glibc

Tree: e6b4e2de6d

Joseph Myers c86ed71d63 Add float128 support for x86_64, x86. 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.		9 years ago
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bits	Add float128 support for x86_64, x86.	9 years ago
fpu	Add float128 support for x86_64, x86.	9 years ago
nptl/bits	Move shared pthread definitions to common headers	9 years ago
Makefile	Remove x86 ifunc-defines.sym and rtld-global-offsets.sym	10 years ago
Versions	Add _dl_x86_cpu_features to rtld_global	11 years ago
cacheinfo.c	tunables: Add IFUNC selection and cache sizes	9 years ago
cpu-features-offsets.sym	Remove x86 ifunc-defines.sym and rtld-global-offsets.sym	10 years ago
cpu-features.c	x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps	9 years ago
cpu-features.h	x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps	9 years ago
cpu-tunables.c	x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps	9 years ago
dl-get-cpu-features.c	Update copyright dates with scripts/update-copyrights.	9 years ago
dl-hwcap.h	x86: Set dl_platform and dl_hwcap from CPU features [BZ #21391]	9 years ago
dl-procinfo.c	x86: Set dl_platform and dl_hwcap from CPU features [BZ #21391]	9 years ago
dl-procinfo.h	x86: Set dl_platform and dl_hwcap from CPU features [BZ #21391]	9 years ago
dl-tunables.list	x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps	9 years ago
elide.h	Update copyright dates with scripts/update-copyrights.	9 years ago
float128-abi.h	Add float128 support for x86_64, x86.	9 years ago
fpu_control.h	Update copyright dates with scripts/update-copyrights.	9 years ago
init-arch.h	x86: Add macros to implement ifunce selection in C	9 years ago
libc-start.c	Delay initialization of CPU features struct in static binaries	9 years ago
linkmap.h	Rename bits/linkmap.h to linkmap.h (bug 14912).	11 years ago
math-tests.h	Add float128 support for x86_64, x86.	9 years ago
string_private.h	Update copyright dates with scripts/update-copyrights.	9 years ago
tininess.h	Use sysdeps/x86/tininess.h for i386 and x86_64	14 years ago
tst-get-cpu-features-static.c	Add _dl_x86_cpu_features to rtld_global	11 years ago
tst-get-cpu-features.c	Update copyright dates with scripts/update-copyrights.	9 years ago