| #include "textflag.h" | |
| // func cpu() uint64 | |
| TEXT ·cpu(SB),NOSPLIT,$0-8 | |
| MOVL $0x01, AX // version information | |
| MOVL $0x00, BX // any leaf will do | |
| MOVL $0x00, CX // any subleaf will do | |
| // call CPUID | |
| BYTE $0x0f | |
| BYTE $0xa2 | |
| SHRQ $24, BX // logical cpu id is put in EBX[31-24] | |
| MOVQ BX, ret+0(FP) | |
| RET |