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632a6cbe44
glibc/sysdeps/unix/sysv/linux/riscv
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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
..
bits Add MAP_SYNC from Linux 4.15. 2018-02-06 00:36:14 +00:00
rv64 Add narrowing divide functions. 2018-05-17 00:40:52 +00:00
sys RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
atomic-machine.h
clone.S
configure RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
configure.ac RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
dl-cache.h RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
dl-static.c RISC-V: Linux Startup and Dynamic Loading Code 2018-01-29 10:37:28 -08:00
flush-icache.c RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
getcontext.S RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
Implies RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
init-first.c RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
ipc_priv.h RISC-V: Add ipc_priv.h 2018-01-29 10:43:15 -08:00
kernel-features.h Refactor Linux ARCH_FORK implementation 2018-03-07 17:39:40 -03:00
ldconfig.h RISC-V: Linux Startup and Dynamic Loading Code 2018-01-29 10:37:28 -08:00
ldd-rewrite.sed RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
ldsodefs.h RISC-V: Linux Startup and Dynamic Loading Code 2018-01-29 10:37:28 -08:00
libc-vdso.h RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
localplt.data RISC-V: Add ABI Lists 2018-01-29 10:37:28 -08:00
makecontext.c RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
Makefile RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
profil-counter.h
pt-vfork.S
readelflib.c [RISC-V] Fix parsing flags in ELF64 files. 2018-02-09 18:51:32 -05:00
register-dump.h RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
setcontext.S RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
shlib-versions RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
sigcontextinfo.h Remove unused frame.h header, sigcontextinfo.h macros. 2018-03-22 16:40:51 +00:00
swapcontext.S RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
syscall.c
sysdep.h
sysdep.S
ucontext_i.sym RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
ucontext-macros.h RISC-V: Linux ABI 2018-01-29 10:37:27 -08:00
Versions RISC-V: Build Infastructure 2018-01-29 10:43:15 -08:00
vfork.S