diff options
| author | yo mama <pepper@scannerjammer.com> | 2015-06-19 16:24:27 -0400 |
|---|---|---|
| committer | yo mama <pepper@scannerjammer.com> | 2015-06-19 16:24:27 -0400 |
| commit | 8adfb3bd99b4dcff2459756af090a640fd7a4b4a (patch) | |
| tree | c1e6adddda335f4d36a98039ccc5ac867ae7296d /pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp | |
clone
Diffstat (limited to 'pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp')
| -rw-r--r-- | pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp b/pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp new file mode 100644 index 0000000..c6c5424 --- /dev/null +++ b/pysoundtouch/soundtouch/source/SoundTouch/cpu_detect_x86_win.cpp @@ -0,0 +1,129 @@ +////////////////////////////////////////////////////////////////////////////////
+///
+/// Win32 version of the x86 CPU detect routine.
+///
+/// This file is to be compiled in Windows platform with Microsoft Visual C++
+/// Compiler. Please see 'cpu_detect_x86_gcc.cpp' for the gcc compiler version
+/// for all GNU platforms.
+///
+/// Author : Copyright (c) Olli Parviainen
+/// Author e-mail : oparviai 'at' iki.fi
+/// SoundTouch WWW: http://www.surina.net/soundtouch
+///
+////////////////////////////////////////////////////////////////////////////////
+//
+// Last changed : $Date: 2009-02-13 18:22:48 +0200 (Fri, 13 Feb 2009) $
+// File revision : $Revision: 4 $
+//
+// $Id: cpu_detect_x86_win.cpp 62 2009-02-13 16:22:48Z oparviai $
+//
+////////////////////////////////////////////////////////////////////////////////
+//
+// License :
+//
+// SoundTouch audio processing library
+// Copyright (c) Olli Parviainen
+//
+// 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 library 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
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include "cpu_detect.h"
+
+#ifndef WIN32
+#error wrong platform - this source code file is exclusively for Win32 platform
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// processor instructions extension detection routines
+//
+//////////////////////////////////////////////////////////////////////////////
+
+// Flag variable indicating whick ISA extensions are disabled (for debugging)
+static uint _dwDisabledISA = 0x00; // 0xffffffff; //<- use this to disable all extensions
+
+
+// Disables given set of instruction extensions. See SUPPORT_... defines.
+void disableExtensions(uint dwDisableMask)
+{
+ _dwDisabledISA = dwDisableMask;
+}
+
+
+
+/// Checks which instruction set extensions are supported by the CPU.
+uint detectCPUextensions(void)
+{
+ uint res = 0;
+
+ if (_dwDisabledISA == 0xffffffff) return 0;
+
+ _asm
+ {
+ ; check if 'cpuid' instructions is available by toggling eflags bit 21
+ ;
+ xor esi, esi ; clear esi = result register
+
+ pushfd ; save eflags to stack
+ mov eax,dword ptr [esp] ; load eax from stack (with eflags)
+ mov ecx, eax ; save the original eflags values to ecx
+ xor eax, 0x00200000 ; toggle bit 21
+ mov dword ptr [esp],eax ; store toggled eflags to stack
+ popfd ; load eflags from stack
+
+ pushfd ; save updated eflags to stack
+ mov eax,dword ptr [esp] ; load eax from stack
+ popfd ; pop stack to restore stack pointer
+
+ xor edx, edx ; clear edx for defaulting no mmx
+ cmp eax, ecx ; compare to original eflags values
+ jz end ; jumps to 'end' if cpuid not present
+
+ ; cpuid instruction available, test for presence of mmx instructions
+ mov eax, 1
+ cpuid
+ test edx, 0x00800000
+ jz end ; branch if MMX not available
+
+ or esi, SUPPORT_MMX ; otherwise add MMX support bit
+
+ test edx, 0x02000000
+ jz test3DNow ; branch if SSE not available
+
+ or esi, SUPPORT_SSE ; otherwise add SSE support bit
+
+ test3DNow:
+ ; test for precense of AMD extensions
+ mov eax, 0x80000000
+ cpuid
+ cmp eax, 0x80000000
+ jbe end ; branch if no AMD extensions detected
+
+ ; test for precense of 3DNow! extension
+ mov eax, 0x80000001
+ cpuid
+ test edx, 0x80000000
+ jz end ; branch if 3DNow! not detected
+
+ or esi, SUPPORT_3DNOW ; otherwise add 3DNow support bit
+
+ end:
+
+ mov res, esi
+ }
+
+ return res & ~_dwDisabledISA;
+}
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