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85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define __fenv_static
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#include "fenv.h"
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#ifdef __SPE__
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#include <sys/types.h>
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#include <machine/spr.h>
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#endif
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#ifdef __GNUC_GNU_INLINE__
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#error "This file must be compiled with C99 'inline' semantics"
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#endif
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#ifdef __SPE__
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const fenv_t __fe_dfl_env = SPEFSCR_DFLT;
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#else
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const fenv_t __fe_dfl_env = 0x00000000;
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#endif
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extern inline int feclearexcept(int __excepts);
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extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts);
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extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
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#ifndef __SPE__
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extern inline int feraiseexcept(int __excepts);
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#endif
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extern inline int fetestexcept(int __excepts);
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extern inline int fegetround(void);
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extern inline int fesetround(int __round);
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extern inline int fegetenv(fenv_t *__envp);
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extern inline int feholdexcept(fenv_t *__envp);
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extern inline int fesetenv(const fenv_t *__envp);
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extern inline int feupdateenv(const fenv_t *__envp);
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extern inline int feenableexcept(int __mask);
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extern inline int fedisableexcept(int __mask);
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#ifdef __SPE__
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#define PMAX 0x7f7fffff
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#define PMIN 0x00800000
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int feraiseexcept(int __excepts)
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{
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uint32_t spefscr;
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spefscr = mfspr(SPR_SPEFSCR);
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mtspr(SPR_SPEFSCR, spefscr | (__excepts & FE_ALL_EXCEPT));
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if (__excepts & FE_INVALID)
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__asm __volatile ("efsdiv %0, %0, %1" :: "r"(0), "r"(0));
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if (__excepts & FE_DIVBYZERO)
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__asm __volatile ("efsdiv %0, %0, %1" :: "r"(1.0f), "r"(0));
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if (__excepts & FE_UNDERFLOW)
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__asm __volatile ("efsmul %0, %0, %0" :: "r"(PMIN));
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if (__excepts & FE_OVERFLOW)
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__asm __volatile ("efsadd %0, %0, %0" :: "r"(PMAX));
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if (__excepts & FE_INEXACT)
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__asm __volatile ("efssub %0, %0, %1" :: "r"(PMIN), "r"(1.0f));
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return (0);
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}
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#endif
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