diff options
Diffstat (limited to 'gcc/predict.h')
| -rw-r--r-- | gcc/predict.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/predict.h b/gcc/predict.h index 83b1695..23435dc 100644 --- a/gcc/predict.h +++ b/gcc/predict.h @@ -20,6 +20,16 @@ along with GCC; see the file COPYING3. If not see #ifndef GCC_PREDICT_H #define GCC_PREDICT_H +/* Random guesstimation given names. + PROB_VERY_UNLIKELY should be small enough so basic block predicted + by it gets below HOT_BB_FREQUENCY_FRACTION. */ +#define PROB_VERY_UNLIKELY (REG_BR_PROB_BASE / 2000 - 1) +#define PROB_EVEN (REG_BR_PROB_BASE / 2) +#define PROB_VERY_LIKELY (REG_BR_PROB_BASE - PROB_VERY_UNLIKELY) +#define PROB_ALWAYS (REG_BR_PROB_BASE) +#define PROB_UNLIKELY (REG_BR_PROB_BASE / 5 - 1) +#define PROB_LIKELY (PROB_ALWAYS - PROB_VERY_LIKELY) + #define DEF_PREDICTOR(ENUM, NAME, HITRATE, FLAGS) ENUM, enum br_predictor { |