if e.ID != vid {
			continue
		}
		if e.regs[0] == r {
			// Already known and highest priority
			return
		}
		for j := 1; j < len(e.regs); j++ {
			if e.regs[j] == r {
				// Move from lower priority to top priority
				copy(e.regs[1:], e.regs[:j])
				e.regs[0] = r
				return
			}
		}
		copy(e.regs[1:], e.regs[:])
		e.regs[0] = r
		return
	}

#define Y1    V3 // Not modified
#define T0    V4 // Result
#define T1    V5 // Result
#define P0    V30 // Not modified
#define P1    V31 // Not modified

// Temporaries: lots of reused vector regs
#define YDIG  V6 // Overloaded with CAR2
#define ADD1H V7 // Overloaded with ADD3H
#define ADD2H V8 // Overloaded with ADD4H
#define ADD3  V9 // Overloaded with SEL2,SEL5
#define ADD4  V10 // Overloaded with SEL3,SEL6

// func p256PointAddAffineAsm(res, in1 *P256Point, in2 *p256AffinePoint, sign, sel, zero int)
#define P3ptr   R1
#define P1ptr   R2
#define P2ptr   R3
#define CPOOL   R4

// Temporaries in REGs
#define Y2L    V15
#define Y2H    V16
#define T1L    V17
#define T1H    V18
#define T2L    V19
#define T2H    V20
#define T3L    V21
#define T3H    V22
#define T4L    V23

			if last.absent() {
				state.f.Fatalf("at %v: slot %v in register %v with no location entry", v, state.slots[slot], &state.registers[reg])
				continue
			}
			regs := last.Registers &^ (1 << reg)
			setSlot(slot, VarLoc{regs, last.StackOffset})
		}

		locs.registers[reg] = locs.registers[reg][:0]
	}

	switch {
	case v.Op == OpVarDef:
		n := v.Aux.(*ir.Name)
		if ir.IsSynthetic(n) {

	return ptracePtr(PTRACE_GETREGSET, pid, uintptr(elfNT_PRSTATUS), unsafe.Pointer(&iov))
}

func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
	var iov Iovec
	iov.Base = (*byte)(unsafe.Pointer(regs))
	iov.SetLen(int(unsafe.Sizeof(*regs)))
	return ptracePtr(PTRACE_SETREGSET, pid, uintptr(elfNT_PRSTATUS), unsafe.Pointer(&iov))
}

func PtraceSetOptions(pid int, options int) (err error) {

	case ssa.OpPPC64MOVDaddr:
		switch v.Aux.(type) {
		default:
			v.Fatalf("aux in MOVDaddr is of unknown type %T", v.Aux)
		case nil:
			// If aux offset and aux int are both 0, and the same
			// input and output regs are used, no instruction
			// needs to be generated, since it would just be
			// addi rx, rx, 0.
			if v.AuxInt != 0 || v.Args[0].Reg() != v.Reg() {
				p := s.Prog(ppc64.AMOVD)
				p.From.Type = obj.TYPE_ADDR

	} else {
		p.To.Sym = ctxt.Lookup("runtime.morestack")
	}
	if to_more != nil {
		to_more.To.SetTarget(p)
	}
	jalToSym(ctxt, p, REG_X5)

	// The instructions which unspill regs should be preemptible.
	p = ctxt.EndUnsafePoint(p, newprog, -1)
	p = cursym.Func().UnspillRegisterArgs(p, newprog)

	// JMP start
	p = obj.Appendp(p, newprog)
	p.As = AJAL
	p.To = obj.Addr{Type: obj.TYPE_BRANCH}