2013-10-18 21:03:40 +00:00
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/* Internal libc stuff for floating point environment routines. e500 version.
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Copyright (C) 2004-2013 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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<http://www.gnu.org/licenses/>. */
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#ifndef _FENV_LIBC_H
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#define _FENV_LIBC_H 1
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#include <fenv.h>
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2013-11-25 19:07:55 +00:00
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/* ldbl-128ibm code uses __fegetround. */
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#define __fegetround() fegetround ()
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2013-10-18 21:03:40 +00:00
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int __feraiseexcept_spe (int);
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libm_hidden_proto (__feraiseexcept_spe)
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int __fexcepts_to_spe (int);
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libm_hidden_proto (__fexcepts_to_spe)
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int __fexcepts_from_spe (int);
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libm_hidden_proto (__fexcepts_from_spe)
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int __fexcepts_to_prctl (int);
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libm_hidden_proto (__fexcepts_to_prctl)
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int __fexcepts_from_prctl (int);
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libm_hidden_proto (__fexcepts_from_prctl)
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void __fe_note_change (void);
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libm_hidden_proto (__fe_note_change)
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/* Equivalent to fegetenv, but returns an unsigned int instead of
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taking a pointer. */
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#define fegetenv_register() \
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({ unsigned int fscr; asm volatile ("mfspefscr %0" : "=r" (fscr)); fscr; })
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/* Equivalent to fesetenv, but takes an unsigned int instead of a
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pointer. */
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#define fesetenv_register(fscr) \
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({ asm volatile ("mtspefscr %0" : : "r" (fscr)); })
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typedef union
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{
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fenv_t fenv;
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unsigned int l[2];
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} fenv_union_t;
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/* Definitions of all the SPEFSCR bit numbers. */
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enum {
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SPEFSCR_SOVH = 0x80000000,
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SPEFSCR_OVH = 0x40000000,
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SPEFSCR_FGH = 0x20000000,
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SPEFSCR_FXH = 0x10000000,
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SPEFSCR_FINVH = 0x08000000,
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SPEFSCR_FDBZH = 0x04000000,
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SPEFSCR_FUNFH = 0x02000000,
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SPEFSCR_FOVFH = 0x01000000,
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/* 2 unused bits. */
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SPEFSCR_FINXS = 0x00200000,
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SPEFSCR_FINVS = 0x00100000,
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SPEFSCR_FDBZS = 0x00080000,
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SPEFSCR_FUNFS = 0x00040000,
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SPEFSCR_FOVFS = 0x00020000,
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/* Combination of the exception bits. */
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SPEFSCR_ALL_EXCEPT = 0x003e0000,
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SPEFSCR_MODE = 0x00010000,
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SPEFSCR_SOV = 0x00008000,
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SPEFSCR_OV = 0x00004000,
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SPEFSCR_FG = 0x00002000,
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SPEFSCR_FX = 0x00001000,
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SPEFSCR_FINV = 0x00000800,
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SPEFSCR_FDBZ = 0x00000400,
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SPEFSCR_FUNF = 0x00000200,
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SPEFSCR_FOVF = 0x00000100,
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/* 1 unused bit. */
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SPEFSCR_FINXE = 0x00000040,
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SPEFSCR_FINVE = 0x00000020,
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SPEFSCR_FDBZE = 0x00000010,
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SPEFSCR_FUNFE = 0x00000008,
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SPEFSCR_FOVFE = 0x00000004,
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/* Combination of the exception trap enable bits. */
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SPEFSCR_ALL_EXCEPT_ENABLE = 0x0000007c,
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SPEFSCR_FRMC = 0x00000003
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};
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#endif /* fenv_libc.h */
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