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Diffstat (limited to 'cpu/ozone/null_predictor.hh')
-rw-r--r-- | cpu/ozone/null_predictor.hh | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/cpu/ozone/null_predictor.hh b/cpu/ozone/null_predictor.hh deleted file mode 100644 index d19e2cd1c..000000000 --- a/cpu/ozone/null_predictor.hh +++ /dev/null @@ -1,76 +0,0 @@ - -#ifndef __CPU_OZONE_NULL_PREDICTOR_HH__ -#define __CPU_OZONE_NULL_PREDICTOR_HH__ - -#include "arch/isa_traits.hh" -#include "cpu/inst_seq.hh" - -template <class Impl> -class NullPredictor -{ - public: - typedef typename Impl::Params Params; - typedef typename Impl::DynInstPtr DynInstPtr; - - NullPredictor(Params *p) { } - - struct BPredInfo { - BPredInfo() - : PC(0), nextPC(0) - { } - - BPredInfo(const Addr &pc, const Addr &next_pc) - : PC(pc), nextPC(next_pc) - { } - - Addr PC; - Addr nextPC; - }; - - BPredInfo lookup(Addr &PC) { return BPredInfo(PC, PC+4); } - - void undo(BPredInfo &bp_info) { return; } - - /** - * Predicts whether or not the instruction is a taken branch, and the - * target of the branch if it is taken. - * @param inst The branch instruction. - * @param PC The predicted PC is passed back through this parameter. - * @param tid The thread id. - * @return Returns if the branch is taken or not. - */ - bool predict(DynInstPtr &inst, Addr &PC, unsigned tid) - { return false; } - - /** - * Tells the branch predictor to commit any updates until the given - * sequence number. - * @param done_sn The sequence number to commit any older updates up until. - * @param tid The thread id. - */ - void update(const InstSeqNum &done_sn, unsigned tid) { } - - /** - * Squashes all outstanding updates until a given sequence number. - * @param squashed_sn The sequence number to squash any younger updates up - * until. - * @param tid The thread id. - */ - void squash(const InstSeqNum &squashed_sn, unsigned tid) { } - - /** - * Squashes all outstanding updates until a given sequence number, and - * corrects that sn's update with the proper address and taken/not taken. - * @param squashed_sn The sequence number to squash any younger updates up - * until. - * @param corr_target The correct branch target. - * @param actually_taken The correct branch direction. - * @param tid The thread id. - */ - void squash(const InstSeqNum &squashed_sn, const Addr &corr_target, - bool actually_taken, unsigned tid) - { } - -}; - -#endif // __CPU_OZONE_NULL_PREDICTOR_HH__ |