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[LangRef] clarify semantics of the frem instruction

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As noted in D40594, the frem instruction corresponds to fmod() except that it can't set errno.
I modified the text that we currently use for intrinsics that map to libm functions and applied
it to frem.

Differential Revision: https://reviews.llvm.org/D40629

llvm-svn: 319437
This commit is contained in:
Sanjay Patel 2017-11-30 14:59:03 +00:00
parent 0f33074407
commit a05b38588b
1 changed files with 6 additions and 4 deletions
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10
docs/LangRef.rst
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@ -6827,10 +6827,12 @@ Both arguments must have identical types.
Semantics:
""""""""""
This instruction returns the *remainder* of a division. The remainder
has the same sign as the dividend. This instruction can also take any
number of :ref:`fast-math flags <fastmath>`, which are optimization hints
to enable otherwise unsafe floating point optimizations:
Return the same value as a libm '``fmod``' function but without trapping or
setting ``errno``.
The remainder has the same sign as the dividend. This instruction can also
take any number of :ref:`fast-math flags <fastmath>`, which are optimization
hints to enable otherwise unsafe floating-point optimizations:
Example:
""""""""