//	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;

	archVariants = map[string][]string{
		"386":     {"GO386", "sse2", "softfloat"},
		"amd64":   {"GOAMD64", "v1", "v2", "v3", "v4"},
		"arm":     {"GOARM", "5", "6", "7", "7,softfloat"},
		"arm64":   {"GOARM64", "v8.0", "v8.1"},
		"loong64": {},
		"mips":    {"GOMIPS", "hardfloat", "softfloat"},
		"mips64":  {"GOMIPS64", "hardfloat", "softfloat"},
		"ppc64":   {"GOPPC64", "power8", "power9", "power10"},

	makeAtomicGuardedIntrinsicARM64 := func(op0, op1 ssa.Op, typ types.Kind, emit atomicOpEmitter) intrinsicBuilder {

		return func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
			if buildcfg.GOARM64.LSE {
				emit(s, n, args, op1, typ)
			} else {
				// Target Atomic feature is identified by dynamic detection
				addr := s.entryNewValue1A(ssa.OpAddr, types.Types[types.TBOOL].PtrTo(), ir.Syms.ARM64HasATOMICS, s.sb)