Signed-off-by: Martin Storsjö <martin@martin.st>

cmp{p,s}{s,d} instructions do take an imm8 operand.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

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

Add simpler names and a shorthand for native atomics (as opposed to
pthreads fallback).

Signed-off-by: Anton Khirnov <anton@khirnov.net>

The named constant needs to be searched for in the same object on which
the option is set, i.e. target_obj.

The check `src > dst' in the form `&c->out[-back] > c->out' invokes
pointer overflow, which is undefined behavior in C.

Remove the check.  Also replace `&c->out[-back] < c->out_start' with
a safe form `c->out - c->out_start < back' to avoid overflow.

CC: libav-stable@libav.org
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This allows reporting missing features and requesting samples from
all libraries in a standard way; with a simplified API.

The mingw win32 atomics appear to be faulty, so they should not be used
if the gcc ones are available.
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes video playback in applications still using reordered_opaque.

On the current code, armcc will fail with:
"libavutil/atomic_gcc.h", line 52: Error:  #2771: first argument must be
a pointer to integer or enumeration type

Signed-off-by: Martin Storsjö <martin@martin.st>

Not all gcc configurations have an implementation of all the atomic
operations, and some gcc configurations have some atomic builtins
implemented but not all.

Thus check for the most essential function, whose presence should
indicate that all others are present as well, since it can be used
to implement all the other ones.
Signed-off-by: Martin Storsjö <martin@martin.st>

This makes them pass standalone compilation tests. Previously,
they included atomic.h which included themselves again, leading to
double definitions.
Signed-off-by: Martin Storsjö <martin@martin.st>

Add AVBuffer-based reference counting API to it.

This field is private and should not be present in a public struct. It
is only used in DXVA with mpegvideo-based decoders currently.

These could be used for reference counting, or for keeping track of
decoding progress in references in multithreaded decoders.

Support is provided by gcc/msvc/suncc intrinsics, with a fallback using
pthread mutexes.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Martin Storsjö <martin@martin.st>

Make sure the behavior does not change with the locale.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

The value is within 0 and 32.

Remove an `array subscript is below array bounds` warning.

The functions are private.

CC:libav-stable@libav.org

The "CentaurHauls family 6 model 9 stepping 8" family of CPUs
(flags: fpu vme de pse tsc msr cx8 sep mtrr pge mov pat mmx fxsr sse
up rng rng_en ace ace_en) SIGILLs on long nop codes.
Signed-off-by: Martin Storsjö <martin@martin.st>