From 525f803984f278e65dc07ca1156bdeca63755810 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Tue, 20 Dec 2016 00:46:53 +0000 Subject: Add fmaxmag, fminmag functions. TS 18661-1 defines fmaxmag and fminmag functions that return the argument with maximum / minimum magnitude (acting like fmax / fmin if the arguments have the same magnitude or either argument is a NaN). These correspond to the IEEE 754-2008 operations maxNumMag and minNumMag. This patch implements these functions for glibc. They are implemented with type-generic templates. Tests are based on those for fmax and fmin. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fmaxmag): New declaration. (fminmag): Likewise. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (fmaxmag): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (fminmag): Likewise. * math/Versions (fmaxmag): New libm symbol at version GLIBC_2.25. (fmaxmagf): Likewise. (fmaxmagl): Likewise. (fminmag): Likewise. (fminmagf): Likewise. (fminmagl): Likewise. * math/Makefile (gen-libm-calls): Add s_fmaxmagF and s_fminmagF. * math/s_fmaxmag_template.c: New file. * math/s_fminmag_template.c: Likewise. * math/libm-test.inc (fmaxmag_test_data): New array. (fmaxmag_test): New function. (fminmag_test_data): New array. (fminmag_test): New function. (main): Call fmaxmag_test and fminmag_test. * math/test-tgmath.c (NCALLS): Increase to 132. (F(compile_test)): Call fmaxmag and fminmag. (F(fminmag)): New function. (F(fmaxmag)): Likewise. * manual/arith.texi (Misc FP Arithmetic): Document fminmag, fminmagf, fminmagl, fmaxmag, fmaxmagf and fmaxmagl. * manual/libm-err-tab.pl (@all_functions): Add fmaxmag and fminmag. * sysdeps/ieee754/ldbl-opt/nldbl-fmaxmag.c: New file. * sysdeps/ieee754/ldbl-opt/nldbl-fminmag.c: Likewise. * sysdeps/ieee754/ldbl-opt/s_fmaxmagl.c: Likewise. * sysdeps/ieee754/ldbl-opt/s_fminmagl.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fmaxmag and fminmag. (CFLAGS-nldbl-fmaxmag.c): New variable. (CFLAGS-nldbl-fminmag.c): Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise. --- manual/arith.texi | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'manual/arith.texi') diff --git a/manual/arith.texi b/manual/arith.texi index a20a4dec6c..f90ef26c91 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -2155,6 +2155,38 @@ If an argument is NaN, the other argument is returned. If both arguments are NaN, NaN is returned. @end deftypefun +@comment math.h +@comment ISO +@deftypefun double fminmag (double @var{x}, double @var{y}) +@comment math.h +@comment ISO +@deftypefunx float fminmagf (float @var{x}, float @var{y}) +@comment math.h +@comment ISO +@deftypefunx {long double} fminmagl (long double @var{x}, long double @var{y}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +These functions, from TS 18661-1:2014, return whichever of the two +values @var{x} and @var{y} has the smaller absolute value. If both +have the same absolute value, or either is NaN, they behave the same +as the @code{fmin} functions. +@end deftypefun + +@comment math.h +@comment ISO +@deftypefun double fmaxmag (double @var{x}, double @var{y}) +@comment math.h +@comment ISO +@deftypefunx float fmaxmagf (float @var{x}, float @var{y}) +@comment math.h +@comment ISO +@deftypefunx {long double} fmaxmagl (long double @var{x}, long double @var{y}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +These functions, from TS 18661-1:2014, return whichever of the two +values @var{x} and @var{y} has the greater absolute value. If both +have the same absolute value, or either is NaN, they behave the same +as the @code{fmax} functions. +@end deftypefun + @comment math.h @comment ISO @deftypefun double fdim (double @var{x}, double @var{y}) -- cgit v1.2.3