MOVW R6, 28(R13)
	MOVW R7, 32(R13)
	MOVW R8, 36(R13)
	MOVW R9, 40(R13)
	MOVW R11, 44(R13)
	MOVW R12, 48(R13)
	MOVW CPSR, R0
	MOVW R0, 52(R13)
	MOVB ·goarmsoftfp(SB), R0
	CMP $0, R0
	BNE nofp
	MOVW FPCR, R0
	MOVW R0, 56(R13)
	MOVD F0, 60(R13)
	MOVD F1, 68(R13)
	MOVD F2, 76(R13)
	MOVD F3, 84(R13)
	MOVD F4, 92(R13)
	MOVD F5, 100(R13)
	MOVD F6, 108(R13)
	MOVD F7, 116(R13)
	MOVD F8, 124(R13)

	pc    uint64     // program counter
	cpsr  uint32     // current program status register
	__pad uint32
}

type neonstate64 struct {
	v    [64]uint64 // actually [32]uint128
	fpsr uint32
	fpcr uint32
}

type mcontext64 struct {
	es exceptionstate64
	ss regs64
	ns neonstate64
}

type ucontext struct {
	uc_onstack  int32
	uc_sigmask  uint32
	uc_stack    stackt

type context struct {
	contextflags uint32
	cpsr         uint32
	x            [31]uint64 // fp is x[29], lr is x[30]
	xsp          uint64
	pc           uint64
	v            [32]neon128
	fpcr         uint32
	fpsr         uint32
	bcr          [8]uint32
	bvr          [8]uint64
	wcr          [2]uint32
	wvr          [2]uint64
}

func (c *context) ip() uintptr { return uintptr(c.pc) }