Current GCC versions know how to generate these instructions
properly and avoiding inline asm gives better code. The MULH
function for ARMv5 uses the same instruction and is also not
needed any more.
The MLS64 macro remains since negating an input would normally
not be allowed as it would fail for INT_MIN. In our uses, the
inputs never have this value and thus negating is safe.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Prior to ARMv6, the destination registers of the SMULL instruction
must be distinct from the first source register. Marking the
output early-clobber ensures it is allocated unique registers.
This restriction is dropped in ARMv6 and later, so allowing overlap
between input and output registers there might give better code.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This enables UAL syntax for all asm files instead of only those
which happen to be incompatible with the old, deprecated syntax.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This function uses old-style vector operations deprecated in VFPv3.
Some implementations, e.g. Cortex-A9, support them only through
slow software emulation. Cortex-A8 does have this functionality
in hardware, but as it also has NEON, this function is not used
there regardless.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Surround memset and ff_vp8_dct_cat_prob by X() in order to fix iOS build
Includes patch by Luca Barbato <lu_zero@gentoo.org>.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This patch lets e.g. dsputil_init chose dsp functions with respect to
the bit depth to decode. The naming scheme of bit depth dependent
functions is <base name>_<bit depth>[_<prefix>] (i.e. the old
clear_blocks_c is now named clear_blocks_8_c).
Note: Some of the functions for high bit depth is not dependent on the
bit depth, but only on the pixel size. This leaves some room for
optimizing binary size.
Preparatory patch for high bit depth h264 decoding support.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
The assembler emits literal pools too far from the load instructions,
so we must do it explicitly at a suitable location.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This will be beneficial for use with the audio conversion API without
requiring it to depend on all of dsputil.
Signed-off-by: Mans Rullgard <mans@mansr.com>
This moves the fields needed by asm near the top, before any
structs or other members which complicate the offset calculation.
Modifying other structs will no longer require updating the offsets,
and the asm code is slightly simpler due to the smaller offsets.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Apparently Apple platforms do not handle movw/movt relocations
properly, leading to runtime crashes in code using them.
Originally committed as revision 25150 to svn://svn.ffmpeg.org/ffmpeg/trunk
Mans Rullgard
Justin Ruggles
Diego Biurrun
Martin Aumüller
Ronald S. Bultje
Oskar Arvidsson
Loren Merritt
Janne Grunau
Martin Storsjö
Luca Barbato
Stefano Sabatini