t = r ^ uint32(k0>>32)
	l ^= feistelBox[7][t&0x3f] ^
		feistelBox[5][(t>>8)&0x3f] ^
		feistelBox[3][(t>>16)&0x3f] ^
		feistelBox[1][(t>>24)&0x3f]

	t = ((r << 28) | (r >> 4)) ^ uint32(k0)
	l ^= feistelBox[6][(t)&0x3f] ^
		feistelBox[4][(t>>8)&0x3f] ^
		feistelBox[2][(t>>16)&0x3f] ^
		feistelBox[0][(t>>24)&0x3f]

	t = l ^ uint32(k1>>32)
	r ^= feistelBox[7][t&0x3f] ^
		feistelBox[5][(t>>8)&0x3f] ^

	EAGAIN          = Errno(0xb)
	EALREADY        = Errno(0x95)
	EBADE           = Errno(0x32)
	EBADF           = Errno(0x9)
	EBADFD          = Errno(0x51)
	EBADMSG         = Errno(0x4d)
	EBADR           = Errno(0x33)
	EBADRQC         = Errno(0x36)
	EBADSLT         = Errno(0x37)
	EBFONT          = Errno(0x39)
	EBUSY           = Errno(0x10)
	ECANCELED       = Errno(0x2f)
	ECHILD          = Errno(0xa)

	WIN_WRITE_LONG                              = 0x32
	WIN_WRITE_LONG_ONCE                         = 0x33
	WIN_WRITE_ONCE                              = 0x31
	WIN_WRITE_SAME                              = 0xe9
	WIN_WRITE_VERIFY                            = 0x3c
	WNOHANG                                     = 0x1
	WNOTHREAD                                   = 0x20000000
	WNOWAIT                                     = 0x1000000

	SOL_SOCKET                       = 0x1
	SO_ACCEPTCONN                    = 0x1e
	SO_ATTACH_BPF                    = 0x32
	SO_ATTACH_REUSEPORT_CBPF         = 0x33
	SO_ATTACH_REUSEPORT_EBPF         = 0x34
	SO_BINDTODEVICE                  = 0x19
	SO_BINDTOIFINDEX                 = 0x3e
	SO_BPF_EXTENSIONS                = 0x30
	SO_BROADCAST                     = 0x6
	SO_BSDCOMPAT                     = 0xe

	SOL_SOCKET                       = 0x1
	SO_ACCEPTCONN                    = 0x1e
	SO_ATTACH_BPF                    = 0x32
	SO_ATTACH_REUSEPORT_CBPF         = 0x33
	SO_ATTACH_REUSEPORT_EBPF         = 0x34
	SO_BINDTODEVICE                  = 0x19
	SO_BINDTOIFINDEX                 = 0x3e
	SO_BPF_EXTENSIONS                = 0x30
	SO_BROADCAST                     = 0x6
	SO_BSDCOMPAT                     = 0xe

	SOL_SOCKET                       = 0x1
	SO_ACCEPTCONN                    = 0x1e
	SO_ATTACH_BPF                    = 0x32
	SO_ATTACH_REUSEPORT_CBPF         = 0x33
	SO_ATTACH_REUSEPORT_EBPF         = 0x34
	SO_BINDTODEVICE                  = 0x19
	SO_BINDTOIFINDEX                 = 0x3e
	SO_BPF_EXTENSIONS                = 0x30
	SO_BROADCAST                     = 0x6
	SO_BSDCOMPAT                     = 0xe

	// to how other linkers handle this (for example this code in lld:
	// https://github.com/llvm/llvm-project/blob/2a3a79ce4c2149d7787d56f9841b66cacc9061d0/lld/MachO/Writer.cpp#L524).
	rv[6] &= 0xcf
	rv[6] |= 0x30
	rv[8] &= 0x3f
	rv[8] |= 0xc0

	return rv
}

// machoRewriteUuid copies over the contents of the Macho executable
// exef into the output file outexe, and in the process updates the

	b[1] = b[(v>>20)&0xFF]
	// ppc64x: "RLWNM", -"SLD"
	b[2] = b[((uint64((uint32(v) >> 21)) & 0x3f) << 4)]
	// ppc64x: "RLWNM\t[$]11, R[0-9]+, [$]10, [$]15"
	c[0] = c[((v>>5)&0x3F)<<16]
	// ppc64x: "RLWNM\t[$]0, R[0-9]+, [$]19, [$]24"
	c[1] = c[((v>>7)&0x3F)<<7]
}

func checkShiftMask(a uint32, b uint64, z []uint32, y []uint64) {
	_ = y[128]
	_ = z[128]

	IFLA_PARENT_DEV_BUS_NAME                   = 0x39
	IFLA_GRO_MAX_SIZE                          = 0x3a
	IFLA_TSO_MAX_SIZE                          = 0x3b
	IFLA_TSO_MAX_SEGS                          = 0x3c
	IFLA_ALLMULTI                              = 0x3d
	IFLA_DEVLINK_PORT                          = 0x3e
	IFLA_GSO_IPV4_MAX_SIZE                     = 0x3f
	IFLA_GRO_IPV4_MAX_SIZE                     = 0x40

		p256PointDoubleAsm(p, p)

		if index < 192 {
			wvalue = ((scalar[index/64] >> (index % 64)) + (scalar[index/64+1] << (64 - (index % 64)))) & 0x3f
		} else {
			wvalue = (scalar[index/64] >> (index % 64)) & 0x3f
		}

		sel, sign = boothW5(uint(wvalue))

		p256Select(&t0, &precomp, sel)
		p256NegCond(&t0.y, sign)
		p256PointAddAsm(&t1, p, &t0)
		p256MovCond(&t1, &t1, p, sel)