MOVV	R10, 80(R29)
	MOVV	R11, 88(R29)
	MOVV	R12, 96(R29)
	MOVV	R13, 104(R29)
	MOVV	R14, 112(R29)
	MOVV	R15, 120(R29)
	MOVV	R16, 128(R29)
	MOVV	R17, 136(R29)
	MOVV	R18, 144(R29)
	MOVV	R19, 152(R29)
	// R20 already saved
	// R21 already saved.
	MOVV	R22, 160(R29)
	// R23 is tmp register.
	MOVV	R24, 168(R29)
	MOVV	R25, 176(R29)
	// R26 is reserved by kernel.
	// R27 is reserved by kernel.

	MOVV	runtime·vdsoClockgettimeSym(SB), R25
	BEQ	R25, fallback

	JAL	(R25)
	// see walltime for detail
	BEQ	R2, R0, finish
	MOVV	R0, runtime·vdsoClockgettimeSym(SB)
	MOVW	$1, R4 // CLOCK_MONOTONIC
	MOVV	$0(R29), R5
	JMP	fallback

finish:
	MOVV	0(R29), R3	// sec
	MOVV	8(R29), R5	// nsec

	MOVV	R16, R29	// restore SP
	// Restore vdsoPC, vdsoSP

	MOVW	R28, 96(R29)
	// R29 is SP.
	// R30 is g.
	// R31 is LR, which was saved by the prologue.

	CALL	runtime·wbBufFlush(SB)

	MOVW	4(R29), R20
	MOVW	8(R29), R21
	MOVW	12(R29), R3
	MOVW	16(R29), R4
	MOVW	20(R29), R5
	MOVW	24(R29), R6
	MOVW	28(R29), R7
	MOVW	32(R29), R8
	MOVW	36(R29), R9
	MOVW	40(R29), R10
	MOVW	44(R29), R11
	MOVW	48(R29), R12
	MOVW	52(R29), R13
	MOVW	56(R29), R14

	l.addSpecial(
		mov+" HI, R1\n"+mov+" R1, %d(R29)",
		mov+" %d(R29), R1\n"+mov+" R1, HI",
		regsize)
	l.addSpecial(
		mov+" LO, R1\n"+mov+" R1, %d(R29)",
		mov+" %d(R29), R1\n"+mov+" R1, LO",
		regsize)

	// Add floating point control/status register FCR31 (FCR0-FCR30 are irrelevant)
	var lfp = layout{sp: "R29", stack: l.stack}
	lfp.addSpecial(
		mov+" FCR31, R1\n"+mov+" R1, %d(R29)",
		mov+" %d(R29), R1\n"+mov+" R1, FCR31",

	MOVB R2, (R29)(R26)                        // a26b3a38
	MOVH R11, -80(R23)                         // eb021b78
	MOVH R11, (R27)(R14.SXTW<<1)               // 6bdb2e78
	MOVB R19, (R0)(R4)                         // 13682438
	MOVB R1, (R6)(R4)                          // c1682438
	MOVH R3, (R11)(R13<<1)                     // 63792d78
	//TODO STTR 55(R4), R29                    // 9d7803b8

	MOVV	$32, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier5<ABIInternal>(SB),NOSPLIT,$0
	MOVV	$40, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier6<ABIInternal>(SB),NOSPLIT,$0
	MOVV	$48, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier7<ABIInternal>(SB),NOSPLIT,$0
	MOVV	$56, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier8<ABIInternal>(SB),NOSPLIT,$0
	MOVV	$64, R29

	{"R19", "R19"},
	{"R2", "R2"},
	{"R20", "R20"},
	{"R21", "R21"},
	{"R22", "R22"},
	{"R23", "R23"},
	{"R24", "R24"},
	{"R25", "R25"},
	{"R26", "R26"},
	{"R27", "R27"},
	{"R28", "R28"},
	{"R29", "R29"},
	{"R3", "R3"},
	{"R31", "R31"},
	{"R4", "R4"},
	{"R5", "R5"},
	{"R6", "R6"},
	{"R7", "R7"},
	{"R8", "R8"},
	{"R9", "R9"},
	{"SPR(269)", "SPR(269)"},
	{"a(FP)", "a(FP)"},
	{"g", "g"},

	MOVD	(FIXED_FRAME+104)(R1), R17
	MOVD	(FIXED_FRAME+112)(R1), R29
	JMP	retry

TEXT runtime·gcWriteBarrier1<ABIInternal>(SB),NOSPLIT,$0
	MOVD	$8, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier2<ABIInternal>(SB),NOSPLIT,$0
	MOVD	$16, R29
	JMP	gcWriteBarrier<>(SB)
TEXT runtime·gcWriteBarrier3<ABIInternal>(SB),NOSPLIT,$0
	MOVD	$24, R29
	JMP	gcWriteBarrier<>(SB)

	MOVD	(g_sched+gobuf_sp)(g), R3
	MOVD	R3, RSP
	MOVD	(g_sched+gobuf_bp)(g), R29

	// call target function
	MOVD	0(R26), R3	// code pointer
	BL	(R3)

	// switch back to g
	MOVD	g_m(g), R3
	MOVD	m_curg(R3), g
	BL	runtime·save_g(SB)
	MOVD	(g_sched+gobuf_sp)(g), R0
	MOVD	R0, RSP
	MOVD	(g_sched+gobuf_bp)(g), R29
	MOVD	$0, (g_sched+gobuf_sp)(g)
	MOVD	$0, (g_sched+gobuf_bp)(g)
	RET

		// but clobbers R1 (LR) because it's a call
		// and R30 (REGTMP).
		// Returns a pointer to a write barrier buffer in R29.
		{name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: (callerSave &^ gpg) | buildReg("R1"), outputs: []regMask{buildReg("R29")}}, clobberFlags: true, aux: "Int64"},

		// There are three of these functions so that they can have three different register inputs.