llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-08-03 00:29:31 +00:00

History

Dan Gohman ea859be53c Move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits from TargetLowering to SelectionDAG so that they have more convenient access to the current DAG, in preparation for the ValueType routines being changed from standalone functions to members of SelectionDAG for the pre-legalize vector type changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37704 91177308-0d34-0410-b5e6-96231b3b80d8		2007-06-22 14:59:07 +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	For PR1336:	2007-04-16 14:06:19 +00:00
AlphaAsmPrinter.cpp	Removed tabs everywhere except autogenerated & external files. Add make	2007-04-16 18:10:23 +00:00
AlphaBranchSelector.cpp	Drop 'const'	2007-05-03 01:11:54 +00:00
AlphaCodeEmitter.cpp	Drop 'const'	2007-05-03 01:11:54 +00:00
AlphaInstrFormats.td	Use this nifty Constraints thing and fix the inverted conditional moves	2007-04-17 04:07:59 +00:00
AlphaInstrInfo.cpp	Handle blocks with 2 unconditional branches in AnalyzeBranch.	2007-06-13 17:59:52 +00:00
AlphaInstrInfo.h	RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted.	2007-05-18 00:05:48 +00:00
AlphaInstrInfo.td	Use this nifty Constraints thing and fix the inverted conditional moves	2007-04-17 04:07:59 +00:00
AlphaISelDAGToDAG.cpp	Move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits from	2007-06-22 14:59:07 +00:00
AlphaISelLowering.cpp	Removed tabs everywhere except autogenerated & external files. Add make	2007-04-16 18:10:23 +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	Drop 'const'	2007-05-03 01:11:54 +00:00
AlphaRegisterInfo.cpp	eliminateFrameIndex() change.	2007-05-01 09:13:03 +00:00
AlphaRegisterInfo.h	eliminateFrameIndex() change.	2007-05-01 09:13:03 +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