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Diffstat (limited to 'kdefx/kcpuinfo.cpp')
| -rw-r--r-- | kdefx/kcpuinfo.cpp | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/kdefx/kcpuinfo.cpp b/kdefx/kcpuinfo.cpp deleted file mode 100644 index 97c99f8d9..000000000 --- a/kdefx/kcpuinfo.cpp +++ /dev/null @@ -1,176 +0,0 @@ -/* - * This file is part of the KDE libraries - * Copyright (C) 2003 Fredrik Höglund <fredrik@kde.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <csignal> -#include <csetjmp> - -#include <config.h> -#include "kcpuinfo.h" - - -#if defined(__GNUC__) || defined(__INTEL_COMPILER) -# define HAVE_GNU_INLINE_ASM -#endif - -typedef void (*kde_sighandler_t) (int); - -#ifdef __i386__ -static jmp_buf env; - -// Sighandler for the SSE OS support check -static void sighandler( int ) -{ - std::longjmp( env, 1 ); -} -#endif - -#ifdef __PPC__ -static sigjmp_buf KDE_NO_EXPORT jmpbuf; -static sig_atomic_t KDE_NO_EXPORT canjump = 0; - -static void KDE_NO_EXPORT sigill_handler( int sig ) -{ - if ( !canjump ) { - signal( sig, SIG_DFL ); - raise( sig ); - } - canjump = 0; - siglongjmp( jmpbuf, 1 ); -} -#endif - -static int getCpuFeatures() -{ - volatile int features = 0; - -#if defined( HAVE_GNU_INLINE_ASM ) -#if defined( __i386__ ) - bool haveCPUID = false; - bool have3DNOW = false; - int result = 0; - - // First check if the CPU supports the CPUID instruction - __asm__ __volatile__( - // Try to toggle the CPUID bit in the EFLAGS register - "pushf \n\t" // Push the EFLAGS register onto the stack - "popl %%ecx \n\t" // Pop the value into ECX - "movl %%ecx, %%edx \n\t" // Copy ECX to EDX - "xorl $0x00200000, %%ecx \n\t" // Toggle bit 21 (CPUID) in ECX - "pushl %%ecx \n\t" // Push the modified value onto the stack - "popf \n\t" // Pop it back into EFLAGS - - // Check if the CPUID bit was successfully toggled - "pushf \n\t" // Push EFLAGS back onto the stack - "popl %%ecx \n\t" // Pop the value into ECX - "xorl %%eax, %%eax \n\t" // Zero out the EAX register - "cmpl %%ecx, %%edx \n\t" // Compare ECX with EDX - "je .Lno_cpuid_support%= \n\t" // Jump if they're identical - "movl $1, %%eax \n\t" // Set EAX to true - ".Lno_cpuid_support%=: \n\t" - : "=a"(haveCPUID) : : "%ecx", "%edx" ); - - // If we don't have CPUID we won't have the other extensions either - if ( ! haveCPUID ) - return 0L; - - // Execute CPUID with the feature request bit set - __asm__ __volatile__( - "pushl %%ebx \n\t" // Save EBX - "movl $1, %%eax \n\t" // Set EAX to 1 (features request) - "cpuid \n\t" // Call CPUID - "popl %%ebx \n\t" // Restore EBX - : "=d"(result) : : "%eax", "%ecx" ); - - // Test bit 23 (MMX support) - if ( result & 0x00800000 ) - features |= KCPUInfo::IntelMMX; - - __asm__ __volatile__( - "pushl %%ebx \n\t" - "movl $0x80000000, %%eax \n\t" - "cpuid \n\t" - "cmpl $0x80000000, %%eax \n\t" - "jbe .Lno_extended%= \n\t" - "movl $0x80000001, %%eax \n\t" - "cpuid \n\t" - "test $0x80000000, %%edx \n\t" - "jz .Lno_extended%= \n\t" - "movl $1, %%eax \n\t" // // Set EAX to true - ".Lno_extended%=: \n\t" - "popl %%ebx \n\t" // Restore EBX - : "=a"(have3DNOW) : ); - - if ( have3DNOW ) - features |= KCPUInfo::AMD3DNOW; - -#ifdef HAVE_X86_SSE - // Test bit 25 (SSE support) - if ( result & 0x00200000 ) { - features |= KCPUInfo::IntelSSE; - - // OS support test for SSE. - // Install our own sighandler for SIGILL. - kde_sighandler_t oldhandler = std::signal( SIGILL, sighandler ); - - // Try executing an SSE insn to see if we get a SIGILL - if ( setjmp( env ) ) - features ^= KCPUInfo::IntelSSE; // The OS support test failed - else - __asm__ __volatile__("xorps %xmm0, %xmm0"); - - // Restore the default sighandler - std::signal( SIGILL, oldhandler ); - - // Test bit 26 (SSE2 support) - if ( (result & 0x00400000) && (features & KCPUInfo::IntelSSE) ) - features |= KCPUInfo::IntelSSE2; - - // Note: The OS requirements for SSE2 are the same as for SSE - // so we don't have to do any additional tests for that. - } -#endif // HAVE_X86_SSE -#elif defined __PPC__ && defined HAVE_PPC_ALTIVEC - signal( SIGILL, sigill_handler ); - if ( sigsetjmp( jmpbuf, 1 ) ) { - signal( SIGILL, SIG_DFL ); - } else { - canjump = 1; - __asm__ __volatile__( "mtspr 256, %0\n\t" - "vand %%v0, %%v0, %%v0" - : /* none */ - : "r" (-1) ); - signal( SIGILL, SIG_DFL ); - features |= KCPUInfo::AltiVec; - } -#endif // __i386__ -#endif //HAVE_GNU_INLINE_ASM - - return features; -} - -unsigned int KCPUInfo::s_features = getCpuFeatures(); - - |