int CompareStub::MinorKey() {
- // Encode the three parameters in a unique 16 bit value.
- ASSERT((static_cast<unsigned>(cc_) >> 26) < (1 << 16));
- int nnn_value = (never_nan_nan_ ? 2 : 0);
- if (cc_ != eq) nnn_value = 0; // Avoid duplicate stubs.
- return (static_cast<unsigned>(cc_) >> 26) | nnn_value | (strict_ ? 1 : 0);
+ // Encode the three parameters in a unique 16 bit value. To avoid duplicate
+ // stubs the never NaN NaN condition is only taken into account if the
+ // condition is equals.
+ ASSERT((static_cast<unsigned>(cc_) >> 28) < (1 << 14));
+ return ConditionField::encode(static_cast<unsigned>(cc_) >> 28)
+ | StrictField::encode(strict_)
+ | NeverNanNanField::encode(cc_ == eq ? never_nan_nan_ : false);
}
// stubs.
bool never_nan_nan_;
+ // Encoding of the minor key CCCCCCCCCCCCCCNS.
+ class StrictField: public BitField<bool, 0, 1> {};
+ class NeverNanNanField: public BitField<bool, 1, 1> {};
+ class ConditionField: public BitField<int, 2, 14> {};
+
Major MajorKey() { return Compare; }
int MinorKey();
int CompareStub::MinorKey() {
- // Encode the three parameters in a unique 16 bit value.
+ // Encode the three parameters in a unique 16 bit value. To avoid duplicate
+ // stubs the never NaN NaN condition is only taken into account if the
+ // condition is equals.
ASSERT(static_cast<unsigned>(cc_) < (1 << 14));
- int nnn_value = (never_nan_nan_ ? 2 : 0);
- if (cc_ != equal) nnn_value = 0; // Avoid duplicate stubs.
- return (static_cast<unsigned>(cc_) << 2) | nnn_value | (strict_ ? 1 : 0);
+ return ConditionField::encode(static_cast<unsigned>(cc_))
+ | StrictField::encode(strict_)
+ | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false);
}
int CompareStub::MinorKey() {
- // Encode the three parameters in a unique 16 bit value.
+ // Encode the three parameters in a unique 16 bit value. To avoid duplicate
+ // stubs the never NaN NaN condition is only taken into account if the
+ // condition is equals.
ASSERT(static_cast<unsigned>(cc_) < (1 << 14));
- int nnn_value = (never_nan_nan_ ? 2 : 0);
- if (cc_ != equal) nnn_value = 0; // Avoid duplicate stubs.
- return (static_cast<unsigned>(cc_) << 2) | nnn_value | (strict_ ? 1 : 0);
+ return ConditionField::encode(static_cast<unsigned>(cc_))
+ | StrictField::encode(strict_)
+ | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false);
}