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c86ed71d63
This patch enables float128 support for x86_64 and x86. All GCC versions that can build glibc provide the required support, but since GCC 6 and before don't provide __builtin_nanq / __builtin_nansq, sNaN tests and some tests of NaN payloads need to be disabled with such compilers (this does not affect the generated glibc binaries at all, just the tests). bits/floatn.h declares float128 support to be available for GCC versions that provide the required libgcc support (4.3 for x86_64, 4.4 for i386 GNU/Linux, 4.5 for i386 GNU/Hurd); compilation-only support was present some time before then, but not really useful without the libgcc functions. fenv_private.h needed updating to avoid trying to put _Float128 values in registers. I make no assertion of optimality of the math_opt_barrier / math_force_eval definitions for this case; they are simply intended to be sufficient to work correctly. Tested for x86_64 and x86, with GCC 7 and GCC 6. (Testing for x32 was compilation tests only with build-many-glibcs.py to verify the ABI baseline updates. I have not done any testing for Hurd, although the float128 support is enabled there as for GNU/Linux.) * sysdeps/i386/Implies: Add ieee754/float128. * sysdeps/x86_64/Implies: Likewise. * sysdeps/x86/bits/floatn.h: New file. * sysdeps/x86/float128-abi.h: Likewise. * manual/math.texi (Mathematics): Document support for _Float128 on x86_64 and x86. * sysdeps/i386/fpu/fenv_private.h: Include <bits/floatn.h>. (math_opt_barrier): Do not put _Float128 values in floating-point registers. (math_force_eval): Likewise. [__x86_64__] (SET_RESTORE_ROUNDF128): New macro. * sysdeps/x86/fpu/Makefile [$(subdir) = math] (CPPFLAGS): Append to Makefile variable. * sysdeps/x86/fpu/e_sqrtf128.c: New file. * sysdeps/x86/fpu/sfp-machine.h: Likewise. Based on libgcc. * sysdeps/x86/math-tests.h: New file. * math/libm-test-support.h (XFAIL_FLOAT128_PAYLOAD): New macro. * math/libm-test-getpayload.inc (getpayload_test_data): Use XFAIL_FLOAT128_PAYLOAD. * math/libm-test-setpayload.inc (setpayload_test_data): Likewise. * math/libm-test-totalorder.inc (totalorder_test_data): Likewise. * math/libm-test-totalordermag.inc (totalordermag_test_data): Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise. * sysdeps/i386/fpu/libm-test-ulps: Likewise. * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise. |
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| .. | ||
| i686 | ||
| i786 | ||
| ____longjmp_chk.S | ||
| _exit.S | ||
| alphasort64.c | ||
| arch-fork.h | ||
| brk.c | ||
| c++-types.data | ||
| clone.S | ||
| configure | ||
| configure.ac | ||
| dl-librecon.h | ||
| dl-procinfo.h | ||
| dl-sysdep.h | ||
| fcntl.c | ||
| fxstat.c | ||
| fxstatat.c | ||
| get_clockfreq.c | ||
| getcontext.S | ||
| getdents64.c | ||
| getmsg.c | ||
| gettimeofday.c | ||
| glob64.c | ||
| Implies | ||
| init-first.c | ||
| kernel-features.h | ||
| ld.abilist | ||
| ldconfig.h | ||
| libanl.abilist | ||
| libBrokenLocale.abilist | ||
| libc-do-syscall.S | ||
| libc-lowlevellock.S | ||
| libc.abilist | ||
| libcrypt.abilist | ||
| libdl.abilist | ||
| libm.abilist | ||
| libnsl.abilist | ||
| libpthread.abilist | ||
| libresolv.abilist | ||
| librt.abilist | ||
| libthread_db.abilist | ||
| libutil.abilist | ||
| lll_timedlock_wait.c | ||
| lll_timedwait_tid.c | ||
| localplt.data | ||
| lockf64.c | ||
| lowlevellock.h | ||
| lowlevellock.S | ||
| lxstat.c | ||
| makecontext.S | ||
| Makefile | ||
| olddirent.h | ||
| profil-counter.h | ||
| putmsg.c | ||
| readdir64_r.c | ||
| readdir64.c | ||
| readelflib.c | ||
| register-dump.h | ||
| scandir64.c | ||
| setcontext.S | ||
| shlib-versions | ||
| sigaction.c | ||
| sigcontextinfo.h | ||
| smp.h | ||
| swapcontext.S | ||
| syscall.S | ||
| syscalls.list | ||
| sysdep-cancel.h | ||
| sysdep.c | ||
| sysdep.h | ||
| time.c | ||
| ucontext_i.sym | ||
| Versions | ||
| versionsort64.c | ||
| vfork.S | ||
| xstat.c | ||