Signed-off-by: Diego Biurrun <diego@biurrun.de>

The macro hell sometimes make it difficult to trace the source of
an error, so it is easier to analyze the preprocessed output.

This patch makes this automatical by specifying DBG=1 on the
command line: a file ffmpeg/dir/file.asm gets preprocessed to
builddir/dir/file.dbg.asm, which is then compiled.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

SPARC is no longer being used in any multimedia-related fields and the
VIS optimizations only represent a maintenance burden.

It does not help as an abstraction and adds dsputil dependencies.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This reverts commit f8a45fa1b1.

Conflicts:

	doc/optimization.txt

unless it stands for ffmpeg the program or is historic

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

This cleanup patch updates the developer documentation with respect to
the migration to the git scm.
(cherry picked from commit 87800dc2bf)

This cleanup patch updates the developer documentation with respect to
the migration to the git scm.

Originally committed as revision 25364 to svn://svn.ffmpeg.org/ffmpeg/trunk

- mention clobber-marking of xmm registers,
- some notes on external vs. inline asm, including tips on which to use for
   what situation and to not rewrite+improve in the same patch (as with C code)
- some more best-practice guidelines

See "[PATCH] update doc/optimization.txt" thread on ML.

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Originally committed as revision 16310 to svn://svn.ffmpeg.org/ffmpeg/trunk

It contains optimizations that are not specific to i386 and
libavutil uses this naming scheme already.

Originally committed as revision 16270 to svn://svn.ffmpeg.org/ffmpeg/trunk

Neither the asm() nor the __asm__() keyword is part of the C99
standard, but while GCC accepts the former in C89 syntax, it is not
accepted in C99 unless GNU extensions are turned on (with -fasm). The
latter form is accepted in any syntax as an extension (without
requiring further command-line options).

Sun Studio C99 compiler also does not accept asm() while accepting
__asm__(), albeit reporting warnings that it's not valid C99 syntax.

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can allso be used as a torture test for ur spelling checker

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