mirror of git://sourceware.org/git/glibc.git
06caf53adf
C23 adds various <math.h> function families originally defined in TS 18661-4. Add the rootn functions, which compute the Yth root of X for integer Y (with a domain error if Y is 0, even if X is a NaN). The integer exponent has type long long int in C23; it was intmax_t in TS 18661-4, and as with other interfaces changed after their initial appearance in the TS, I don't think we need to support the original version of the interface. As with pown and compoundn, I strongly encourage searching for worst cases for ulps error for these implementations (necessarily non-exhaustively, given the size of the input space). I also expect a custom implementation for a given format could be much faster as well as more accurate, although the implementation is simpler than those for pown and compoundn. This completes adding to glibc those TS 18661-4 functions (ignoring DFP) that are included in C23. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118592 regarding the C23 mathematical functions (not just the TS 18661-4 ones) missing built-in functions in GCC, where such functions might usefully be added. Tested for x86_64 and x86, and with build-many-glibcs.py. |
||
|---|---|---|
| .. | ||
| 64 | ||
| include/asm | ||
| x32 | ||
| Implies | ||
| Makefile | ||
| Versions | ||
| ____longjmp_chk.S | ||
| __start_context.S | ||
| allocate-shadow-stack.c | ||
| allocate-shadow-stack.h | ||
| clone.S | ||
| clone3.S | ||
| configure | ||
| configure.ac | ||
| dl-cet.h | ||
| dl-plt-rewrite.h | ||
| dl-procinfo.c | ||
| get-cpuid-feature-leaf.c | ||
| getcontext.S | ||
| kernel-features.h | ||
| ldd-rewrite.sed | ||
| libc_sigaction.c | ||
| libmvec.abilist | ||
| makecontext.c | ||
| pointer_guard.h | ||
| setcontext.S | ||
| sigaltstack-offsets.sym | ||
| sigcontextinfo.h | ||
| single-thread.h | ||
| swapcontext.S | ||
| syscall.S | ||
| syscall_cancel.S | ||
| syscalls.list | ||
| sysdep.S | ||
| sysdep.h | ||
| tst-cet-property-1.c | ||
| tst-cet-property-2.c | ||
| tst-cet-property-dep-2.S | ||
| tst-cet-setcontext-1.c | ||
| tst-cet-vfork-1.c | ||
| tst-glibc-hwcaps-2.c | ||
| tst-gnu2-tls2-amx-mod0.c | ||
| tst-gnu2-tls2-amx-mod1.c | ||
| tst-gnu2-tls2-amx-mod2.c | ||
| tst-gnu2-tls2-amx.c | ||
| tst-gnu2-tls2-amx.h | ||
| ucontext_i.sym | ||
| vfork.S | ||
| x86-64-isa-level-VALUE.c | ||