Add an fenv.h implementation for the ia64 port.
Reviewed by: standards@
This commit is contained in:
David Schultz
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0b71a226d1
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50c4f20324
49
lib/msun/ia64/fenv.c
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49
lib/msun/ia64/fenv.c
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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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <fenv.h>
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const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL;
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/*
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* It doesn't pay to inline feupdateenv() because it includes one of
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* the rare uses of feraiseexcept() where the argument is not a
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* constant. Thus, no dead code elimination can occur, resulting in
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* significant bloat.
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*/
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int
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feupdateenv(const fenv_t *envp)
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{
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fenv_t fpsr;
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__stfpsr(&fpsr);
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__ldfpsr(*envp);
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feraiseexcept(fpsr & FE_ALL_EXCEPT);
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return (0);
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}
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231
lib/msun/ia64/fenv.h
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231
lib/msun/ia64/fenv.h
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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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* $FreeBSD$
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*/
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#ifndef _FENV_H_
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#define _FENV_H_
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#include <sys/_types.h>
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typedef __uint64_t fenv_t;
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typedef __uint16_t fexcept_t;
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/* Exception flags */
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#define FE_INVALID 0x01
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#define FE_DENORMAL 0x02
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#define FE_DIVBYZERO 0x04
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#define FE_OVERFLOW 0x08
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#define FE_UNDERFLOW 0x10
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#define FE_INEXACT 0x20
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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/* Rounding modes */
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#define FE_TONEAREST 0x0000
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#define FE_DOWNWARD 0x0400
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#define FE_UPWARD 0x0800
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#define FE_TOWARDZERO 0x0c00
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#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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FE_UPWARD | FE_TOWARDZERO)
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__BEGIN_DECLS
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/* Default floating-point environment */
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extern const fenv_t __fe_dfl_env;
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#define FE_DFL_ENV (&__fe_dfl_env)
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#define _FPUSW_SHIFT 13
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#define __stfpsr(__r) __asm("mov %0=ar.fpsr" : "=r" (*(__r)))
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#define __ldfpsr(__r) __asm __volatile("mov ar.fpsr=%0" : : "r" (__r))
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static __inline int
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feclearexcept(int __excepts)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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__fpsr &= ~((fenv_t)__excepts << _FPUSW_SHIFT);
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__ldfpsr(__fpsr);
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return (0);
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}
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static __inline int
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fegetexceptflag(fexcept_t *__flagp, int __excepts)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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*__flagp = (fexcept_t)(__fpsr >> _FPUSW_SHIFT) & __excepts;
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return (0);
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}
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static __inline int
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fesetexceptflag(const fexcept_t *__flagp, int __excepts)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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__fpsr &= ~((fenv_t)__excepts << _FPUSW_SHIFT);
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__fpsr |= (fenv_t)(__excepts & *__flagp) << _FPUSW_SHIFT;
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__ldfpsr(__fpsr);
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return (0);
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}
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/*
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* It is worthwhile to use the inline version of this function iff it
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* is called with arguments that are compile-time constants (due to
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* dead code elimination). Unfortunately, gcc isn't smart enough to
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* figure this out automatically, and there's no way to tell it.
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* We assume that constant arguments will be the common case.
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*/
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static __inline int
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feraiseexcept(int __excepts)
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{
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volatile double d;
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/*
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* With a compiler that supports the FENV_ACCESS pragma
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* properly, simple expressions like '0.0 / 0.0' should
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* be sufficient to generate traps. Unfortunately, we
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* need to bring a volatile variable into the equation
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* to prevent incorrect optimizations.
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*/
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if (__excepts & FE_INVALID) {
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d = 0.0;
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d = 0.0 / d;
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}
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if (__excepts & FE_DIVBYZERO) {
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d = 0.0;
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d = 1.0 / d;
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}
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if (__excepts & FE_OVERFLOW) {
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d = 0x1.ffp1023;
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d *= 2.0;
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}
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if (__excepts & FE_UNDERFLOW) {
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d = 0x1p-1022;
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d /= 0x1p1023;
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}
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if (__excepts & FE_INEXACT) {
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d = 0x1p-1022;
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d += 1.0;
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}
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return (0);
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}
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static __inline int
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fetestexcept(int __excepts)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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return ((__fpsr >> _FPUSW_SHIFT) & __excepts);
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}
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static __inline int
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fegetround(void)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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return (__fpsr & _ROUND_MASK);
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}
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static __inline int
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fesetround(int __round)
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{
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fenv_t __fpsr;
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if (__round & ~_ROUND_MASK)
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return (-1);
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__stfpsr(&__fpsr);
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__fpsr &= ~_ROUND_MASK;
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__fpsr |= __round;
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__ldfpsr(__fpsr);
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return (0);
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}
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static __inline int
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fegetenv(fenv_t *__envp)
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{
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__stfpsr(__envp);
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return (0);
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}
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static __inline int
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feholdexcept(fenv_t *__envp)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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*__envp = __fpsr;
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__fpsr &= ~((fenv_t)FE_ALL_EXCEPT << _FPUSW_SHIFT);
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__fpsr |= FE_ALL_EXCEPT;
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__ldfpsr(__fpsr);
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return (0);
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}
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static __inline int
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fesetenv(const fenv_t *__envp)
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{
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__ldfpsr(*__envp);
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return (0);
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}
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int feupdateenv(const fenv_t *__envp);
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#if __BSD_VISIBLE
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static __inline int
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fesetmask(int __mask)
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{
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fenv_t __newfpsr, __oldfpsr;
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__stfpsr(&__oldfpsr);
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__newfpsr = (__oldfpsr | FE_ALL_EXCEPT) & ~__mask;
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__ldfpsr(__newfpsr);
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return (~__oldfpsr & FE_ALL_EXCEPT);
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}
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static __inline int
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fegetmask(void)
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{
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fenv_t __fpsr;
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__stfpsr(&__fpsr);
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return (~__fpsr & FE_ALL_EXCEPT);
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}
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#endif /* __BSD_VISIBLE */
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__END_DECLS
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#endif /* !_FENV_H_ */
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