git: 9front

ref: b0ab2a2ded1ecfcf5ad17d2016870a5431b6e805
dir: /sys/src/ape/lib/ap/386/cycles.s/

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#define RDTSC 		BYTE $0x0F; BYTE $0x31

TEXT _cycles(SB),1,$0		/* time stamp counter; cycles since power up */
	RDTSC
	MOVL	vlong+0(FP), CX	/* &vlong */
	MOVL	AX, 0(CX)	/* lo */
	MOVL	DX, 4(CX)	/* hi */
	RET