mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-14 06:59:53 -05:00
0b2457432a
This makes the volume tests run in two loops and print the minimum, maximum and standard deviation of readings from the inner loop. This makes it easier to reason out performance drops (i.e. algorithmic problems vs. other system issues such as processor contention).
346 lines
15 KiB
C
346 lines
15 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/timeval.h>
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#include <pulse/rtclock.h>
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#include <pulsecore/random.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/g711.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/endianmacros.h>
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#include "cpu-x86.h"
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#include "sample-util.h"
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#if defined (__i386__) || defined (__amd64__)
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#define VOLUME_32x16(s,v) /* .. | vh | vl | */ \
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" pxor %%xmm4, %%xmm4 \n\t" /* .. | 0 | 0 | */ \
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" punpcklwd %%xmm4, "#s" \n\t" /* .. | 0 | p0 | */ \
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" pcmpgtw "#s", %%xmm4 \n\t" /* .. | 0 | s(p0) | */ \
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" pand "#v", %%xmm4 \n\t" /* .. | 0 | (vl) | */ \
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" movdqa "#s", %%xmm5 \n\t" \
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" pmulhuw "#v", "#s" \n\t" /* .. | 0 | vl*p0 | */ \
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" psubd %%xmm4, "#s" \n\t" /* .. | 0 | vl*p0 | + sign correct */ \
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" psrld $16, "#v" \n\t" /* .. | 0 | vh | */ \
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" pmaddwd %%xmm5, "#v" \n\t" /* .. | p0 * vh | */ \
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" paddd "#s", "#v" \n\t" /* .. | p0 * v0 | */ \
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" packssdw "#v", "#v" \n\t" /* .. | p1*v1 | p0*v0 | */
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#define MOD_ADD(a,b) \
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" add "#a", %3 \n\t" /* channel += inc */ \
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" mov %3, %4 \n\t" \
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" sub "#b", %4 \n\t" /* tmp = channel - channels */ \
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" cmovae %4, %3 \n\t" /* if (tmp >= 0) channel = tmp */
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/* swap 16 bits */
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#define SWAP_16(s) \
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" movdqa "#s", %%xmm4 \n\t" /* .. | h l | */ \
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" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
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" psllw $8, "#s" \n\t" /* .. | l 0 | */ \
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" por %%xmm4, "#s" \n\t" /* .. | l h | */
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/* swap 2 registers 16 bits for better pairing */
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#define SWAP_16_2(s1,s2) \
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" movdqa "#s1", %%xmm4 \n\t" /* .. | h l | */ \
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" movdqa "#s2", %%xmm5 \n\t" \
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" psrlw $8, %%xmm4 \n\t" /* .. | 0 h | */ \
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" psrlw $8, %%xmm5 \n\t" \
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" psllw $8, "#s1" \n\t" /* .. | l 0 | */ \
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" psllw $8, "#s2" \n\t" \
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" por %%xmm4, "#s1" \n\t" /* .. | l h | */ \
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" por %%xmm5, "#s2" \n\t"
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static int channel_overread_table[8] = {8,8,8,12,8,10,12,14};
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static void pa_volume_s16ne_sse2(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
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pa_reg_x86 channel, temp;
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/* Channels must be at least 8 and always a multiple of the original number.
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* This is also the max amount we overread the volume array, which should
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* have enough padding. */
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if (channels < 8)
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channels = channel_overread_table[channels];
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__asm__ __volatile__ (
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" xor %3, %3 \n\t"
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" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 2f \n\t"
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" movd (%1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */
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" movw (%0), %w4 \n\t" /* .. | p0 | */
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" movd %4, %%xmm1 \n\t"
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, %4 \n\t" /* .. | p0*v0 | */
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" movw %w4, (%0) \n\t"
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" add $2, %0 \n\t"
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MOD_ADD ($1, %5)
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"2: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
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" test $1, %2 \n\t"
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" je 4f \n\t"
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"3: \n\t" /* do samples in groups of 2 */
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" movq (%1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" add $4, %0 \n\t"
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MOD_ADD ($2, %5)
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"4: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
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" test $1, %2 \n\t"
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" je 6f \n\t"
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/* FIXME, we can do aligned access of the volume values if we can guarantee
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* that the array is 16 bytes aligned, we probably have to do the odd values
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* after this then. */
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"5: \n\t" /* do samples in groups of 4 */
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" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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"6: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
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" cmp $0, %2 \n\t"
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" je 8f \n\t"
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"7: \n\t" /* do samples in groups of 8 */
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" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
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VOLUME_32x16 (%%xmm1, %%xmm0)
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VOLUME_32x16 (%%xmm3, %%xmm2)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
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" add $16, %0 \n\t"
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MOD_ADD ($8, %5)
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" dec %2 \n\t"
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" jne 7b \n\t"
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"8: \n\t"
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: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
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: "rm" ((pa_reg_x86)channels)
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: "cc"
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);
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}
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static void pa_volume_s16re_sse2(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
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pa_reg_x86 channel, temp;
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/* Channels must be at least 8 and always a multiple of the original number.
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* This is also the max amount we overread the volume array, which should
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* have enough padding. */
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if (channels < 8)
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channels = channel_overread_table[channels];
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__asm__ __volatile__ (
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" xor %3, %3 \n\t"
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" sar $1, %2 \n\t" /* length /= sizeof (int16_t) */
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" test $1, %2 \n\t" /* check for odd samples */
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" je 2f \n\t"
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" movd (%1, %3, 4), %%xmm0 \n\t" /* | v0h | v0l | */
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" movw (%0), %w4 \n\t" /* .. | p0 | */
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" rorw $8, %w4 \n\t"
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" movd %4, %%xmm1 \n\t"
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VOLUME_32x16 (%%xmm1, %%xmm0)
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" movd %%xmm0, %4 \n\t" /* .. | p0*v0 | */
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" rorw $8, %w4 \n\t"
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" movw %w4, (%0) \n\t"
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" add $2, %0 \n\t"
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MOD_ADD ($1, %5)
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"2: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
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" test $1, %2 \n\t"
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" je 4f \n\t"
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"3: \n\t" /* do samples in groups of 2 */
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" movq (%1, %3, 4), %%xmm0 \n\t" /* | v1h | v1l | v0h | v0l | */
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" movd (%0), %%xmm1 \n\t" /* .. | p1 | p0 | */
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SWAP_16 (%%xmm1)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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SWAP_16 (%%xmm0)
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" movd %%xmm0, (%0) \n\t" /* .. | p1*v1 | p0*v0 | */
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" add $4, %0 \n\t"
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MOD_ADD ($2, %5)
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"4: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
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" test $1, %2 \n\t"
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" je 6f \n\t"
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/* FIXME, we can do aligned access of the volume values if we can guarantee
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* that the array is 16 bytes aligned, we probably have to do the odd values
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* after this then. */
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"5: \n\t" /* do samples in groups of 4 */
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" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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SWAP_16 (%%xmm1)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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SWAP_16 (%%xmm0)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" add $8, %0 \n\t"
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MOD_ADD ($4, %5)
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"6: \n\t"
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" sar $1, %2 \n\t" /* prepare for processing 8 samples at a time */
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" cmp $0, %2 \n\t"
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" je 8f \n\t"
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"7: \n\t" /* do samples in groups of 8 */
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" movdqu (%1, %3, 4), %%xmm0 \n\t" /* | v3h | v3l .. v0h | v0l | */
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" movdqu 16(%1, %3, 4), %%xmm2 \n\t" /* | v7h | v7l .. v4h | v4l | */
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" movq (%0), %%xmm1 \n\t" /* .. | p3 .. p0 | */
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" movq 8(%0), %%xmm3 \n\t" /* .. | p7 .. p4 | */
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SWAP_16_2 (%%xmm1, %%xmm3)
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VOLUME_32x16 (%%xmm1, %%xmm0)
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VOLUME_32x16 (%%xmm3, %%xmm2)
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SWAP_16_2 (%%xmm0, %%xmm2)
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" movq %%xmm0, (%0) \n\t" /* .. | p3*v3 .. p0*v0 | */
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" movq %%xmm2, 8(%0) \n\t" /* .. | p7*v7 .. p4*v4 | */
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" add $16, %0 \n\t"
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MOD_ADD ($8, %5)
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" dec %2 \n\t"
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" jne 7b \n\t"
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"8: \n\t"
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: "+r" (samples), "+r" (volumes), "+r" (length), "=D" (channel), "=&r" (temp)
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: "rm" ((pa_reg_x86)channels)
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: "cc"
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);
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}
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#undef RUN_TEST
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#ifdef RUN_TEST
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#define CHANNELS 2
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#define SAMPLES 1022
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#define TIMES 1000
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#define TIMES2 100
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#define PADDING 16
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static void run_test(void) {
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int16_t samples[SAMPLES];
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int16_t samples_ref[SAMPLES];
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int16_t samples_orig[SAMPLES];
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int32_t volumes[CHANNELS + PADDING];
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int i, j, padding;
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pa_do_volume_func_t func;
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pa_usec_t start, stop;
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int k;
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pa_usec_t min = INT_MAX, max = 0;
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double s1 = 0, s2 = 0;
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func = pa_get_volume_func(PA_SAMPLE_S16NE);
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printf("checking SSE2 %zd\n", sizeof(samples));
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pa_random(samples, sizeof(samples));
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memcpy(samples_ref, samples, sizeof(samples));
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memcpy(samples_orig, samples, sizeof(samples));
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for (i = 0; i < CHANNELS; i++)
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volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
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for (padding = 0; padding < PADDING; padding++, i++)
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volumes[i] = volumes[padding];
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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pa_volume_s16ne_sse2(samples, volumes, CHANNELS, sizeof(samples));
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for (i = 0; i < SAMPLES; i++) {
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if (samples[i] != samples_ref[i]) {
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printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
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samples_orig[i], volumes[i % CHANNELS]);
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}
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}
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples, samples_orig, sizeof(samples));
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pa_volume_s16ne_sse2(samples, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("SSE: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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min = INT_MAX; max = 0;
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s1 = s2 = 0;
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples_ref, samples_orig, sizeof(samples));
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("ref: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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pa_assert_se(memcmp(samples_ref, samples, sizeof(samples)) == 0);
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}
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#endif
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#endif /* defined (__i386__) || defined (__amd64__) */
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void pa_volume_func_init_sse(pa_cpu_x86_flag_t flags) {
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#if defined (__i386__) || defined (__amd64__)
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#ifdef RUN_TEST
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run_test();
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#endif
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if (flags & PA_CPU_X86_SSE2) {
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pa_log_info("Initialising SSE2 optimized functions.");
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pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_sse2);
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pa_set_volume_func(PA_SAMPLE_S16RE, (pa_do_volume_func_t) pa_volume_s16re_sse2);
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}
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#endif /* defined (__i386__) || defined (__amd64__) */
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}
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