From 79c52daf4740b00bef43e4f5a4281b3480459b38 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Mon, 20 May 2024 13:41:39 +0000 Subject: Implement C23 log2p1 C23 adds various function families originally defined in TS 18661-4. Add the log2p1 functions (log2(1+x): like log1p, but for base-2 logarithms). This illustrates the intended structure of implementations of all these function families: define them initially with a type-generic template implementation. If someone wishes to add type-specific implementations, it is likely such implementations can be both faster and more accurate than the type-generic one and can then override it for types for which they are implemented (adding benchmarks would be desirable in such cases to demonstrate that a new implementation is indeed faster). The test inputs are copied from those for log1p. Note that these changes make gen-auto-libm-tests depend on MPFR 4.2 (or later). The bulk of the changes are fairly generic for any such new function. (sysdeps/powerpc/nofpu/Makefile only needs changing for those type-generic templates that use fabs.) Tested for x86_64 and x86, and with build-many-glibcs.py. --- sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist') diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist index edc26140dc..a57eedb779 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist @@ -994,3 +994,9 @@ GLIBC_2.4 truncl F GLIBC_2.4 y0l F GLIBC_2.4 y1l F GLIBC_2.4 ynl F +GLIBC_2.40 log2p1 F +GLIBC_2.40 log2p1f F +GLIBC_2.40 log2p1f32 F +GLIBC_2.40 log2p1f32x F +GLIBC_2.40 log2p1f64 F +GLIBC_2.40 log2p1l F -- cgit 1.4.1