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898c62f488
On powerpc, floating-point environment macros are defined as pointers to constants in the library that contain the bit-patterns of the desired environment, instead of being magic constants cast to pointer type. For soft-float, the bit-patterns used for fenv_t are not laid out the same as for hard-float. (e500 has a third layout used; that's not an ABI issue because these values are only meaningful within a single process, all of whose glibc libraries must come from the same build of glibc.) While the __fe_dfl_env value for soft-float was appropriate for the soft-float fenv_t representation, the other two constants had the same bit-patterns as for hard-float. Those bit patterns had the effect of having exceptions already raised, causing math/test-fenv-return to fail; this patch fixes the patterns used. (__fe_nonieee_env also had exceptions unmasked, though they should be masked to match hard-float semantics. Since there is no separate non-IEEE mode for soft-float, it's most appropriate for __fe_nonieee_env to be the same as __fe_dfl_env; this patch makes it an alias.) Tested for powerpc-nofpu. [BZ #17261] * sysdeps/powerpc/nofpu/fenv_const.c (__fe_enabled_env): Change value to 0. (__fe_nonieee_env): Define as an alias for __fe_dfl_env.
35 lines
1.5 KiB
C
35 lines
1.5 KiB
C
/* Constants for fenv_bits.h (soft float edition).
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Copyright (C) 2002-2014 Free Software Foundation, Inc.
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Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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/* We want to specify the bit pattern of the __fe_*_env constants, so
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pretend they're really `long long' instead of `double'. */
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/* If the default argument is used we use this value. Disable all
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signalling exceptions as default. */
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const unsigned long long __fe_dfl_env __attribute__ ((aligned (8))) =
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0x000000003e000000ULL;
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/* Floating-point environment where none of the exceptions are masked. */
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const unsigned long long __fe_enabled_env __attribute__ ((aligned (8))) =
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0x0000000000000000ULL;
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/* Floating-point environment with the NI bit set. No difference for
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soft float from the default environment. */
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strong_alias (__fe_dfl_env, __fe_nonieee_env)
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