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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulse/timeval.h>
#include <pulsecore/random.h>
#include <pulsecore/macro.h>
#include <pulsecore/g711.h>
#include <pulsecore/core-util.h>
#include "cpu-arm.h"
#include "sample-util.h"
#include "endianmacros.h"
#if defined (__arm__) && defined (HAVE_ARMV6)
#define MOD_INC() \
" subs r0, r6, %2 \n\t" \
" addcs r0, %1 \n\t" \
" movcs r6, r0 \n\t"
static void
pa_volume_s16ne_arm (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
int32_t *ve;
/* Channels must be at least 4, and always a multiple of the original number.
* This is also the max amount we overread the volume array, which should
* have enough padding. */
channels = channels == 3 ? 6 : PA_MAX (4U, channels);
ve = volumes + channels;
__asm__ __volatile__ (
" mov r6, %1 \n\t"
" mov %3, %3, LSR #1 \n\t" /* length /= sizeof (int16_t) */
" tst %3, #1 \n\t" /* check for odd samples */
" beq 2f \n\t"
"1: \n\t"
" ldr r0, [r6], #4 \n\t" /* odd samples volumes */
" ldrh r2, [%0] \n\t"
" smulwb r0, r0, r2 \n\t"
" ssat r0, #16, r0 \n\t"
" strh r0, [%0], #2 \n\t"
MOD_INC()
"2: \n\t"
" mov %3, %3, LSR #1 \n\t"
" tst %3, #1 \n\t" /* check for odd samples */
" beq 4f \n\t"
"3: \n\t"
" ldrd r2, [r6], #8 \n\t" /* 2 samples at a time */
" ldr r0, [%0] \n\t"
" smulwt r2, r2, r0 \n\t"
" smulwb r3, r3, r0 \n\t"
" ssat r2, #16, r2 \n\t"
" ssat r3, #16, r3 \n\t"
" pkhbt r0, r3, r2, LSL #16 \n\t"
" str r0, [%0], #4 \n\t"
MOD_INC()
"4: \n\t"
" movs %3, %3, LSR #1 \n\t"
" beq 6f \n\t"
"5: \n\t"
" ldrd r2, [r6], #8 \n\t" /* 4 samples at a time */
" ldrd r4, [r6], #8 \n\t"
" ldrd r0, [%0] \n\t"
" smulwt r2, r2, r0 \n\t"
" smulwb r3, r3, r0 \n\t"
" smulwt r4, r4, r1 \n\t"
" smulwb r5, r5, r1 \n\t"
" ssat r2, #16, r2 \n\t"
" ssat r3, #16, r3 \n\t"
" ssat r4, #16, r4 \n\t"
" ssat r5, #16, r5 \n\t"
" pkhbt r0, r3, r2, LSL #16 \n\t"
" pkhbt r1, r5, r4, LSL #16 \n\t"
" strd r0, [%0], #8 \n\t"
MOD_INC()
" subs %3, %3, #1 \n\t"
" bne 5b \n\t"
"6: \n\t"
: "+r" (samples), "+r" (volumes), "+r" (ve), "+r" (length)
:
: "r6", "r5", "r4", "r3", "r2", "r1", "r0", "cc"
);
}
#undef RUN_TEST
#ifdef RUN_TEST
#define CHANNELS 2
#define SAMPLES 1023
#define TIMES 1000
#define PADDING 16
static void run_test (void) {
int16_t samples[SAMPLES];
int16_t samples_ref[SAMPLES];
int16_t samples_orig[SAMPLES];
int32_t volumes[CHANNELS + PADDING];
int i, j, padding;
pa_do_volume_func_t func;
pa_usec_t start, stop;
func = pa_get_volume_func (PA_SAMPLE_S16NE);
printf ("checking ARM %zd\n", sizeof (samples));
pa_random (samples, sizeof (samples));
memcpy (samples_ref, samples, sizeof (samples));
memcpy (samples_orig, samples, sizeof (samples));
for (i = 0; i < CHANNELS; i++)
volumes[i] = rand() >> 1;
for (padding = 0; padding < PADDING; padding++, i++)
volumes[i] = volumes[padding];
func (samples_ref, volumes, CHANNELS, sizeof (samples));
pa_volume_s16ne_arm (samples, volumes, CHANNELS, sizeof (samples));
for (i = 0; i < SAMPLES; i++) {
if (samples[i] != samples_ref[i]) {
printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
samples_orig[i], volumes[i % CHANNELS]);
}
}
start = pa_rtclock_now();
for (j = 0; j < TIMES; j++) {
memcpy (samples, samples_orig, sizeof (samples));
pa_volume_s16ne_arm (samples, volumes, CHANNELS, sizeof (samples));
}
stop = pa_rtclock_now();
pa_log_info("ARM: %llu usec.", (long long unsigned int) (stop - start));
start = pa_rtclock_now();
for (j = 0; j < TIMES; j++) {
memcpy (samples_ref, samples_orig, sizeof (samples));
func (samples_ref, volumes, CHANNELS, sizeof (samples));
}
stop = pa_rtclock_now();
pa_log_info("ref: %llu usec.", (long long unsigned int) (stop - start));
}
#endif
#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
void pa_volume_func_init_arm (pa_cpu_arm_flag_t flags) {
#if defined (__arm__) && defined (HAVE_ARMV6)
pa_log_info("Initialising ARM optimized functions.");
#ifdef RUN_TEST
run_test ();
#endif
pa_set_volume_func (PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_arm);
#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
}
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