BitMagic library version 3.6.1 released

• Elias Gamma decoding optimizations significantly improved bit-vector de-serialization performance. Compressed bit-vectors now save disk space and IO bandwidth without big CPU costs
• Fixed stack overrun introduced in 3.6.0
• First version of SSE 4.2 optimizations for Nehalem (Core i5, i7, etc). Tested with MSVC 2008 and GCC 4.4.1. Use BMSSE42OPT to turn on SSE4.2 support in the code.
  

64-bit portability checklist

Useful article from developers of PVS Studio tool on porting to 64-bit systems.

20 issues of porting C++ code on the 64-bit platform

SSE4.2 readyness. GCC vs MSVC. Deathmatch.

GCC 4.3.2 (cygwin) vs MS VC++ 2008 (Windows 7).

First results porting BitMagic Library to Intel Nehalem SSE4.2 instruction set. :-)

1>Generating code
1>c:\dev\bm\src\bmsse4.h(140) : fatal error C1001: An internal error has occurred in the compiler.
1>(compiler file 'f:\dd\vctools\compiler\utc\src\p2\main.c[0x60375DBB:0x00000000]', line 182)
1> To work around this problem, try simplifying or changing the program near the locations listed above.
1>Please choose the Technical Support command on the Visual C++ 
1> Help menu, or open the Technical Support help file for more information
1>LINK : fatal error LNK1000: Internal error during IMAGE::BuildImage
1>  Version 9.00.30729.01
1>  ExceptionCode            = C0000005
1>  ExceptionFlags           = 00000000
1>  ExceptionAddress         = 60375DBB (60300000) "C:\Program Files\Microsoft Visual Studio 9.0\VC\bin\c2.dll"
1>  NumberParameters         = 00000002
1>  ExceptionInformation[ 0] = 00000000
1>  ExceptionInformation[ 1] = 00000000
1>CONTEXT:
1>  Eax    = 031F666C  Esp    = 0034EC78
1>  Ebx    = 00000000  Ebp    = 0034ECA4
1>  Ecx    = 00000000  Esi    = 03214298
1>  Edx    = 00000000  Edi    = 03201608
1>  Eip    = 60375DBB  EFlags = 00010246
1>  SegCs  = 0000001B  SegDs  = 00000023
1>  SegSs  = 00000023  SegEs  = 00000023
1>  SegFs  = 0000003B  SegGs  = 00000000
1>  Dr0    = 00000000  Dr3    = 00000000
1>  Dr1    = 00000000  Dr6    = 00000000
1>  Dr2    = 00000000  Dr7    = 00000000
1>Build log was saved at "file://c:\dev\bm\bmperf\Release\BuildLog.htm"
1>bmperf - 2 error(s), 5 warning(s)




$ make
======= Building : BitMagic Library Performance Test cygwin GNU_CC
< perf.cpp >
g++ -msse4 -march=core2 -Wall -c  -D_REENTRANT -DCYGWIN_NT -D_GNU_SOURCE  -Wno-d
eprecated    -I/cygdrive/c/dev/bm/src  perf.cpp -o /cygdrive/c/dev/bm/tests/perf
/Release/perf.o -g0 -O2 -march=core2 -fomit-frame-pointer -pipe
perf.cpp: In function 'void EnumeratorTest()':
perf.cpp:497: internal compiler error: in memory_address_length, at config/i386/
i386.c:16380
Please submit a full bug report,
with preprocessed source if appropriate.
See  for instructions.
make: *** [/cygdrive/c/dev/bm/tests/perf/Release/perf.o] Error 1