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Diffstat (limited to 'libm/alpha/fenv.c')
| -rw-r--r-- | libm/alpha/fenv.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/libm/alpha/fenv.c b/libm/alpha/fenv.c deleted file mode 100644 index e8ab204..0000000 --- a/libm/alpha/fenv.c +++ /dev/null @@ -1,144 +0,0 @@ -/*- - * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD: src/lib/msun/alpha/fenv.c,v 1.2 2005/03/16 19:03:44 das Exp $ - */ - -#include <sys/cdefs.h> -#include <machine/sysarch.h> -#include <fenv.h> - -const fenv_t __fe_dfl_env = 0x680e000000000000ULL; - -struct mask_args { - fenv_t mask; -}; - -/* - * The lower 49 bits of the FPCR are unused by the hardware, so we use - * the lower order bits to store the kernel's idea of the FP mask as - * described in the Alpha Architecture Manual. - */ -int -fegetenv(fenv_t *envp) -{ - struct mask_args p; - union __fpcr r; - - /* - * The syscall acts as an implicit exception barrier, so we - * only need to issue an excb after the mf_fpcr to ensure that - * the read is executed before any subsequent FP ops. - */ - sysarch(ALPHA_GET_FPMASK, (char *)&p); - __mf_fpcr(&r.__d); - *envp = r.__bits | p.mask; - __excb(); - return (0); -} - -int -feholdexcept(fenv_t *envp) -{ - struct mask_args p; - union __fpcr r; - - sysarch(ALPHA_GET_FPMASK, (char *)&p); - __mf_fpcr(&r.__d); - *envp = r.__bits | p.mask; - r.__bits &= ~((fenv_t)FE_ALL_EXCEPT << _FPUSW_SHIFT); - __mt_fpcr(r.__d); - if (p.mask & FE_ALL_EXCEPT) { - p.mask = 0; - sysarch(ALPHA_SET_FPMASK, &p); - } - __excb(); - return (0); -} - -int -fesetenv(const fenv_t *envp) -{ - struct mask_args p; - union __fpcr r; - - p.mask = *envp & FE_ALL_EXCEPT; - sysarch(ALPHA_SET_FPMASK, &p); - r.__bits = *envp & ~FE_ALL_EXCEPT; - __mt_fpcr(r.__d); - __excb(); - return (0); -} - -int -feupdateenv(const fenv_t *envp) -{ - struct mask_args p; - union __fpcr oldr, newr; - - p.mask = *envp & FE_ALL_EXCEPT; - sysarch(ALPHA_SET_FPMASK, &p); - __mf_fpcr(&oldr.__d); - newr.__bits = *envp & ~FE_ALL_EXCEPT; - __excb(); - __mt_fpcr(newr.__d); - feraiseexcept((oldr.__bits >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); - return (0); -} - -int -__feenableexcept(int mask) -{ - struct mask_args p; - - sysarch(ALPHA_GET_FPMASK, &p); - p.mask |= (mask & FE_ALL_EXCEPT); - sysarch(ALPHA_SET_FPMASK, &p); - return (p.mask); -} - -int -__fedisableexcept(int mask) -{ - struct mask_args p; - - sysarch(ALPHA_GET_FPMASK, &p); - p.mask &= ~(mask & FE_ALL_EXCEPT); - sysarch(ALPHA_SET_FPMASK, &p); - return (p.mask); -} - -int -__fegetexcept(void) -{ - struct mask_args p; - - sysarch(ALPHA_GET_FPMASK, &p); - return (p.mask); -} - -__weak_reference(__feenableexcept, feenableexcept); -__weak_reference(__fedisableexcept, fedisableexcept); -__weak_reference(__fegetexcept, fegetexcept); |