61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
/* Compatibility macros for old and new Alpha complex float ABI.
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Copyright (C) 2004-2022 Free Software Foundation, Inc.
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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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<https://www.gnu.org/licenses/>. */
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/* The behaviour of complex float changed between GCC 3.3 and 3.4.
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In 3.3 and before (below, complex version 1, or "c1"), complex float
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values were packed into one floating point register.
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In 3.4 and later (below, complex version 2, or "c2"), GCC changed to
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follow the official Tru64 ABI, which passes the components of a complex
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as separate parameters. */
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typedef union { double d; _Complex float cf; } c1_compat;
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# define c1_cfloat_decl(x) double x
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# define c1_cfloat_real(x) __real__ c1_cfloat_value (x)
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# define c1_cfloat_imag(x) __imag__ c1_cfloat_value (x)
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# define c1_cfloat_value(x) (((c1_compat *)(void *)&x)->cf)
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# define c1_cfloat_rettype double
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# define c1_cfloat_return(x) ({ c1_compat _; _.cf = (x); _.d; })
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# define c2_cfloat_decl(x) _Complex float x
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# define c2_cfloat_real(x) __real__ x
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# define c2_cfloat_imag(x) __imag__ x
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# define c2_cfloat_value(x) x
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# define c2_cfloat_rettype _Complex float
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# define c2_cfloat_return(x) x
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/* Get the proper symbol versions defined for each function. */
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#include <shlib-compat.h>
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#include <libm-alias-float.h>
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#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_3_4)
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#define cfloat_versions_compat(func) \
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compat_symbol (libm, __c1_##func, func, GLIBC_2_1)
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#else
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#define cfloat_versions_compat(func)
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#endif
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#define cfloat_versions(func) \
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cfloat_versions_compat(func##f); \
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versioned_symbol (libm, __c2_##func##f, func##f, GLIBC_2_3_4); \
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extern typeof(__c2_##func##f) __##func##f attribute_hidden; \
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strong_alias (__c2_##func##f, __##func##f); \
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libm_alias_float_other (__##func, func)
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