mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-12-22 08:56:57 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

- support of dmix asm code for x86-64.

Browse source
This commit is contained in:
Takashi Iwai 2003-09-17 17:09:45 +00:00
parent af0c81d4af
commit 243027a824
5 changed files with 298 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

72
src/pcm/pcm_dmix.c
View file

@ -138,22 +138,20 @@ static void mix_select_callbacks(snd_pcm_direct_t *dmix)
char line[255];
int smp = 0, mmx = 0;
/* safe settings for all i386 CPUs */
dmix->u.dmix.mix_areas1 = mix_areas1_smp;
/* try to determine, if we have a MMX capable CPU */
in = fopen("/proc/cpuinfo", "r");
if (in == NULL)
return;
while (!feof(in)) {
fgets(line, sizeof(line), in);
if (!strncmp(line, "processor", 9))
smp++;
else if (!strncmp(line, "flags", 5)) {
if (strstr(line, " mmx"))
mmx = 1;
if (in) {
while (!feof(in)) {
fgets(line, sizeof(line), in);
if (!strncmp(line, "processor", 9))
smp++;
else if (!strncmp(line, "flags", 5)) {
if (strstr(line, " mmx"))
mmx = 1;
}
}
fclose(in);
}
fclose(in);
// printf("MMX: %i, SMP: %i\n", mmx, smp);
if (mmx) {
dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
@ -164,12 +162,54 @@ static void mix_select_callbacks(snd_pcm_direct_t *dmix)
}
#endif
#ifdef __x86_64__
#define ADD_AND_SATURATE
#define MIX_AREAS1 mix_areas1
#define MIX_AREAS2 mix_areas2
#define LOCK_PREFIX ""
#include "pcm_dmix_x86_64.h"
#undef MIX_AREAS1
#undef MIX_AREAS2
#undef LOCK_PREFIX
#define MIX_AREAS1 mix_areas1_smp
#define MIX_AREAS2 mix_areas2_smp
#define LOCK_PREFIX "lock ; "
#include "pcm_dmix_x86_64.h"
#undef MIX_AREAS1
#undef MIX_AREAS2
#undef LOCK_PREFIX
static void mix_select_callbacks(snd_pcm_direct_t *dmix)
{
FILE *in;
char line[255];
int smp = 0;
/* try to determine, if we have SMP */
in = fopen("/proc/cpuinfo", "r");
if (in) {
while (!feof(in)) {
fgets(line, sizeof(line), in);
if (!strncmp(line, "processor", 9))
smp++;
}
fclose(in);
}
// printf("SMP: %i\n", smp);
dmix->u.dmix.mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
dmix->u.dmix.mix_areas2 = smp > 1 ? mix_areas2_smp : mix_areas2;
}
#endif
#ifndef ADD_AND_SATURATE
#warning Please, recode mix_areas1() routine to your architecture...
static void mix_areas1(unsigned int size,
volatile signed short *dst, signed short *src,
volatile signed int *sum, unsigned int dst_step,
unsigned int src_step, unsigned int sum_step)
volatile signed int *sum, size_t dst_step,
size_t src_step, size_t sum_step)
{
register signed int sample, old_sample;
@ -198,8 +238,8 @@ static void mix_areas1(unsigned int size,
#warning Please, recode mix_areas2() routine to your architecture...
static void mix_areas2(unsigned int size,
volatile signed int *dst, signed int *src,
volatile signed int *sum, unsigned int dst_step,
unsigned int src_step, unsigned int sum_step)
volatile signed int *sum, size_t dst_step,
size_t src_step, size_t sum_step)
{
register signed int sample, old_sample;