--- /dev/null
+/***
+ 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__)
+
+#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 = MAX (4, 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;
+ struct timeval 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]);
+ }
+ }
+
+ pa_gettimeofday(&start);
+ for (j = 0; j < TIMES; j++) {
+ memcpy (samples, samples_orig, sizeof (samples));
+ pa_volume_s16ne_arm (samples, volumes, CHANNELS, sizeof (samples));
+ }
+ pa_gettimeofday(&stop);
+ pa_log_info("ARM: %llu usec.", (long long unsigned int)pa_timeval_diff (&stop, &start));
+
+ pa_gettimeofday(&start);
+ for (j = 0; j < TIMES; j++) {
+ memcpy (samples_ref, samples_orig, sizeof (samples));
+ func (samples_ref, volumes, CHANNELS, sizeof (samples));
+ }
+ pa_gettimeofday(&stop);
+ pa_log_info("ref: %llu usec.", (long long unsigned int)pa_timeval_diff (&stop, &start));
+}
+#endif
+
+#endif /* defined (__arm__) */
+
+
+void pa_volume_func_init_arm (pa_cpu_arm_flag_t flags) {
+#if defined (__arm__)
+ 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__) */
+}