ADDV	$8, R20
	MOVV	R30, (R21)
	ADDV	$8, R21

	MOVV	(R20), R30
	ADDV	$8, R20
	MOVV	R30, (R21)
	ADDV	$8, R21

	MOVV	(R20), R30
	ADDV	$8, R20
	MOVV	R30, (R21)
	ADDV	$8, R21

	MOVV	(R20), R30
	ADDV	$8, R20
	MOVV	R30, (R21)
	ADDV	$8, R21

	MOVV	(R20), R30
	ADDV	$8, R20
	MOVV	R30, (R21)
	ADDV	$8, R21

	MOVV	(R20), R30
	ADDV	$8, R20
	MOVV	R30, (R21)

	CCMNW EQ, R20, R6, $6                      // 8602463a
	CCMN LE, R30, R12, $6                      // c6d34cba
	CCMPW VS, R29, $15, $7                     // a76b4f7a
	CCMP LE, R7, $19, $3                       // e3d853fa
	CCMPW HS, R19, R6, $0                      // 6022467a
	CCMP LT, R30, R6, $7                       // c7b346fa
	CCMN  MI, ZR, R1, $4                       // e44341ba

	p(mov + " (R3), R30")              // load PC to REGTMP
	p(add+" $%d, R3", l.stack+regsize) // pop frame (including the space pushed by sigctxt.pushCall)
	p("JMP (R30)")
}

func genPPC64() {
	// Add integer registers R3-R29
	// R0 (zero), R1 (SP), R30 (g) are special and not saved here.

// of constant-sized-frame functions to encode a few bits of size in the pc.
// Caution: ugly multiline assembly macros in your future!

#define DISPATCH(NAME,MAXSIZE)		\
	MOVV	$MAXSIZE, R30;		\
	SGTU	R19, R30, R30;		\
	BNE	R30, 3(PC);			\
	MOVV	$NAME(SB), R4;	\
	JMP	(R4)
// Note: can't just "BR NAME(SB)" - bad inlining results.

TEXT ·reflectcall(SB), NOSPLIT|NOFRAME, $0-48
	MOVWU frameSize+32(FP), R19

	register["FPSCR"] = ppc64.REG_FPSCR
	register["MSR"] = ppc64.REG_MSR
	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP
	register["PC"] = RPC
	// Avoid unintentionally clobbering g using R30.
	delete(register, "R30")
	register["g"] = ppc64.REG_R30
	registerPrefix := map[string]bool{
		"CR":  true,
		"F":   true,
		"R":   true,
		"SPR": true,
	}

	instructions := make(map[string]obj.As)

	{"$argframe+0(FP)", "$argframe(FP)"},
	{"$asmcgocall<>(SB)", "$asmcgocall<>(SB)"},
	{"EQ", "EQ"},
	{"F29", "F29"},
	{"F3", "F3"},
	{"F30", "F30"},
	{"g", "g"},
	{"LR", "R30"},
	{"(LR)", "(R30)"},
	{"R0", "R0"},
	{"R10", "R10"},
	{"R11", "R11"},
	{"R18_PLATFORM", "R18"},
	{"$4503601774854144.0", "$(4503601774854144.0)"},
	{"$runtime·badsystemstack(SB)", "$runtime.badsystemstack(SB)"},

	// and the first match is chosen.
	// The more specific class needs to come earlier.
	C_NONE   = iota + 1 // starting from 1, leave unclassified Addr's class as 0
	C_REG               // R0..R30
	C_ZREG              // R0..R30, ZR
	C_RSP               // R0..R30, RSP
	C_FREG              // F0..F31
	C_VREG              // V0..V31
	C_PAIR              // (Rn, Rm)
	C_SHIFT             // Rn<<2
	C_EXTREG            // Rn.UXTB[<<3]

	"R11",
	"R12",
	"R13",
	"R14",
	"R15",
	"R16",
	"R17",
	"R18",
	"R19",
	"R20",
	"R21",
	"g", // aka R22
	"R23",
	"R24",
	"R25",
	"R26",
	"R27",
	"R28",
	"R29",
	// R30 is REGTMP not used in regalloc
	"R31",

	"F0",
	"F1",
	"F2",
	"F3",
	"F4",
	"F5",
	"F6",
	"F7",
	"F8",
	"F9",
	"F10",
	"F11",
	"F12",
	"F13",
	"F14",
	"F15",
	"F16",

	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVD	0(R26), R3	// code pointer
	MOVD.P	16(RSP), R30	// restore LR
	SUB	$8, RSP, R29	// restore FP
	B	(R3)

// func switchToCrashStack0(fn func())
TEXT runtime·switchToCrashStack0<ABIInternal>(SB), NOSPLIT, $0-8
	MOVD	R0, R26    // context register

// The race ctx is passed in R3 and loaded in
// racecalladdr.
//
// The sequence used to get the race ctx:
//    MOVD    runtime·tls_g(SB), R10 // Address of TLS variable
//    MOVD    0(R10), g              // g = R30
//    MOVD    g_racectx(g), R3       // racectx == ThreadState

// func runtime·RaceRead(addr uintptr)
// Called from instrumented Go code
TEXT	runtime·raceread<ABIInternal>(SB), NOSPLIT, $0-8
	MOVD	R3, R4 // addr