[2316] in java-interest
Re: Java VM clarifications
daemon@ATHENA.MIT.EDU (Jim Graham)
Fri Sep 29 08:29:58 1995
Date: Wed, 27 Sep 1995 15:39:30 -0700
From: flar@bendenweyr.Eng.Sun.COM (Jim Graham)
To: java-interest@java.Eng.Sun.COM, loofbour@cis.ohio-state.edu
> I'm seeing a few opcodes for which the alpha3 Java VM docs aren't
> adequate. To wit:
>
> 1. Opcodes 135 and 255 appear in compiled code (such as the Java
> contest winners :-), but isn't mentioned anywhere in the VM spec,
> from what I can tell.
135 is i2d
255 doesn't exist. The interpreter would throw an exception (InternalError)
if it was encountered. Are you sure you parsed the bytecodes correctly?
> 2. Opcode 132 is mentioned twice in the spec, once as the i2l type
> conversion instruction and once as the iinc increment
> instruction. I imagine this relates to #1 above.
132 is iinc
133 is i2l
...jim
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