SBBL $(delta >> 32), DX

	// nano/100 = DX:AX
	// split into two decimal halves by div 1e9.
	// (decimal point is two spots over from correct place,
	// but we avoid overflow in the high word.)
	MOVL	$1000000000, CX
	DIVL	CX
	MOVL	AX, DI
	MOVL	DX, SI

	// DI = nano/100/1e9 = nano/1e11 = sec/100, DX = SI = nano/100%1e9
	// split DX into seconds and nanoseconds by div 1e7 magic multiply.
	MOVL	DX, AX
	MOVL	$1801439851, CX
	MULL	CX

	ADDL	AX, BX
	ADCL	$0, DX
	MOVL	BX, 4(CX)
	MOVL	DX, AX
	MOVL	AX, hi32+16(FP)
	RET

TEXT runtime·_div64by32(SB), NOSPLIT, $0
	MOVL	r+12(FP), CX
	MOVL	a_lo+0(FP), AX
	MOVL	a_hi+4(FP), DX
	DIVL	b+8(FP)
	MOVL	DX, 0(CX)
	MOVL	AX, q+16(FP)

	MOVL	$-1, ret_hi+8(FP)
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$8-12
	CALL	runtime·nanotime1(SB)
	MOVL	0(SP), AX
	MOVL	4(SP), DX

	MOVL	$1000000000, CX
	DIVL	CX
	MOVL	AX, sec_lo+0(FP)
	MOVL	$0, sec_hi+4(FP)
	MOVL	DX, nsec+8(FP)
	RET

TEXT runtime·notify(SB),NOSPLIT,$0
	MOVL	$28, AX
	INT	$64
	MOVL	AX, ret+4(FP)
	RET

	CLD

	// determine index into runtime·cbs table
	SUBL	$runtime·callbackasm(SB), AX
	MOVL	$0, DX
	MOVL	$5, BX	// divide by 5 because each call instruction in runtime·callbacks is 5 bytes long
	DIVL	BX
	SUBL	$1, AX	// subtract 1 because return PC is to the next slot

	// Create a struct callbackArgs on our stack.
	SUBL	$(12+callbackArgs__size), SP
	MOVL	AX, (12+callbackArgs_index)(SP)		// callback index

	MOVL	$SYS_sigaltstack, AX
	INT	$0x80
	JAE	2(PC)
	MOVL	$0xf1, 0xf1  // crash
	RET

TEXT runtime·usleep(SB),NOSPLIT,$20
	MOVL	$0, DX
	MOVL	usec+0(FP), AX
	MOVL	$1000000, CX
	DIVL	CX
	MOVL	AX, 12(SP)		// tv_sec
	MOVL	$1000, AX
	MULL	DX
	MOVL	AX, 16(SP)		// tv_nsec

	MOVL	$0, 0(SP)
	LEAL	12(SP), AX
	MOVL	AX, 4(SP)		// arg 1 - rqtp
	MOVL	$0, 8(SP)		// arg 2 - rmtp

	// determine index into runtime·cbs table
	MOVQ	$runtime·callbackasm(SB), DX
	SUBQ	DX, AX
	MOVQ	$0, DX
	MOVQ	$5, CX	// divide by 5 because each call instruction in runtime·callbacks is 5 bytes long
	DIVL	CX
	SUBQ	$1, AX	// subtract 1 because return PC is to the next slot

	// Switch from the host ABI to the Go ABI.
	PUSH_REGS_HOST_TO_ABI0()

	// Create a struct callbackArgs on our stack to be passed as

	SYSCALL
	BEQ	R7, 2(PC)
	SUBVU	R2, R0, R2	// caller expects negative errno
	MOVW	R2, ret+24(FP)
	RET

TEXT runtime·usleep(SB),NOSPLIT,$24-4
	MOVWU	usec+0(FP), R3
	MOVV	R3, R5
	MOVW	$1000000, R4
	DIVVU	R4, R3
	MOVV	LO, R3
	MOVV	R3, 8(R29)		// tv_sec
	MOVW	$1000, R4
	MULVU	R3, R4
	MOVV	LO, R4
	SUBVU	R4, R5
	MOVV	R5, 16(R29)		// tv_nsec

	ADDV	$8, R29, R4		// arg 1 - rqtp
	MOVV	$0, R5			// arg 2 - rmtp

	INT	$0x80
	JAE	2(PC)
	NEGL	AX			// caller expects negative errno
	MOVL	AX, ret+12(FP)
	RET

TEXT runtime·usleep(SB),NOSPLIT,$24
	MOVL	$0, DX
	MOVL	usec+0(FP), AX
	MOVL	$1000000, CX
	DIVL	CX
	MOVL	AX, 12(SP)		// tv_sec - l32
	MOVL	$0, 16(SP)		// tv_sec - h32
	MOVL	$1000, AX
	MULL	DX
	MOVL	AX, 20(SP)		// tv_nsec

	MOVL	$0, 0(SP)
	LEAL	12(SP), AX
	MOVL	AX, 4(SP)		// arg 1 - rqtp

	MOVQ	old+8(FP), SI
	MOVQ	$53, AX
	SYSCALL
	JCC	2(PC)
	MOVL	$0xf1, 0xf1  // crash
	RET

TEXT runtime·usleep(SB),NOSPLIT,$16
	MOVL	$0, DX
	MOVL	usec+0(FP), AX
	MOVL	$1000000, CX
	DIVL	CX
	MOVQ	AX, 0(SP)		// tv_sec
	MOVL	$1000, AX
	MULL	DX
	MOVQ	AX, 8(SP)		// tv_nsec

	MOVQ	SP, DI			// arg 1 - rqtp
	MOVQ	$0, SI			// arg 2 - rmtp
	MOVL	$240, AX		// sys_nanosleep
	SYSCALL
	RET

	SYSCALL
	BEQ	R7, 2(PC)
	SUBU	R2, R0, R2	// caller expects negative errno
	MOVW	R2, errno+12(FP)
	RET

TEXT runtime·usleep(SB),NOSPLIT,$28-4
	MOVW	usec+0(FP), R3
	MOVW	R3, R5
	MOVW	$1000000, R4
	DIVU	R4, R3
	MOVW	LO, R3
	MOVW	R3, 24(R29)
	MOVW	$1000, R4
	MULU	R3, R4
	MOVW	LO, R4
	SUBU	R4, R5
	MOVW	R5, 28(R29)

	// nanosleep(&ts, 0)
	ADDU	$24, R29, R4
	MOVW	$0, R5