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[doc] Clarify constrained fcmps behavior
Reviewed By: uweigand Differential Revision: https://reviews.llvm.org/D101053
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@ -19285,7 +19285,11 @@ The quiet comparison operation performed by
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'``llvm.experimental.constrained.fcmp``' will only raise an exception
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if either operand is a SNAN. The signaling comparison operation
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performed by '``llvm.experimental.constrained.fcmps``' will raise an
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exception if either operand is a NAN (QNAN or SNAN).
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exception if either operand is a NAN (QNAN or SNAN). Such an exception
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does not preclude a result being produced (e.g. exception might only
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set a flag), therefore the distinction between ordered and unordered
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comparisons is also relevant for the
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'``llvm.experimental.constrained.fcmps``' intrinsic.
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'``llvm.experimental.constrained.fmuladd``' Intrinsic
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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