)

const (
	// R bit option in prefixed load/store/add D-form operations
	PFX_R_ABS   = 0 // Offset is absolute
	PFX_R_PCREL = 1 // Offset is relative to PC, RA should be 0
)

const (
	// The preferred hardware nop instruction.
	NOP = 0x60000000
)

type Optab struct {
	as    obj.As // Opcode
	a1    uint8  // p.From argument (obj.Addr). p is of type obj.Prog.
	a2    uint8  // p.Reg argument (int16 Register)

	EM_RX            Machine = 173 /* Renesas RX family */
	EM_METAG         Machine = 174 /* Imagination Technologies META processor architecture */
	EM_MCST_ELBRUS   Machine = 175 /* MCST Elbrus general purpose hardware architecture */
	EM_ECOG16        Machine = 176 /* Cyan Technology eCOG16 family */
	EM_CR16          Machine = 177 /* National Semiconductor CompactRISC CR16 16-bit microprocessor */

(AndB ...) => (AND ...)
(OrB  ...) => (OR ...)
(EqB  x y) => (XOR (MOVDconst [1]) (XOR <typ.Bool> x y))
(NeqB ...) => (XOR ...)
(Not    x) => (XOR (MOVDconst [1]) x)

// shifts
// hardware instruction uses only the low 6 bits of the shift
// we compare to 64 to ensure Go semantics for large shifts
// Rules about rotates with non-const shift are based on the following rules,

//	GOARM64
//		For GOARCH=arm64, the ARM64 architecture for which to compile.
//		Valid values are v8.0 (default), v8.{1-9}, v9.{0-5}.
//		The value can be followed by an option specifying extensions implemented by target hardware.
//		Valid options are ,lse and ,crypto.
//		Note that some extensions are enabled by default starting from a certain GOARM64 version;
//		for example, lse is enabled by default starting from v8.1.
//	GO386

//
// Design doc at https://golang.org/s/go11sched.

// Worker thread parking/unparking.
// We need to balance between keeping enough running worker threads to utilize
// available hardware parallelism and parking excessive running worker threads
// to conserve CPU resources and power. This is not simple for two reasons:
// (1) scheduler state is intentionally distributed (in particular, per-P work

		`Africa/Conakry`,
		`Africa/Dakar`,
		`Africa/Dar_es_Salaam`,
		`Africa/Djibouti`,
		`Africa/Douala`,
		`Africa/El_Aaiun`,
		`Africa/Freetown`,
		`Africa/Gaborone`,
		`Africa/Harare`,
		`Africa/Johannesburg`,
		`Africa/Juba`,
		`Africa/Kampala`,
		`Africa/Khartoum`,
		`Africa/Kigali`,
		`Africa/Kinshasa`,
		`Africa/Lagos`,
		`Africa/Libreville`,
		`Africa/Lome`,