kc3-lang/gnulib/modules/float-h-tests

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• Hash : 6164b4cb
  Author :
  Date : 2025-07-08T17:34:25
  

  float-h: work around GCC bug 120993
  
  Also, fix a too-low LDBL_MAX on this platform, a problem that
  contributed to LDBL_NORM_MAX test failures with C23 PowerPC GCC
  with ibmlongdouble.
  * lib/float.c (gl_LDBL_MAX): On PowerPC with ibmlongdouble, the
  correct value is 2**1024 - 2**918, not 2**1024 - 2**971.  Also,
  use C99 hex double notation for the divisor, as it’s clearer and
  should work nowadays.
  * lib/float.in.h: Simplify by not worring whether it’s AIX or
  GNU/Linux when redefining LDBL_* macros on PowerPC GCC with
  ibmlongdouble, as the problem seems to be universal then.
  (LDBL_NORM_MAX): On PowerPC GCC with ibmlongdouble, define to be
  LDBL_MAX, so that it’s 2**1024 - 2**918, doubling GCC’s value
  if supplied.
  * modules/float-h-tests (Depends-on): Remove floorl, ldexpl.
  Add truncl.
  (test_float_h_LDADD): Likewise for libraries.
  * tests/test-float-h.c (test_isfinitel): New static function,
  so that we need not rely on isfinitel.
  (normalize_long_double): Work even if X is negative or not finite.
  Do not rely on frexpl or ldexpl.  Use truncl instead of floorl
  so that the negative results are consistent with positive.
  Defend against fritzy PowerPC long double arithmetic.
  

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• modules/float-h-tests

• Files:
  tests/test-float-h.c
  tests/macros.h
  
  Depends-on:
  fpieee
  fpucw
  frexpl
  isnanf-nolibm
  isnand-nolibm
  isnanl-nolibm
  truncl
  float-h-c++-tests
  
  configure.ac:
  
  Makefile.am:
  TESTS += test-float-h
  check_PROGRAMS += test-float-h
  test_float_h_LDADD = $(LDADD) @FREXPL_LIBM@ @TRUNCL_LIBM@
  

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