MOVD x+8(FP), R8
	MOVD y+16(FP), R9

	MOVD $0, R1 // i*8 = 0
	MOVD $0, R7 // i = 0
	MOVD $0, R0 // make sure it's zero
	MOVD $0, R4 // c = 0

	MOVD   R5, R12
	AND    $-2, R12
	CMPBGE R5, $2, A6
	BR     E6

A6:
	MOVD   (R8)(R1*1), R6
	MULHDU R9, R6
	MOVD   (R2)(R1*1), R10
	ADDC   R10, R11        // add to low order bits
	ADDE   R0, R6
	ADDC   R4, R11
	ADDE   R0, R6
	MOVD   R6, R4
	MOVD   R11, (R2)(R1*1)

00000320  80 04 98 fd 33 19 76 49  8f fe 5a 0f 22 69 3e eb  |....3.vI..Z."i>.|
00000330  d8 eb 51 71 17 03 03 00  99 42 4d 4b db 37 6c c3  |..Qq.....BMK.7l.|
00000340  fb 93 1f a6 7a 86 3c 5e  88 e5 75 d4 a1 73 4a b3  |....z.<^..u..sJ.|
00000350  0b 99 f1 a6 98 5f 6d 0f  00 0e 4f fa a3 5e 7d f0  |....._m...O..^}.|
00000360  41 dd dd 5c 71 3b 10 f9  75 07 d5 6c f2 83 83 5c  |A..\q;..u..l...\|

>>> Flow 1 (client to server)
00000000  16 03 01 00 ca 01 00 00  c6 03 03 be 5b 8c 08 2b  |............[..+|
00000010  26 a0 41 0f e3 4e b6 5c  9f 5d 53 04 67 4a 1d a2  |&.A..N.\.]S.gJ..|
00000020  26 3b 83 ab b4 7b c6 ec  f8 a6 41 20 a6 de ad e2  |&;...{....A ....|
00000030  0c fd 02 99 11 51 c6 be  e8 52 df 0b e2 b3 6f fe  |.....Q...R....o.|
00000040  33 3e 2f 90 ac d2 e8 a2  53 8b d9 05 00 04 13 01  |3>/.....S.......|

00000060  00 00 16 03 03 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|
000000a0  55 04 0a 13 02 47 6f 31  10 30 0e 06 03 55 04 03  |U....Go1.0...U..|

00000060  00 00 16 03 02 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|
00000090  86 f7 0d 01 01 0b 05 00  30 1f 31 0b 30 09 06 03  |........0.1.0...|
000000a0  55 04 0a 13 02 47 6f 31  10 30 0e 06 03 55 04 03  |U....Go1.0...U..|

#include "funcdata.h"

//
// System call support for ARM, NetBSD
//

// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
// func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32)

TEXT	·Syscall(SB),NOSPLIT,$0-28
	BL runtime·entersyscall(SB)
	MOVW trap+0(FP), R0 // sigcall num
	MOVW a1+4(FP), R1 // a1

00000070  2e 8f 09 67 fd a7 24 20  3e b2 56 1c ce 97 28 5e  |...g..$ >.V...(^|
00000080  f8 2b 2d 4f 9e f1 07 9f  6c 4b 5b 83 56 e2 32 42  |.+-O....lK[.V.2B|
00000090  e9 58 b6 d7 49 a6 b5 68  1a 41 03 56 6b dc 5a 89  |.X..I..h.A.Vk.Z.|
000000a0  14 03 03 00 01 01 17 03  03 00 17 f8 6a 35 d1 d7  |............j5..|
000000b0  a0 09 48 20 66 ea 1d 4e  a4 05 2b d6 24 ea 0d cb  |..H f..N..+.$...|

//

// func Syscall9(trap trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr);
// Actually Syscall8 but the rest of the code expects it to be named Syscall9.
TEXT ·Syscall9(SB),NOSPLIT,$28-52
	NO_LOCAL_POINTERS
	JAL	runtime·entersyscall(SB)
	MOVW	a1+4(FP), R4
	MOVW	a2+8(FP), R5
	MOVW	a3+12(FP), R6
	MOVW	a4+16(FP), R7
	MOVW	a5+20(FP), R8
	MOVW	a6+24(FP), R9
	MOVW	a7+28(FP), R10
	MOVW	a8+32(FP), R11

#define INVOKE_SYSCALL	INT	$0x80

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
//
// Syscall # in AX, args in BX CX DX SI DI BP, return in AX
TEXT ·Syscall6(SB),NOSPLIT,$0-40
	MOVL	num+0(FP), AX	// syscall entry
	MOVL	a1+4(FP), BX
	MOVL	a2+8(FP), CX
	MOVL	a3+12(FP), DX
	MOVL	a4+16(FP), SI
	MOVL	a5+20(FP), DI
	MOVL	a6+24(FP), BP
	INVOKE_SYSCALL
	CMPL	AX, $0xfffff001
	JLS	ok

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
//
// We need to convert to the syscall ABI.
//
// arg | ABIInternal | Syscall
// ---------------------------
// num | R4          | R11
// a1  | R5          | R4
// a2  | R6          | R5
// a3  | R7          | R6
// a4  | R8          | R7
// a5  | R9          | R8
// a6  | R10         | R9
//
// r1  | R4          | R4