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8d3f9e85cf
glibc/sysdeps/i386/fpu
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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
..
doasin.c
e_acos.S
e_acosf.S
e_acosh.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_acoshf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_acoshl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_acosl.c
e_asin.S
e_asinf.S
e_atan2.S
e_atan2f.S
e_atan2l.c
e_atanh.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_atanhf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_atanhl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_exp2.S
e_exp2l.S
e_exp10.S
e_exp10f.S
e_exp10l.S
e_exp.S
e_expl.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
e_fmod.S
e_fmodf.S
e_fmodl.c
e_hypot.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_hypotf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_ilogb.S
e_ilogbf.S
e_ilogbl.S
e_log2.S
e_log2l.S
e_log10.S
e_log10f.S
e_log10l.S
e_log.S
e_logl.S
e_pow.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_powl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_rem_pio2.c
e_remainder.S
e_remainderf.S
e_remainderl.S
e_scalb.S
e_scalbf.S
e_scalbl.S
e_sqrt.S
e_sqrtf.S
e_sqrtl.c
fclrexcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fedisblxcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
feenablxcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fegetenv.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fegetexcept.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fegetmode.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fegetround.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
feholdexcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fenv_private.h Fix i386 fenv_private.h float128 for 32-bit --with-fpmath=sse (bug 22902). 2018-02-28 21:55:51 +00:00
fesetenv.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fesetexcept.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fesetmode.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fesetround.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
feupdateenv.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fgetexcptflg.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fraiseexcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fsetexcptflg.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
ftestexcept.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
i386-math-asm.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
Implies
libm-test-ulps Update i386 libm-test-ulps. 2018-03-16 17:43:38 +00:00
libm-test-ulps-name
math_private.h
math-tests.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
mpatan2.c
mpatan.c
mpsqrt.c
s_asinh.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_asinhf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_asinhl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_atan.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_atanf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_atanl.c Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_cbrt.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_cbrtf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_cbrtl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_ceil.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_ceilf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_ceill.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_copysign.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_copysignf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_copysignl.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_expm1.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_expm1f.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_expm1l.S
s_f32xaddf64.c Add narrowing add functions. 2018-02-10 02:08:43 +00:00
s_f32xsubf64.c Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
s_fabs.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_fabsf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_fabsl.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_fdim.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_finite.S
s_finitef.S
s_finitel.S
s_floor.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_floorf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_floorl.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_fmax.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fmaxf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fmaxl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fmin.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fminf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fminl.S 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_frexp.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_frexpf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_frexpl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isinfl.c
s_isnanl.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_llrint.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llrintf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_llrintl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_log1p.S
s_log1pf.S
s_log1pl.S
s_logb.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_logbf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_logbl.c Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_lrint.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_lrintf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_lrintl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_nearbyint.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_nearbyintf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_nearbyintl.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_nextafterl.c Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_nexttoward.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_nexttowardf.c Consistently use uintN_t not u_intN_t in libm. 2017-08-03 19:55:04 +00:00
s_remquo.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_remquof.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_remquol.S Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_rint.S Use libm_alias_double for i386. 2017-11-28 18:15:44 +00:00
s_rintf.S Use libm_alias_float for i386. 2017-11-29 00:10:35 +00:00
s_rintl.c Use libm_alias_ldouble in sysdeps/i386/fpu. 2017-11-17 22:54:39 +00:00
s_scalbln.c
s_scalblnf.c
s_scalblnl.c
s_scalbn.S
s_scalbnf.S
s_scalbnl.S
s_significand.S
s_significandf.S
s_significandl.c
s_trunc.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_truncf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_truncl.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_exp.c
Versions
w_sqrt_compat.c Add support for sqrt asm redirects 2018-03-15 19:21:35 +00:00
w_sqrt.c Add support for sqrt asm redirects 2018-03-15 19:21:35 +00:00