salign = 1
	case "darwin", "ios", "illumos", "solaris":
		// NOTE: It seems like 64-bit Darwin, Illumos and Solaris
		// kernels still require 32-bit aligned access to network
		// subsystem.
		if sizeofPtr == 8 {
			salign = 4
		}
	case "netbsd", "openbsd":
		// NetBSD and OpenBSD armv7 require 64-bit alignment.
		if runtime.GOARCH == "arm" {
			salign = 8
		}
		// NetBSD aarch64 requires 128-bit alignment.

TEXT runtime·memclrNoHeapPointers<ABIInternal>(SB),NOSPLIT,$0-16
	ADDV	R4, R5, R6

	// if less than 8 bytes, do one byte at a time
	SGTU	$8, R5, R8
	BNE	R8, out

	// do one byte at a time until 8-aligned
	AND	$7, R4, R8
	BEQ	R8, words
	MOVB	R0, (R4)
	ADDV	$1, R4
	JMP	-4(PC)

words:
	// do 8 bytes at a time if there is room
	ADDV	$-7, R6, R5

	PCALIGN	$16
	SGTU	R5, R4, R8
	BEQ	R8, out

		// addr be page-aligned, and allows length to be zero.
		throw("unaligned sysNoHugePageOS")
	}
	madvise(v, n, _MADV_NOHUGEPAGE)
}

func sysHugePageCollapseOS(v unsafe.Pointer, n uintptr) {
	if uintptr(v)&(physPageSize-1) != 0 {
		// The Linux implementation requires that the address
		// addr be page-aligned, and allows length to be zero.
		throw("unaligned sysHugePageCollapseOS")
	}

	// nil pointer is always suitably aligned (#47430).
	if p == nil {
		return
	}

	// Check that (*[n]elem)(p) is appropriately aligned.
	// Note that we allow unaligned pointers if the types they point to contain
	// no pointers themselves. See issue 37298.
	// TODO(mdempsky): What about fieldAlign?
	if elem.Pointers() && uintptr(p)&(uintptr(elem.Align_)-1) != 0 {
		throw("checkptr: misaligned pointer conversion")

		salign = 1
	case "darwin", "ios", "illumos", "solaris":
		// NOTE: It seems like 64-bit Darwin, Illumos and Solaris
		// kernels still require 32-bit aligned access to network
		// subsystem.
		if SizeofPtr == 8 {
			salign = 4
		}
	case "netbsd", "openbsd":
		// NetBSD and OpenBSD armv7 require 64-bit alignment.
		if runtime.GOARCH == "arm" {
			salign = 8
		}
		// NetBSD aarch64 requires 128-bit alignment.

	// nothing else allocates from it.
	runtime.Acquirem()

	// Make 1-byte allocations until we get a fresh tiny slot.
	aligned := false
	for i := 0; i < 16; i++ {
		x := runtime.Escape(new(byte))
		if uintptr(unsafe.Pointer(x))&0xf == 0xf {
			aligned = true
			break
		}
	}
	if !aligned {
		runtime.Releasem()
		t.Fatal("unable to get a fresh tiny slot")
	}

	// Create a 4-byte object so that the current

	for i := 1; i <= 15; i++ {
		r := recur(0, int64(i))

		// Print r both as a fraction and as a floating-point number.
		// Since big.Rat implements fmt.Formatter, we can use %-13s to
		// get a left-aligned string representation of the fraction.
		fmt.Printf("%-13s = %s\n", r, r.FloatString(8))
	}

	// Output:
	// 2/1           = 2.00000000
	// 3/1           = 3.00000000
	// 8/3           = 2.66666667

entry:
	ADDV	R4, R14, R12	// R6 start of a, R14 end of a
	BEQ	R4, R12, samebytes // length is 0

	SRLV	$4, R14		// R14 is number of chunks
	BEQ	R0, R14, byte_loop

	// make sure both a and b are aligned.
	OR	R4, R6, R15
	AND	$7, R15
	BNE	R0, R15, byte_loop

	PCALIGN	$16
chunk16_loop:
	BEQ	R0, R14, byte_loop
	MOVV	(R4), R8
	MOVV	(R6), R9
	BNE	R8, R9, byte_loop
	MOVV	8(R4), R16
	MOVV	8(R6), R17

	CMP   R4, $512
	BLT   under512           // special case for < 512
	ANDCC $127, R3, R8       // check for 128 alignment of address
	BEQ   zero512setup

	ANDCC $7, R3, R15
	BEQ   zero512xsetup // at least 8 byte aligned

	// zero bytes up to 8 byte alignment

	ANDCC $1, R3, R15 // check for byte alignment
	BEQ   byte2
	MOVB  R0, 0(R3)   // zero 1 byte
	ADD   $1, R3      // bump ptr by 1
	ADD   $-1, R4

byte2:

    TF_DataType, const int64_t* dims, int num_dims, void* data, size_t len,
    void (*deallocator)(void* data, size_t len, void* arg),
    void* deallocator_arg);

// Returns the alignment, in bytes, required for allocating aligned tensors.
//
// This can be used in combination with TF_NewTensor to manually manage
// memory while ensuring the resulting tensors satisfy TensorFlow's
// memory alignment preferences.