(ROLQ x (MOV(Q|L)const [c])) => (ROLQconst [int8(c&63)] x)
(ROLL x (MOV(Q|L)const [c])) => (ROLLconst [int8(c&31)] x)
(ROLW x (MOV(Q|L)const [c])) => (ROLWconst [int8(c&15)] x)
(ROLB x (MOV(Q|L)const [c])) => (ROLBconst [int8(c&7) ] x)

(RORQ x (MOV(Q|L)const [c])) => (ROLQconst [int8((-c)&63)] x)
(RORL x (MOV(Q|L)const [c])) => (ROLLconst [int8((-c)&31)] x)
(RORW x (MOV(Q|L)const [c])) => (ROLWconst [int8((-c)&15)] x)

}

// PopulateABIInRegArgOps examines the entry block of the function
// and looks for incoming parameters that have missing or partial
// OpArg{Int,Float}Reg values, inserting additional values in
// cases where they are missing. Example:
//
//	func foo(s string, used int, notused int) int {
//	  return len(s) + used
//	}
//
// In the function above, the incoming parameter "used" is fully live,

		{`package u1c; type _ interface{~int}`, `~int`, `~int`},
		{`package u2c; type _ interface{int | string}`, `int | string`, `int | string`},
		{`package u3c; type _ interface{int | string | ~bool}`, `int | string | ~bool`, `int | string | ~bool`},
		{`package u3c; type _ interface{int | string | ~bool}`, `int | string`, `int | string`},
		{`package u3c; type _ interface{int | string | ~bool}`, `~bool`, `~bool`},

		}
	}
}

// addrToReg extracts the register from an Addr, handling special Addr.Names.
func addrToReg(a obj.Addr) int16 {
	switch a.Name {
	case obj.NAME_PARAM, obj.NAME_AUTO:
		return REG_SP
	}
	return a.Reg
}

// movToLoad converts a MOV mnemonic into the corresponding load instruction.
func movToLoad(mnemonic obj.As) obj.As {
	switch mnemonic {
	case AMOV:
		return ALD
	case AMOVB:

					// This relocation should point to a bctrl followed by a ld r2, 24(41)
					// Convert the bctrl into a bl.
					su := ldr.MakeSymbolUpdater(s)
					rewritetoinsn(&ctxt.Target, ldr, su, int64(r.Off()), 0xFFFFFFFF, OP_BCTRL, OP_BL)

					// Turn this reloc into an R_CALLPOWER, and convert the TOC restore into a nop.
					su.SetRelocType(i, objabi.R_CALLPOWER)
					localEoffset := int64(ldr.SymLocalentry(r.Sym()))

type ocmp []Optab

func (x ocmp) Len() int {
	return len(x)
}

func (x ocmp) Swap(i, j int) {
	x[i], x[j] = x[j], x[i]
}

func (x ocmp) Less(i, j int) bool {
	p1 := &x[i]
	p2 := &x[j]
	n := int(p1.as) - int(p2.as)
	if n != 0 {
		return n < 0
	}
	n = int(p1.from1) - int(p2.from1)
	if n != 0 {
		return n < 0
	}
	n = int(p1.reg) - int(p2.reg)
	if n != 0 {

//sys	EpollCreate1(flags int) (fd int, err error) = SYS_EPOLL_CREATE1
//sys	EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) = SYS_EPOLL_CTL
//sys	EpollPwait(epfd int, events []EpollEvent, msec int, sigmask *int) (n int, err error) = SYS_EPOLL_PWAIT
//sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_WAIT
//sys	Errno2() (er2 int) = SYS___ERRNO2

	// to be the return PC of cgocallback, so that the traceback
	// will seamlessly trace back into the earlier calls.
	MOVQ	m_curg(BX), SI
	MOVQ	SI, g(CX)
	MOVQ	(g_sched+gobuf_sp)(SI), DI  // prepare stack as DI
	MOVQ	(g_sched+gobuf_pc)(SI), BX
	MOVQ	BX, -8(DI)  // "push" return PC on the g stack
	// Gather our arguments into registers.
	MOVQ	fn+0(FP), BX
	MOVQ	frame+8(FP), CX
	MOVQ	ctxt+16(FP), DX

  // CHECK: %[[INP0:.*]] = "tf.ExpandDims"(%[[ARG0]], %[[AXIS]]) : (tensor<3x5xf32>, tensor<i64>) -> tensor<1x3x5xf32>
  // CHECK: %[[INP1:.*]] = "tf.ExpandDims"(%[[ARG1]], %[[AXIS]]) : (tensor<3x5xf32>, tensor<i64>) -> tensor<1x3x5xf32>
  // CHECK: "tf.ConcatV2"(%[[INP0]], %[[INP1]], %[[AXIS]]) : (tensor<1x3x5xf32>, tensor<1x3x5xf32>, tensor<i64>) -> tensor<2x3x5xf32>

(Ctz32 x) && buildcfg.GOPPC64<=8 => (POPCNTW (MOVWZreg (ANDN <typ.Int> (ADDconst <typ.Int> [-1] x) x)))
(Ctz32 x) => (CNTTZW (MOVWZreg x))
(Ctz16 x) => (POPCNTW (MOVHZreg (ANDN <typ.Int16> (ADDconst <typ.Int16> [-1] x) x)))
(Ctz8 x)  => (POPCNTB (MOVBZreg (ANDN <typ.UInt8> (ADDconst <typ.UInt8> [-1] x) x)))

(BitLen64 x) => (SUBFCconst [64] (CNTLZD <typ.Int> x))
(BitLen32 x) => (SUBFCconst [32] (CNTLZW <typ.Int> x))

(PopCount64 ...) => (POPCNTD ...)