tree 9e28609c5c61dcc4b13fa95b66c4f7fa530140fc
parent ee476996bec7f170928505a4c5b7715183cfbada
author Matt Arsenault <Matthew.Arsenault@amd.com> 1682560630 -0400
committer Matt Arsenault <Matthew.Arsenault@amd.com> 1687978216 -0400

IR: Add llvm.frexp intrinsic

Add an intrinsic which returns the two pieces as multiple return
values. Alternatively could introduce a pair of intrinsics to
separately return the fractional and exponent parts.

AMDGPU has native instructions to return the two halves, but could use
some generic legalization and optimization handling. For example, we
should be able to handle legalization of f16 on older targets, and for
bf16. Additionally antique targets need a hardware workaround which
would be better handled in the backend rather than in library code
where it is now.