diff options
Diffstat (limited to 'inc/stage.h')
| -rw-r--r-- | inc/stage.h | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/inc/stage.h b/inc/stage.h index 03048b0..51ab667 100644 --- a/inc/stage.h +++ b/inc/stage.h @@ -34,7 +34,7 @@ class Stage * ready to accept a new instruction object next cycle. * @return a DTO object containing the next instruction to be processed. * - * Must set the status to STALLED when an operation completes. + * Must set the status to WAIT when the current instruction is evicted.. */ virtual InstrDTO *advance(Response p); @@ -47,31 +47,33 @@ class Stage * @param the condition code to retrieve, */ bool get_condition(CC c); - /** - * Sets the value of the PC register. + * Sets the bit in the condition code register corresponding to `c`. + * @param the condition code to set. + * @param the truthy value to set it to. */ - void set_pc(unsigned int pc); + void set_condition(CC c, bool v); /** * Squashes the pipeline. */ void squash(); + /** + * The set of registers currently checked out. + */ + static std::deque<signed int> checked_out; + protected: /** * The function expected to do the majority of the work. * - * Must set the status to OK when an operation is ready. + * Must set the status to OK when an operation is done. + * Must set the status to STALLED when an operation cannot be completed the + * current cycle. */ virtual void advance_helper() = 0; /** - * Sets the bit in the condition code register corresponding to `c`. - * @param the condition code to set. - * @param the truthy value to set it to. - */ - void set_condition(CC c, bool v); - /** * Helper for `check_out`. * Returns true if r are not checked out, false otherwise. * @param a list of register numbers. @@ -79,6 +81,12 @@ class Stage */ bool is_checked_out(signed int r); /** + * Stores `d` into the register indexed `v`. + * @param the register number. + * @param the value to store. + */ + void store_register(signed int v, signed int d); + /** * Returns the value of the register corresponding to `v`. * @param the register number. * @return the value in the associated register. @@ -112,11 +120,6 @@ class Stage * The current clock cycle. */ static int clock_cycle; - // TODO fix this comment after writeback stage - /** - * The set of registers currently checked out. - */ - static std::deque<signed int> checked_out; /** * A pointer to the next stage in the pipeline. */ |