91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
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#include "../qcommon/q_shared.h"
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#include "../qcommon/qcommon.h"
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#ifdef MACOS_X
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void Sys_GetCpuInfo( cpuInfo_t *cpuInfo )
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{
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Com_Memset( cpuInfo, 0, sizeof( cpuInfo_t ) );
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}
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#else
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cpuInfo_t cpuInfo;
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void __cpuid(int *regs, int ax)
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{
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__asm__ (
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"pushal\n"
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"mov %0, %%eax\n"
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"cpuid\n"
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"movl %%eax, 0( %1 )\n"
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"movl %%ebx, 4( %1 )\n"
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"movl %%ecx, 8( %1 )\n"
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"movl %%edx, 12( %1 )\n"
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"popal\n"
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: : "a"(ax), "D"( (int*)regs ) : "memory"
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);
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}
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void Sys_GetCpuInfo( cpuInfo_t *cpuInfo )
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{
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byte canCpuid;
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int info[4];
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Com_Memset( cpuInfo, 0, sizeof( cpuInfo_t ) );
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//detect whether we can run CUPID
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asm("pushfl\n");
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asm("pushfl\n");
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asm("pop %eax\n");
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asm("mov %eax, %ecx\n");
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asm("xor $0x200000, %eax\n");
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asm("push %eax\n");
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asm("popfl\n");
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asm("pushfl\n");
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asm("pop %eax\n");
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asm("popfl\n");
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asm("xor %ecx, %eax\n");
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asm("setnz %0\n" : "=r"(canCpuid) : : "memory");
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if( !canCpuid )
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//can't get more info, leave everything disabled
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return;
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__cpuid( info, 1 );
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if( info[3] & (1 << 23) )
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cpuInfo->mmx.enabled = qtrue;
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if( info[3] & (1 << 24) )
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cpuInfo->fxsr = qtrue;
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if( info[3] & (1 << 25) )
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{
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cpuInfo->sse.enabled = qtrue;
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//find out if we can use DAZ
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if( cpuInfo->fxsr )
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{
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byte tmp[512] __attribute__( ( aligned( 16 ) ) );
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byte *tmp2 = tmp;
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uint mxcsr_mask;
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Com_Memset( tmp, 0, sizeof( tmp ) );
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asm(" fxsave (%0)" : "=a"(tmp2) : : "memory");
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mxcsr_mask = *(uint*)(tmp + 28);
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if( !mxcsr_mask )
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mxcsr_mask = 0xFFBF;
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cpuInfo->sse.mxcsr_mask = mxcsr_mask;
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cpuInfo->sse.hasDAZ = (mxcsr_mask & (1 << 6)) ? qtrue : qfalse;
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}
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}
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if( info[3] & (1 << 26) )
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cpuInfo->sse2.enabled = qtrue;
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}
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#endif
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