diff options
Diffstat (limited to 'erts/emulator/beam/select_instrs.tab')
-rw-r--r-- | erts/emulator/beam/select_instrs.tab | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/erts/emulator/beam/select_instrs.tab b/erts/emulator/beam/select_instrs.tab index 6b59f02925..4a8d9cce96 100644 --- a/erts/emulator/beam/select_instrs.tab +++ b/erts/emulator/beam/select_instrs.tab @@ -30,16 +30,15 @@ select_val_bins.fetch(Src) { } select_val_bins.select(Fail, NumElements) { - struct Pairs { + struct Singleton { BeamInstr val; - Eterm offset; }; - struct Pairs* low; - struct Pairs* high; - struct Pairs* mid; + struct Singleton* low; + struct Singleton* high; + struct Singleton* mid; int bdiff; /* int not long because the arrays aren't that large */ - low = (struct Pairs *) (&$NumElements + 1); + low = (struct Singleton *) ($NEXT_INSTRUCTION); high = low + $NumElements; /* The pointer subtraction (high-low) below must produce @@ -60,15 +59,17 @@ select_val_bins.select(Fail, NumElements) { * */ while ((bdiff = (int)((char*)high - (char*)low)) > 0) { - unsigned int boffset = ((unsigned int)bdiff >> 1) & ~(sizeof(struct Pairs)-1); + unsigned int boffset = ((unsigned int)bdiff >> 1) & ~(sizeof(struct Singleton)-1); - mid = (struct Pairs*)((char*)low + boffset); + mid = (struct Singleton*)((char*)low + boffset); if (select_val < mid->val) { high = mid; } else if (select_val > mid->val) { low = mid + 1; } else { - $JUMP(mid->offset); + Sint32* jump_tab = (Sint32 *) ($NEXT_INSTRUCTION + $NumElements); + Sint32 offset = jump_tab[mid - (struct Singleton *)($NEXT_INSTRUCTION)]; + $JUMP(offset); } } $JUMP($Fail); |