Before this commit, the (32-bit only) simple idct came in three
versions: A pure MMX IDCT and idct-put and idct-add versions
which use SSE2 at the put and add stage, but still use pure MMX
for the actual IDCT.
This commit ports said IDCT to SSE2; this was entirely trivial
for the IDCT1-5 and IDCT7 parts (where one can directly use
the full register width) and was easy for IDCT6 and IDCT8
(involving a few movhps and pshufds). Unfortunately, DC_COND_INIT
and Z_COND_INIT still use only the lower half of the registers.
This saved 4658B here; the benchmarking option of the dct test tool
showed a 15% speedup.
Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The test has been removed in bfb28b5ce8
when MMX idctdsp functions overridden by SSE2 were removed;
ff_simple_idct_mmx() has been completely disabled in this patch
for x64 and so the test should have been disabled on x64 instead
of removing it.
Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
x64 always has MMX, MMXEXT, SSE and SSE2 and this means
that some functions for MMX, MMXEXT and 3dnow are always
overridden by other functions (unless one e.g. explicitly
disables SSE2) for x64. So given that the only systems that
benefit from these functions are truely ancient 32bit x86s
they are removed.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
x64 always has MMX, MMXEXT, SSE and SSE2 and this means
that some functions for MMX, MMXEXT and 3dnow are always
overridden by other functions (unless one e.g. explicitly
disables SSE2) for x64. So given that the only systems that
benefit from these functions are truely ancient 32bit x86s
they are removed.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
x64 always has MMX, MMXEXT, SSE and SSE2 and this means
that some functions for MMX, MMXEXT and 3dnow are always
overridden by other functions (unless one e.g. explicitly
disables SSE2) for x64. So given that the only systems that
benefit from these functions are truely ancient 32bit x86s
they are removed.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This avoids unnecessary rebuilds of most source files if only the
list of enabled components has changed, but not the other properties
of the build, set in config.h.
Signed-off-by: Martin Storsjö <martin@martin.st>
It is not used here at all; instead, add it where it is used without
including it or any of the arch-specific CPU headers.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
