#define ADD_AND_SATURATE
-/*
- * for plain i386
- */
-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)
-{
- /*
- * ESI - src
- * EDI - dst
- * EBX - sum
- * ECX - old sample
- * EAX - sample / temporary
- * EDX - size
- */
- __asm__ __volatile__ (
- "\n"
-
- /*
- * initialization, load EDX, ESI, EDI, EBX registers
- */
- "\tmovl %0, %%edx\n"
- "\tmovl %1, %%edi\n"
- "\tmovl %2, %%esi\n"
- "\tmovl %3, %%ebx\n"
-
- /*
- * while (size-- > 0) {
- */
- "\tcmp $0, %%edx\n"
- "jz 6f\n"
-
- "\t.p2align 4,,15\n"
-
- "1:"
-
- /*
- * sample = *src;
- * if (cmpxchg(*dst, 0, 1) == 0)
- * sample -= *sum;
- * xadd(*sum, sample);
- */
- "\tmovw $0, %%ax\n"
- "\tmovw $1, %%cx\n"
- "\tlock; cmpxchgw %%cx, (%%edi)\n"
- "\tmovswl (%%esi), %%ecx\n"
- "\tjnz 2f\n"
- "\tsubl (%%ebx), %%ecx\n"
- "2:"
- "\tlock; addl %%ecx, (%%ebx)\n"
-
- /*
- * do {
- * sample = old_sample = *sum;
- * saturate(v);
- * *dst = sample;
- * } while (v != *sum);
- */
-
- "3:"
- "\tmovl (%%ebx), %%ecx\n"
- "\tcmpl $0x7fff,%%ecx\n"
- "\tjg 4f\n"
- "\tcmpl $-0x8000,%%ecx\n"
- "\tjl 5f\n"
- "\tmovw %%cx, (%%edi)\n"
- "\tcmpl %%ecx, (%%ebx)\n"
- "\tjnz 3b\n"
-
- /*
- * while (size-- > 0)
- */
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %%edx\n"
- "\tjnz 1b\n"
- "\tjmp 6f\n"
-
- /*
- * sample > 0x7fff
- */
-
- "\t.p2align 4,,15\n"
-
- "4:"
- "\tmovw $0x7fff, %%ax\n"
- "\tmovw %%ax, (%%edi)\n"
- "\tcmpl %%ecx,(%%ebx)\n"
- "\tjnz 3b\n"
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %%edx\n"
- "\tjnz 1b\n"
- "\tjmp 6f\n"
-
- /*
- * sample < -0x8000
- */
-
- "\t.p2align 4,,15\n"
-
- "5:"
- "\tmovw $-0x8000, %%ax\n"
- "\tmovw %%ax, (%%edi)\n"
- "\tcmpl %%ecx, (%%ebx)\n"
- "\tjnz 3b\n"
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %%edx\n"
- "\tjnz 1b\n"
- // "\tjmp 6f\n"
-
- "6:"
-
- : /* no output regs */
- : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
- : "esi", "edi", "edx", "ecx", "ebx", "eax"
- );
-}
-
-/*
- * MMX optimized
- */
-static void mix_areas1_mmx(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)
-{
- /*
- * ESI - src
- * EDI - dst
- * EBX - sum
- * ECX - old sample
- * EAX - sample / temporary
- * EDX - size
- */
- __asm__ __volatile__ (
- "\n"
-
- /*
- * initialization, load EDX, ESI, EDI, EBX registers
- */
- "\tmovl %0, %%edx\n"
- "\tmovl %1, %%edi\n"
- "\tmovl %2, %%esi\n"
- "\tmovl %3, %%ebx\n"
-
- /*
- * while (size-- > 0) {
- */
- "\tcmp $0, %%edx\n"
- "jz 6f\n"
-
- "\t.p2align 4,,15\n"
-
- "1:"
-
- /*
- * sample = *src;
- * if (cmpxchg(*dst, 0, 1) == 0)
- * sample -= *sum;
- * xadd(*sum, sample);
- */
- "\tmovw $0, %%ax\n"
- "\tmovw $1, %%cx\n"
- "\tlock; cmpxchgw %%cx, (%%edi)\n"
- "\tmovswl (%%esi), %%ecx\n"
- "\tjnz 2f\n"
- "\tsubl (%%ebx), %%ecx\n"
- "2:"
- "\tlock; addl %%ecx, (%%ebx)\n"
-
- /*
- * do {
- * sample = old_sample = *sum;
- * saturate(v);
- * *dst = sample;
- * } while (v != *sum);
- */
-
- "3:"
- "\tmovl (%%ebx), %%ecx\n"
- "\tmovd %%ecx, %%mm0\n"
- "\tpackssdw %%mm1, %%mm0\n"
- "\tmovd %%mm0, %%eax\n"
- "\tmovw %%ax, (%%edi)\n"
- "\tcmpl %%ecx, (%%ebx)\n"
- "\tjnz 3b\n"
-
- /*
- * while (size-- > 0)
- */
- "\tadd %4, %%edi\n"
- "\tadd %5, %%esi\n"
- "\tadd %6, %%ebx\n"
- "\tdecl %%edx\n"
- "\tjnz 1b\n"
- "\tjmp 6f\n"
-
- "6:"
-
- "\temms\n"
-
- : /* no output regs */
- : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
- : "esi", "edi", "edx", "ecx", "ebx", "eax"
- );
-}
+#define MIX_AREAS1 mix_areas1
+#define MIX_AREAS1_MMX mix_areas1_mmx
+#define LOCK_PREFIX ""
+#include "pcm_dmix_i386.h"
+#undef MIX_AREAS1
+#undef MIX_AREAS1_MMX
+#undef LOCK_PREFIX
+
+#define MIX_AREAS1 mix_areas1_smp
+#define MIX_AREAS1_MMX mix_areas1_smp_mmx
+#define LOCK_PREFIX "lock ; "
+#include "pcm_dmix_i386.h"
+#undef MIX_AREAS1
+#undef MIX_AREAS1_MMX
+#undef LOCK_PREFIX
static void mix_select_callbacks(snd_pcm_dmix_t *dmix)
{
FILE *in;
char line[255];
+ int smp = 0, mmx = 0;
/* safe settings for all i386 CPUs */
- dmix->mix_areas1 = mix_areas1;
+ 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, "flags", 5)) {
- fclose(in);
- if (strstr(line, " mmx")) {
- // printf("Selecting MMX mix_areas1\n");
- dmix->mix_areas1 = mix_areas1_mmx;
- }
- return;
+ if (!strncmp(line, "processor", 9))
+ smp++;
+ else if (!strncmp(line, "flags", 5)) {
+ if (strstr(line, " mmx"))
+ mmx = 1;
}
}
+ fclose(in);
+ printf("MMX: %i, SMP: %i\n", mmx, smp);
+ if (mmx) {
+ dmix->mix_areas1 = smp > 1 ? mix_areas1_smp_mmx : mix_areas1_mmx;
+ } else {
+ dmix->mix_areas1 = smp > 1 ? mix_areas1_smp : mix_areas1;
+ }
}
#endif
--- /dev/null
+/**
+ * \file pcm/pcm_dmix_i386.h
+ * \ingroup PCM_Plugins
+ * \brief PCM Direct Stream Mixing (dmix) Plugin Interface - I386 assembler code
+ * \author Jaroslav Kysela <perex@suse.cz>
+ * \date 2002
+ */
+/*
+ * PCM - Direct Stream Mixing
+ * Copyright (c) 2000 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ * This library 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.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/*
+ * for plain i386
+ */
+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)
+{
+ /*
+ * ESI - src
+ * EDI - dst
+ * EBX - sum
+ * ECX - old sample
+ * EAX - sample / temporary
+ * EDX - size
+ */
+ __asm__ __volatile__ (
+ "\n"
+
+ /*
+ * initialization, load EDX, ESI, EDI, EBX registers
+ */
+ "\tmovl %0, %%edx\n"
+ "\tmovl %1, %%edi\n"
+ "\tmovl %2, %%esi\n"
+ "\tmovl %3, %%ebx\n"
+
+ /*
+ * while (size-- > 0) {
+ */
+ "\tcmp $0, %%edx\n"
+ "jz 6f\n"
+
+ "\t.p2align 4,,15\n"
+
+ "1:"
+
+ /*
+ * sample = *src;
+ * if (cmpxchg(*dst, 0, 1) == 0)
+ * sample -= *sum;
+ * xadd(*sum, sample);
+ */
+ "\tmovw $0, %%ax\n"
+ "\tmovw $1, %%cx\n"
+ "\t" LOCK_PREFIX "cmpxchgw %%cx, (%%edi)\n"
+ "\tmovswl (%%esi), %%ecx\n"
+ "\tjnz 2f\n"
+ "\tsubl (%%ebx), %%ecx\n"
+ "2:"
+ "\t" LOCK_PREFIX "addl %%ecx, (%%ebx)\n"
+
+ /*
+ * do {
+ * sample = old_sample = *sum;
+ * saturate(v);
+ * *dst = sample;
+ * } while (v != *sum);
+ */
+
+ "3:"
+ "\tmovl (%%ebx), %%ecx\n"
+ "\tcmpl $0x7fff,%%ecx\n"
+ "\tjg 4f\n"
+ "\tcmpl $-0x8000,%%ecx\n"
+ "\tjl 5f\n"
+ "\tmovw %%cx, (%%edi)\n"
+ "\tcmpl %%ecx, (%%ebx)\n"
+ "\tjnz 3b\n"
+
+ /*
+ * while (size-- > 0)
+ */
+ "\tadd %4, %%edi\n"
+ "\tadd %5, %%esi\n"
+ "\tadd %6, %%ebx\n"
+ "\tdecl %%edx\n"
+ "\tjnz 1b\n"
+ "\tjmp 6f\n"
+
+ /*
+ * sample > 0x7fff
+ */
+
+ "\t.p2align 4,,15\n"
+
+ "4:"
+ "\tmovw $0x7fff, %%ax\n"
+ "\tmovw %%ax, (%%edi)\n"
+ "\tcmpl %%ecx,(%%ebx)\n"
+ "\tjnz 3b\n"
+ "\tadd %4, %%edi\n"
+ "\tadd %5, %%esi\n"
+ "\tadd %6, %%ebx\n"
+ "\tdecl %%edx\n"
+ "\tjnz 1b\n"
+ "\tjmp 6f\n"
+
+ /*
+ * sample < -0x8000
+ */
+
+ "\t.p2align 4,,15\n"
+
+ "5:"
+ "\tmovw $-0x8000, %%ax\n"
+ "\tmovw %%ax, (%%edi)\n"
+ "\tcmpl %%ecx, (%%ebx)\n"
+ "\tjnz 3b\n"
+ "\tadd %4, %%edi\n"
+ "\tadd %5, %%esi\n"
+ "\tadd %6, %%ebx\n"
+ "\tdecl %%edx\n"
+ "\tjnz 1b\n"
+ // "\tjmp 6f\n"
+
+ "6:"
+
+ : /* no output regs */
+ : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
+ : "esi", "edi", "edx", "ecx", "ebx", "eax"
+ );
+}
+
+/*
+ * MMX optimized
+ */
+static void MIX_AREAS1_MMX(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)
+{
+ /*
+ * ESI - src
+ * EDI - dst
+ * EBX - sum
+ * ECX - old sample
+ * EAX - sample / temporary
+ * EDX - size
+ */
+ __asm__ __volatile__ (
+ "\n"
+
+ /*
+ * initialization, load EDX, ESI, EDI, EBX registers
+ */
+ "\tmovl %0, %%edx\n"
+ "\tmovl %1, %%edi\n"
+ "\tmovl %2, %%esi\n"
+ "\tmovl %3, %%ebx\n"
+
+ /*
+ * while (size-- > 0) {
+ */
+ "\tcmp $0, %%edx\n"
+ "jz 6f\n"
+
+ "\t.p2align 4,,15\n"
+
+ "1:"
+
+ /*
+ * sample = *src;
+ * if (cmpxchg(*dst, 0, 1) == 0)
+ * sample -= *sum;
+ * xadd(*sum, sample);
+ */
+ "\tmovw $0, %%ax\n"
+ "\tmovw $1, %%cx\n"
+ "\t" LOCK_PREFIX "cmpxchgw %%cx, (%%edi)\n"
+ "\tmovswl (%%esi), %%ecx\n"
+ "\tjnz 2f\n"
+ "\tsubl (%%ebx), %%ecx\n"
+ "2:"
+ "\t" LOCK_PREFIX "addl %%ecx, (%%ebx)\n"
+
+ /*
+ * do {
+ * sample = old_sample = *sum;
+ * saturate(v);
+ * *dst = sample;
+ * } while (v != *sum);
+ */
+
+ "3:"
+ "\tmovl (%%ebx), %%ecx\n"
+ "\tmovd %%ecx, %%mm0\n"
+ "\tpackssdw %%mm1, %%mm0\n"
+ "\tmovd %%mm0, %%eax\n"
+ "\tmovw %%ax, (%%edi)\n"
+ "\tcmpl %%ecx, (%%ebx)\n"
+ "\tjnz 3b\n"
+
+ /*
+ * while (size-- > 0)
+ */
+ "\tadd %4, %%edi\n"
+ "\tadd %5, %%esi\n"
+ "\tadd %6, %%ebx\n"
+ "\tdecl %%edx\n"
+ "\tjnz 1b\n"
+ "\tjmp 6f\n"
+
+ "6:"
+
+ "\temms\n"
+
+ : /* no output regs */
+ : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
+ : "esi", "edi", "edx", "ecx", "ebx", "eax"
+ );
+}
git://git.alsa-project.org / alsa-lib.git / commitdiff