tests: Add test for remquo

This test currently fails, because remquo has bugs. (A bugfix will be
committed soon.) Test vectors derived from results from code by
Charles Karney in GeodesicLib/proj,

tests: Add test for remquo

This test currently fails, because remquo has bugs. (A bugfix will be
committed soon.) Test vectors derived from results from code by
Charles Karney in GeodesicLib/proj, and manually inspected.

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math.h: Add math_errhandling, MATH_ERRNO, MATH_ERREXCEPT.

XXX Should maybe put a __math_errhandling in machine/math.h, but only
VAX uses MATH_ERRNO and that's not likely to change any time soon, so

math.h: Add math_errhandling, MATH_ERRNO, MATH_ERREXCEPT.

XXX Should maybe put a __math_errhandling in machine/math.h, but only
VAX uses MATH_ERRNO and that's not likely to change any time soon, so
this will serve for now with less churn.

PR standards/56234: missing C99 frobs in <math.h>

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tests/lib/libm: Test nextafter/nexttoward and variants.

The tests are fairly trivial but should work without any conditionals
about floating-point formats.

Add sincos{,f,l} from FreeBSD

fix build of t_cabsl from t_cabsl.cxx

t_cabsl source is in t_cabsl.cxx not t_cabsl.cc - the latter
is what bsd.tests.mk defaults to.

This only broke after my commit of share/mk/bsd.dep.mk rev 1.85

fix build of t_cabsl from t_cabsl.cxx

t_cabsl source is in t_cabsl.cxx not t_cabsl.cc - the latter
is what bsd.tests.mk defaults to.

This only broke after my commit of share/mk/bsd.dep.mk rev 1.85
but I don't know why it didn't cause a problem previously.

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Add a test case for signbit.
(paranoia prior to a libm change)

Build libm tests with -fno-builtin.

This way they test libm, not whatever the compiler does.

We should _also_ have automatic integration tests for what the
compiler does, as a separate thing.

Add test case for PR lib/50646.

Make sure that cabsl (aka __c99_cabsl) is usable from C++.

Blindly add __TEST_FENV in the hope of fixing the vax build.

(So we can include fenv.h, and then not use it - we ifdef vax out
for OS-portability reasons.)

define __TEST_FENV in the makefile for t_fe_round
should fix vax build (it doesn't have fenv.h)

add test for fesetround/fegetround that uses lrint (and tests it a bunch).
It doesn't fail on amd64.

Add failing test for casinh

portability fixes

add failing test for PR lib/51427
ilogb(INFINITY)=-INT_MAX, it should be INT_MAX

while here, test raised exceptions, other values.

XXX some platforms don't have exceptions

Add some tests of hypot() and hypotf()

add __TEST_FENV

put have fenv stuff elsewhere.

Sync list of fenv enabled architectures again (PR 48633), this time for mips
addition.

While PR 48633 is not properly fixed, keep the additional lists of
fenv-enabled architectures in sync.

Remove stale comment about ARM fenv support.

Mark the lib/libm/t_fmod test as an expected failure under QEMU,
with a reference to PR misc/44767.

Enable fenv.h on arm again

fenv(3) support for hppa

Disabel fenv tests for arm, the implementation is incomplete.

Add a test program for basic fenv.h rounding mode/exception mask testing.