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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 <pulse/rtclock.h>
#include <pulsecore/random.h>
#include <pulsecore/macro.h>
#include <pulsecore/g711.h>
#include <pulsecore/core-util.h>
#include <pulsecore/endianmacros.h>
#include "cpu-x86.h"
#include "sample-util.h"
#if defined (__i386__) || defined (__amd64__)
#define VOLUME_32x16(s,v) /* .. | vh | vl | */ \
" pxor %%xmm4, %%xmm4 \n\t" /* .. | 0 | 0 | */ \
" punpcklwd %%xmm4, "#s" \n\t" /* .. | 0 | p0 | */ \
" pcmpgtw "#s", %%xmm4 \n\t" /* .. | 0 | s(p0) | */ \
" pand "#v", %%xmm4 \n\t" /* .. | 0 | (vl) | */ \
" movdqa "#s", %%xmm5 \n\t" \
" pmulhuw "#v", "#s" \n\t" /* .. | 0 | vl*p0 | */ \
" psubd %%xmm4, "#s" \n\t" /* .. | 0 | vl*p0 | + sign correct */ \
" psrld $16, "#v" \n\t" /* .. | 0 | vh | */ \
" pmaddwd %%xmm5, "#v" \n\t" /* .. | p0 * vh | */ \
" paddd "#s", "#v" \n\t" /* .. | p0 * v0 | */ \
" packssdw "#v", "#v" \n\t" /* .. | p1*v1 | p0*v0 | */
#define MOD_ADD(a,b) \
" add "#a", %3 \n\t" /* channel += inc */ \
" mov %3, %4 \n\t" \
" sub "#b", %4 \n\t" /* tmp = channel - channels */ \
" cmovae %4, %3 \n\t" /* if (tmp >= 0) channel = tmp */
/* swap 16 bits */
#define SWAP_16(s) \
" movdqa "#s", %%xmm4 \n\t" /* .. | h l | */ \
" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
" psllw $8, "#s" \n\t" /* .. | l 0 | */ \
" por %%xmm4, "#s" \n\t" /* .. | l h | */
/* swap 2 registers 16 bits for better pairing */
#define SWAP_16_2(s1,s2) \
" movdqa "#s1", %%xmm4 \n\t" /* .. | h l | */ \
" movdqa "#s2", %%xmm5 \n\t" \
" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
" psrlw $8, %%xmm5 \n\t" \
" psllw $8, "#s1" \n\t" /* .. | l 0 | */ \
" psllw $8, "#s2" \n\t" \
" por %%xmm4, "#s1" \n\t" /* .. | l h | */ \
" por %%xmm5, "#s2" \n\t"
static int channel_overread_table[8] = {8,8,8,12,8,10,12,14};
static void pa_volume_s16ne_sse2(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
pa_reg_x86 channel, temp;
/* Channels must be at least 8 and always a multiple of the original number.
* This is also the max amount we overread the volume array, which should
* have enough padding. */
if (channels < 8)
channels = channel_overread_table[channels];
__asm__ __volatile__ (
" xor %3, %3 \n\t"
" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
" test $1, %2 \n\t" /* check for odd samples */
" je 2f \n\t"
" movd (%1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */
" movw (%0), %w4 \n\t" /* .. | p0 | */
" movd %4, %%xmm1 \n\t"
VOLUME_32x16 (%%xmm1, %%xmm0)
" movd %%xmm0, %4 \n\t" /* .. | p0*v0 | */
" movw %w4, (%0) \n\t"
" add $2, %0 \n\t"
MOD_ADD ($1, %5)
"2: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
" test $1, %2 \n\t"
" je 4f \n\t"
"3: \n\t" /* do samples in groups of 2 */
" movq (%1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
VOLUME_32x16 (%%xmm1, %%xmm0)
" movd %%xmm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
" add $4, %0 \n\t"
MOD_ADD ($2, %5)
"4: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
" test $1, %2 \n\t"
" je 6f \n\t"
/* FIXME, we can do aligned access of the volume values if we can guarantee
* that the array is 16 bytes aligned, we probably have to do the odd values
* after this then. */
"5: \n\t" /* do samples in groups of 4 */
" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
VOLUME_32x16 (%%xmm1, %%xmm0)
" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
" add $8, %0 \n\t"
MOD_ADD ($4, %5)
"6: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
" cmp $0, %2 \n\t"
" je 8f \n\t"
"7: \n\t" /* do samples in groups of 8 */
" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
" movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
VOLUME_32x16 (%%xmm1, %%xmm0)
VOLUME_32x16 (%%xmm3, %%xmm2)
" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
" add $16, %0 \n\t"
MOD_ADD ($8, %5)
" dec %2 \n\t"
" jne 7b \n\t"
"8: \n\t"
: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
: "rm" ((pa_reg_x86)channels)
: "cc"
);
}
static void pa_volume_s16re_sse2(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
pa_reg_x86 channel, temp;
/* Channels must be at least 8 and always a multiple of the original number.
* This is also the max amount we overread the volume array, which should
* have enough padding. */
if (channels < 8)
channels = channel_overread_table[channels];
__asm__ __volatile__ (
" xor %3, %3 \n\t"
" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
" test $1, %2 \n\t" /* check for odd samples */
" je 2f \n\t"
" movd (%1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */
" movw (%0), %w4 \n\t" /* .. | p0 | */
" rorw $8, %w4 \n\t"
" movd %4, %%xmm1 \n\t"
VOLUME_32x16 (%%xmm1, %%xmm0)
" movd %%xmm0, %4 \n\t" /* .. | p0*v0 | */
" rorw $8, %w4 \n\t"
" movw %w4, (%0) \n\t"
" add $2, %0 \n\t"
MOD_ADD ($1, %5)
"2: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
" test $1, %2 \n\t"
" je 4f \n\t"
"3: \n\t" /* do samples in groups of 2 */
" movq (%1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
SWAP_16 (%%xmm1)
VOLUME_32x16 (%%xmm1, %%xmm0)
SWAP_16 (%%xmm0)
" movd %%xmm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
" add $4, %0 \n\t"
MOD_ADD ($2, %5)
"4: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
" test $1, %2 \n\t"
" je 6f \n\t"
/* FIXME, we can do aligned access of the volume values if we can guarantee
* that the array is 16 bytes aligned, we probably have to do the odd values
* after this then. */
"5: \n\t" /* do samples in groups of 4 */
" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
SWAP_16 (%%xmm1)
VOLUME_32x16 (%%xmm1, %%xmm0)
SWAP_16 (%%xmm0)
" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
" add $8, %0 \n\t"
MOD_ADD ($4, %5)
"6: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
" cmp $0, %2 \n\t"
" je 8f \n\t"
"7: \n\t" /* do samples in groups of 8 */
" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
" movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
SWAP_16_2 (%%xmm1, %%xmm3)
VOLUME_32x16 (%%xmm1, %%xmm0)
VOLUME_32x16 (%%xmm3, %%xmm2)
SWAP_16_2 (%%xmm0, %%xmm2)
" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
" add $16, %0 \n\t"
MOD_ADD ($8, %5)
" dec %2 \n\t"
" jne 7b \n\t"
"8: \n\t"
: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
: "rm" ((pa_reg_x86)channels)
: "cc"
);
}
#undef RUN_TEST
#ifdef RUN_TEST
#define CHANNELS 2
#define SAMPLES 1022
#define TIMES 1000
#define TIMES2 100
#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;
int k;
pa_usec_t min = INT_MAX, max = 0;
double s1 = 0, s2 = 0;
func = pa_get_volume_func(PA_SAMPLE_S16NE);
printf("checking SSE2 %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] = PA_CLAMP_VOLUME(rand() >> 1);
for (padding = 0; padding < PADDING; padding++, i++)
volumes[i] = volumes[padding];
func(samples_ref, volumes, CHANNELS, sizeof(samples));
pa_volume_s16ne_sse2(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]);
}
}
for (k = 0; k < TIMES2; k++) {
start = pa_rtclock_now();
for (j = 0; j < TIMES; j++) {
memcpy(samples, samples_orig, sizeof(samples));
pa_volume_s16ne_sse2(samples, volumes, CHANNELS, sizeof(samples));
}
stop = pa_rtclock_now();
if (min > (stop - start)) min = stop - start;
if (max < (stop - start)) max = stop - start;
s1 += stop - start;
s2 += (stop - start) * (stop - start);
}
pa_log_info("SSE: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
min = INT_MAX; max = 0;
s1 = s2 = 0;
for (k = 0; k < TIMES2; k++) {
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();
if (min > (stop - start)) min = stop - start;
if (max < (stop - start)) max = stop - start;
s1 += stop - start;
s2 += (stop - start) * (stop - start);
}
pa_log_info("ref: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
pa_assert_se(memcmp(samples_ref, samples, sizeof(samples)) == 0);
}
#endif
#endif /* defined (__i386__) || defined (__amd64__) */
void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags) {
#if defined (__i386__) || defined (__amd64__)
#ifdef RUN_TEST
run_test();
#endif
if (flags & PA_CPU_X86_SSE2) {
pa_log_info("Initialising SSE2 optimized functions.");
pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_sse2);
pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_sse2);
}
#endif /* defined (__i386__) || defined (__amd64__) */
}
|
