mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
- support of dmix asm code for x86-64.
This commit is contained in:
Takashi Iwai
parent
af0c81d4af
commit
243027a824
5 changed files with 298 additions and 30 deletions
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@ -14,7 +14,7 @@ libpcm_la_SOURCES = atomic.c mask.c interval.c \
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pcm_symbols.c
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noinst_HEADERS = pcm_local.h pcm_plugin.h mask.h mask_inline.h \
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interval.h interval_inline.h plugin_ops.h ladspa.h \
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pcm_direct.h pcm_dmix_i386.h
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pcm_direct.h pcm_dmix_i386.h pcm_dmix_x86_64.h
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alsadir = $(datadir)/alsa
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@ -33,13 +33,13 @@
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typedef void (mix_areas1_t)(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step);
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step);
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typedef void (mix_areas2_t)(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step);
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step);
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struct slave_params {
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snd_pcm_format_t format;
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@ -138,22 +138,20 @@ static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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char line[255];
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int smp = 0, mmx = 0;
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/* safe settings for all i386 CPUs */
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dmix->u.dmix.mix_areas1 = mix_areas1_smp;
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/* try to determine, if we have a MMX capable CPU */
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in = fopen("/proc/cpuinfo", "r");
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if (in == NULL)
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return;
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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else if (!strncmp(line, "flags", 5)) {
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if (strstr(line, " mmx"))
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mmx = 1;
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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else if (!strncmp(line, "flags", 5)) {
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if (strstr(line, " mmx"))
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mmx = 1;
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}
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}
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fclose(in);
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}
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fclose(in);
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// printf("MMX: %i, SMP: %i\n", mmx, smp);
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if (mmx) {
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
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@ -164,12 +162,54 @@ static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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}
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#endif
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#ifdef __x86_64__
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#define ADD_AND_SATURATE
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#define MIX_AREAS1 mix_areas1
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#define MIX_AREAS2 mix_areas2
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#define LOCK_PREFIX ""
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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#define MIX_AREAS1 mix_areas1_smp
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#define MIX_AREAS2 mix_areas2_smp
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#define LOCK_PREFIX "lock ; "
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#include "pcm_dmix_x86_64.h"
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#undef MIX_AREAS1
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#undef MIX_AREAS2
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#undef LOCK_PREFIX
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static void mix_select_callbacks(snd_pcm_direct_t *dmix)
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{
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FILE *in;
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char line[255];
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int smp = 0;
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/* try to determine, if we have SMP */
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in = fopen("/proc/cpuinfo", "r");
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if (in) {
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while (!feof(in)) {
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fgets(line, sizeof(line), in);
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if (!strncmp(line, "processor", 9))
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smp++;
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}
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fclose(in);
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}
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// printf("SMP: %i\n", smp);
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dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
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dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
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}
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#endif
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#ifndef ADD_AND_SATURATE
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#warning Please, recode mix_areas1() routine to your architecture...
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static void mix_areas1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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@ -198,8 +238,8 @@ static void mix_areas1(unsigned int size,
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#warning Please, recode mix_areas2() routine to your architecture...
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static void mix_areas2(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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register signed int sample, old_sample;
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@ -31,8 +31,8 @@
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*/
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static void MIX_AREAS1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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/*
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* ESI - src
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@ -55,7 +55,7 @@ static void MIX_AREAS1(unsigned int size,
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %0\n"
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"\tcmpl $0, %0\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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@ -154,8 +154,8 @@ static void MIX_AREAS1(unsigned int size,
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*/
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static void MIX_AREAS1_MMX(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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/*
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* ESI - src
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@ -178,7 +178,7 @@ static void MIX_AREAS1_MMX(unsigned int size,
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %0\n"
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"\tcmpl $0, %0\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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@ -244,8 +244,8 @@ static void MIX_AREAS1_MMX(unsigned int size,
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*/
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static void MIX_AREAS2(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, unsigned int dst_step,
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unsigned int src_step, unsigned int sum_step)
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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/*
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* ESI - src
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@ -268,7 +268,7 @@ static void MIX_AREAS2(unsigned int size,
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/*
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* while (size-- > 0) {
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*/
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"\tcmp $0, %0\n"
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"\tcmpl $0, %0\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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228
src/pcm/pcm_dmix_x86_64.h
Normal file
228
src/pcm/pcm_dmix_x86_64.h
Normal file
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@ -0,0 +1,228 @@
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/**
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* \file pcm/pcm_dmix_x86_64.h
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* \ingroup PCM_Plugins
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* \brief PCM Direct Stream Mixing (dmix) Plugin Interface - X86-64 assembler code
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* \author Takashi Iwai <tiwai@suse.de>
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* \date 2003
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*/
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/*
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* PCM - Direct Stream Mixing
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* Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
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* Takashi Iwai <tiwai@suse.de>
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*
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*
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* This library 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
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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* MMX optimized
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*/
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static void MIX_AREAS1(unsigned int size,
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volatile signed short *dst, signed short *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - temporary
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*/
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__asm__ __volatile__ (
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"\n"
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/*
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* initialization, load ESI, EDI, EBX registers
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*/
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"\tmovq %1, %%rdi\n"
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"\tmovq %2, %%rsi\n"
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"\tmovq %3, %%rbx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmpl $0, %0\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* sum_sample = *sum;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= sum_sample;
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* xadd(*sum, sample);
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*/
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"\tmovw $0, %%ax\n"
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"\tmovw $1, %%cx\n"
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"\tmovl (%%rbx), %%edx\n"
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"\t" LOCK_PREFIX "cmpxchgw %%cx, (%%rdi)\n"
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"\tmovswl (%%rsi), %%ecx\n"
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"\tjnz 2f\n"
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"\tsubl %%edx, %%ecx\n"
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"2:"
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"\t" LOCK_PREFIX "addl %%ecx, (%%rbx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%rbx), %%ecx\n"
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"\tmovd %%ecx, %%mm0\n"
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"\tpackssdw %%mm1, %%mm0\n"
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"\tmovd %%mm0, %%eax\n"
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"\tmovw %%ax, (%%rdi)\n"
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"\tcmpl %%ecx, (%%rbx)\n"
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"\tjnz 3b\n"
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/*
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* while (size-- > 0)
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*/
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"\tadd %4, %%rdi\n"
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"\tadd %5, %%rsi\n"
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"\tadd %6, %%rbx\n"
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"\tdecl %0\n"
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"\tjnz 1b\n"
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"\tjmp 6f\n"
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"6:"
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"\temms\n"
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: /* no output regs */
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: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
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: "rsi", "rdi", "edx", "ecx", "rbx", "eax"
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);
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}
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/*
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* 32-bit version (24-bit resolution)
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*/
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static void MIX_AREAS2(unsigned int size,
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volatile signed int *dst, signed int *src,
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volatile signed int *sum, size_t dst_step,
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size_t src_step, size_t sum_step)
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{
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/*
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* ESI - src
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* EDI - dst
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* EBX - sum
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* ECX - old sample
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* EAX - sample / temporary
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* EDX - temporary
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*/
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__asm__ __volatile__ (
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"\n"
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/*
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* initialization, load ESI, EDI, EBX registers
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*/
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"\tmovq %1, %%rdi\n"
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"\tmovq %2, %%rsi\n"
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"\tmovq %3, %%rbx\n"
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/*
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* while (size-- > 0) {
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*/
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"\tcmpl $0, %0\n"
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"jz 6f\n"
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"\t.p2align 4,,15\n"
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"1:"
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/*
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* sample = *src;
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* sum_sample = *sum;
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* if (cmpxchg(*dst, 0, 1) == 0)
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* sample -= sum_sample;
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* xadd(*sum, sample);
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*/
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"\tmovl $0, %%eax\n"
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"\tmovl $1, %%ecx\n"
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"\tmovl (%%rbx), %%edx\n"
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"\t" LOCK_PREFIX "cmpxchgl %%ecx, (%%rdi)\n"
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"\tjnz 2f\n"
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"\tmovl (%%rsi), %%ecx\n"
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/* sample >>= 8 */
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"\tsarl $8, %%ecx\n"
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"\tsubl %%edx, %%ecx\n"
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"\tjmp 21f\n"
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"2:"
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"\tmovl (%%rsi), %%ecx\n"
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/* sample >>= 8 */
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"\tsarl $8, %%ecx\n"
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"21:"
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"\t" LOCK_PREFIX "addl %%ecx, (%%rbx)\n"
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/*
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* do {
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* sample = old_sample = *sum;
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* saturate(v);
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* *dst = sample;
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* } while (v != *sum);
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*/
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"3:"
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"\tmovl (%%rbx), %%ecx\n"
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/*
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* if (sample > 0x7fff00)
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*/
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"\tmovl $0x7fffff, %%eax\n"
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"\tcmpl %%eax, %%ecx\n"
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"\tjg 4f\n"
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/*
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* if (sample < -0x800000)
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*/
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"\tmovl $-0x800000, %%eax\n"
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"\tcmpl %%eax, %%ecx\n"
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"\tjl 4f\n"
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"\tmovl %%ecx, %%eax\n"
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"4:"
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/*
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* sample <<= 8;
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*/
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"\tsall $8, %%eax\n"
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"\tmovl %%eax, (%%rdi)\n"
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"\tcmpl %%ecx, (%%rbx)\n"
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"\tjnz 3b\n"
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/*
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* while (size-- > 0)
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*/
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"\tadd %4, %%rdi\n"
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"\tadd %5, %%rsi\n"
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"\tadd %6, %%rbx\n"
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"\tdecl %0\n"
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"\tjnz 1b\n"
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// "\tjmp 6f\n"
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"6:"
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: /* no output regs */
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: "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
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: "rsi", "rdi", "edx", "ecx", "rbx", "eax"
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);
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}
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