// When enabled is false, all functions in this package panic.
//
// BoringCrypto is only available on linux/amd64 and linux/arm64 systems.
const Enabled = available

// A BigInt is the raw words from a BigInt.
// This definition allows us to avoid importing math/big.
// Conversion between BigInt and *big.Int is in crypto/internal/boring/bbig.

	"strings"
)

// A BitField is a bit-field in a 32-bit word.
// Bits are counted from 0 from the MSB to 31 as the LSB.
type BitField struct {
	Offs uint8 // the offset of the left-most bit.
	Bits uint8 // length in bits.
	// This instruction word holding this field.
	// It is always 0 for ISA < 3.1 instructions. It is
	// in decoding order. (0 == prefix, 1 == suffix on ISA 3.1)
	Word uint8
}

func (b BitField) String() string {

	word := uint32(v) << ((uaddr & 3) * 8) // little endian
	for {
		old := *addr32
		if Cas(addr32, old, old|word) {
			return
		}
	}
}

//go:nosplit
func And8(addr *uint8, v uint8) {
	// Align down to 4 bytes and use 32-bit CAS.
	uaddr := uintptr(unsafe.Pointer(addr))
	addr32 := (*uint32)(unsafe.Pointer(uaddr &^ 3))
	word := uint32(v) << ((uaddr & 3) * 8)    // little endian

	MOVD  8(R8), R11
	MOVD  8(R9), R16
	SUBE  R16, R11, R20
	MOVD  R20, 8(R10)

final:
	ADDZE R4
	XOR   $1, R4

done:
	MOVD  R4, c+72(FP)
	RET

// func addVW(z, x []Word, y Word) (c Word)
TEXT ·addVW(SB), NOSPLIT, $0
	MOVD z+0(FP), R10	// R10 = z[]
	MOVD x+24(FP), R8	// R8 = x[]
	MOVD y+48(FP), R4	// R4 = y = c
	MOVD z_len+8(FP), R11	// R11 = z_len

	short = flag.Bool("short", false, "only print first 10 digits of result")
)

// A large natural number is represented by a nat, each "digit" is
// a big.Word; the value zero corresponds to the empty nat slice.
type nat []big.Word

const W = 1 << (5 + ^big.Word(0)>>63) // big.Word size in bits

// The following methods are extracted from math/big to make this a
// stand-alone program that can easily be run without dependencies

    $("#numSearchOption").prop("selectedIndex", 0);
    return false;
  });

  if (typeof $.fn.suggestor === "function") {
    $("#query").suggestor({
      ajaxinfo: {
        url: contextPath + "/api/v1/suggest-words",
        fn: ["_default", "content", "title"],
        num: 10,
        lang: $("#langSearchOption").val()
      },
      boxCssInfo: {
        border: "1px solid rgba(82, 168, 236, 0.5)",

	`[:punct:]`:   {+1, code13},
	`[:^punct:]`:  {-1, code13},
	`[:space:]`:   {+1, code14},
	`[:^space:]`:  {-1, code14},
	`[:upper:]`:   {+1, code15},
	`[:^upper:]`:  {-1, code15},
	`[:word:]`:    {+1, code16},
	`[:^word:]`:   {-1, code16},
	`[:xdigit:]`:  {+1, code17},
	`[:^xdigit:]`: {-1, code17},

// If x == 0, the result is -1.
func log2(x Word) int {
	return bits.Len(uint(x)) - 1
}

func itoa(x nat, base int) []byte {
	// special cases
	switch {
	case base < 2:
		panic("illegal base")
	case len(x) == 0:
		return []byte("0")
	}

	// allocate buffer for conversion
	i := x.bitLen()/log2(Word(base)) + 1 // +1: round up
	s := make([]byte, i)

	// don't destroy x

import "internal/cpu"

// amd64 assembly uses ADCX/ADOX/MULX if ADX is available to run two carry
// chains in the flags in parallel across the whole operation, and aggressively
// unrolls loops. arm64 processes four words at a time.
//
// It's unclear why the assembly for all other architectures, as well as for
// amd64 without ADX, perform better than the compiler output.
// TODO(filippo): file cmd/compile performance issue.

                } catch (final SuggesterException e) {
                    logger.warn("Failed to generate popular words.", e);
                }

                return wordList;
            });
        } catch (final ExecutionException e) {
            logger.warn("Failed to load popular words.", e);
        }
        return Collections.emptyList();
    }

    public void clearCache() {