llvm-6502/lib/Target/MSP430
2009-08-26 13:44:29 +00:00
..
AsmPrinter Add dummy inline asm handling for 'r' constraint. This fixes PR4778 2009-08-26 13:44:29 +00:00
TargetInfo
CMakeLists.txt Forgot to update some CMakeLists. 2009-08-22 22:20:11 +00:00
Makefile Give MSP430 a separate asmprinter lib 2009-08-14 18:28:12 +00:00
MSP430.h
MSP430.td
MSP430CallingConv.td
MSP430InstrFormats.td
MSP430InstrInfo.cpp
MSP430InstrInfo.h
MSP430InstrInfo.td Special constants as destinations does not work as expected - drop the patterns. 2009-08-05 14:42:00 +00:00
MSP430ISelDAGToDAG.cpp Fix some refactos for iostream changes (in -Asserts mode). 2009-08-23 08:50:52 +00:00
MSP430ISelLowering.cpp Add dummy inline asm handling for 'r' constraint. This fixes PR4778 2009-08-26 13:44:29 +00:00
MSP430ISelLowering.h Add dummy inline asm handling for 'r' constraint. This fixes PR4778 2009-08-26 13:44:29 +00:00
MSP430MachineFunctionInfo.h
MSP430MCAsmInfo.cpp Rename TargetAsmInfo (and its subclasses) to MCAsmInfo. 2009-08-22 20:48:53 +00:00
MSP430MCAsmInfo.h Rename TargetAsmInfo (and its subclasses) to MCAsmInfo. 2009-08-22 20:48:53 +00:00
MSP430RegisterInfo.cpp Provide dynamic_stackalloc lowering for MSP430. 2009-08-25 17:00:23 +00:00
MSP430RegisterInfo.h
MSP430RegisterInfo.td
MSP430Subtarget.cpp
MSP430Subtarget.h
MSP430TargetMachine.cpp Rename TargetAsmInfo (and its subclasses) to MCAsmInfo. 2009-08-22 20:48:53 +00:00
MSP430TargetMachine.h Change TargetAsmInfo to be constructed via TargetRegistry from a Target+Triple 2009-08-12 07:22:17 +00:00
README.txt

//===---------------------------------------------------------------------===//
// MSP430 backend.
//===---------------------------------------------------------------------===//

DISCLAIMER: Thid backend should be considered as highly experimental. I never
seen nor worked with this MCU, all information was gathered from datasheet
only. The original intention of making this backend was to write documentation
of form "How to write backend for dummies" :) Thes notes hopefully will be
available pretty soon.

Some things are incomplete / not implemented yet (this list surely is not
complete as well):

0. Implement asmprinting for variables :)

1. Verify, how stuff is handling implicit zext with 8 bit operands (this might
be modelled currently in improper way - should we need to mark the superreg as
def for every 8 bit instruction?).

2. Libcalls: multiplication, division, remainder. Note, that calling convention
for libcalls is incomptible with calling convention of libcalls of msp430-gcc
(these cannot be used though due to license restriction).

3. Implement multiplication / division by constant (dag combiner hook?).

4. Implement non-constant shifts.

5. Implement varargs stuff.

6. Verify and fix (if needed) how's stuff playing with i32 / i64.

7. Implement floating point stuff (softfp?)

8. Implement instruction encoding for (possible) direct code emission in the
future.

9. Since almost all instructions set flags - implement brcond / select in better
way (currently they emit explicit comparison).

10. Handle imm in comparisons in better way (see comment in MSP430InstrInfo.td)

11. Implement hooks for better memory op folding, etc.