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Diffstat (limited to 'sysdeps/alpha/fpu/cfloat-compat.h')
-rw-r--r-- | sysdeps/alpha/fpu/cfloat-compat.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/sysdeps/alpha/fpu/cfloat-compat.h b/sysdeps/alpha/fpu/cfloat-compat.h new file mode 100644 index 0000000..cb40f55 --- /dev/null +++ b/sysdeps/alpha/fpu/cfloat-compat.h @@ -0,0 +1,74 @@ +/* Compatibility macros for old and new Alpha complex float ABI. + Copyright (C) 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* The behaviour of complex float changed between GCC 3.3 and 3.4. + + In 3.3 and before (below, complex version 1, or "c1"), complex float + values were packed into one floating point register. + + In 3.4 and later (below, complex version 2, or "c2"), GCC changed to + follow the official Tru64 ABI, which passes the components of a complex + as separate parameters. */ + +#if __GNUC_PREREQ(3,4) + typedef union { double d; _Complex float cf; } c1_compat; +# define c1_cfloat_decl(x) double x +# define c1_cfloat_real(x) __real__ c1_cfloat_value (x) +# define c1_cfloat_imag(x) __imag__ c1_cfloat_value (x) +# define c1_cfloat_value(x) (((c1_compat *)(void *)&x)->cf) +# define c1_cfloat_rettype double +# define c1_cfloat_return(x) ({ c1_compat _; _.cf = (x); _.d; }) +# define c2_cfloat_decl(x) _Complex float x +# define c2_cfloat_real(x) __real__ x +# define c2_cfloat_imag(x) __imag__ x +# define c2_cfloat_value(x) x +# define c2_cfloat_rettype _Complex float +# define c2_cfloat_return(x) x +#else +# define c1_cfloat_decl(x) _Complex float x +# define c1_cfloat_real(x) __real__ x +# define c1_cfloat_imag(x) __imag__ x +# define c1_cfloat_value(x) x +# define c1_cfloat_rettype _Complex float +# define c1_cfloat_return(x) x +# define c2_cfloat_decl(x) float x ## r, float x ## i +# define c2_cfloat_real(x) x ## r +# define c2_cfloat_imag(x) x ## i +# define c2_cfloat_value(x) \ + ({ _Complex float _; __real__ _ = x##r; __imag__ _ = x##i; _; }) +# define c2_cfloat_rettype double _Complex +# define c2_cfloat_return(x) x +#endif + +/* Get the proper symbol versions defined for each function. */ + +#include <shlib-compat.h> + +#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_3_3) +#define cfloat_versions_compat(func) \ + compat_symbol (libm, __c1_##func, func, GLIBC_2_1) +#else +#define cfloat_versions_compat(func) +#endif + +#define cfloat_versions(func) \ + cfloat_versions_compat(func); \ + versioned_symbol (libm, __c2_##func, func, GLIBC_2_3_3); \ + extern typeof(__c2_##func) __##func attribute_hidden; \ + strong_alias (__c2_##func, __##func) |