diff options
Diffstat (limited to 'lib/soundtouch-1.6.0/cpu_detect_x86_gcc.cpp')
| -rw-r--r-- | lib/soundtouch-1.6.0/cpu_detect_x86_gcc.cpp | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/lib/soundtouch-1.6.0/cpu_detect_x86_gcc.cpp b/lib/soundtouch-1.6.0/cpu_detect_x86_gcc.cpp deleted file mode 100644 index 823a0644a5..0000000000 --- a/lib/soundtouch-1.6.0/cpu_detect_x86_gcc.cpp +++ /dev/null @@ -1,140 +0,0 @@ -//////////////////////////////////////////////////////////////////////////////// -/// -/// Generic version of the x86 CPU extension detection routine. -/// -/// This file is for GNU & other non-Windows compilers, see 'cpu_detect_x86_win.cpp' -/// for the Microsoft compiler version. -/// -/// Author : Copyright (c) Olli Parviainen -/// Author e-mail : oparviai 'at' iki.fi -/// SoundTouch WWW: http://www.surina.net/soundtouch -/// -//////////////////////////////////////////////////////////////////////////////// -// -// Last changed : $Date: 2011-07-16 15:27:51 +0300 (Sat, 16 Jul 2011) $ -// File revision : $Revision: 4 $ -// -// $Id: cpu_detect_x86_gcc.cpp 123 2011-07-16 12:27:51Z 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 <stdexcept> -#include <string> -#include "cpu_detect.h" -#include "STTypes.h" - -using namespace std; - -#include <stdio.h> - -////////////////////////////////////////////////////////////////////////////// -// -// 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) -{ -#if (!(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS) || !(__GNUC__)) - - return 0; // always disable extensions on non-x86 platforms. - -#else - uint res = 0; - - if (_dwDisabledISA == 0xffffffff) return 0; - - asm volatile( -#ifndef __x86_64__ - // Check if 'cpuid' instructions is available by toggling eflags bit 21. - // Skip this for x86-64 as they always have cpuid while stack manipulation - // differs from 16/32bit ISA. - "\n\txor %%esi, %%esi" // clear %%esi = result register - - "\n\tpushf" // save eflags to stack - "\n\tmovl (%%esp), %%eax" // load eax from stack (with eflags) - "\n\tmovl %%eax, %%ecx" // save the original eflags values to ecx - "\n\txor $0x00200000, %%eax" // toggle bit 21 - "\n\tmovl %%eax, (%%esp)" // store toggled eflags to stack - "\n\tpopf" // load eflags from stack - "\n\tpushf" // save updated eflags to stack - "\n\tmovl (%%esp), %%eax" // load eax from stack - "\n\tpopf" // pop stack to restore esp - "\n\txor %%edx, %%edx" // clear edx for defaulting no mmx - "\n\tcmp %%ecx, %%eax" // compare to original eflags values - "\n\tjz end" // jumps to 'end' if cpuid not present -#endif // __x86_64__ - - // cpuid instruction available, test for presence of mmx instructions - - "\n\tmovl $1, %%eax" - "\n\tcpuid" - "\n\ttest $0x00800000, %%edx" - "\n\tjz end" // branch if MMX not available - - "\n\tor $0x01, %%esi" // otherwise add MMX support bit - - "\n\ttest $0x02000000, %%edx" - "\n\tjz test3DNow" // branch if SSE not available - - "\n\tor $0x08, %%esi" // otherwise add SSE support bit - - "\n\ttest3DNow:" - // test for precense of AMD extensions - "\n\tmov $0x80000000, %%eax" - "\n\tcpuid" - "\n\tcmp $0x80000000, %%eax" - "\n\tjbe end" // branch if no AMD extensions detected - - // test for precense of 3DNow! extension - "\n\tmov $0x80000001, %%eax" - "\n\tcpuid" - "\n\ttest $0x80000000, %%edx" - "\n\tjz end" // branch if 3DNow! not detected - - "\n\tor $0x02, %%esi" // otherwise add 3DNow support bit - - "\n\tend:" - - "\n\tmov %%esi, %0" - - : "=r" (res) - : /* no inputs */ - : "%edx", "%eax", "%ecx", "%esi" ); - - return res & ~_dwDisabledISA; -#endif -} |