#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 <pulsecore/endianmacros.h>
#include "cpu-arm.h"
#include "sample-util.h"
-#include "endianmacros.h"
-#if defined (__arm__)
+#if defined (__arm__) && defined (HAVE_ARMV6)
#define MOD_INC() \
" subs r0, r6, %2 \n\t" \
+ " itt cs \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;
+static pa_do_volume_func_t _volume_ref;
- channels = PA_MAX (4U, channels);
- ve = volumes + channels;
+static void pa_volume_s16ne_arm(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
+ /* 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. */
+ const int32_t *ve = volumes + (channels == 3 ? 6 : PA_MAX (4U, channels));
+ unsigned rem = PA_ALIGN((size_t) samples) - (size_t) samples;
+
+ /* Make sure we're word-aligned, else performance _really_ sucks */
+ if (rem) {
+ _volume_ref(samples, volumes, channels, rem < length ? rem : length);
+
+ if (rem < length) {
+ length -= rem;
+ samples += rem / sizeof(*samples);
+ } else
+ return; /* we're done */
+ }
__asm__ __volatile__ (
- " mov r6, %1 \n\t"
+ " mov r6, %4 \n\t" /* r6 = volumes + rem */
" mov %3, %3, LSR #1 \n\t" /* length /= sizeof (int16_t) */
- " tst %3, #1 \n\t" /* check for odd samples */
- " beq 2f \n\t"
+
+ " cmp %3, #4 \n\t" /* check for 4+ samples */
+ " blt 2f \n\t"
+
+ /* See final case for how the multiplication works */
"1: \n\t"
- " ldr r0, [r6], #4 \n\t" /* odd samples volumes */
- " ldrh r2, [%0] \n\t"
+ " ldrd r2, [r6], #8 \n\t" /* 4 samples at a time */
+ " ldrd r4, [r6], #8 \n\t"
+ " ldrd r0, [%0] \n\t"
- " smulwb r0, r0, r2 \n\t"
- " ssat r0, #16, r0 \n\t"
+#ifdef WORDS_BIGENDIAN
+ " smulwt r2, r2, r0 \n\t"
+ " smulwb r3, r3, r0 \n\t"
+ " smulwt r4, r4, r1 \n\t"
+ " smulwb r5, r5, r1 \n\t"
+#else
+ " smulwb r2, r2, r0 \n\t"
+ " smulwt r3, r3, r0 \n\t"
+ " smulwb r4, r4, r1 \n\t"
+ " smulwt r5, r5, r1 \n\t"
+#endif
- " strh r0, [%0], #2 \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"
+
+#ifdef WORDS_BIGENDIAN
+ " pkhbt r0, r3, r2, LSL #16 \n\t"
+ " pkhbt r1, r5, r4, LSL #16 \n\t"
+#else
+ " pkhbt r0, r2, r3, LSL #16 \n\t"
+ " pkhbt r1, r4, r5, LSL #16 \n\t"
+#endif
+ " strd r0, [%0], #8 \n\t"
MOD_INC()
+ " subs %3, %3, #4 \n\t"
+ " cmp %3, #4 \n\t"
+ " bge 1b \n\t"
+
"2: \n\t"
- " mov %3, %3, LSR #1 \n\t"
- " tst %3, #1 \n\t" /* check for odd samples */
- " beq 4f \n\t"
+ " cmp %3, #2 \n\t"
+ " blt 3f \n\t"
- "3: \n\t"
- " ldrd r2, [r6], #8 \n\t" /* 2 samples at a time */
+ " ldrd r2, [r6], #8 \n\t" /* 2 samples at a time */
" ldr r0, [%0] \n\t"
+#ifdef WORDS_BIGENDIAN
" smulwt r2, r2, r0 \n\t"
" smulwb r3, r3, r0 \n\t"
+#else
+ " smulwb r2, r2, r0 \n\t"
+ " smulwt r3, r3, r0 \n\t"
+#endif
" ssat r2, #16, r2 \n\t"
" ssat r3, #16, r3 \n\t"
+#ifdef WORDS_BIGENDIAN
" pkhbt r0, r3, r2, LSL #16 \n\t"
+#else
+ " pkhbt r0, r2, r3, LSL #16 \n\t"
+#endif
" str r0, [%0], #4 \n\t"
MOD_INC()
- "4: \n\t"
- " movs %3, %3, LSR #1 \n\t"
- " beq 6f \n\t"
+ " subs %3, %3, #2 \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"
+ "3: \n\t" /* check for odd # of samples */
+ " cmp %3, #1 \n\t"
+ " bne 4f \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"
+ " ldr r0, [r6], #4 \n\t" /* r0 = volume */
+ " ldrh r2, [%0] \n\t" /* r2 = sample */
- " 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"
+ " smulwb r0, r0, r2 \n\t" /* r0 = (r0 * r2) >> 16 */
+ " ssat r0, #16, r0 \n\t" /* r0 = PA_CLAMP(r0, 0x7FFF) */
- MOD_INC()
+ " strh r0, [%0], #2 \n\t" /* sample = r0 */
- " subs %3, %3, #1 \n\t"
- " bne 5b \n\t"
- "6: \n\t"
+ "4: \n\t"
: "+r" (samples), "+r" (volumes), "+r" (ve), "+r" (length)
- :
+ : "r" (volumes + ((rem / sizeof(*samples)) % channels))
: "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]);
- }
- }
+#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
- 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));
+void pa_volume_func_init_arm(pa_cpu_arm_flag_t flags) {
+#if defined (__arm__) && defined (HAVE_ARMV6)
+ pa_log_info("Initialising ARM optimized volume functions.");
- 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__) */
-
-
-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
+ if (!_volume_ref)
+ _volume_ref = pa_get_volume_func(PA_SAMPLE_S16NE);
- pa_set_volume_func (PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_arm);
-#endif /* defined (__arm__) */
+ pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_arm);
+#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
}