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.
At present, libm tests for each function get built into a single
executable (for each floating point type, for each of normal / inline
/ finite-math-only functions, plus vector variants) and run together,
resulting in a single PASS or FAIL (for each of those nine variants
plus vector variants). Building this executable involves reading
over 50 MB of libm-test-*.c sources.
This patch arranges for tests of each function to be run separately
from the makefiles instead. There are 121 functions being tested for
each (type, variant pair) (actually 126, but run as 121 from the
Makefile because each of the pairs (exp10, pow10), (isfinite, finite),
(lgamma, gamma), (remainder, drem), (scalbn, ldexp), shares a table of
test results and so is run together), so 1089 separate tests run from
the Makefile, plus 48 vector tests on x86_64 (six functions for eight
vector variants). Each test only involves a libm-test-<func>.c file
of no more than about 4 MB, rather than all such files taking about 50
MB. With tests run separately, test summaries will indicate which
functions actually have problems (of course, those problems may just
be out-of-date libm-test-ulps files if the file hasn't been updated
for the architecture in question recently).
All the .c files for the 1089+48 tests are generated automatically
from the Makefiles. Various checked-in boilerplate .c files are
removed as no longer needed. CFLAGS definitions for the different
kinds of tests are generated using makefile iterators to apply
target-specific variable settings. libm-have-vector-test.h is no
longer needed; the list of functions to test for each vector type is
now in the sysdeps Makefile.
This should reduce the amount of boilerplate needed for float128
testing support; test-float128.h will still be needed, but not various
.c files or Makefile CFLAGS definitions. The logic for creating
dependencies on libm-test-support-*.o files should also render
<https://sourceware.org/ml/libc-alpha/2017-02/msg00279.html>
unnecessary.
Tested for x86_64 and x86.
* math/Makefile (libm-tests-generated): Remove variable.
(libm-tests-base-normal): New variable.
(libm-tests-base-finite): Likewise.
(libm-tests-base-inline): Likewise.
(libm-tests-base): Likewise.
(libm-tests-normal): Likewise.
(libm-tests-finite): Likewise.
(libm-tests-inline): Likewise.
(libm-tests-vector): Likewise.
(libm-tests): Define in terms of these new variables.
(libm-tests-for-type): New variable.
(libm-tests.o): Move definition.
(tests): Move addition of $(libm-tests).
(generated): Update for new and removed libm test files.
($(objpfx)libm-test.c): Remove target.
($(objpfx)libm-have-vector-test.h): Likewise.
(CFLAGS-test-double-vlen2.c): Remove variable.
(CFLAGS-test-double-vlen4.c): Likewise.
(CFLAGS-test-double-vlen8.c): Likewise.
(CFLAGS-test-float-vlen4.c): Likewise.
(CFLAGS-test-float-vlen8.c): Likewise.
(CFLAGS-test-float-vlen16.c): Likewise.
(CFLAGS-test-float.c): Likewise.
(CFLAGS-test-float-finite.c): Likewise.
(CFLAGS-libm-test-support-float.c): Likewise.
(CFLAGS-test-double.c): Likewise.
(CFLAGS-test-double-finite.c): Likewise.
(CFLAGS-libm-test-support-double.c): Likewise.
(CFLAGS-test-ldouble.c): Likewise.
(CFLAGS-test-ldouble-finite.c): Likewise.
(CFLAGS-libm-test-support-ldouble.c): Likewise.
(libm-test-inline-cflags): New variable.
(CFLAGS-test-ifloat.c): Remove variable.
(CFLAGS-test-idouble.c): Likewise.
(CFLAGS-test-ildouble.c): Likewise.
($(addprefix $(objpfx), $(libm-tests.o))): Move target and update
dependencies.
($(foreach t,$(libm-tests-normal),$(objpfx)$(t).c)): New rule.
($(foreach t,$(libm-tests-finite),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(libm-tests-inline),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(libm-tests-vector),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(types),$(objpfx)libm-test-support-$(t).c)):
Likewise.
(dependencies on libm-test-support-*.o): Remove.
($(foreach f,$(libm-test-funcs-all),$(objpfx)$(o)-$(f).o)): New
rules using iterators.
($(addprefix $(objpfx),$(call libm-tests-for-type,$(o)))):
Likewise.
($(objpfx)libm-test-support-$(o).o): Likewise.
($(addprefix $(objpfx),$(filter-out $(tests-static)
$(libm-vec-tests),$(tests)))): Filter out $(libm-tests-vector)
instead.
($(addprefix $(objpfx), $(libm-vec-tests))): Use iterator to
define rule instead.
* math/README.libm-test: Update.
* math/libm-test-acos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-acosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-asin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-asinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atan2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cabs.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cacos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cacosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-canonicalize.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-carg.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-casin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-casinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-catan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-catanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cbrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ccos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ccosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ceil.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cexp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cimag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-clog.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-clog10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-conj.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-copysign.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cpow.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cproj.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-creal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csqrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ctan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ctanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-erf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-erfc.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-expm1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fabs.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fdim.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-floor.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmax.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmaxmag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fminmag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmod.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fpclassify.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-frexp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fromfp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fromfpx.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-getpayload.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-hypot.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ilogb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iscanonical.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iseqsig.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isfinite.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isgreater.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isgreaterequal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isinf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isless.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-islessequal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-islessgreater.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isnan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isnormal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-issignaling.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-issubnormal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isunordered.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iszero.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-j0.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-j1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-jn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lgamma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llogb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llrint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llround.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log1p.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-logb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lrint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lround.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-modf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nearbyint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextafter.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextdown.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nexttoward.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextup.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-pow.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-remainder.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-remquo.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-rint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-round.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-roundeven.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalbln.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalbn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-setpayload.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-setpayloadsig.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-signbit.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-significand.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sincos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sqrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tgamma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-totalorder.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-totalordermag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-trunc.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ufromfp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ufromfpx.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-y0.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-y1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-yn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-driver.c: Do not include libm-have-vector-test.h.
(HAVE_VECTOR): Remove macro.
(START): Do not call HAVE_VECTOR.
* math/test-double-vlen2.h (FUNC_TEST): Remove macro.
* math/test-double-vlen4.h (FUNC_TEST): Remove macro.
* math/test-double-vlen8.h (FUNC_TEST): Remove macro.
* math/test-float-vlen16.h (FUNC_TEST): Remove macro.
* math/test-float-vlen4.h (FUNC_TEST): Remove macro.
* math/test-float-vlen8.h (FUNC_TEST): Remove macro.
* math/test-math-vector.h (FUNC_TEST): New macro.
(WRAPPER_DECL): Rename to WRAPPER_DECL_f.
* sysdeps/x86_64/fpu/Makefile (double-vlen2-funcs): New variable.
(double-vlen4-funcs): Likewise.
(double-vlen4-avx2-funcs): Likewise.
(double-vlen8-funcs): Likewise.
(float-vlen4-funcs): Likewise.
(float-vlen8-funcs): Likewise.
(float-vlen8-avx2-funcs): Likewise.
(float-vlen16-funcs): Likewise.
(CFLAGS-test-double-vlen4-avx2.c): Remove variable.
(CFLAGS-test-float-vlen8-avx2.c): Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4.h (TEST_VECTOR_cos): Remove
macro.
(TEST_VECTOR_sin): Likewise.
(TEST_VECTOR_sincos): Likewise.
(TEST_VECTOR_log): Likewise.
(TEST_VECTOR_exp): Likewise.
(TEST_VECTOR_pow): Likewise.
* sysdeps/x86_64/fpu/test-double-vlen8.h (TEST_VECTOR_cos):
Likewise.
(TEST_VECTOR_sin): Likewise.
(TEST_VECTOR_sincos): Likewise.
(TEST_VECTOR_log): Likewise.
(TEST_VECTOR_exp): Likewise.
(TEST_VECTOR_pow): Likewise.
* sysdeps/x86_64/fpu/test-float-vlen16.h (TEST_VECTOR_cosf):
Likewise.
(TEST_VECTOR_sinf): Likewise.
(TEST_VECTOR_sincosf): Likewise.
(TEST_VECTOR_logf): Likewise.
(TEST_VECTOR_expf): Likewise.
(TEST_VECTOR_powf): Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8.h (TEST_VECTOR_cosf):
Likewise.
(TEST_VECTOR_sinf): Likewise.
(TEST_VECTOR_sincosf): Likewise.
(TEST_VECTOR_logf): Likewise.
(TEST_VECTOR_expf): Likewise.
(TEST_VECTOR_powf): Likewise.
* math/gen-libm-have-vector-test.sh: Remove file.
* math/libm-test.inc: Likewise.
* math/libm-test-support-double.c: Likewise.
* math/libm-test-support-float.c: Likewise.
* math/libm-test-support-ldouble.c: Likewise.
* math/test-double-finite.c: Likewise.: Likewise.
* math/test-double.c: Likewise.
* math/test-float-finite.c: Likewise.
* math/test-float.c: Likewise.
* math/test-idouble.c: Likewise.
* math/test-ifloat.c: Likewise.
* math/test-ildouble.c: Likewise.
* math/test-ldouble-finite.c: Likewise.
* math/test-ldouble.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen2.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen2.h: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4-avx2.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen8.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen16.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen4.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen4.h: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8-avx2.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8.c: Likewise.