// by the CPU correctly.
func (r *RegArgs) IntRegArgAddr(reg int, argSize uintptr) unsafe.Pointer {
	if argSize > goarch.PtrSize || argSize == 0 || argSize&(argSize-1) != 0 {
		panic("invalid argSize")
	}
	offset := uintptr(0)
	if goarch.BigEndian {
		offset = goarch.PtrSize - argSize
	}
	return unsafe.Pointer(uintptr(unsafe.Pointer(&r.Ints[reg])) + offset)
}

}

// intFromReg loads an argSize sized integer from reg and places it at to.
//
// argSize must be non-zero, fit in a register, and a power-of-two.
func intFromReg(r *abi.RegArgs, reg int, argSize uintptr, to unsafe.Pointer) {
	memmove(to, r.IntRegArgAddr(reg, argSize), argSize)
}

// intToReg loads an argSize sized integer and stores it into reg.
//
// argSize must be non-zero, fit in a register, and a power-of-two.

	}
	argp := a.data
	var argSize uintptr
	if argp != nil {
		argSize = (*ptrtype)(unsafe.Pointer(a._type)).Elem.Size_
	}

	h := new(debugCallHandler)
	h.gp = gp
	// gp may not be running right now, but we can still get the M
	// it will run on since it's locked.
	h.mp = gp.lockedm.ptr()
	h.fv, h.regArgs, h.argp, h.argSize = fv, regArgs, argp, argSize

	// Write the argument frame size.
	*(*uintptr)(unsafe.Pointer(uintptr(sp - 16))) = h.argSize
	// Save current registers.
	h.sigCtxt.savedRegs = *ctxt.regs()
}

// case 0
func (h *debugCallHandler) debugCallRun(ctxt *sigctxt) {
	sp := ctxt.sp()
	memmove(unsafe.Pointer(uintptr(sp)+8), h.argp, h.argSize)
	if h.regArgs != nil {
		storeRegArgs(ctxt.regs(), h.regArgs)
	}

	// Write the argument frame size.
	*(*uintptr)(unsafe.Pointer(uintptr(sp - 32))) = h.argSize
	// Save current registers.
	h.sigCtxt.savedRegs = *ctxt.cregs()
}

// case 0
func (h *debugCallHandler) debugCallRun(ctxt *sigctxt) {
	sp := ctxt.sp()
	memmove(unsafe.Pointer(uintptr(sp)+32), h.argp, h.argSize)
	if h.regArgs != nil {
		storeRegArgs(ctxt.cregs(), h.regArgs)
	}

	*(*uintptr)(unsafe.Pointer(uintptr(rsp - 16))) = h.argSize
	// Save current registers.
	h.sigCtxt.savedRegs = *ctxt.regs()
	h.sigCtxt.savedFP = *h.sigCtxt.savedRegs.fpstate
	h.sigCtxt.savedRegs.fpstate = nil
}

// case 0
func (h *debugCallHandler) debugCallRun(ctxt *sigctxt) {
	rsp := ctxt.rsp()
	memmove(unsafe.Pointer(uintptr(rsp)), h.argp, h.argSize)
	if h.regArgs != nil {
		storeRegArgs(ctxt.regs(), h.regArgs)
	}

func FuncLayout(t Type, rcvr Type) (frametype Type, argSize, retOffset uintptr, stack, gc, inReg, outReg []byte, ptrs bool) {
	var ft *abi.Type
	var abid abiDesc
	if rcvr != nil {
		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.common())), rcvr.common())
	} else {
		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.(*rtype))), nil)
	}
	// Extract size information.
	argSize = abid.stackCallArgsSize
	retOffset = abid.retOffset

		{name: "LoweredTailCall", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", call: true, tailCall: true},                  // tail call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem

		p.errorf("TEXT %q: ABIInternal requires NOSPLIT", name)
	}

	// Next operand is the frame and arg size.
	// Bizarre syntax: $frameSize-argSize is two words, not subtraction.
	// Both frameSize and argSize must be simple integers; only frameSize
	// can be negative.
	// The "-argSize" may be missing; if so, set it to objabi.ArgsSizeUnknown.
	// Parse left to right.
	op := operands[next]
	if len(op) < 2 || op[0].ScanToken != '$' {

// no pointers to heap objects in its local stack variables.
#define NO_LOCAL_POINTERS	FUNCDATA $FUNCDATA_LocalsPointerMaps, no_pointers_stackmap(SB)

// ArgsSizeUnknown is set in Func.argsize to mark all functions
// whose argument size is unknown (C vararg functions, and
// assembly code without an explicit specification).
// This value is generated by the compiler, assembler, or linker.