NAME

Parrot::OpTrans::CPrederef - C Predereferenced Transform

DESCRIPTION

Parrot::OpTrans::CPrederef inherits from Parrot::OpTrans::C to provide predereferenced register addressing run loop.

core_type(): The core type is PARROT_PREDEREF_CORE.
prefix(): The prefix is 'Parrot_pred_'.; This is used in Parrot::Op's func_name().
defines(): Returns the C #define macros required by the ops.
suffix(): The suffix is '_prederef'.
opsarraytype(): The ops array type is void *.
gen_goto($where): TODO - This is the same implementation as in Parrot::OpTrans. It should not be duplicated.
expr_pop(): Addresses on the stack are pointers into the bytecode array, and so must be converted to pointers into the prederef array.
expr_address($address): Same logic as expr_pop().
expr_offset($offset)
goto_offset($offset)
goto_address($address): CPrederef is funky in that expr OFFSET(n) uses a pointer to the original bytecode, but goto OFFSET(n) returns a pointer into the prederef array. (see expr_pop(), above, for a description of why this works.)
access_arg($type, $num, $op): Returns the C code for the specified op argument type (see Parrot::OpTrans) and value. $op is an instance of Parrot::Op.

parrotcode: C Predereferenced Transform
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