// We need to choose which executable we are using. In shell mode, or when we
        // are spawning and thus using the wrapper script, the executable is the shell.
        if (useShell || spawn) {
            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                realExecutable = 'cmd'
                realArgs.add('/C')
                realArgs.add('"') // quote the entire command
            } else {
                realExecutable = 'sh'

			items = operands[:cap(operands)][len(operands)][:0]
		} else {
			items = make([]lex.Token, 0, 3)
		}
		for {
			tok = p.nextToken()
			if len(operands) == 0 && len(items) == 0 {
				if p.arch.InFamily(sys.ARM, sys.ARM64, sys.AMD64, sys.I386, sys.Loong64, sys.RISCV64) && tok == '.' {
					// Suffixes: ARM conditionals, Loong64 vector instructions, RISCV rounding mode or x86 modifiers.
					tok = p.nextToken()