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armv7(float): Optimize encode usecase using NE10 library

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Optimize opus encode (float only) usecase using ARM NE10
library. Mainly effects opus_fft and ctl_mdct_forward
and related functions.

This optimization can be used for ARM CPUs that have NEON
VFP unit. This patch only enables optimizations for ARMv7.

Official ARM NE10 library page available at
http://projectne10.github.io/Ne10/

To enable this optimization, use
--enable-intrinsics --with-NE10=<install_prefix>
or
--enable-intrinsics --with-NE10-libraries=<NE10_lib_dir> --with-NE10-includes=<NE10_includes_dir>

Compile time checks made during configure process to make sure
optimization option available only when compiler supports NEON
instrinsics.

Runtime checks made to make sure optimized functions only called
on appropriate hardware.

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
This commit is contained in:
Viswanath Puttagunta 2015-05-15 12:42:19 -05:00 • committed by Jean-Marc Valin
parent 0fe5143525
commit f48abe8308
31 changed files with 1492 additions and 143 deletions
Download patch file Download diff file Expand all files Collapse all files

21
celt/dump_modes/dump_modes.c
View file

@ -35,6 +35,7 @@
#include "modes.h"
#include "celt.h"
#include "rate.h"
#include "dump_modes_arch.h"
#define INT16 "%d"
#define INT32 "%d"
@ -62,6 +63,10 @@ void dump_modes(FILE *file, CELTMode **modes, int nb_modes)
fprintf(file, "\n It contains static definitions for some pre-defined modes. */\n");
fprintf(file, "#include \"modes.h\"\n");
fprintf(file, "#include \"rate.h\"\n");
fprintf(file, "\n#ifdef HAVE_ARM_NE10\n");
fprintf(file, "#define OVERRIDE_FFT 1\n");
fprintf(file, "#include \"%s\"\n", ARM_NE10_ARCH_FILE_NAME);
fprintf(file, "#endif\n");
fprintf(file, "\n");
@ -149,6 +154,9 @@ void dump_modes(FILE *file, CELTMode **modes, int nb_modes)
fprintf (file, "{" WORD16 ", " WORD16 "},%c", mode->mdct.kfft[0]->twiddles[j].r, mode->mdct.kfft[0]->twiddles[j].i,(j+3)%2==0?'\n':' ');
fprintf (file, "};\n");
#ifdef OVERRIDE_FFT
dump_mode_arch(mode);
#endif
/* FFT Bitrev tables */
for (k=0;k<=mode->mdct.maxshift;k++)
{
@ -183,6 +191,13 @@ void dump_modes(FILE *file, CELTMode **modes, int nb_modes)
fprintf (file, "}, /* factors */\n");
fprintf (file, "fft_bitrev%d, /* bitrev */\n", mode->mdct.kfft[k]->nfft);
fprintf (file, "fft_twiddles%d_%d, /* bitrev */\n", mode->Fs, mdctSize);
fprintf (file, "#ifdef OVERRIDE_FFT\n");
fprintf (file, "(arch_fft_state *)&cfg_arch_%d,\n", mode->mdct.kfft[k]->nfft);
fprintf (file, "#else\n");
fprintf (file, "NULL,\n");
fprintf(file, "#endif\n");
fprintf (file, "};\n");
fprintf(file, "#endif\n");
@ -323,8 +338,14 @@ int main(int argc, char **argv)
}
}
file = fopen(BASENAME ".h", "w");
#ifdef OVERRIDE_FFT
dump_modes_arch_init(m, nb);
#endif
dump_modes(file, m, nb);
fclose(file);
#ifdef OVERRIDE_FFT
dump_modes_arch_finalize();
#endif
for (i=0;i<nb;i++)
opus_custom_mode_destroy(m[i]);
free(m);