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glibc/sysdeps/ieee754/ldbl-128ibm
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Joseph Myers 8d3f9e85cf Add narrowing subtract functions. 
This patch adds the narrowing subtract functions from TS 18661-1 to
glibc's libm: fsub, fsubl, dsubl, f32subf64, f32subf32x, f32xsubf64
for all configurations; f32subf64x, f32subf128, f64subf64x,
f64subf128, f32xsubf64x, f32xsubf128, f64xsubf128 for configurations
with _Float64x and _Float128; __nldbl_dsubl for ldbl-opt.

The changes are essentially the same as for the narrowing add
functions, so the description of those generally applies to this patch
as well.

Tested for x86_64, x86, mips64 (all three ABIs, both hard and soft
float) and powerpc, and with build-many-glibcs.py.

	* math/Makefile (libm-narrow-fns): Add sub.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing subtract functions.
	* math/bits/mathcalls-narrow.h (sub): Use __MATHCALL_NARROW.
	* math/gen-auto-libm-tests.c (test_functions): Add sub.
	* math/math-narrow.h (CHECK_NARROW_SUB): New macro.
	(NARROW_SUB_ROUND_TO_ODD): Likewise.
	(NARROW_SUB_TRIVIAL): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__fsubl): New
	macro.
	(__dsubl): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fsub and
	dsub.
	(CFLAGS-nldbl-dsub.c): New variable.
	(CFLAGS-nldbl-fsub.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_dsubl.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_dsubl): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fsub, fsubl,
	dsubl, fMsubfN, fMsubfNx, fMxsubfN and fMxsubfNx.
	* math/auto-libm-test-in: Add tests of sub.
	* math/auto-libm-test-out-narrow-sub: New generated file.
	* math/libm-test-narrow-sub.inc: New file.
	* sysdeps/i386/fpu/s_f32xsubf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xsubf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fsub.c: Likewise.
	* sysdeps/ieee754/float128/s_f32subf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64subf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xsubf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xsubf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-dsub.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fsub.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_dsubl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fsub.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fsubl.c: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Update.
	* sysdeps/mach/hurd/i386/libm.abilist: Likewise.
	* 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/riscv/rv64/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/tilegx32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2018-03-20 00:34:52 +00:00
..
bits Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
include/bits Add canonicalize, canonicalizef, canonicalizel. 2016-10-26 23:14:31 +00:00
e_acoshl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_acosl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_asinl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_atan2l.c
e_atanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_coshl.c
e_exp10l.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_expl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_fmodl.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_gammal_r.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_hypotl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_ilogbl.c Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029). 2015-02-26 12:57:21 +00:00
e_j0l.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_j1l.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_jnl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_lgammal_r.c Use fabs(f/l) rather than __fabs 2017-09-29 18:54:24 +01:00
e_log2l.c Use fabs(f/l) rather than __fabs 2017-09-29 18:54:24 +01:00
e_log10l.c Use fabs(f/l) rather than __fabs 2017-09-29 18:54:24 +01:00
e_logl.c Remove unneeded declarations from math_private.h 2017-04-10 12:20:47 -03:00
e_powl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_remainderl.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
e_sinhl.c Fix ldbl-128ibm sinhl spurious overflows (bug 19350). 2015-12-09 22:37:08 +00:00
e_sqrtl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
gamma_productl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
ieee754.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_cosl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_sincosl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_sinl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_tanl.c Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
lgamma_negl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
lgamma_productl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
Makefile Add canonicalize, canonicalizef, canonicalizel. 2016-10-26 23:14:31 +00:00
math_ldbl.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpn2ldbl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
printf_fphex.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_asinhl.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
s_atanl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_cbrtl.c ldbl-128ibm: Automatic replacing of _Float128 and L() 2017-09-21 17:37:39 -03:00
s_ceill.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_copysignl.c
s_cosl.c
s_daddl.c Add narrowing add functions. 2018-02-10 02:08:43 +00:00
s_dsubl.c Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
s_erfl.c Remove unused variables 2016-01-27 09:30:16 +01:00
s_expm1l.c Fix ldbl-128ibm expm1l (sNaN) (bug 20233). 2016-06-09 17:24:52 +00:00
s_fabsl.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_faddl.c Add narrowing add functions. 2018-02-10 02:08:43 +00:00
s_finitel.c Reduce number of constants in __finite* (bug 15384). 2015-09-17 16:47:14 +00:00
s_floorl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_fmal.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fpclassifyl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_frexpl.c Fix frexp (NaN) (bug 20250). 2016-06-13 17:27:19 +00:00
s_fromfpl_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fromfpl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
s_fromfpxl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
s_fsubl.c Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
s_getpayloadl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_iscanonicall.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isinfl.c
s_isnanl.c
s_issignalingl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llrintl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_llroundl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_log1pl.c Fix ldbl-128ibm log1pl (-qNaN) spurious "invalid" exception (bug 22693). 2018-01-10 17:59:01 +00:00
s_logbl.c Work around powerpc32 integer 0 converting to -0 (bug 887, bug 19049, bug 19050). 2015-10-05 17:46:50 +00:00
s_lrintl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_lroundl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_modfl.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_nearbyintl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_nextafterl.c Fix ldbl-128ibm nextafterl, nexttowardl sign of zero result (bug 19678). 2016-02-19 17:19:53 +00:00
s_nexttoward.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +00:00
s_nexttowardf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_nextupl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_remquol.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_rintl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_roundevenl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_roundl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_scalblnl.c
s_scalbnl.c Make scalbn set errno (bug 6803). 2015-09-16 21:11:00 +00:00
s_setpayloadl_main.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_setpayloadl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
s_setpayloadsigl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
s_signbitl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sincosl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sinl.c
s_tanhl.c Fix ldbl-128ibm tanhl inaccuracy for small arguments (bug 19349). 2015-12-09 21:20:18 +00:00
s_tanl.c
s_totalorderl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_totalordermagl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_truncl.c Don't include math.h/math_private.h in math_ldbl_opt.h. 2018-03-10 15:18:08 -05:00
s_ufromfpl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
s_ufromfpxl.c Make more libm functions into weak aliases. 2017-09-14 22:28:53 +00:00
strtod_nan_ldouble.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
strtold_l.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_expl.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_sincosl.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-canonical-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-fmodl-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-fmodrem-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-remainderl-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-remquol-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
test-totalorderl-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
tst-strtold-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
x2y2m1l.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00