1 files changed, 132 insertions, 0 deletions
diff --git a/src/pulsecore/cpu-x86.c b/src/pulsecore/cpu-x86.c
new file mode 100644
index 0000000..4e59e14
--- /dev/null
+++ b/src/pulsecore/cpu-x86.c
@@ -0,0 +1,132 @@
+/***
+  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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdint.h>
+
+#ifdef HAVE_CPUID_H
+#include <cpuid.h>
+#endif
+
+#include <pulsecore/log.h>
+
+#include "cpu-x86.h"
+
+void pa_cpu_get_x86_flags(pa_cpu_x86_flag_t *flags) {
+#if (defined(__i386__) || defined(__amd64__)) && defined(HAVE_CPUID_H)
+    uint32_t eax, ebx, ecx, edx;
+    uint32_t level;
+
+    *flags = 0;
+
+    /* get standard level */
+    if (__get_cpuid(0x00000000, &level, &ebx, &ecx, &edx) == 0)
+        goto finish;
+
+    if (level >= 1) {
+        if (__get_cpuid(0x00000001, &eax, &ebx, &ecx, &edx) == 0)
+            goto finish;
+
+        if (edx & (1<<15))
+          *flags |= PA_CPU_X86_CMOV;
+
+        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 */
+    if (__get_cpuid(0x80000000, &level, &ebx, &ecx, &edx) == 0)
+        goto finish;
+
+    if (level >= 0x80000001) {
+        if (__get_cpuid(0x80000001, &eax, &ebx, &ecx, &edx) == 0)
+            goto finish;
+
+        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;
+    }
+
+finish:
+    pa_log_info("CPU flags: %s%s%s%s%s%s%s%s%s%s%s",
+    (*flags & PA_CPU_X86_CMOV) ? "CMOV " : "",
+    (*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 " : "");
+#endif /* (defined(__i386__) || defined(__amd64__)) && defined(HAVE_CPUID_H) */
+}
+
+bool pa_cpu_init_x86(pa_cpu_x86_flag_t *flags) {
+#if defined (__i386__) || defined (__amd64__)
+    pa_cpu_get_x86_flags(flags);
+
+    /* 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_CPU_X86_SSE2)) {
+        pa_volume_func_init_sse(*flags);
+        pa_remap_func_init_sse(*flags);
+        pa_convert_func_init_sse(*flags);
+    }
+
+    return true;
+#else /* defined (__i386__) || defined (__amd64__) */
+    return false;
+#endif /* defined (__i386__) || defined (__amd64__) */
+}