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Joseph Myers 632a6cbe44 Add narrowing divide functions. 
This patch adds the narrowing divide functions from TS 18661-1 to
glibc's libm: fdiv, fdivl, ddivl, f32divf64, f32divf32x, f32xdivf64
for all configurations; f32divf64x, f32divf128, f64divf64x,
f64divf128, f32xdivf64x, f32xdivf128, f64xdivf128 for configurations
with _Float64x and _Float128; __nldbl_ddivl for ldbl-opt.

The changes are mostly essentially the same as for the other narrowing
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 div.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing divide functions.
	* math/bits/mathcalls-narrow.h (div): Use __MATHCALL_NARROW.
	* math/gen-auto-libm-tests.c (test_functions): Add div.
	* math/math-narrow.h (CHECK_NARROW_DIV): New macro.
	(NARROW_DIV_ROUND_TO_ODD): Likewise.
	(NARROW_DIV_TRIVIAL): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__fdivl): New
	macro.
	(__ddivl): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fdiv and
	ddiv.
	(CFLAGS-nldbl-ddiv.c): New variable.
	(CFLAGS-nldbl-fdiv.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_ddivl.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_ddivl): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fdiv, fdivl,
	ddivl, fMdivfN, fMdivfNx, fMxdivfN and fMxdivfNx.
	* math/auto-libm-test-in: Add tests of div.
	* math/auto-libm-test-out-narrow-div: New generated file.
	* math/libm-test-narrow-div.inc: New file.
	* sysdeps/i386/fpu/s_f32xdivf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xdivf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fdiv.c: Likewise.
	* sysdeps/ieee754/float128/s_f32divf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64divf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xdivf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xdivf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-ddiv.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fdiv.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_ddivl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fdiv.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fdivl.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/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 		2018-05-17 00:40:52 +00:00
..
Makefile Link extra-libs consistently with libc and ld.so. 2013-05-31 16:16:33 +00:00
e_hypot.c Move math_check_force_underflow macros to separate math-underflow.h. 2018-05-10 00:53:04 +00:00
e_hypotf.c Rename all __ieee754_sqrt(f/l) calls to sqrt(f/l) 2018-03-15 19:21:36 +00:00
e_rem_pio2f.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_sqrt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
e_sqrtf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fclrexcpt.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fe_mask.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fe_nomask.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_const.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fenv_libc.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
fenv_private.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +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
fix-fp-int-compare-invalid.h 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
k_cosf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_rem_pio2f.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
k_sinf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
libm-test-ulps Add narrowing divide functions. 2018-05-17 00:40:52 +00:00
libm-test-ulps-name Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139). 2016-11-04 16:49:06 +00:00
math-barriers.h Move math_opt_barrier, math_force_eval to separate math-barriers.h. 2018-05-09 19:45:47 +00:00
math_ldbl.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
math_private.h Move math_opt_barrier, math_force_eval to separate math-barriers.h. 2018-05-09 19:45:47 +00:00
s_cosf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fabs.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fabsf.S
…
s_float_bitwise.h Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fma.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_fmaf.S Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isnan.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_isnanf.S
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s_lrintf.S
…
s_rint.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_rintf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
s_sinf.c Update copyright dates with scripts/update-copyrights. 2018-01-01 00:32:25 +00:00
t_sqrt.c Remove trailing whitespace. 2013-06-05 20:44:03 +00:00
tst-setcontext-fpscr.c Use xmalloc in tst-setcontext-fpscr.c (bug 19668). 2018-02-06 21:32:53 +00:00