[FFmpeg-devel] [PATCH v4] mdct15: add assembly optimizations for the 15-point FFT

[Michael Niedermayer]

On Fri, Jun 23, 2017 at 02:51:37AM +0100, Rostislav Pehlivanov wrote:
> c:    1802 decicycles in fft15,16774635 runs,   2581 skips
> avx:   865 decicycles in fft15,16776378 runs,    838 skips
> 
> Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>
> ---
>  libavcodec/mdct15.c          | 182 +++++++++++++++++++++----------------------
>  libavcodec/mdct15.h          |  26 +++----
>  libavcodec/x86/Makefile      |   2 +
>  libavcodec/x86/mdct15.asm    | 137 ++++++++++++++++++++++++++++++++
>  libavcodec/x86/mdct15_init.c |  95 ++++++++++++++++++++++
>  5 files changed, 333 insertions(+), 109 deletions(-)
>  create mode 100644 libavcodec/x86/mdct15.asm
>  create mode 100644 libavcodec/x86/mdct15_init.c


seems to fail to build here:

libavcodec/x86/mdct15.asm:116: error: invalid combination of opcode and operands
libavcodec/x86/mdct15.asm:117: error: invalid combination of opcode and operands
libavcodec/x86/mdct15.asm:118: error: invalid combination of opcode and operands
make: *** [libavcodec/x86/mdct15.o] Error 1

X86ASM=nasm

nasm -v
NASM version 2.10.09 compiled on Dec 29 2013

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The greatest way to live with honor in this world is to be what we pretend
to be. -- Socrates
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