FFmpeg

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Andreas Rheinhardt 52ba2ac7bd avfilter/x86/vf_fspp: Port mul_thrmat to SSE2

This fixes an ABI violation, as mul_thrmat did not issue emms.
It seems that this ABI violation could reach the user, namely
if ff_get_video_buffer() fails. Notice that ff_get_video_buffer()
itself could fail because of this, namely if the allocator uses
floating point registers.

On x64 (where GCC already used SSE2 in the C version)
mul_thrmat_c:                                            4.4 ( 1.00x)
mul_thrmat_mmx:                                          8.6 ( 0.52x)
mul_thrmat_sse2:                                         4.4 ( 1.00x)

On 32bit (where SSE2 is not known to be available):
mul_thrmat_c:                                           56.0 ( 1.00x)
mul_thrmat_sse2:                                         6.0 ( 9.40x)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2025-11-17 11:28:04 +01:00