* interpret.cc (continue1): Implement explicit dispatch table.
insn_target: Explicit interpreter switch table.
SAVE_PC: New macro, moves pc saving code into instructions that
require so.
NEXT_INSN: New macro, replaces `goto next_insn' in all insns.
PC_REGISTER_ASM: New macro.
INLINE_SWITCH: New macro. Constrols dispatching strategy.
opcode: Remove local variable.
{i,l,f,d}{load,store}_{0,1,2,3}: Expand definitions.
(POKEI): Use _Jv_word.
(iinc): Use _Jv_word.
(dupx): Change reference argument (sp) to pointer.
(jvdump): Remove