[JAVA] Generate fconst_2 bytecode

[Per Bothner]

Roger Sayle wrote:

> Ok for mainline?

Yes.

> 2003-09-17  Roger Sayle  <roger@eyesopen.com>
> 
> 	* jcf-write.c (generate_bytecode_insns): Add support for fconst_2.
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	--Per Bothner
per@bothner.com   http://per.bothner.com/