llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-11 23:05:31 +00:00

History

Eli Friedman 26689ac37e New approach to r136737: insert the necessary fences for atomic ops in platform-independent code, since a bunch of platforms (ARM, Mips, PPC, Alpha are the relevant targets here) need to do essentially the same thing. I think this completes the basic CodeGen for atomicrmw and cmpxchg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136813 91177308-0d34-0410-b5e6-96231b3b80d8		2011-08-03 21:06:02 +00:00
..
MCTargetDesc	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
TargetInfo	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
Alpha.h	Next round of MC refactoring. This patch factor MC table instantiations, MC	2011-07-14 20:59:42 +00:00
Alpha.td	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00
AlphaAsmPrinter.cpp
AlphaBranchSelector.cpp
AlphaCallingConv.td
AlphaFrameLowering.cpp
AlphaFrameLowering.h
AlphaInstrFormats.td
AlphaInstrInfo.cpp	Next round of MC refactoring. This patch factor MC table instantiations, MC	2011-07-14 20:59:42 +00:00
AlphaInstrInfo.h	Hide the call to InitMCInstrInfo into tblgen generated ctor.	2011-07-01 17:57:27 +00:00
AlphaInstrInfo.td	Code generation for 'fence' instruction.	2011-07-27 22:21:52 +00:00
AlphaISelDAGToDAG.cpp
AlphaISelLowering.cpp	New approach to r136737: insert the necessary fences for atomic ops in platform-independent code, since a bunch of platforms (ARM, Mips, PPC, Alpha are the relevant targets here) need to do essentially the same thing.	2011-08-03 21:06:02 +00:00
AlphaISelLowering.h	Move Alpha from getRegClassForInlineAsmConstraint to	2011-06-29 19:40:01 +00:00
AlphaLLRP.cpp
AlphaMachineFunctionInfo.h
AlphaRegisterInfo.cpp	Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for	2011-07-18 22:29:13 +00:00
AlphaRegisterInfo.h	Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down	2011-07-18 20:57:22 +00:00
AlphaRegisterInfo.td	Use set operations instead of plain lists to enumerate register classes.	2011-06-15 23:28:14 +00:00
AlphaRelocations.h
AlphaSchedule.td
AlphaSelectionDAGInfo.cpp
AlphaSelectionDAGInfo.h
AlphaSubtarget.cpp	Next round of MC refactoring. This patch factor MC table instantiations, MC	2011-07-14 20:59:42 +00:00
AlphaSubtarget.h	Compute feature bits at time of MCSubtargetInfo initialization.	2011-07-07 07:07:08 +00:00
AlphaTargetMachine.cpp	- Move CodeModel from a TargetMachine global option to MCCodeGenInfo.	2011-07-20 07:51:56 +00:00
AlphaTargetMachine.h	- Move CodeModel from a TargetMachine global option to MCCodeGenInfo.	2011-07-20 07:51:56 +00:00
CMakeLists.txt	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
Makefile	Next round of MC refactoring. This patch factor MC table instantiations, MC	2011-07-14 20:59:42 +00:00
README.txt	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +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 across bytes of bytewise abs(i8v8 a - i8v8 b))

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

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