On 02/18/2015 01:34 PM, Mark Roos wrote:
A statement from Remi defined the reason for my original question very well.the ASM packages are only re-exported [1] for nashorn Like the Nashorn folks I am building a language using the jvm for which it would be helpful if there was a standard api for bytecode writing. One which kept up with the movement of the jvm and was focused on the needs of language writers. I am jealous that these folks get toys that I only hear talks on.:
You could try gnu.bytecode, which is a stand-alone part of Kawa: http://www.gnu.org/software/kawa/gnu.bytecode/ ASM is very general and powerful, but gnu.bytecode is focused especially on generating very efficient bytecode for a high-level language. It has various convenience features that (as far as I know) ASM lacks or is less convenient: Tracking stack, local variables, types; generating stack map; convenience APIs for ifs and switches, selecting optimal instructions for arithmetic and constants; and more. ASM can do all of these things tolerably well, I'm sure, but it requires a little more manual coding and instruction selection. OTOH ASM does have more resources and support. Remi once suggested I should look into a slimmed-down gnu.bytecode that sits on top of ASM. However, I haven't really looked into this; it would especially attractive if/when ASM is made an official part of OpenJDK. At a higher level you could use Kawa's other higher-level functionality for language implementation. It depends on your goals and the style of your language. Kawa is optimized for static compilation and static optimization, and does not use invokedynamic so far. In spite of this, compilation speed is pretty good, and start-up time is excellent. Run-time performance is Java-like. The downside is that the Kawa higher-level compilation framework is less modular and nailed-down than gnu-bytecode; it's easiest if you structure things the way Kawa expects: A Language sub-class, a Compilation sub-class, a Lexer sub-class (actually the parser), and so on. See gnu/xquery in the Kawa source code for an implementation of a very different language than Kawa's primary language Scheme. -- --Per Bothner p...@bothner.com http://per.bothner.com/ _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
