func (x *ctr) refill() {
	remain := len(x.out) - x.outUsed
	copy(x.out, x.out[x.outUsed:])
	x.out = x.out[:cap(x.out)]
	bs := x.b.BlockSize()
	for remain <= len(x.out)-bs {
		x.b.Encrypt(x.out[remain:], x.ctr)
		remain += bs

		// Increment counter
		for i := len(x.ctr) - 1; i >= 0; i-- {
			x.ctr[i]++
			if x.ctr[i] != 0 {
				break
			}
		}
	}
	x.out = x.out[:remain]
	x.outUsed = 0
}

	MOVD 0(R19), R0
	MOVD R2, 40(R1)
	MOVD 8(R19), R2
	MOVD R18, R3
	MOVD R0, CTR
	BL (CTR) // Return to AIX loader

	// Launch rt0_go
	MOVD 40(R1), R2
	MOVD R14, R3 // argc
	MOVD R15, R4 // argv
	BL _main(SB)


DEFINE_PPC64X_FUNCDESC(main, _main)
TEXT _main(SB),NOSPLIT,$-8
	MOVD $runtime·rt0_go(SB), R12
	MOVD R12, CTR
	BR (CTR)


TEXT _rt0_ppc64_aix_lib(SB),NOSPLIT,$-8

	}
	var ac aesctr
	ac.block = c
	ac.ctr[0] = byteorder.BeUint64(iv[0:]) // high bits
	ac.ctr[1] = byteorder.BeUint64(iv[8:]) // low bits
	ac.buffer = ac.storage[:0]
	return &ac
}

func (c *aesctr) refill() {
	// Fill up the buffer with an incrementing count.
	c.buffer = c.storage[:streamBufferSize]
	c0, c1 := c.ctr[0], c.ctr[1]
	for i := 0; i < streamBufferSize; i += 16 {

// it directly.
func (ctr *Counter) String() string {
	ctr.mu.Lock()
	defer ctr.mu.Unlock()
	return strconv.Itoa(ctr.n)
}

func (ctr *Counter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	ctr.mu.Lock()
	defer ctr.mu.Unlock()
	switch req.Method {
	case "GET":
		ctr.n++
	case "POST":
		var buf strings.Builder
		io.Copy(&buf, req.Body)

	// Synchronous initialization.
	MOVD	$runtime·libpreinit(SB), R12
	MOVD	R12, CTR
	BL	(CTR)

	// Create a new thread to do the runtime initialization and return.
	MOVD	_cgo_sys_thread_create(SB), R12
	CMP	$0, R12
	BEQ	nocgo
	MOVD	$_rt0_ppc64le_linux_lib_go(SB), R3
	MOVD	$0, R4
	MOVD	R12, CTR
	BL	(CTR)
	BR	done

nocgo:
	MOVD	$0x800000, R12                     // stacksize = 8192KB

	VLM   (R5), KEY0, KEY1
	VLL   R0, (R6), NONCE
	VZERO M0
	VLEIB $7, $32, M0
	VSRLB M0, NONCE, NONCE

	// initialize counter values
	VLREPF (R7), CTR
	VZERO  INC
	VLEIF  $1, $1, INC
	VLEIF  $2, $2, INC
	VLEIF  $3, $3, INC
	VAF    INC, CTR, CTR
	VREPIF $4, INC

chacha:
	VREPF $0, J0, X0
	VREPF $1, J0, X1
	VREPF $2, J0, X2
	VREPF $3, J0, X3
	VREPF $0, KEY0, X4
	VREPF $1, KEY0, X5

	XOR	R0, R0 // Note, newer kernels may not always set R0 to 0.
	MOVD	$runtime·rt0_go(SB), R12
	MOVD	R12, CTR
	MOVBZ	runtime·iscgo(SB), R5
	CMP	R5, $0
	BEQ	nocgo
	BR	(CTR)
nocgo:
	MOVD	0(R1), R3 // argc
	ADD	$8, R1, R4 // argv

	// Existing counter?
	var ctr *Counter
	for _, s := range c.stacks {
		if eq(s.pcs, pcs) {
			if s.counter != nil {
				ctr = s.counter
				break
			}
		}
	}

	if ctr == nil {
		// Create new counter.
		ctr = &Counter{
			name: EncodeStack(pcs, c.name),
			file: c.file,
		}
		c.stacks = append(c.stacks, stack{pcs: pcs, counter: ctr})
	}

	ctr.Inc()
}

#define REGISTER_NO_GRADIENT_OP(name) \
  REGISTER_GRADIENT_OP_UNIQ_HELPER(__COUNTER__, name, nullptr)

#define REGISTER_GRADIENT_OP_UNIQ_HELPER(ctr, name, fn) \
  REGISTER_GRADIENT_OP_UNIQ(ctr, name, fn)

#define REGISTER_GRADIENT_OP_UNIQ(ctr, name, fn) \
  static bool unused_ret_val_##ctr =             \
      ::tensorflow::ops::GradOpRegistry::Global()->Register(name, fn)

}  // namespace tensorflow

#include "textflag.h"

TEXT _rt0_ppc64_openbsd(SB),NOSPLIT,$0
	BR	main(SB)

TEXT main(SB),NOSPLIT,$-8
	// Make sure R0 is zero before _main
	XOR	R0, R0

	MOVD	$runtime·rt0_go(SB), R12
	MOVD	R12, CTR