if s[i+1] == c1 && Equal(s[i:i+n], sep) {
			return i
		}
		i++
		fails++
		if fails >= 4+i>>4 && i < t {
			// Give up on IndexByte, it isn't skipping ahead
			// far enough to be better than Rabin-Karp.
			// Experiments (using IndexPeriodic) suggest
			// the cutover is about 16 byte skips.
			// TODO: if large prefixes of sep are matching
			// we should cutover at even larger average skips,

	{"foofyfoobarfoobar", "y", 4},
	{"oooooooooooooooooooooo", "r", -1},
	{"oxoxoxoxoxoxoxoxoxoxoxoy", "oy", 22},
	{"oxoxoxoxoxoxoxoxoxoxoxox", "oy", -1},
	// test fallback to Rabin-Karp.
	{"000000000000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000001", 5},
}

var lastIndexTests = []BinOpTest{
	{"", "", 0},

  optional bool hostIPC = 13;

  // Specifies the hostname of the Carp
  // If not specified, the carp's hostname will be set to a system-defined value.
  // +optional
  optional string hostname = 16;

  // If specified, the fully qualified Carp hostname will be "<hostname>.<subdomain>.<carp namespace>.svc.<cluster domain>".
  // If not specified, the carp will not have a domainname at all.
  // +optional

    given-names: Jeffrey
  - family-names: Devin
    given-names: Matthieu
  - family-names: Ghemawat
    given-names: Sanjay
  - family-names: Goodfellow
    given-names: Ian
  - family-names: Harp
    given-names: Andrew
  - family-names: Irving
    given-names: Geoffrey
  - family-names: Isard
    given-names: Michael
  - family-names: Jozefowicz
    given-names: Rafal
  - family-names: Jia

pkg syscall (linux-arm-cgo), const ETH_P_802_3 ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_AARP ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_ALL ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_AOE ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_ARCNET ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_ARP ideal-int
pkg syscall (linux-arm-cgo), const ETH_P_ATALK ideal-int

pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_8023 = 4
pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_8023 ideal-int
pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_AARP = 33011
pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_AARP ideal-int
pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_ACCTON = 33680
pkg syscall (netbsd-arm64-cgo), const ETHERTYPE_ACCTON ideal-int

pkg syscall (linux-386), const ETH_P_802_3 = 1
pkg syscall (linux-386), const ETH_P_AARP = 33011
pkg syscall (linux-386), const ETH_P_ALL = 3
pkg syscall (linux-386), const ETH_P_AOE = 34978
pkg syscall (linux-386), const ETH_P_ARCNET = 26
pkg syscall (linux-386), const ETH_P_ARP = 2054
pkg syscall (linux-386), const ETH_P_ATALK = 32923
pkg syscall (linux-386), const ETH_P_ATMFATE = 34948

pkg syscall (freebsd-arm), const EOWNERDEAD Errno
pkg syscall (freebsd-arm), const EV_DROP = 4096
pkg syscall (freebsd-arm), const EV_DROP ideal-int
pkg syscall (freebsd-arm), const IFT_CARP = 248
pkg syscall (freebsd-arm), const IFT_CARP ideal-int
pkg syscall (freebsd-arm), const MAP_ALIGNED_SUPER = 16777216
pkg syscall (freebsd-arm), const MAP_ALIGNED_SUPER ideal-int
pkg syscall (freebsd-arm), const MAP_ALIGNMENT_MASK = -16777216

pkg syscall (freebsd-riscv64), const IFT_BSC = 83 #53466
pkg syscall (freebsd-riscv64), const IFT_BSC ideal-int #53466
pkg syscall (freebsd-riscv64), const IFT_CARP = 248 #53466
pkg syscall (freebsd-riscv64), const IFT_CARP ideal-int #53466
pkg syscall (freebsd-riscv64), const IFT_CCTEMUL = 61 #53466
pkg syscall (freebsd-riscv64), const IFT_CCTEMUL ideal-int #53466

pkg syscall (freebsd-arm64), const IFT_BRIDGE ideal-int
pkg syscall (freebsd-arm64), const IFT_BSC = 83
pkg syscall (freebsd-arm64), const IFT_BSC ideal-int
pkg syscall (freebsd-arm64), const IFT_CARP = 248
pkg syscall (freebsd-arm64), const IFT_CARP ideal-int
pkg syscall (freebsd-arm64), const IFT_CCTEMUL = 61
pkg syscall (freebsd-arm64), const IFT_CCTEMUL ideal-int
pkg syscall (freebsd-arm64), const IFT_CEPT = 19