Mercurial > hg > truffle
changeset 4650:8e39bd349bbb
added Condition.implies(...)
| author | Lukas Stadler <lukas.stadler@jku.at> |
|---|---|
| date | Mon, 20 Feb 2012 14:37:32 +0100 |
| parents | 5195b780d253 |
| children | 4e9d904a4d1a |
| files | graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/calc/Condition.java |
| diffstat | 1 files changed, 21 insertions(+), 0 deletions(-) [+] |
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--- a/graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/calc/Condition.java Mon Feb 20 14:34:51 2012 +0100 +++ b/graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/calc/Condition.java Mon Feb 20 14:37:32 2012 +0100 @@ -134,6 +134,27 @@ throw new IllegalArgumentException(this.toString()); } + public boolean implies(Condition other) { + if (other == this) { + return true; + } + switch (this) { + case EQ: return other == LE || other == GE || other == BE || other == AE; + case NE: return false; + case LT: return other == LE; + case LE: return false; + case GT: return other == GE; + case GE: return false; + case BT: return other == BE; + case BE: return false; + case AT: return other == AE; + case AE: return false; + case OF: return false; + case NOF: return false; + } + throw new IllegalArgumentException(this.toString()); + } + /** * Mirror this conditional (i.e. commute "a op b" to "b op' a") * @return the condition representing the equivalent commuted operation