t.intRegs = 1
		t.setAlg(ANOEQ)
		t.ptrBytes = int64(PtrSize)

	// function is 3 cated structures;
	// compute their widths as side-effect.
	case TFUNCARGS:
		t1 := t.FuncArgs()
		// TODO(mdempsky): Should package abi be responsible for computing argwid?
		w = calcStructOffset(t1, t1.Recvs(), 0)
		w = calcStructOffset(t1, t1.Params(), w)
		w = RoundUp(w, int64(RegSize))