diff options
Diffstat (limited to 'dxr3cpu.c')
| -rw-r--r-- | dxr3cpu.c | 170 |
1 files changed, 86 insertions, 84 deletions
@@ -29,111 +29,113 @@ //! constructor cDxr3CPU::cDxr3CPU() { - unsigned long eax,ebx,edx,unused; - - // readout the vendor - Cpuid(0,eax,ebx,unused,edx); - - // set Vendor to "" - memset(m_Info.Vendor, 0, 16); - - // connect the single register values to the vendor string - // maybe there is an better solution - i will google :) - *(unsigned long *)(m_Info.Vendor) = ebx; - *(unsigned long *)(m_Info.Vendor + 4) = edx; - *(unsigned long *)(m_Info.Vendor + 8) = unused; - - // check the features - // could we get the needed infos? - if (Cpuid(1,eax,ebx,unused,edx)) + unsigned long eax, ebx, edx, unused; + + // readout the vendor + Cpuid(0, eax, ebx, unused, edx); + + // set Vendor to "" + memset(m_Info.Vendor, 0, 16); + + // connect the single register values to the vendor string + // maybe there is an better solution - i will google :) + *(unsigned long *)(m_Info.Vendor) = ebx; + *(unsigned long *)(m_Info.Vendor + 4) = edx; + *(unsigned long *)(m_Info.Vendor + 8) = unused; + + // check the features + // could we get the needed infos? + if (Cpuid(1, eax, ebx, unused, edx)) + { + m_Info.MMX = ((edx & 1<<23) != 0); + m_Info.SSE = ((edx & 1<<25) != 0); + m_Info.SSE2 = ((edx & 1<<26) != 0); + m_Info.RDTSC = ((edx & 1<<4) != 0); /*0x10*/ + m_Info.HT = ((edx & 1<<28) !=0 ); // need additional checks? + + // 3DNow is a litle bit harder to read out + // We read the ext. CPUID level 0x80000000 + if (Cpuid(0x80000000, eax, ebx, unused, edx)) { - m_Info.MMX = ((edx & 1<<23) != 0); - m_Info.SSE = ((edx & 1<<25) != 0); - m_Info.SSE2= ((edx & 1<<26) != 0); - m_Info.RDTSC=((edx & 1<<4) != 0); /*0x10*/ - m_Info.HT = ((edx & 1<<28) !=0); // should we do here addinonal checks? - - // 3DNow is a litle bit harder to read out - // We read the ext. CPUID level 0x80000000 - if (Cpuid(0x80000000,eax,ebx,unused,edx)) + // now in eax there is the max. supported extended CPUID level + // we check if theres an extended CPUID level support + if (eax >= 0x80000001) + { + // If we can access the extended CPUID level 0x80000001 we + // get the edx register + if (Cpuid(0x80000001, eax, ebx, unused, edx)) { - // now in eax there is the max. supported extended CPUID level - // we check if theres an extended CPUID level support - if (eax >= 0x80000001) - { - // If we can access the extended CPUID level 0x80000001 we get the - // edx register - if (Cpuid(0x80000001,eax,ebx,unused,edx)) - { - // Now we can mask some AMD specific cpu extensions - // 22 ... Extended MMX_MultimediaExtensions - m_Info.MMXEXT = ((edx & 1<<22) != 0); - m_Info.AMD64Bit = ((edx & 1<<29) != 0); - // 30 ... Extended 3DNOW_InstructionExtensions - m_Info.Now = ((edx & (1<<31)) != 0); - } - } + // Now we can mask some AMD specific cpu extensions + // 22 ... Extended MMX_MultimediaExtensions + m_Info.MMXEXT = ((edx & 1<<22) != 0); + m_Info.AMD64Bit = ((edx & 1<<29) != 0); + // 30 ... Extended 3DNOW_InstructionExtensions + m_Info.Now = ((edx & 1<<31) != 0); } + } } + } - // MPlayer, Xine-lib, Transcode: SSE implies MMXEXT - m_Info.MMXEXT = m_Info.MMXEXT || m_Info.SSE; + // MPlayer, Xine-lib, Transcode: SSE implies MMXEXT + m_Info.MMXEXT = m_Info.MMXEXT || m_Info.SSE; - // fill cabs - if (m_Info.MMX) - { - m_Info.caps |= CC_MMX; - } + // fill cabs + if (m_Info.MMX) + { + m_Info.caps |= CC_MMX; + } - if (m_Info.MMXEXT) - { - m_Info.caps |= CC_MMXEXT; - } + if (m_Info.MMXEXT) + { + m_Info.caps |= CC_MMXEXT; + } - if (m_Info.SSE) - { - m_Info.caps |= CC_SSE; - } + if (m_Info.SSE) + { + m_Info.caps |= CC_SSE; + } - if (m_Info.Now) - { - m_Info.caps |= CC_3DNOW; - } + if (m_Info.Now) + { + m_Info.caps |= CC_3DNOW; + } + + // print some infos about cpu + cLog::Instance() << "cpu vendor: " << m_Info.Vendor << "\n"; + cLog::Instance() << "cpu extensions:\n"; + cLog::Instance() << "mmx: " << m_Info.MMX << "\n"; + cLog::Instance() << "mmx-ext: " << m_Info.MMXEXT << "\n"; + cLog::Instance() << "sse: " << m_Info.SSE << "\n"; + cLog::Instance() << "sse2: " << m_Info.SSE2 << "\n"; + cLog::Instance() << "3dnow: " << m_Info.Now << "\n"; - // print some infos about cpu - cLog::Instance() << "cpu vendor: " << m_Info.Vendor << "\n"; - cLog::Instance() << "cpu extensions:\n"; - cLog::Instance() << "mmx: " << m_Info.MMX << "\n"; - cLog::Instance() << "mmx-ext: " << m_Info.MMXEXT << "\n"; - cLog::Instance() << "sse: " << m_Info.SSE << "\n"; - cLog::Instance() << "sse2: " << m_Info.SSE2 << "\n"; - cLog::Instance() << "3dnow: " << m_Info.Now << "\n"; - - // now we select the best memcpy mehtode - cDxr3MemcpyBench Benchmark(m_Info.caps); + // now we select the best memcpy mehtode + cDxr3MemcpyBench Benchmark(m_Info.caps); } // ================================== //! does the cpu support cpuid instructions bool cDxr3CPU::CheckCPUIDPresence() { - // todo - return true; + // todo + return true; } // ================================== //! cpuid function -bool cDxr3CPU::Cpuid(unsigned long function, unsigned long& out_eax, unsigned long& out_ebx, unsigned long& out_ecx, unsigned long& out_edx) +bool cDxr3CPU::Cpuid(unsigned long function, unsigned long& out_eax, + unsigned long& out_ebx, unsigned long& out_ecx, + unsigned long& out_edx) { - // This works with PIC/non-PIC, from ffmpeg (libavcodec/i386/cputest.c) - __asm __volatile \ - ("movl %%ebx, %%esi\n\t" \ - "cpuid\n\t" \ - "xchgl %%ebx, %%esi" \ - : "=a" (out_eax), "=S" (out_ebx), \ - "=c" (out_ecx), "=d" (out_edx) \ - : "0" (function)); - return true; + // This works with PIC/non-PIC, from ffmpeg (libavcodec/i386/cputest.c) + __asm __volatile \ + ("movl %%ebx, %%esi\n\t" \ + "cpuid\n\t" \ + "xchgl %%ebx, %%esi" \ + : "=a" (out_eax), "=S" (out_ebx), \ + "=c" (out_ecx), "=d" (out_edx) \ + : "0" (function)); + return true; } // Local variables: |