[Yarv-devel] expandarray and opcode questions

[George Marrows]

Hi.

1. Can you explain the expandarray opcode a bit more please? The 
arguments to expandarray are num, flag. num seems to control how many 
elements to take from an array.
-- what does it mean if num is negative?
-- what does flag do?

I've think I've found a couple of multiple assignment bugs - I'd like to 
try fixing them myself, but I need to understand expandarray first.


2. Can you explain the optimized opcodes a bit - I don't understand 
their names.

getlocal_OP_1
-- I assume this getlocal with idx set to be 1. OP = 'operand'?

getdynamic_OP__WC__0 
-- what does 'WC' mean?

getlocal_SC_xx_ax, _ax_ab, _bx_ba etc
-- what is SC? 'stack cache'?
-- what are xx, ax, ab, bx, ba etc??


Thanks for your help!

-- George