"ppc64le": {"GOPPC64", "power8", "power9", "power10"},
		"ppc64x":  {}, // A pseudo-arch representing both ppc64 and ppc64le
		"s390x":   {},
		"wasm":    {},
		"riscv64": {"GORISCV64", "rva20u64", "rva22u64"},
	}
)

// wantedAsmOpcode is a single asmcheck check
type wantedAsmOpcode struct {
	fileline string         // original source file/line (eg: "/path/foo.go:45")

	if b == "" {
		b = "hardfloat"
	}
	gomips64 = b

	b = os.Getenv("GOPPC64")
	if b == "" {
		b = "power8"
	}
	goppc64 = b

	b = os.Getenv("GORISCV64")
	if b == "" {
		b = "rva20u64"
	}
	goriscv64 = b

	if p := pathf("%s/src/all.bash", goroot); !isfile(p) {
		fatalf("$GOROOT is not set correctly or not exported\n"+
			"\tGOROOT=%s\n"+
			"\t%s does not exist", goroot, p)
	}