llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-19 03:29:22 +00:00

History

Andrew Lenharth a697b8d83d Readme git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35533 91177308-0d34-0410-b5e6-96231b3b80d8		2007-03-31 15:05:44 +00:00
..
.cvsignore	ignore generated files	2005-09-07 23:47:44 +00:00
Alpha.h	Add all that branch mangling niftiness	2006-10-31 16:49:55 +00:00
Alpha.td	FTOIT and ITOFT are bit converts, and if we drop 21264s, are always available	2007-01-24 21:09:16 +00:00
AlphaAsmPrinter.cpp	Well this isn't as ugly and it works better. At least gcc bootstraps again	2007-02-13 23:41:16 +00:00
AlphaBranchSelector.cpp	MachineInstr::setOpcode -> MachineInstr::setInstrDescriptor	2006-11-30 07:12:03 +00:00
AlphaCodeEmitter.cpp	eliminate static ctors for Statistic objects.	2006-12-19 22:59:26 +00:00
AlphaInstrFormats.td	Add all that branch mangling niftiness	2006-10-31 16:49:55 +00:00
AlphaInstrInfo.cpp	What should be the last unnecessary <iostream>s in the library.	2006-12-07 22:21:48 +00:00
AlphaInstrInfo.h	Add all that branch mangling niftiness	2006-10-31 16:49:55 +00:00
AlphaInstrInfo.td	FTOIT and ITOFT are bit converts, and if we drop 21264s, are always available	2007-01-24 21:09:16 +00:00
AlphaISelDAGToDAG.cpp	FTOIT and ITOFT are bit converts, and if we drop 21264s, are always available	2007-01-24 21:09:16 +00:00
AlphaISelLowering.cpp	switch TargetLowering::getConstraintType to take the entire constraint,	2007-03-25 02:14:49 +00:00
AlphaISelLowering.h	switch TargetLowering::getConstraintType to take the entire constraint,	2007-03-25 02:14:49 +00:00
AlphaJITInfo.cpp	What should be the last unnecessary <iostream>s in the library.	2006-12-07 22:21:48 +00:00
AlphaJITInfo.h	Completely rearchitect the interface between targets and the pass manager.	2006-09-04 04:14:57 +00:00
AlphaLLRP.cpp	eliminate static ctors for Statistic objects.	2006-12-19 22:59:26 +00:00
AlphaRegisterInfo.cpp	Added MRegisterInfo hook to re-materialize an instruction.	2007-03-20 08:09:38 +00:00
AlphaRegisterInfo.h	Added MRegisterInfo hook to re-materialize an instruction.	2007-03-20 08:09:38 +00:00
AlphaRegisterInfo.td	Constify some methods. Patch provided by Anton Vayvod, thanks!	2006-08-17 22:00:08 +00:00
AlphaRelocations.h	Patches to make the LLVM sources more -pedantic clean. Patch provided	2006-05-24 17:04:05 +00:00
AlphaSchedule.td	Alpha Scheduling classes	2006-03-09 17:16:45 +00:00
AlphaSubtarget.cpp	FTOIT and ITOFT are bit converts, and if we drop 21264s, are always available	2007-01-24 21:09:16 +00:00
AlphaSubtarget.h	FTOIT and ITOFT are bit converts, and if we drop 21264s, are always available	2007-01-24 21:09:16 +00:00
AlphaTargetAsmInfo.cpp	Simplify a bit	2006-12-07 23:55:55 +00:00
AlphaTargetAsmInfo.h	Break out target asm info into separate files.	2006-09-07 22:05:02 +00:00
AlphaTargetMachine.cpp	Added new method to add a "simple" code emitter. That is, to only add	2007-02-08 01:38:33 +00:00
AlphaTargetMachine.h	Added new method to add a "simple" code emitter. That is, to only add	2007-02-08 01:38:33 +00:00
Makefile	Autogen subtarget information from .td files.	2005-10-23 22:15:34 +00:00
README.txt	Readme	2007-03-31 15:05:44 +00:00

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