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LangRef: Fix minimumnum/maximumnum nan handling phrasing #139228

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May 15, 2025
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LangRef: Fix minimumnum/maximumnum nan handling phrasing #139228

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25 changes: 15 additions & 10 deletions llvm/docs/LangRef.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -17183,12 +17183,14 @@ type.

Semantics:
""""""""""
If both operands are NaNs (including sNaN), returns qNaN. If one operand
is NaN (including sNaN) and another operand is a number, return the number.
Otherwise returns the lesser of the two arguments. -0.0 is considered to
be less than +0.0 for this intrinsic.

Note that these are the semantics of minimumNumber specified in IEEE 754-2019.
If both operands are NaNs (including sNaN), returns a :ref:`NaN <floatnan>`. If
one operand is NaN (including sNaN) and another operand is a number,
return the number. Otherwise returns the lesser of the two
arguments. -0.0 is considered to be less than +0.0 for this intrinsic.

Note that these are the semantics of minimumNumber specified in
IEEE-754-2019 with the usual :ref:`signaling NaN <floatnan>` exception.

It has some differences with '``llvm.minnum.*``':
1)'``llvm.minnum.*``' will return qNaN if either operand is sNaN.
Expand Down Expand Up @@ -17229,12 +17231,15 @@ type.

Semantics:
""""""""""
If both operands are NaNs (including sNaN), returns qNaN. If one operand
is NaN (including sNaN) and another operand is a number, return the number.
Otherwise returns the greater of the two arguments. -0.0 is considered to
be less than +0.0 for this intrinsic.

Note that these are the semantics of maximumNumber specified in IEEE 754-2019.
If both operands are NaNs (including sNaN), returns a
:ref:`NaN <floatnan>`. If one operand is NaN (including sNaN) and
another operand is a number, return the number. Otherwise returns the
greater of the two arguments. -0.0 is considered to be less than +0.0
for this intrinsic.

Note that these are the semantics of maximumNumber specified in
IEEE-754-2019 with the usual :ref:`signaling NaN <floatnan>` exception.

It has some differences with '``llvm.maxnum.*``':
1)'``llvm.maxnum.*``' will return qNaN if either operand is sNaN.
Expand Down
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