shithub: bench9

ref: 42e3ee2d9508932863c789041c71b7ae6c813f49
dir: /b_amd64.s/

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#define RDTSCP WORD $0x010f; BYTE $0xf9

TEXT tstart(SB), 1, $0
	CPUID
	RDTSC
	MOVL AX, 0(RARG)
	MOVL DX, 4(RARG)
	RET

TEXT _tend(SB), 1, $0
	/* it needs MOVL CR0, AX; MOV AX, CR0 but it's userspace */
	RDTSC
	MOVL AX, 0(RARG)
	MOVL DX, 4(RARG)
	CPUID
	RET

TEXT _tendp(SB), 1, $0
	RDTSCP
	MOVL AX, 0(RARG)
	MOVL DX, 4(RARG)
	CPUID
	RET

TEXT cpuid(SB), 1, $0
	MOVL ax+8(FP), AX
	MOVL cx+16(FP), CX
	CPUID
	MOVL AX, 0(BP)
	MOVL BX, 4(BP)
	MOVL CX, 8(BP)
	MOVL DX, 12(BP)
	RET