possible bug with LuaJIT 2.0.3
- From: Francesco Abbate <francesco.bbt@xxxxxxxxx>
- To: luajit <luajit@xxxxxxxxxxxxx>
- Date: Thu, 27 Mar 2014 21:44:26 +0100
Hi,
working in the LuaJIT language toolkit I've found what seems to be a
bug in LuaJIT 2.0.3. If you run the code:
https://github.com/franko/luajit-lang-toolkit/blob/master/tests/fft-1.lua
you will sometimes obtain garbage output for the final inverse FFT
transform. It does not happen all the time but if you compile luajit
with debugging options:
# Disable optimization flags
#CCOPT= -O2 -fomit-frame-pointer
CCDEBUG= -g
XCFLAGS+= -DLUAJIT_USE_SYSMALLOC -DLUAJIT_USE_VALGRIND -DLUA_USE_ASSERT
then it happens all the time (at least on my system) and it disappears
if you use "-joff".
Here the LuaJIT welcome message on my system:
> LuaJIT 2.0.3 -- Copyright (C) 2005-2014 Mike Pall. http://luajit.org/
> JIT: ON CMOV SSE2 SSE3 ATOM fold cse dce fwd dse narrow loop abc sink fuse
The FFT code is extracted from the Scimark.lua benchmark but I was
checking the output instead of just checking the timing.
Francesco
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