https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86161
Bug ID: 86161
Summary: Add insn support for __builtin_isnormal and
__builtin_fpclassify
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
I was tracking down a bug in PowerPC with isnormal, and I noticed we don't have
optab support for doing either the isnormal or fpclassify builtins in-line.
Instead we generate a series of test (isnan, isinfinite, etc.) to calculate the
answer.
The PowerPC has an instruction (xststdcdp) that can simplify this operation.
There may be other backends that could improve their code if we add the optab
support for these operations.
