1 files changed, 122 insertions, 0 deletions
diff --git a/src/pulsecore/cpu-x86.c b/src/pulsecore/cpu-x86.c
new file mode 100644
index 00000000..bc093ec0
--- /dev/null
+++ b/src/pulsecore/cpu-x86.c
@@ -0,0 +1,122 @@
+/***
+  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 <stdint.h>
+
+#include <pulsecore/log.h>
+
+#include "cpu-x86.h"
+
+#if defined (__i386__) || defined (__amd64__)
+static void
+get_cpuid (uint32_t op, uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
+{
+    __asm__ __volatile__ (
+        "  push %%"PA_REG_b"   \n\t"
+        "  cpuid               \n\t"
+        "  mov %%ebx, %%esi    \n\t"
+        "  pop %%"PA_REG_b"    \n\t"
+
+        : "=a" (*a), "=S" (*b), "=c" (*c), "=d" (*d)
+        : "0" (op)
+    );
+}
+#endif
+
+void pa_cpu_init_x86 (void) {
+#if defined (__i386__) || defined (__amd64__)
+    uint32_t eax, ebx, ecx, edx;
+    uint32_t level;
+    pa_cpu_x86_flag_t flags = 0;
+
+    /* get standard level */
+    get_cpuid (0x00000000, &level, &ebx, &ecx, &edx);
+    if (level >= 1) {
+        get_cpuid (0x00000001, &eax, &ebx, &ecx, &edx);
+
+        if (edx & (1<<23))
+          flags |= PA_CPU_X86_MMX;
+
+        if (edx & (1<<25))
+          flags |= PA_CPU_X86_SSE;
+
+        if (edx & (1<<26))
+          flags |= PA_CPU_X86_SSE2;
+
+        if (ecx & (1<<0))
+          flags |= PA_CPU_X86_SSE3;
+
+        if (ecx & (1<<9))
+          flags |= PA_CPU_X86_SSSE3;
+
+        if (ecx & (1<<19))
+          flags |= PA_CPU_X86_SSE4_1;
+
+        if (ecx & (1<<20))
+          flags |= PA_CPU_X86_SSE4_2;
+    }
+
+    /* get extended level */
+    get_cpuid (0x80000000, &level, &ebx, &ecx, &edx);
+    if (level >= 0x80000001) {
+        get_cpuid (0x80000001, &eax, &ebx, &ecx, &edx);
+
+        if (edx & (1<<22))
+          flags |= PA_CPU_X86_MMXEXT;
+
+        if (edx & (1<<23))
+          flags |= PA_CPU_X86_MMX;
+
+        if (edx & (1<<30))
+          flags |= PA_CPU_X86_3DNOWEXT;
+
+        if (edx & (1<<31))
+          flags |= PA_CPU_X86_3DNOW;
+    }
+
+    pa_log_info ("CPU flags: %s%s%s%s%s%s%s%s%s%s",
+    (flags & PA_CPU_X86_MMX) ? "MMX " : "",
+    (flags & PA_CPU_X86_SSE) ? "SSE " : "",
+    (flags & PA_CPU_X86_SSE2) ? "SSE2 " : "",
+    (flags & PA_CPU_X86_SSE3) ? "SSE3 " : "",
+    (flags & PA_CPU_X86_SSSE3) ? "SSSE3 " : "",
+    (flags & PA_CPU_X86_SSE4_1) ? "SSE4_1 " : "",
+    (flags & PA_CPU_X86_SSE4_2) ? "SSE4_2 " : "",
+    (flags & PA_CPU_X86_MMXEXT) ? "MMXEXT " : "",
+    (flags & PA_CPU_X86_3DNOW) ? "3DNOW " : "",
+    (flags & PA_CPU_X86_3DNOWEXT) ? "3DNOWEXT " : "");
+
+    /* activate various optimisations */
+    if (flags & PA_CPU_X86_MMX) {
+        pa_volume_func_init_mmx (flags);
+        pa_remap_func_init_mmx (flags);
+    }
+
+    if (flags & PA_CPU_X86_SSE)
+        pa_volume_func_init_sse (flags);
+
+#endif /* defined (__i386__) || defined (__amd64__) */
+}