mirror of https://github.com/BOINC/boinc.git
396 lines
9.7 KiB
C++
396 lines
9.7 KiB
C++
/***************
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*
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* opt_x86cpu.hpp: x86 CPU specific identification routines
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* Originator: Ben Herndon
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*
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* to be used with seti @ home client code
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*
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*/
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#include <stdio.h>
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#include "optimize.hpp"
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#include "optBench.hpp"
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#include "opt_x86.h"
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#include <string.h>
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#include "cpuid_tbl.h"
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#include "util.h"
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#if defined(__GNUC__)
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__inline UINT32 CPUID_X86 (UINT32 cmd, UINT32 &eax, UINT32 &ebx, UINT32 &ecx, UINT32 &edx)
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{
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asm ("cpuid"
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: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
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: "a" (cmd) );
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return eax;
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}
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#endif // Not __GNUC__
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#if defined(_MSC_VER) || defined(_ICC)
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static _uint32 CPUID_X86
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(_uint32 command, _uint32 &_eax, _uint32 &_ebx, _uint32 &_ecx, _uint32 &_edx)
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{
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__asm {
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mov eax, [command]
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cpuid ; <<CPUID>>
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push eax
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mov eax, [_ebx]
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mov [eax], ebx
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mov eax, [_ecx]
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mov [eax], ecx
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mov eax, [_edx]
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mov [eax], edx
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mov eax,[_eax]
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pop ebx
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mov [eax], ebx
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}
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return _eax;
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}
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#endif
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//===========[ PROTOTYPES ]==================
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extern _uint32 calcOurMhz(void) ;
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//--------------- class CPU_INFO_t
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#define EXT_CMD 0x80000000
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static __forceinline bool __fastcall testBit(_uint32 flags, int bitShift) {
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return ((flags & (1<<bitShift)) != 0);
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}
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//
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// CPU_INFO_t - CONSTRUCTOR
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//
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CPU_INFO_t::CPU_INFO_t (void) {
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UINT32 dummy, dummy1, flags1, flags2, flags3;
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has_mmx =
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has_sse =
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has_sse2 =
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has_sseOS =
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has_3Dnow =
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has_3DnowPlus =
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has_mmxPlus = false;
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cpuMhz = 0;
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busMhz = 0;
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// 1. Establish that the processor has support for CPUID.
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checkCpuidOpcode();
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if( !has_cpuid_opcode) return;
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// 2. Get vendor string and the highest standard function supported.
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CPUID_X86(0, cpu.max_stdFunc, vendor.id.longs[0], vendor.id.longs[2], vendor.id.longs[1]);
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if(cpu.max_stdFunc < 1) return;
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vendor.id.name[12] = '\0';
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// 3. execute CPUID function 1, which returns the standard feature flags in the EDX register.
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CPUID_X86(1, flags1, flags3, dummy, flags2);
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cpu.family = (flags1 >> 8) & 0x0F;
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cpu.model = (flags1 >> 4) & 0x0F;
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cpu.rev = (flags1 >> 0) & 0x0F;
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cpu.type = (flags1 >>12) & 0x0F;
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cpu.extModel= (flags1 >>16) & 0x0F;
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cpu.extFamily=(flags1 >>20) & 0xFF;
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cpu.brandID = (flags3 >> 0) & 0xFF;
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// 4. If bit 23 of the standard feature flags is set to 1, MMX technology is supported.
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has_mmx = testBit(flags2,23);
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has_sse = testBit(flags2,25);
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has_sse2 = testBit(flags2,26);
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has_sseOS = sseOSsupport();
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//6. Execute CPUID extended function 8000_0000h.
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// This function returns the highest extended function supported in EAX.
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CPUID_X86(EXT_CMD, cpu.max_extFunc, dummy, dummy, dummy);
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cpu.max_extFunc -= (EXT_CMD);
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cpuidLookup(); // Get official company names & CPU names
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cpuidName();
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cpuMhz = calcOurMhz();
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//7. Execute CPUID function 8000_0001h. This function returns the extended feature flags in EDX
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if(cpu.max_extFunc >= 1) {
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CPUID_X86(EXT_CMD + 1, dummy, dummy, dummy, flags2);
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switch(cpu.vendor) {
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case _AMD:
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has_3Dnow = testBit(flags2,31); //8. If bit 31 of ...is set to 1, 3DNow! supported
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has_3DnowPlus=testBit(flags2,30); //10. If bit 30 of...is set to 1, 3DNow! additions supported
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has_mmxPlus =testBit(flags2,22);
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break;
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default:
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break;
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}
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}
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getCacheSizes();
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}
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//
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// getCacheSizes - Determine if CPUID is available
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//
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void CPU_INFO_t::getCacheSizes(void) {
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UINT32 cacheBits[4] = { 0, 0, 0, 0 };
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int theSize, codeN, dataN, cache1N, cache2N, cache3N, line;
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cache.code = codeN = 0;
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cache.data = dataN = 0;
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cache.L1 = cache1N = 0;
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cache.L2 = cache2N = 0;
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cache.L3 = cache3N = 0;
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if (cpu.max_extFunc >= 5) {
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CPUID_X86(EXT_CMD + 5, cacheBits[0], cacheBits[1], cacheBits[2], cacheBits[3]);
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theSize = (cacheBits[2] >>24) & 0xFF;
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theSize += (cacheBits[3] >>24) & 0xFF;
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cache.L1 = theSize;
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cache.line_size = cacheBits[3] & 0xFF;
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}
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if (cpu.max_extFunc >= 6) {
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CPUID_X86(EXT_CMD + 6, cacheBits[0], cacheBits[1], cacheBits[2], cacheBits[3]);
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cache.L2 = (cacheBits[3] >>16) & 0xFFFF;
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}
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if ( cache.L1 + cache.L2 == 0)
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if ( cpu.vendor == _INTEL && cpu.max_stdFunc >= 2) {
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CPUID_X86(2, cacheBits[0], cacheBits[1], cacheBits[2], cacheBits[3]);
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_uint8 *bytePtr = (_uint8 *) &cacheBits;
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for(int x = 0 ; x < sizeof(cacheBits); x ++, bytePtr++) {
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if( x % 4 == 0) continue;
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for(int y = 0; cacheCodes[y].idByte != 0xFF; y++) {
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if(*bytePtr != cacheCodes[y].idByte)
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continue;
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cache.L1 += cacheCodes[y].L1;
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cache.L2 += cacheCodes[y].L2;
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cache.L3 += cacheCodes[y].L3;
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cache.code += cacheCodes[y].code;
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cache.data += cacheCodes[y].data;
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if( cacheCodes[y].line > cache.line_size)
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cache.line_size = cacheCodes[y].line;
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}
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}
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if( cache.L1 + cache.L2 == 0) // Still no official cache?
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cache.L1 = cache.code + cache.data;
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}
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}
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//
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// checkCpuidOpcode - Determine if CPUID is available
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//
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void CPU_INFO_t::checkCpuidOpcode(void) {
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UINT32 CPUID_valid;
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has_cpuid_opcode = true;
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return;
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#if defined(__GNUC__)
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asm ("\n\t sti \n\t pushfd \n\t pop %%eax \n\t mov %%edx,%%eax \n\t xor %%eax, 0x0200000" \
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"\n\t push %%eax \n\t popfd \n\t pushfd \n\t pop %%eax \n\t cli \n\t xor %%eax, %%edx"
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:
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: "a" (CPUID_valid) );
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#else
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_asm {
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sti
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pushfd ; save EFLAGS to stack.
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pop eax ; store EFLAGS in eax.
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mov edx, eax ; save in edx for testing later.
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xor eax, 0200000h ; switch bit 21.
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push eax ; copy "changed" value to stack.
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popfd ; save "changed" eax to EFLAGS.
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pushfd
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cli
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pop eax
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xor eax, edx ; See if bit changeable.
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mov CPUID_valid, eax ; Save the value in eax to a variable.
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}
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#endif
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has_cpuid_opcode = ( CPUID_valid != 0);
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}
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#if defined(__GNUC__)
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#define fxsave(addr) asm("fxsave %0" : "=m" (addr))
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#define fxrstor(addr) asm("fxrstor %0" : "=m" (addr))
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#define testOrps() asm("orps xmm1, xmm1");
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#endif
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#if defined(_MSC_VER)
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#define fxsave(addr) __asm{ fxsave addr }
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#define fxrstor(addr) __asm{ fxrstor addr }
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#define testOrps() __asm{ orps xmm1, xmm1 }
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#endif
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//======================
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//
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// sseOSsupport - Check for OS support of SSE instruction
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//
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bool CPU_INFO_t::sseOSsupport(void) {
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if(!has_sse) return false;
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try { testOrps(); }
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catch(int err) { return false; }
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return true;
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}
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/*
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char fxSaveBuf[512+32], *fxSavePtr;
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int *xmm6Reg = (int *) &fxSaveBuf[0x10C];
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int testVal = 'BenH', save1, save2, save3;
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fxSavePtr = (char*)((int)(fxSaveBuf+15) & ~15);
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fxsave(fxSavePtr); // Save it
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save1 = *xmm6Reg; // Save original value
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*xmm6Reg ^= testVal;
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fxrstor(fxSavePtr); // Update xmm6 (if possible)
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save2 = *xmm6Reg;
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fxsave(fxSavePtr); // Save it
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save3 = *xmm6Reg;
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*xmm6Reg = save1;
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fxrstor(fxSavePtr); // Put back original value
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return ( save2 ^ save3 == testVal);
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*/
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//===============================
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//
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// cpuidLookup - Find system details with info from cpuid
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//
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void CPU_INFO_t::cpuidLookup(void) {
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CPUID_DEFS *idDef;
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bool found = false;
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for( idDef = cpuid_tbl; !found ; idDef++) {
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// Find a vendor entry [0,0,0,0]
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while(idDef->family + idDef->model + idDef->xFamily + idDef->xModel)
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idDef++;
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// End of list marker?
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if( idDef->cacheL2 == -1)
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break;
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// Vendor code name match?
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// Table Name format: "[" + <vendorStr> + "]"
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if( strncmp (vendor.id.name, &idDef->name.normal[1], 12) != 0)
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continue;
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cpu.vendor = idDef->cacheL2;
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vendor.abrvName = idDef->name.abrv;
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vendor.company = idDef->name.nick;
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// Special case... _AMD & _TMT have 2 vendor.id.name types
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// so if name matched first, skip the 2nd
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if(idDef->cacheL2 == idDef[1].cacheL2)
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idDef++;
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// Now find Family/Model match
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for(idDef++ ; !found && idDef->family; idDef++) {
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if(idDef->family < cpu.family || idDef->model < cpu.model)
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continue;
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if(idDef->xFamily > 0 && idDef->xFamily < cpu.extFamily)
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continue;
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if(idDef->xModel > 0 && idDef->xModel < cpu.extModel) // extModel used?
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continue;
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if(idDef->brand > 0 && idDef->brand < cpu.brandID) // Brand matters?
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continue;
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if(idDef->cacheL2 > 0 && idDef->cacheL2 < cache.L2) // Cache matters?
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continue;
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found = true;
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name.normal = idDef->name.normal;
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name.abrv = idDef->name.abrv;
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name.nick = idDef->name.nick;
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}
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}
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}
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//===============================
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//
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// cpuidName - Get supplied name from cpuid
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//
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void CPU_INFO_t::cpuidName(void) {
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name.fromID[0] = '\0'; // Terminate name
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if (cpu.max_extFunc <4)
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return;
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// Prepare to build the name from a series of 32 bit words
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_uint32 *namePtr = (_uint32 *)&name.fromID;
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CPUID_X86(EXT_CMD + 2, namePtr[0], namePtr[1], namePtr[2], namePtr[3]);
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CPUID_X86(EXT_CMD + 3, namePtr[4], namePtr[5], namePtr[6], namePtr[7]);
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CPUID_X86(EXT_CMD + 4, namePtr[8], namePtr[9], namePtr[10], namePtr[11]);
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name.fromID[12*4] = '\0'; // Terminate name
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strip_whitespace(name.fromID); // trim whitespace [>_INTEL<]
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}
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#include <time.h>
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#include <winbase.h>
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const unsigned int million = 1000000;
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double calcFreq(int num_tics);
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_uint32 calcOurMhz(void) {
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double avgFreq, currFreq, tmp, avgDev, wantedDev;
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_int32 loops;
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wantedDev = 1.0;
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avgFreq = calcFreq(50);
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loops = 0;
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do {
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currFreq=calcFreq(50);
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avgFreq =(currFreq+avgFreq)/2;
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// Work out the current average deviation of the frequency.
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tmp += fabs(currFreq-avgFreq);
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avgDev = tmp/++loops;
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} while( loops < 25 && avgDev > wantedDev);
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return avgFreq/million;
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}
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//
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//
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//
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double calcFreq(int num_tics) {
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clock_t start, begin, end, goal;
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_int64 timer1, timer2;
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start = clock();
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goal = start + num_tics + 1;
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while( clock() == start) // wait for leading edge change
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;
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timer1 = cycleCount();
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do {
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end = clock();
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} while( end < goal);
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timer2 = cycleCount();
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return double(CLOCKS_PER_SEC)/(end-start-1)*4/3
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* (timer2-timer1);
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}
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const char *BOINC_RCSID_4f1d3f9017 = "$Id$";
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