llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-03 08:55:51 +00:00

History

Chris Lattner f0144127b9 Rip all of the global variable lowering logic out of TargetAsmInfo. Since it is highly specific to the object file that will be generated in the end, this introduces a new TargetLoweringObjectFile interface that is implemented for each of ELF/MachO/COFF/Alpha/PIC16 and XCore. Though still is still a brutal and ugly refactoring, this is a major step towards goodness. This patch also: 1. fixes a bunch of dangling pointer problems in the PIC16 backend. 2. disables the TargetLowering copy ctor which PIC16 was accidentally using. 3. gets us closer to xcore having its own crazy target section flags and pic16 not having to shadow sections with its own objects. 4. fixes wierdness where ELF targets would set CStringSection but not CStringSection_. Factor the code better. 5. fixes some bugs in string lowering on ELF targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8		2009-07-28 03:13:23 +00:00
..
AsmPrinter	Rip all of the global variable lowering logic out of TargetAsmInfo. Since	2009-07-28 03:13:23 +00:00
TargetInfo	Factor commonality in triple match routines into helper template for registering	2009-07-26 05:03:33 +00:00
Alpha.h	Add new helpers for registering targets.	2009-07-25 06:49:55 +00:00
Alpha.td	Switch Alpha over to the new call lowering style. New code mostly	2009-07-19 01:11:32 +00:00
AlphaBranchSelector.cpp
AlphaCallingConv.td	Switch Alpha over to the new call lowering style. New code mostly	2009-07-19 01:11:32 +00:00
AlphaCodeEmitter.cpp
AlphaInstrFormats.td
AlphaInstrInfo.cpp	Remove unused member functions.	2009-07-24 07:43:59 +00:00
AlphaInstrInfo.h	Remove unused member functions.	2009-07-24 07:43:59 +00:00
AlphaInstrInfo.td
AlphaISelDAGToDAG.cpp	Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types. More to come.	2009-07-24 23:12:02 +00:00
AlphaISelLowering.cpp	Rip all of the global variable lowering logic out of TargetAsmInfo. Since	2009-07-28 03:13:23 +00:00
AlphaISelLowering.h	Switch Alpha over to the new call lowering style. New code mostly	2009-07-19 01:11:32 +00:00
AlphaJITInfo.cpp
AlphaJITInfo.h
AlphaLLRP.cpp
AlphaMachineFunctionInfo.h
AlphaRegisterInfo.cpp
AlphaRegisterInfo.h
AlphaRegisterInfo.td
AlphaRelocations.h
AlphaSchedule.td
AlphaSubtarget.cpp
AlphaSubtarget.h
AlphaTargetAsmInfo.cpp	Rip all of the global variable lowering logic out of TargetAsmInfo. Since	2009-07-28 03:13:23 +00:00
AlphaTargetAsmInfo.h	alpha doesn't need to redefine this: it only supports PIC codegen anyway.	2009-07-21 23:41:35 +00:00
AlphaTargetMachine.cpp	Add new helpers for registering targets.	2009-07-25 06:49:55 +00:00
AlphaTargetMachine.h
CMakeLists.txt	Unbreak build	2009-07-19 01:33:04 +00:00
Makefile	Unbreak build	2009-07-19 01:33:04 +00:00
README.txt

README.txt

***

add gcc builtins for alpha instructions


***

custom expand byteswap into nifty 
extract/insert/mask byte/word/longword/quadword low/high
sequences

***

see if any of the extract/insert/mask operations can be added

***

match more interesting things for cmovlbc cmovlbs (move if low bit clear/set)

***

lower srem and urem

remq(i,j):  i - (j * divq(i,j)) if j != 0
remqu(i,j): i - (j * divqu(i,j)) if j != 0
reml(i,j):  i - (j * divl(i,j)) if j != 0
remlu(i,j): i - (j * divlu(i,j)) if j != 0

***

add crazy vector instructions (MVI):

(MIN|MAX)(U|S)(B8|W4) min and max, signed and unsigned, byte and word
PKWB, UNPKBW pack/unpack word to byte
PKLB UNPKBL pack/unpack long to byte
PERR pixel error (sum accross bytes of bytewise abs(i8v8 a - i8v8 b))

cmpbytes bytewise cmpeq of i8v8 a and i8v8 b (not part of MVI extentions)

this has some good examples for other operations that can be synthesised well 
from these rather meager vector ops (such as saturating add).
http://www.alphalinux.org/docs/MVI-full.html