Updated to soundtouch-1.3 (plus modifications)

git-svn-id: svn://localhost/trunk/ardour2@13 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 126 insertions, 0 deletions

diff --git a/libs/soundtouch/cpu_detect_x86_win.cpp b/libs/soundtouch/cpu_detect_x86_win.cpp
new file mode 100644
index 0000000000..fd04955d80
--- /dev/null
+++ b/libs/soundtouch/cpu_detect_x86_win.cpp
@@ -0,0 +1,126 @@
+////////////////////////////////////////////////////////////////////////////////
+///
+/// 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 @ iki.fi
+/// SoundTouch WWW: http://www.iki.fi/oparviai/soundtouch
+///
+////////////////////////////////////////////////////////////////////////////////
+//
+// Last changed  : $Date$
+// File revision : $Revision$
+//
+// $Id$
+//
+////////////////////////////////////////////////////////////////////////////////
+//
+// 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
+        pop     eax                 ; load eax from stack (with eflags)
+        mov     ecx, eax            ; save the original eflags values to ecx
+        xor     eax, 0x00200000     ; toggle bit 21
+        push    eax                 ; store toggled eflags to stack
+        popfd                       ; load eflags from stack
+        pushfd                      ; save updated eflags to stack
+        pop     eax                 ; load from stack
+        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;
+}