https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66462
--- Comment #21 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Wilco Dijkstra <wi...@gcc.gnu.org>: https://gcc.gnu.org/g:b996d4509f1724d92a08dae70d8354fbb5561fb7 commit r16-3803-gb996d4509f1724d92a08dae70d8354fbb5561fb7 Author: Wilco Dijkstra <wilco.dijks...@arm.com> Date: Wed Aug 27 17:20:21 2025 +0000 AArch64: Add isfinite expander [PR 66462] Add an expander for isfinite using integer arithmetic. This is typically faster and avoids generating spurious exceptions on signaling NaNs. This fixes part of PR66462. int isfinite1 (float x) { return __builtin_isfinite (x); } Before: fabs s0, s0 mov w0, 2139095039 fmov s31, w0 fcmp s0, s31 cset w0, hi eor w0, w0, 1 ret After: fmov w1, s0 mov w0, -16777216 cmp w0, w1, lsl 1 cset w0, hi ret gcc: PR middle-end/66462 * config/aarch64/aarch64.md (isfinite<mode>2): Add new expander. gcc/testsuite: PR middle-end/66462 * gcc.target/aarch64/pr66462.c: Add tests for isfinite.
