Hi, These functions were added in Fortran 2018: https://gcc.gnu.org/wiki/Fortran2018Status When it comes to floating-point and IEEE compliance, gfortran fully implements the 2003 and 2008 standards. In a series of patch, as time permits, I would like to add all Fortran 2018 features before the GCC 13 release process begins.
Regarding this patch, the functions are added to the IEEE_ARITHMETIC module, but are entirely expanded in the front-end, using GCC built-ins. They will benefit fully from middle-end optimisation where relevant, and on many targets FMA will reduce to a single instruction (as expected). Regression-tested on x86_64-pc-linux-gnu. OK to commit? FX
0001-fortran-Add-IEEE_SIGNBIT-and-IEEE_FMA-functions.patch
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