https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111733
Bug ID: 111733
Summary: Emit inline SVE FSCALE instruction for ldexp
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Having noticed https://github.com/llvm/llvm-project/pull/67552 in LLVM GCC
should be able to emit the SVE fscale instruction [1] to implement the ldexp
standard function.
There is already an ldexpm3 optab defined so it should be a relatively simple
matter of wiring up the expander for TARGET_SVE
[1]
https://developer.arm.com/documentation/ddi0596/2021-12/SVE-Instructions/FSCALE--Floating-point-adjust-exponent-by-vector--predicated--?lang=en
