nicer comments in the generated files.
	-import_runtime_cgo
		If set (which it is by default) import runtime/cgo in
		generated output.
	-import_syscall
		If set (which it is by default) import syscall in
		generated output.
	-gccgo
		Generate output for the gccgo compiler rather than the
		gc compiler.
	-gccgoprefix prefix
		The -fgo-prefix option to be used with gccgo.

	BSET	X8, X9, X10				// 33958428
	BSET	$63, X9					// 9394f42b
	BSETI	$1, X10, X11				// 93151528

	// Privileged ISA

	// 3.2.1: Environment Call and Breakpoint
	ECALL						// 73000000
	SCALL						// 73000000
	EBREAK						// 73001000
	SBREAK						// 73001000

	// Arbitrary bytes (entered in little-endian mode)
	WORD	$0x12345678	// WORD $305419896	// 78563412