The csa_tables (which always consist of 32 entries of four byte each,
but the type depends upon whether the decoder is fixed or
floating-point) are currently initialized once during decoder
initialization; yet it turns out that this is actually no benefit: The
code used to initialize these tables takes up 153 (fixed point) and 122
(floating point) bytes when compiled with GCC 9.3 with -O3 on x64, so it
is better to just hardcode these tables.

Essentially the same applies to the is_tables: They have a size of 128B
each and the code to initialize them occupies 149 (fixed point) resp.
140 (floating point) bytes. So hardcode them, too.

To make the origin of the tables clear, references to the code used to
create them have been added.
Signed-off-by: NAndreas Rheinhardt <andreas.rheinhardt@gmail.com>

Understanding the mips32r6 and mips64r6 ISAs in the configure script is
not enough. In order to have full support for MIPS R6 in FFmpeg we need
to be able to build it, and for that we need to make sure we don't use
incompatible assembler code which makes the build fail. Ifdefing the
offending code is sufficient to fix the problem.
Signed-off-by: NVicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>

This mainly consists of replacing all the pointer arithmatic 'addiu'
instructions with PTR_ADDIU which will handle the differences in pointer
sizes when compiled on 64 bit mips systems.

The header asmdefs.h contains the PTR_ macros which expend to the correct mips
instructions to manipulate registers containing pointers.
Signed-off-by: NJames Cowgill <james410@cowgill.org.uk>
Reviewed-by: NNedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Reviewed-by: NJames Darnley <james.darnley@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

List of clobbered registers fixed and added where it is lacking.
Signed-off-by: NNedeljko Babic <nbabic@mips.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Add dependencies on HAVE_INLINE_ASM for files and parts of code
 where it is necessary.
Signed-off-by: NNedeljko Babic <nbabic@mips.com>
Reviewed-by: NVitor Sessak <vitor1001@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

__volatile__ can cause problems with some compilers and volatile is a standard keyword.
Found-by: NReimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

MP3 fixed and floating point decoders are optimized
 for MIPS architecture.
Signed-off-by: NNedeljko Babic <nbabic@mips.com>
Reviewed-by: NVitor Sessak <vitor1001@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>