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[dart2wasm] Fix isNegative on NaN values
New passing tests: - co19/LibTest/core/double/isNegative_A01_t01 - corelib/nan_infinity_test/01 - corelib/nan_infinity_test/none - language/unsorted/intrinsified_methods_test Change-Id: I379525fe0da36d6fc365d275ded9370f2b5b4812 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/274541 Reviewed-by: Aske Simon Christensen <askesc@google.com> Commit-Queue: Ömer Ağacan <omersa@google.com>
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@ -137,6 +137,9 @@ class _BoxedDouble extends double {
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bool operator <=(num other) => this <= other.toDouble(); // Intrinsic <=
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bool get isNegative {
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if (isNaN) {
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return false;
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}
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int bits = doubleToIntBits(this);
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return (bits & _signMask) != 0;
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}
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