llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-10-15 05:25:55 +00:00

History

David Greene 8ad4c00c00 Have TableGen emit setSubgraphColor calls under control of a -gen-debug flag. Then in a debugger developers can set breakpoints at these calls to see waht is about to be selected and what the resulting subgraph looks like. This really helps when debugging instruction selection. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58278 91177308-0d34-0410-b5e6-96231b3b80d8		2008-10-27 21:56:29 +00:00
..
Alpha.h
Alpha.td
AlphaAsmPrinter.cpp
AlphaBranchSelector.cpp
AlphaCodeEmitter.cpp
AlphaInstrFormats.td
AlphaInstrInfo.cpp	Const-ify several TargetInstrInfo methods.	2008-10-16 01:49:15 +00:00
AlphaInstrInfo.h	Const-ify several TargetInstrInfo methods.	2008-10-16 01:49:15 +00:00
AlphaInstrInfo.td	Change CALLSEQ_BEGIN and CALLSEQ_END to take TargetConstant's as	2008-10-11 22:08:30 +00:00
AlphaISelDAGToDAG.cpp	Have TableGen emit setSubgraphColor calls under control of a -gen-debug	2008-10-27 21:56:29 +00:00
AlphaISelLowering.cpp	Teach DAGCombine to fold constant offsets into GlobalAddress nodes,	2008-10-18 02:06:02 +00:00
AlphaISelLowering.h	Teach DAGCombine to fold constant offsets into GlobalAddress nodes,	2008-10-18 02:06:02 +00:00
AlphaJITInfo.cpp
AlphaJITInfo.h
AlphaLLRP.cpp
AlphaRegisterInfo.cpp
AlphaRegisterInfo.h
AlphaRegisterInfo.td
AlphaRelocations.h
AlphaSchedule.td
AlphaSubtarget.cpp
AlphaSubtarget.h
AlphaTargetAsmInfo.cpp
AlphaTargetAsmInfo.h
AlphaTargetMachine.cpp	mark some targets as experimental. Andrew, if you think that Alpha is	2008-10-16 06:16:50 +00:00
AlphaTargetMachine.h
CMakeLists.txt
Makefile
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