key_preheat:
	adr	r11, Lk_rcon
	vmov.i8	q12, #0x5b			@ Lk_s63
	adr	r10, Lk_inv			@ Must be aligned to 8 mod 16.
	vmov.i8	q9, #0x0f			@ Lk_s0F
	vld1.64	{q10,q11}, [r10]		@ Lk_inv
	vld1.64	{q8}, [r11]			@ Lk_rcon
	bx	lr


#ifdef __thumb2__
.thumb_func	_vpaes_schedule_core
#endif
.align	4
_vpaes_schedule_core:
	@ We only need to save lr, but ARM requires an 8-byte stack alignment,
	@ so save an extra register.
	stmdb	sp!, {r3,lr}

	bl	_vpaes_key_preheat	@ load the tables

	adr	r11, Lk_ipt		@ Must be aligned to 8 mod 16.
	vld1.64	{q0}, [r0]!		@ vmovdqu	(%rdi),	%xmm0		# load key (unaligned)

	@ input transform
	@ Use q4 here rather than q3 so .Lschedule_am_decrypting does not
	@ overlap table and destination.
	vmov	q4, q0			@ vmovdqa	%xmm0,	%xmm3
	bl	_vpaes_schedule_transform
	adr	r10, Lk_sr		@ Must be aligned to 8 mod 16.
	vmov	q7, q0			@ vmovdqa	%xmm0,	%xmm7

	add	r8, r8, r10
	tst	r3, r3
	bne	Lschedule_am_decrypting

	@ encrypting, output zeroth round key after transform
	vst1.64	{q0}, [r2]		@ vmovdqu	%xmm0,	(%rdx)
	b	Lschedule_go

Lschedule_am_decrypting:
	@ decrypting, output zeroth round key after shiftrows
	vld1.64	{q1}, [r8]		@ vmovdqa	(%r8,%r10),	%xmm1
	vtbl.8	d6, {q4}, d2	@ vpshufb  	%xmm1,	%xmm3,	%xmm3
	vtbl.8	d7, {q4}, d3
	vst1.64	{q3}, [r2]		@ vmovdqu	%xmm3,	(%rdx)
	eor	r8, r8, #0x30		@ xor	$0x30, %r8

Lschedule_go:
	cmp	r1, #192		@ cmp	$192,	%esi
	bhi	Lschedule_256
	beq	Lschedule_192
	@ 128: fall though

@@
@@  .schedule_128
@@
@@  128-bit specific part of key schedule.
@@
@@  This schedule is really simple, because all its parts
@@  are accomplished by the subroutines.
@@
Lschedule_128:
	mov	r0, #10		@ mov	$10, %esi

Loop_schedule_128:
	bl	_vpaes_schedule_round
	subs	r0, r0, #1		@ dec	%esi
	beq	Lschedule_mangle_last
	bl	_vpaes_schedule_mangle	@ write output
	b	Loop_schedule_128

@@
@@  .aes_schedule_192
@@
@@  192-bit specific part of key schedule.
@@
@@  The main body of this schedule is the same as the 128-bit
@@  schedule, but with more smearing.  The long, high side is
@@  stored in q7 as before, and the short, low side is in
@@  the high bits of q6.
@@
@@  This schedule is somewhat nastier, however, because each
@@  round produces 192 bits of key material, or 1.5 round keys.
@@  Therefore, on each cycle we do 2 rounds and produce 3 round
@@  keys.
@@
.align	4
Lschedule_192:
	sub	r0, r0, #8
	vld1.64	{q0}, [r0]			@ vmovdqu	8(%rdi),%xmm0		# load key part 2 (very unaligned)
	bl	_vpaes_schedule_transform	@ input transform
	vmov	q6, q0				@ vmovdqa	%xmm0,	%xmm6		# save short part
	vmov.i8	d12, #0			@ vpxor	%xmm4,	%xmm4, %xmm4	# clear 4
						@ vmovhlps	%xmm4,	%xmm6,	%xmm6		# clobber low side with zeros
	mov	r0, #4			@ mov	$4,	%esi

Loop_schedule_192:
	bl	_vpaes_schedule_round
	vext.8	q0, q6, q0, #8			@ vpalignr	$8,%xmm6,%xmm0,%xmm0
	bl	_vpaes_schedule_mangle		@ save key n
	bl	_vpaes_schedule_192_smear
	bl	_vpaes_schedule_mangle		@ save key n+1
	bl	_vpaes_schedule_round
	subs	r0, r0, #1			@ dec	%esi
	beq	Lschedule_mangle_last
	bl	_vpaes_schedule_mangle		@ save key n+2
	bl	_vpaes_schedule_192_smear
	b	Loop_schedule_192

@@
@@  .aes_schedule_256
@@
@@  256-bit specific part of key schedule.
@@
@@  The structure here is very similar to the 128-bit
@@  schedule, but with an additional "low side" in
@@  q6.  The low side's rounds are the same as the
@@  high side's, except no rcon and no rotation.
@@
.align	4
Lschedule_256:
	vld1.64	{q0}, [r0]			@ vmovdqu	16(%rdi),%xmm0		# load key part 2 (unaligned)
	bl	_vpaes_schedule_transform	@ input transform
	mov	r0, #7			@ mov	$7, %esi

Loop_schedule_256:
	bl	_vpaes_schedule_mangle		@ output low result
	vmov	q6, q0				@ vmovdqa	%xmm0,	%xmm6		# save cur_lo in xmm6

	@ high round
	bl	_vpaes_schedule_round
	subs	r0, r0, #1			@ dec	%esi
	beq	Lschedule_mangle_last
	bl	_vpaes_schedule_mangle

	@ low round. swap xmm7 and xmm6
	vdup.32	q0, d1[1]		@ vpshufd	$0xFF,	%xmm0,	%xmm0
	vmov.i8	q4, #0
	vmov	q5, q7			@ vmovdqa	%xmm7,	%xmm5
	vmov	q7, q6			@ vmovdqa	%xmm6,	%xmm7
	bl	_vpaes_schedule_low_round
	vmov	q7, q5			@ vmovdqa	%xmm5,	%xmm7

	b	Loop_schedule_256

@@
@@  .aes_schedule_mangle_last
@@
@@  Mangler for last round of key schedule
@@  Mangles q0
@@    when encrypting, outputs out(q0) ^ 63
@@    when decrypting, outputs unskew(q0)
@@
@@  Always called right before return... jumps to cleanup and exits
@@
.align	4
Lschedule_mangle_last:
	@ schedule last round key from xmm0
	adr	r11, Lk_deskew			@ lea	Lk_deskew(%rip),%r11	# prepare to deskew
	tst	r3, r3
	bne	Lschedule_mangle_last_dec

	@ encrypting
	vld1.64	{q1}, [r8]		@ vmovdqa	(%r8,%r10),%xmm1
	adr	r11, Lk_opt		@ lea		Lk_opt(%rip),	%r11		# prepare to output transform
	add	r2, r2, #32		@ add		$32,	%rdx
	vmov	q2, q0
	vtbl.8	d0, {q2}, d2	@ vpshufb	%xmm1,	%xmm0,	%xmm0		# output permute
	vtbl.8	d1, {q2}, d3

Lschedule_mangle_last_dec:
	sub	r2, r2, #16			@ add	$-16,	%rdx
	veor	q0, q0, q12			@ vpxor	Lk_s63(%rip),	%xmm0,	%xmm0
	bl	_vpaes_schedule_transform	@ output transform
	vst1.64	{q0}, [r2]			@ vmovdqu	%xmm0,	(%rdx)		# save last key

	@ cleanup
	veor	q0, q0, q0		@ vpxor	%xmm0,	%xmm0,	%xmm0
	veor	q1, q1, q1		@ vpxor	%xmm1,	%xmm1,	%xmm1
	veor	q2, q2, q2		@ vpxor	%xmm2,	%xmm2,	%xmm2
	veor	q3, q3, q3		@ vpxor	%xmm3,	%xmm3,	%xmm3
	veor	q4, q4, q4		@ vpxor	%xmm4,	%xmm4,	%xmm4
	veor	q5, q5, q5		@ vpxor	%xmm5,	%xmm5,	%xmm5
	veor	q6, q6, q6		@ vpxor	%xmm6,	%xmm6,	%xmm6
	veor	q7, q7, q7		@ vpxor	%xmm7,	%xmm7,	%xmm7
	ldmia	sp!, {r3,pc}		@ return


@@
@@  .aes_schedule_192_smear
@@
@@  Smear the short, low side in the 192-bit key schedule.
@@
@@  Inputs:
@@    q7: high side, b  a  x  y
@@    q6:  low side, d  c  0  0
@@
@@  Outputs:
@@    q6: b+c+d  b+c  0  0
@@    q0: b+c+d  b+c  b  a
@@
#ifdef __thumb2__
.thumb_func	_vpaes_schedule_192_smear
#endif
.align	4
_vpaes_schedule_192_smear:
	vmov.i8	q1, #0
	vdup.32	q0, d15[1]
	vshl.i64	q1, q6, #32		@ vpshufd	$0x80,	%xmm6,	%xmm1	# d c 0 0 -> c 0 0 0
	vmov	d0, d15		@ vpshufd	$0xFE,	%xmm7,	%xmm0	# b a _ _ -> b b b a
	veor	q6, q6, q1		@ vpxor	%xmm1,	%xmm6,	%xmm6	# -> c+d c 0 0
	veor	q1, q1, q1		@ vpxor	%xmm1,	%xmm1,	%xmm1
	veor	q6, q6, q0		@ vpxor	%xmm0,	%xmm6,	%xmm6	# -> b+c+d b+c b a
	vmov	q0, q6			@ vmovdqa	%xmm6,	%xmm0
	vmov	d12, d2		@ vmovhlps	%xmm1,	%xmm6,	%xmm6	# clobber low side with zeros
	bx	lr


@@
@@  .aes_schedule_round
@@
@@  Runs one main round of the key schedule on q0, q7
@@
@@  Specifically, runs subbytes on the high dword of q0
@@  then rotates it by one byte and xors into the low dword of
@@  q7.
@@
@@  Adds rcon from low byte of q8, then rotates q8 for
@@  next rcon.
@@
@@  Smears the dwords of q7 by xoring the low into the
@@  second low, result into third, result into highest.
@@
@@  Returns results in q7 = q0.
@@  Clobbers q1-q4, r11.
@@
#ifdef __thumb2__
.thumb_func	_vpaes_schedule_round
#endif
.align	4
_vpaes_schedule_round:
	@ extract rcon from xmm8
	vmov.i8	q4, #0				@ vpxor		%xmm4,	%xmm4,	%xmm4
	vext.8	q1, q8, q4, #15		@ vpalignr	$15,	%xmm8,	%xmm4,	%xmm1
	vext.8	q8, q8, q8, #15	@ vpalignr	$15,	%xmm8,	%xmm8,	%xmm8
	veor	q7, q7, q1			@ vpxor		%xmm1,	%xmm7,	%xmm7

	@ rotate
	vdup.32	q0, d1[1]			@ vpshufd	$0xFF,	%xmm0,	%xmm0
	vext.8	q0, q0, q0, #1			@ vpalignr	$1,	%xmm0,	%xmm0,	%xmm0

	@ fall through...

	@ low round: same as high round, but no rotation and no rcon.
_vpaes_schedule_low_round:
	@ The x86_64 version pins .Lk_sb1 in %xmm13 and .Lk_sb1+16 in %xmm12.
	@ We pin other values in _vpaes_key_preheat, so load them now.
	adr	r11, Lk_sb1
	vld1.64	{q14,q15}, [r11]

	@ smear xmm7
	vext.8	q1, q4, q7, #12			@ vpslldq	$4,	%xmm7,	%xmm1
	veor	q7, q7, q1			@ vpxor	%xmm1,	%xmm7,	%xmm7
	vext.8	q4, q4, q7, #8			@ vpslldq	$8,	%xmm7,	%xmm4

	@ subbytes
	vand	q1, q0, q9			@ vpand		%xmm9,	%xmm0,	%xmm1		# 0 = k
	vshr.u8	q0, q0, #4			@ vpsrlb	$4,	%xmm0,	%xmm0		# 1 = i
	veor	q7, q7, q4			@ vpxor		%xmm4,	%xmm7,	%xmm7
	vtbl.8	d4, {q11}, d2		@ vpshufb	%xmm1,	%xmm11,	%xmm2		# 2 = a/k
	vtbl.8	d5, {q11}, d3
	veor	q1, q1, q0			@ vpxor		%xmm0,	%xmm1,	%xmm1		# 0 = j
	vtbl.8	d6, {q10}, d0		@ vpshufb	%xmm0, 	%xmm10,	%xmm3		# 3 = 1/i
	vtbl.8	d7, {q10}, d1
	veor	q3, q3, q2			@ vpxor		%xmm2,	%xmm3,	%xmm3		# 3 = iak = 1/i + a/k
	vtbl.8	d8, {q10}, d2		@ vpshufb	%xmm1,	%xmm10,	%xmm4		# 4 = 1/j
	vtbl.8	d9, {q10}, d3
	veor	q7, q7, q12			@ vpxor		Lk_s63(%rip),	%xmm7,	%xmm7
	vtbl.8	d6, {q10}, d6		@ vpshufb	%xmm3,	%xmm10,	%xmm3		# 2 = 1/iak
	vtbl.8	d7, {q10}, d7
	veor	q4, q4, q2			@ vpxor		%xmm2,	%xmm4,	%xmm4		# 4 = jak = 1/j + a/k
	vtbl.8	d4, {q10}, d8		@ vpshufb	%xmm4,	%xmm10,	%xmm2		# 3 = 1/jak
	vtbl.8	d5, {q10}, d9
	veor	q3, q3, q1			@ vpxor		%xmm1,	%xmm3,	%xmm3		# 2 = io
	veor	q2, q2, q0			@ vpxor		%xmm0,	%xmm2,	%xmm2		# 3 = jo
	vtbl.8	d8, {q15}, d6		@ vpshufb	%xmm3,	%xmm13,	%xmm4		# 4 = sbou
	vtbl.8	d9, {q15}, d7
	vtbl.8	d2, {q14}, d4		@ vpshufb	%xmm2,	%xmm12,	%xmm1		# 0 = sb1t
	vtbl.8	d3, {q14}, d5
	veor	q1, q1, q4			@ vpxor		%xmm4,	%xmm1,	%xmm1		# 0 = sbox output

	@ add in smeared stuff
	veor	q0, q1, q7			@ vpxor	%xmm7,	%xmm1,	%xmm0
	veor	q7, q1, q7			@ vmovdqa	%xmm0,	%xmm7
	bx	lr


@@
@@  .aes_schedule_transform
@@
@@  Linear-transform q0 according to tables at [r11]
@@
@@  Requires that q9 = 0x0F0F... as in preheat
@@  Output in q0
@@  Clobbers q1, q2, q14, q15
@@
#ifdef __thumb2__
.thumb_func	_vpaes_schedule_transform
#endif
.align	4
_vpaes_schedule_transform:
	vld1.64	{q14,q15}, [r11]	@ vmovdqa	(%r11),	%xmm2 	# lo
					@ vmovdqa	16(%r11),	%xmm1 # hi
	vand	q1, q0, q9		@ vpand	%xmm9,	%xmm0,	%xmm1
	vshr.u8	q0, q0, #4		@ vpsrlb	$4,	%xmm0,	%xmm0
	vtbl.8	d4, {q14}, d2	@ vpshufb	%xmm1,	%xmm2,	%xmm2
	vtbl.8	d5, {q14}, d3
	vtbl.8	d0, {q15}, d0	@ vpshufb	%xmm0,	%xmm1,	%xmm0
	vtbl.8	d1, {q15}, d1
	veor	q0, q0, q2		@ vpxor	%xmm2,	%xmm0,	%xmm0
	bx	lr


@@
@@  .aes_schedule_mangle
@@
@@  Mangles q0 from (basis-transformed) standard version
@@  to our version.
@@
@@  On encrypt,
@@    xor with 0x63
@@    multiply by circulant 0,1,1,1
@@    apply shiftrows transform
@@
@@  On decrypt,
@@    xor with 0x63
@@    multiply by "inverse mixcolumns" circulant E,B,D,9
@@    deskew
@@    apply shiftrows transform
@@
@@
@@  Writes out to [r2], and increments or decrements it
@@  Keeps track of round number mod 4 in r8
@@  Preserves q0
@@  Clobbers q1-q5
@@
#ifdef __thumb2__
.thumb_func	_vpaes_schedule_mangle
#endif
.align	4
_vpaes_schedule_mangle:
	tst	r3, r3
	vmov	q4, q0			@ vmovdqa	%xmm0,	%xmm4	# save xmm0 for later
	adr	r11, Lk_mc_forward	@ Must be aligned to 8 mod 16.
	vld1.64	{q5}, [r11]		@ vmovdqa	Lk_mc_forward(%rip),%xmm5
	bne	Lschedule_mangle_dec

	@ encrypting
	@ Write to q2 so we do not overlap table and destination below.
	veor	q2, q0, q12		@ vpxor		Lk_s63(%rip),	%xmm0,	%xmm4
	add	r2, r2, #16		@ add		$16,	%rdx
	vtbl.8	d8, {q2}, d10	@ vpshufb	%xmm5,	%xmm4,	%xmm4
	vtbl.8	d9, {q2}, d11
	vtbl.8	d2, {q4}, d10	@ vpshufb	%xmm5,	%xmm4,	%xmm1
	vtbl.8	d3, {q4}, d11
	vtbl.8	d6, {q1}, d10	@ vpshufb	%xmm5,	%xmm1,	%xmm3
	vtbl.8	d7, {q1}, d11
	veor	q4, q4, q1		@ vpxor		%xmm1,	%xmm4,	%xmm4
	vld1.64	{q1}, [r8]		@ vmovdqa	(%r8,%r10),	%xmm1
	veor	q3, q3, q4		@ vpxor		%xmm4,	%xmm3,	%xmm3

	b	Lschedule_mangle_both
.align	4
Lschedule_mangle_dec:
	@ inverse mix columns
	adr	r11, Lk_dksd 		@ lea		Lk_dksd(%rip),%r11
	vshr.u8	q1, q4, #4		@ vpsrlb	$4,	%xmm4,	%xmm1	# 1 = hi
	vand	q4, q4, q9		@ vpand		%xmm9,	%xmm4,	%xmm4	# 4 = lo

	vld1.64	{q14,q15}, [r11]! 	@ vmovdqa	0x00(%r11),	%xmm2
					@ vmovdqa	0x10(%r11),	%xmm3
	vtbl.8	d4, {q14}, d8	@ vpshufb	%xmm4,	%xmm2,	%xmm2
	vtbl.8	d5, {q14}, d9
	vtbl.8	d6, {q15}, d2	@ vpshufb	%xmm1,	%xmm3,	%xmm3
	vtbl.8	d7, {q15}, d3
	@ Load .Lk_dksb ahead of time.
	vld1.64	{q14,q15}, [r11]! 	@ vmovdqa	0x20(%r11),	%xmm2
					@ vmovdqa	0x30(%r11),	%xmm3
	@ Write to q13 so we do not overlap table and destination.
	veor	q13, q3, q2		@ vpxor		%xmm2,	%xmm3,	%xmm3
	vtbl.8	d6, {q13}, d10	@ vpshufb	%xmm5,	%xmm3,	%xmm3
	vtbl.8	d7, {q13}, d11

	vtbl.8	d4, {q14}, d8	@ vpshufb	%xmm4,	%xmm2,	%xmm2
	vtbl.8	d5, {q14}, d9
	veor	q2, q2, q3		@ vpxor		%xmm3,	%xmm2,	%xmm2
	vtbl.8	d6, {q15}, d2	@ vpshufb	%xmm1,	%xmm3,	%xmm3
	vtbl.8	d7, {q15}, d3
	@ Load .Lk_dkse ahead of time.
	vld1.64	{q14,q15}, [r11]! 	@ vmovdqa	0x40(%r11),	%xmm2
					@ vmovdqa	0x50(%r11),	%xmm3
	@ Write to q13 so we do not overlap table and destination.
	veor	q13, q3, q2		@ vpxor		%xmm2,	%xmm3,	%xmm3
	vtbl.8	d6, {q13}, d10	@ vpshufb	%xmm5,	%xmm3,	%xmm3
	vtbl.8	d7, {q13}, d11

	vtbl.8	d4, {q14}, d8	@ vpshufb	%xmm4,	%xmm2,	%xmm2
	vtbl.8	d5, {q14}, d9
	veor	q2, q2, q3		@ vpxor		%xmm3,	%xmm2,	%xmm2
	vtbl.8	d6, {q15}, d2	@ vpshufb	%xmm1,	%xmm3,	%xmm3
	vtbl.8	d7, {q15}, d3
	@ Load .Lk_dkse ahead of time.
	vld1.64	{q14,q15}, [r11]! 	@ vmovdqa	0x60(%r11),	%xmm2
					@ vmovdqa	0x70(%r11),	%xmm4
	@ Write to q13 so we do not overlap table and destination.
	veor	q13, q3, q2		@ vpxor		%xmm2,	%xmm3,	%xmm3

	vtbl.8	d4, {q14}, d8	@ vpshufb	%xmm4,	%xmm2,	%xmm2
	vtbl.8	d5, {q14}, d9
	vtbl.8	d6, {q13}, d10	@ vpshufb	%xmm5,	%xmm3,	%xmm3
	vtbl.8	d7, {q13}, d11
	vtbl.8	d8, {q15}, d2	@ vpshufb	%xmm1,	%xmm4,	%xmm4
	vtbl.8	d9, {q15}, d3
	vld1.64	{q1}, [r8]		@ vmovdqa	(%r8,%r10),	%xmm1
	veor	q2, q2, q3		@ vpxor	%xmm3,	%xmm2,	%xmm2
	veor	q3, q4, q2		@ vpxor	%xmm2,	%xmm4,	%xmm3

	sub	r2, r2, #16		@ add	$-16,	%rdx

Lschedule_mangle_both:
	@ Write to q2 so table and destination do not overlap.
	vtbl.8	d4, {q3}, d2	@ vpshufb	%xmm1,	%xmm3,	%xmm3
	vtbl.8	d5, {q3}, d3
	add	r8, r8, #64-16		@ add	$-16,	%r8
	and	r8, r8, #~(1<<6)	@ and	$0x30,	%r8
	vst1.64	{q2}, [r2]		@ vmovdqu	%xmm3,	(%rdx)
	bx	lr


.globl	_vpaes_set_encrypt_key
.private_extern	_vpaes_set_encrypt_key
#ifdef __thumb2__
.thumb_func	_vpaes_set_encrypt_key
#endif
.align	4
_vpaes_set_encrypt_key:
	stmdb	sp!, {r7,r8,r9,r10,r11, lr}
	vstmdb	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}

	lsr	r9, r1, #5		@ shr	$5,%eax
	add	r9, r9, #5		@ $5,%eax
	str	r9, [r2,#240]		@ mov	%eax,240(%rdx)	# AES_KEY->rounds = nbits/32+5;

	mov	r3, #0		@ mov	$0,%ecx
	mov	r8, #0x30		@ mov	$0x30,%r8d
	bl	_vpaes_schedule_core
	eor	r0, r0, r0

	vldmia	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}
	ldmia	sp!, {r7,r8,r9,r10,r11, pc}	@ return


.globl	_vpaes_set_decrypt_key
.private_extern	_vpaes_set_decrypt_key
#ifdef __thumb2__
.thumb_func	_vpaes_set_decrypt_key
#endif
.align	4
_vpaes_set_decrypt_key:
	stmdb	sp!, {r7,r8,r9,r10,r11, lr}
	vstmdb	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}

	lsr	r9, r1, #5		@ shr	$5,%eax
	add	r9, r9, #5		@ $5,%eax
	str	r9, [r2,#240]		@ mov	%eax,240(%rdx)	# AES_KEY->rounds = nbits/32+5;
	lsl	r9, r9, #4		@ shl	$4,%eax
	add	r2, r2, #16		@ lea	16(%rdx,%rax),%rdx
	add	r2, r2, r9

	mov	r3, #1		@ mov	$1,%ecx
	lsr	r8, r1, #1		@ shr	$1,%r8d
	and	r8, r8, #32		@ and	$32,%r8d
	eor	r8, r8, #32		@ xor	$32,%r8d	# nbits==192?0:32
	bl	_vpaes_schedule_core

	vldmia	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}
	ldmia	sp!, {r7,r8,r9,r10,r11, pc}	@ return


@ Additional constants for converting to bsaes.

.align	4
_vpaes_convert_consts:
@ .Lk_opt_then_skew applies skew(opt(x)) XOR 0x63, where skew is the linear
@ transform in the AES S-box. 0x63 is incorporated into the low half of the
@ table. This was computed with the following script:
@
@   def u64s_to_u128(x, y):
@       return x | (y << 64)
@   def u128_to_u64s(w):
@       return w & ((1<<64)-1), w >> 64
@   def get_byte(w, i):
@       return (w >> (i*8)) & 0xff
@   def apply_table(table, b):
@       lo = b & 0xf
@       hi = b >> 4
@       return get_byte(table[0], lo) ^ get_byte(table[1], hi)
@   def opt(b):
@       table = [
@           u64s_to_u128(0xFF9F4929D6B66000, 0xF7974121DEBE6808),
@           u64s_to_u128(0x01EDBD5150BCEC00, 0xE10D5DB1B05C0CE0),
@       ]
@       return apply_table(table, b)
@   def rot_byte(b, n):
@       return 0xff & ((b << n) | (b >> (8-n)))
@   def skew(x):
@       return (x ^ rot_byte(x, 1) ^ rot_byte(x, 2) ^ rot_byte(x, 3) ^
@               rot_byte(x, 4))
@   table = [0, 0]
@   for i in range(16):
@       table[0] |= (skew(opt(i)) ^ 0x63) << (i*8)
@       table[1] |= skew(opt(i<<4)) << (i*8)
@   print("	.quad	0x%016x, 0x%016x" % u128_to_u64s(table[0]))
@   print("	.quad	0x%016x, 0x%016x" % u128_to_u64s(table[1]))
Lk_opt_then_skew:
.quad	0x9cb8436798bc4763, 0x6440bb9f6044bf9b
.quad	0x1f30062936192f00, 0xb49bad829db284ab

@ .Lk_decrypt_transform is a permutation which performs an 8-bit left-rotation
@ followed by a byte-swap on each 32-bit word of a vector. E.g., 0x11223344
@ becomes 0x22334411 and then 0x11443322.
Lk_decrypt_transform:
.quad	0x0704050603000102, 0x0f0c0d0e0b08090a


@ void vpaes_encrypt_key_to_bsaes(AES_KEY *bsaes, const AES_KEY *vpaes);
.globl	_vpaes_encrypt_key_to_bsaes
.private_extern	_vpaes_encrypt_key_to_bsaes
#ifdef __thumb2__
.thumb_func	_vpaes_encrypt_key_to_bsaes
#endif
.align	4
_vpaes_encrypt_key_to_bsaes:
	stmdb	sp!, {r11, lr}

	@ See _vpaes_schedule_core for the key schedule logic. In particular,
	@ _vpaes_schedule_transform(.Lk_ipt) (section 2.2 of the paper),
	@ _vpaes_schedule_mangle (section 4.3), and .Lschedule_mangle_last
	@ contain the transformations not in the bsaes representation. This
	@ function inverts those transforms.
	@
	@ Note also that bsaes-armv7.pl expects aes-armv4.pl's key
	@ representation, which does not match the other aes_nohw_*
	@ implementations. The ARM aes_nohw_* stores each 32-bit word
	@ byteswapped, as a convenience for (unsupported) big-endian ARM, at the
	@ cost of extra REV and VREV32 operations in little-endian ARM.

	vmov.i8	q9, #0x0f		@ Required by _vpaes_schedule_transform
	adr	r2, Lk_mc_forward	@ Must be aligned to 8 mod 16.
	add	r3, r2, 0x90		@ Lk_sr+0x10-Lk_mc_forward = 0x90 (Apple's toolchain doesn't support the expression)

	vld1.64	{q12}, [r2]
	vmov.i8	q10, #0x5b		@ Lk_s63 from vpaes-x86_64
	adr	r11, Lk_opt		@ Must be aligned to 8 mod 16.
	vmov.i8	q11, #0x63		@ LK_s63 without Lk_ipt applied

	@ vpaes stores one fewer round count than bsaes, but the number of keys
	@ is the same.
	ldr	r2, [r1,#240]
	add	r2, r2, #1
	str	r2, [r0,#240]

	@ The first key is transformed with _vpaes_schedule_transform(.Lk_ipt).
	@ Invert this with .Lk_opt.
	vld1.64	{q0}, [r1]!
	bl	_vpaes_schedule_transform
	vrev32.8	q0, q0
	vst1.64	{q0}, [r0]!

	@ The middle keys have _vpaes_schedule_transform(.Lk_ipt) applied,
	@ followed by _vpaes_schedule_mangle. _vpaes_schedule_mangle XORs 0x63,
	@ multiplies by the circulant 0,1,1,1, then applies ShiftRows.
Loop_enc_key_to_bsaes:
	vld1.64	{q0}, [r1]!

	@ Invert the ShiftRows step (see .Lschedule_mangle_both). Note we cycle
	@ r3 in the opposite direction and start at .Lk_sr+0x10 instead of 0x30.
	@ We use r3 rather than r8 to avoid a callee-saved register.
	vld1.64	{q1}, [r3]
	vtbl.8	d4, {q0}, d2
	vtbl.8	d5, {q0}, d3
	add	r3, r3, #16
	and	r3, r3, #~(1<<6)
	vmov	q0, q2

	@ Handle the last key differently.
	subs	r2, r2, #1
	beq	Loop_enc_key_to_bsaes_last

	@ Multiply by the circulant. This is its own inverse.
	vtbl.8	d2, {q0}, d24
	vtbl.8	d3, {q0}, d25
	vmov	q0, q1
	vtbl.8	d4, {q1}, d24
	vtbl.8	d5, {q1}, d25
	veor	q0, q0, q2
	vtbl.8	d2, {q2}, d24
	vtbl.8	d3, {q2}, d25
	veor	q0, q0, q1

	@ XOR and finish.
	veor	q0, q0, q10
	bl	_vpaes_schedule_transform
	vrev32.8	q0, q0
	vst1.64	{q0}, [r0]!
	b	Loop_enc_key_to_bsaes

Loop_enc_key_to_bsaes_last:
	@ The final key does not have a basis transform (note
	@ .Lschedule_mangle_last inverts the original transform). It only XORs
	@ 0x63 and applies ShiftRows. The latter was already inverted in the
	@ loop. Note that, because we act on the original representation, we use
	@ q11, not q10.
	veor	q0, q0, q11
	vrev32.8	q0, q0
	vst1.64	{q0}, [r0]

	@ Wipe registers which contained key material.
	veor	q0, q0, q0
	veor	q1, q1, q1
	veor	q2, q2, q2

	ldmia	sp!, {r11, pc}	@ return


@ void vpaes_decrypt_key_to_bsaes(AES_KEY *vpaes, const AES_KEY *bsaes);
.globl	_vpaes_decrypt_key_to_bsaes
.private_extern	_vpaes_decrypt_key_to_bsaes
#ifdef __thumb2__
.thumb_func	_vpaes_decrypt_key_to_bsaes
#endif
.align	4
_vpaes_decrypt_key_to_bsaes:
	stmdb	sp!, {r11, lr}

	@ See _vpaes_schedule_core for the key schedule logic. Note vpaes
	@ computes the decryption key schedule in reverse. Additionally,
	@ aes-x86_64.pl shares some transformations, so we must only partially
	@ invert vpaes's transformations. In general, vpaes computes in a
	@ different basis (.Lk_ipt and .Lk_opt) and applies the inverses of
	@ MixColumns, ShiftRows, and the affine part of the AES S-box (which is
	@ split into a linear skew and XOR of 0x63). We undo all but MixColumns.
	@
	@ Note also that bsaes-armv7.pl expects aes-armv4.pl's key
	@ representation, which does not match the other aes_nohw_*
	@ implementations. The ARM aes_nohw_* stores each 32-bit word
	@ byteswapped, as a convenience for (unsupported) big-endian ARM, at the
	@ cost of extra REV and VREV32 operations in little-endian ARM.

	adr	r2, Lk_decrypt_transform
	adr	r3, Lk_sr+0x30
	adr	r11, Lk_opt_then_skew	@ Input to _vpaes_schedule_transform.
	vld1.64	{q12}, [r2]	@ Reuse q12 from encryption.
	vmov.i8	q9, #0x0f		@ Required by _vpaes_schedule_transform

	@ vpaes stores one fewer round count than bsaes, but the number of keys
	@ is the same.
	ldr	r2, [r1,#240]
	add	r2, r2, #1
	str	r2, [r0,#240]

	@ Undo the basis change and reapply the S-box affine transform. See
	@ .Lschedule_mangle_last.
	vld1.64	{q0}, [r1]!
	bl	_vpaes_schedule_transform
	vrev32.8	q0, q0
	vst1.64	{q0}, [r0]!

	@ See _vpaes_schedule_mangle for the transform on the middle keys. Note
	@ it simultaneously inverts MixColumns and the S-box affine transform.
	@ See .Lk_dksd through .Lk_dks9.
Loop_dec_key_to_bsaes:
	vld1.64	{q0}, [r1]!

	@ Invert the ShiftRows step (see .Lschedule_mangle_both). Note going
	@ forwards cancels inverting for which direction we cycle r3. We use r3
	@ rather than r8 to avoid a callee-saved register.
	vld1.64	{q1}, [r3]
	vtbl.8	d4, {q0}, d2
	vtbl.8	d5, {q0}, d3
	add	r3, r3, #64-16
	and	r3, r3, #~(1<<6)
	vmov	q0, q2

	@ Handle the last key differently.
	subs	r2, r2, #1
	beq	Loop_dec_key_to_bsaes_last

	@ Undo the basis change and reapply the S-box affine transform.
	bl	_vpaes_schedule_transform

	@ Rotate each word by 8 bytes (cycle the rows) and then byte-swap. We
	@ combine the two operations in .Lk_decrypt_transform.
	@
	@ TODO(davidben): Where does the rotation come from?
	vtbl.8	d2, {q0}, d24
	vtbl.8	d3, {q0}, d25

	vst1.64	{q1}, [r0]!
	b	Loop_dec_key_to_bsaes

Loop_dec_key_to_bsaes_last:
	@ The final key only inverts ShiftRows (already done in the loop). See
	@ .Lschedule_am_decrypting. Its basis is not transformed.
	vrev32.8	q0, q0
	vst1.64	{q0}, [r0]!

	@ Wipe registers which contained key material.
	veor	q0, q0, q0
	veor	q1, q1, q1
	veor	q2, q2, q2

	ldmia	sp!, {r11, pc}	@ return

.globl	_vpaes_ctr32_encrypt_blocks
.private_extern	_vpaes_ctr32_encrypt_blocks
#ifdef __thumb2__
.thumb_func	_vpaes_ctr32_encrypt_blocks
#endif
.align	4
_vpaes_ctr32_encrypt_blocks:
	mov	ip, sp
	stmdb	sp!, {r7,r8,r9,r10,r11, lr}
	@ This function uses q4-q7 (d8-d15), which are callee-saved.
	vstmdb	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}

	cmp	r2, #0
	@ r8 is passed on the stack.
	ldr	r8, [ip]
	beq	Lctr32_done

	@ _vpaes_encrypt_core expects the key in r2, so swap r2 and r3.
	mov	r9, r3
	mov	r3, r2
	mov	r2, r9

	@ Load the IV and counter portion.
	ldr	r7, [r8, #12]
	vld1.8	{q7}, [r8]

	bl	_vpaes_preheat
	rev	r7, r7		@ The counter is big-endian.

Lctr32_loop:
	vmov	q0, q7
	vld1.8	{q6}, [r0]!		@ Load input ahead of time
	bl	_vpaes_encrypt_core
	veor	q0, q0, q6		@ XOR input and result
	vst1.8	{q0}, [r1]!
	subs	r3, r3, #1
	@ Update the counter.
	add	r7, r7, #1
	rev	r9, r7
	vmov.32	d15[1], r9
	bne	Lctr32_loop

Lctr32_done:
	vldmia	sp!, {d8,d9,d10,d11,d12,d13,d14,d15}
	ldmia	sp!, {r7,r8,r9,r10,r11, pc}	@ return

#endif  // !OPENSSL_NO_ASM