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Use a flag in TT to track null search values

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Add VALUE_TYPE_NS_LO to enum ValueType and use it when
saving in TT a value from a null search.

Currently no action is performed, the next patch will enable
the new type.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-04-10 09:53:08 +01:00
parent a9e9746495
commit 06a350f1ae
3 changed files with 12 additions and 9 deletions
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11
src/value.h
View File

@@ -33,13 +33,16 @@
////
enum ValueType {
VALUE_TYPE_NONE = 0,
VALUE_TYPE_NONE = 0,
VALUE_TYPE_UPPER = 1, // Upper bound
VALUE_TYPE_LOWER = 2, // Lower bound
VALUE_TYPE_EXACT = 3, // Exact score
VALUE_TYPE_EVAL = 4, // Evaluation cache
VALUE_TYPE_EV_UP = 5, // Evaluation cache for upper bound
VALUE_TYPE_EV_LO = 6 // Evaluation cache for lower bound
VALUE_TYPE_EVAL = 4, // Static evaluation value
VALUE_TYPE_NULL = 8, // Null search value
VALUE_TYPE_EV_UP = VALUE_TYPE_EVAL | VALUE_TYPE_UPPER,
VALUE_TYPE_EV_LO = VALUE_TYPE_EVAL | VALUE_TYPE_LOWER,
VALUE_TYPE_NS_LO = VALUE_TYPE_NULL | VALUE_TYPE_LOWER,
};