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work for 32 and 64 bit integers. Using these instead of inline asm may
offer better scheduling on x86, and additionally offers native
byteswapping on other platforms (PPC, ARM, etc).
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application code that wants to use loadstor.h, since that loads bswap.h
and if SSSE3 isn't enabled via -march GCC will error out. Doesn't seem to
be at all faster than the shuffle-based bswap for SSE2 on a Core2 in any case.
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Also, fix AltiVec detection on Linux and NetBSD for most G4s.
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but if SSE2 or SSSE3 is available uses SIMD magic to swap 4 32 bit values
at once.
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bswap.h); too many external apps rely on loadstor.h existing.
Define 64-bit generic bswap in terms of 32-bit bswap, since it's
not much slower if 32-bit is also generic, and much faster if
it's not. This may be quite helpful on 32-bit x86 in particular.
Change formulation of generic 32-bit bswap. It may be faster or
slower depending on the CPU, especially the latency and throuput
of rotate instructions, but should be faster on an ideally
superscalar processor with rotate instructions (ie, what I expect
future CPUs to look more like).
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Fixes for the amalgamation generator for internal headers.
Remove BOTAN_DLL exporting macros from all internal-only headers;
the classes/functions there don't need to be exported, and
avoiding the PIC/GOT indirection can be a big win.
Add missing BOTAN_DLLs where necessary, mostly gfpmath and cvc
For GCC, use -fvisibility=hidden and set BOTAN_DLL to the
visibility __attribute__ to export those classes/functions.
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of preventing the bswap optimizations from being used. :(
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used on Visual C++
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up during the Fedora submission review, that each source file include some
text about the license. One handy Perl script later and each file now has
the line
Distributed under the terms of the Botan license
after the copyright notices.
While I was in there modifying every file anyway, I also stripped out the
remainder of the block comments (lots of astericks before and after the
text); this is stylistic thing I picked up when I was first learning C++
but in retrospect it is not a good style as the structure makes it harder
to modify comments (with the result that comments become fewer, shorter and
are less likely to be updated, which are not good things).
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written by Yves Jerschow (sent to me in a personal email 2007-10-23).
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inline asm (currently, if __GNUG__ is defined, which works with both
GNU C++ and Intel C++, which are the only two compilers I know of that
accept GCC's inline asm syntax). Use that in bswap.h - previously we
would try to use inline asm even with VC++ or other compilers not supporting
inline asm.
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