Displaying 1 result from an estimated 1 matches for "mc6809reg".
2019 Mar 25
2
Overlapping register groups in old 8-bit MC6809 processor.
...can be 8- or 16-bit, and 2 of the 8-bit registers make up one of the 16-bit registers (A + B make D).
See https://en.wikipedia.org/wiki/Motorola_6809
it is legal to (e.g.) "TFR A,B", or "EXG D,X", but I've having a problem setting these registers up in my lib/Target/MC6809/MC6809RegisterInfo.td -
//===-- MC6809RegisterInfo.td - MC6809 Register defs -------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===-------------------...