arm: Fix fenv support
The previous fenv support for ARM used the soft-float implementation of FreeBSD. Newlib uses the one from libgcc by default. They are not compatible. Having an GCC incompatible soft-float fenv support in Newlib makes no sense. A long-term solution could be to provide a libgcc compatible soft-float support. This likely requires changes in the GCC configuration. For now, provide a stub implementation for soft-float multilibs similar to RISC-V. Move implementation to one file and delete now unused files. Hide implementation details. Remove function parameter names from header file to avoid name conflicts. Provide VFP support if __SOFTFP__ is not defined like glibc. Reviewed-by: Sebastian Huber <sebastian.huber@embedded-brains.de> Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
This commit is contained in:
Eshan dhawan
committed by
Sebastian Huber
Sebastian Huber
parent
7b1416c3ab
commit
b7a6e02dc6
@@ -1,53 +0,0 @@
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/*-
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* Copyright (c) 2013 Andrew Turner <andrew@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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#ifdef _FENV_MANGLE_H_
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#error Only include fenv-mangle.h once
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#endif
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#define _FENV_MANGLE_H_
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#ifndef FENV_MANGLE
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#error FENV_MANGLE is undefined
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#endif
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#define feclearexcept FENV_MANGLE(feclearexcept)
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#define fegetexceptflag FENV_MANGLE(fegetexceptflag)
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#define fesetexceptflag FENV_MANGLE(fesetexceptflag)
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#define feraiseexcept FENV_MANGLE(feraiseexcept)
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#define fetestexcept FENV_MANGLE(fetestexcept)
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#define fegetround FENV_MANGLE(fegetround)
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#define fesetround FENV_MANGLE(fesetround)
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#define fegetenv FENV_MANGLE(fegetenv)
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#define feholdexcept FENV_MANGLE(feholdexcept)
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#define fesetenv FENV_MANGLE(fesetenv)
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#define feupdateenv FENV_MANGLE(feupdateenv)
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#define feenableexcept FENV_MANGLE(feenableexcept)
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#define fedisableexcept FENV_MANGLE(fedisableexcept)
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#define fegetexcept FENV_MANGLE(fegetexcept)
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@@ -1,187 +0,0 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2004-2011 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 _SYS_FENV_H_
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#error "This file is meant to be included only by <sys/fenv.h>."
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#endif
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/* the file can be added from architecture specific fenv.h file found in
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*libc/sys/arch/sys *
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*
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* This file implements the functionality of <fenv.h> on platforms that
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* lack an FPU and use softfloat in libc for floating point. To use it,
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* you must write an <fenv.h> that provides the following:
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*
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* - a typedef for fenv_t, which may be an integer or struct type
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* - a typedef for fexcept_t (XXX This file assumes fexcept_t is a
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* simple integer type containing the exception mask.)
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* - definitions of FE_* constants for the five exceptions and four
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* rounding modes in IEEE 754, as described in fenv(3)
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* - a definition, and the corresponding external symbol, for FE_DFL_ENV
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* - a macro __set_env(env, flags, mask, rnd), which sets the given fenv_t
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* from the exception flags, mask, and rounding mode
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* - macros __env_flags(env), __env_mask(env), and __env_round(env), which
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* extract fields from an fenv_t
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* - a definition of __fenv_static
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*
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* If the architecture supports an optional FPU, it's recommended that you
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* define fenv_t and fexcept_t to match the hardware ABI. Otherwise, it
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* doesn't matter how you define them.
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*/
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#include <errno.h>
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int __softfloat_float_exception_flags;
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int __softfloat_float_exception_mask;
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int __softfloat_float_rounding_mode;
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__fenv_static inline int
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feclearexcept(int excepts)
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{
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__softfloat_float_exception_flags &= ~excepts;
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return (0);
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}
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__fenv_static inline int
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fegetexceptflag(fexcept_t *flagp, int excepts)
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{
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*flagp = __softfloat_float_exception_flags & excepts;
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return (0);
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}
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__fenv_static inline int
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fesetexceptflag(const fexcept_t *flagp, int excepts)
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{
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__softfloat_float_exception_flags &= ~excepts;
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__softfloat_float_exception_flags |= *flagp & excepts;
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return (0);
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}
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__fenv_static inline int
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feraiseexcept(int excepts)
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{
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return (excepts ? -ENOTSUP : 0);
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}
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__fenv_static inline int
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fetestexcept(int excepts)
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{
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return (__softfloat_float_exception_flags & excepts);
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}
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__fenv_static inline int
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fegetround(void)
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{
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return (__softfloat_float_rounding_mode);
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}
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__fenv_static inline int
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fesetround(int round)
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{
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__softfloat_float_rounding_mode = round;
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return (0);
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}
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__fenv_static inline int
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fegetenv(fenv_t *envp)
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{
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__set_env(*envp, __softfloat_float_exception_flags,
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__softfloat_float_exception_mask, __softfloat_float_rounding_mode);
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return (0);
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}
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__fenv_static inline int
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feholdexcept(fenv_t *envp)
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{
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fenv_t __env;
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fegetenv(envp);
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__softfloat_float_exception_flags = 0;
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__softfloat_float_exception_mask = 0;
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return (0);
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}
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__fenv_static inline int
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fesetenv(const fenv_t *envp)
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{
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__softfloat_float_exception_flags = __env_flags(*envp);
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__softfloat_float_exception_mask = __env_mask(*envp);
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__softfloat_float_rounding_mode = __env_round(*envp);
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return (0);
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}
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__fenv_static inline int
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feupdateenv(const fenv_t *envp)
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{
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int __oflags = __softfloat_float_exception_flags;
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fesetenv(envp);
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feraiseexcept(__oflags);
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return (0);
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}
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#if __BSD_VISIBLE
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/* We currently provide no external definitions of the functions below. */
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__fenv_static inline int
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feenableexcept(int __mask)
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{
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int __omask = __softfloat_float_exception_mask;
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__softfloat_float_exception_mask |= __mask;
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return (__omask);
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}
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__fenv_static inline int
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fedisableexcept(int __mask)
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{
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int __omask = __softfloat_float_exception_mask;
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__softfloat_float_exception_mask &= ~__mask;
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return (__omask);
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}
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__fenv_static inline int
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fegetexcept(void)
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{
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return (__softfloat_float_exception_mask);
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}
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#endif /* __BSD_VISIBLE */
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@@ -1,187 +0,0 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2004-2005 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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#define vmrs_fpscr(__r) __asm __volatile("vmrs %0, fpscr" : "=&r"(__r))
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#define vmsr_fpscr(__r) __asm __volatile("vmsr fpscr, %0" : : "r"(__r))
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#define _FPU_MASK_SHIFT 8
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__fenv_static inline int feclearexcept(int excepts)
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{
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fexcept_t __fpsr;
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vmrs_fpscr(__fpsr);
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__fpsr &= ~excepts;
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vmsr_fpscr(__fpsr);
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return (0);
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}
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__fenv_static inline int
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fegetexceptflag(fexcept_t *flagp, int excepts)
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{
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fexcept_t __fpsr;
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vmrs_fpscr(__fpsr);
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*flagp = __fpsr & excepts;
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return (0);
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}
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__fenv_static inline int
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fesetexceptflag(const fexcept_t *flagp, int excepts)
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{
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fexcept_t __fpsr;
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vmrs_fpscr(__fpsr);
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__fpsr &= ~excepts;
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__fpsr |= *flagp & excepts;
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vmsr_fpscr(__fpsr);
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return (0);
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}
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__fenv_static inline int
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feraiseexcept(int excepts)
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{
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fexcept_t __ex = excepts;
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fesetexceptflag(&__ex, excepts); /* XXX */
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return (0);
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}
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__fenv_static inline int
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fetestexcept(int excepts)
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{
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fexcept_t __fpsr;
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vmrs_fpscr(__fpsr);
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return (__fpsr & excepts);
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}
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__fenv_static inline int
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fegetround(void)
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{
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fenv_t __fpsr;
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vmrs_fpscr(__fpsr);
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return (__fpsr & _ROUND_MASK);
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}
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__fenv_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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vmrs_fpscr(__fpsr);
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__fpsr &= ~(_ROUND_MASK);
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__fpsr |= round;
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vmsr_fpscr(__fpsr);
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return (0);
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}
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__fenv_static inline int
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fegetenv(fenv_t *envp)
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{
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vmrs_fpscr(*envp);
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return (0);
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}
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__fenv_static inline int
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feholdexcept(fenv_t *envp)
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{
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fenv_t __env;
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vmrs_fpscr(__env);
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*envp = __env;
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__env &= ~(FE_ALL_EXCEPT);
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vmsr_fpscr(__env);
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return (0);
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}
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__fenv_static inline int
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fesetenv(const fenv_t *envp)
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{
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vmsr_fpscr(*envp);
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return (0);
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}
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__fenv_static inline int
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feupdateenv(const fenv_t *envp)
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{
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fexcept_t __fpsr;
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vmrs_fpscr(__fpsr);
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vmsr_fpscr(*envp);
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feraiseexcept(__fpsr & FE_ALL_EXCEPT);
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return (0);
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}
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#if __BSD_VISIBLE
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/* We currently provide no external definitions of the functions below. */
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__fenv_static inline int
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feenableexcept(int __mask)
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{
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fenv_t __old_fpsr, __new_fpsr;
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vmrs_fpscr(__old_fpsr);
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__new_fpsr = __old_fpsr |
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((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT);
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vmsr_fpscr(__new_fpsr);
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return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT);
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}
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__fenv_static inline int
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fedisableexcept(int __mask)
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{
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fenv_t __old_fpsr, __new_fpsr;
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vmrs_fpscr(__old_fpsr);
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__new_fpsr = __old_fpsr &
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~((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT);
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vmsr_fpscr(__new_fpsr);
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return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT);
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}
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__fenv_static inline int
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fegetexcept(void)
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{
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fenv_t __fpsr;
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vmrs_fpscr(__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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@@ -38,10 +38,6 @@
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extern "C" {
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#endif
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#ifndef __fenv_static
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#define __fenv_static static
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#endif
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typedef int fenv_t;
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typedef int fexcept_t;
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@@ -51,7 +47,7 @@ typedef int fexcept_t;
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#define FE_OVERFLOW 0x0004
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#define FE_UNDERFLOW 0x0008
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#define FE_INEXACT 0x0010
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#ifdef __ARM_PCS_VFP
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#ifndef __SOFTFP__
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#define FE_DENORMAL 0x0080
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW | FE_DENORMAL)
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@@ -60,61 +56,33 @@ typedef int fexcept_t;
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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#endif
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/* Rounding modes */
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#define VFP_FE_TONEAREST 0x00000000
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#define VFP_FE_UPWARD 0x00400000
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#define VFP_FE_DOWNWARD 0x00800000
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#define VFP_FE_TOWARDZERO 0x00c00000
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#ifdef __ARM_PCS_VFP
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#define FE_TONEAREST VFP_FE_TONEAREST
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#define FE_UPWARD VFP_FE_UPWARD
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#define FE_DOWNWARD VFP_FE_DOWNWARD
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#define FE_TOWARDZERO VFP_FE_TOWARDZERO
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#else
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#define FE_TONEAREST 0x0000
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#define FE_TOWARDZERO 0x0001
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#define FE_UPWARD 0x0002
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#define FE_DOWNWARD 0x0003
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#endif
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#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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FE_UPWARD | FE_TOWARDZERO)
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#define FE_TONEAREST 0x00000000
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#define FE_UPWARD 0x00400000
|
||||
#define FE_DOWNWARD 0x00800000
|
||||
#define FE_TOWARDZERO 0x00c00000
|
||||
|
||||
/* Default floating-point environment */
|
||||
|
||||
extern const fenv_t *_fe_dfl_env;
|
||||
#define FE_DFL_ENV (_fe_dfl_env)
|
||||
|
||||
/* We need to be able to map status flag positions to mask flag positions */
|
||||
#ifndef __ARM_PCS_VFP
|
||||
#define _FPUSW_SHIFT 16
|
||||
#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT)
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
int feclearexcept(int excepts);
|
||||
int fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
int fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
int feraiseexcept(int excepts);
|
||||
int fetestexcept(int excepts);
|
||||
int feclearexcept(int);
|
||||
int fegetexceptflag(fexcept_t *, int);
|
||||
int fesetexceptflag(const fexcept_t *, int);
|
||||
int feraiseexcept(int);
|
||||
int fetestexcept(int);
|
||||
int fegetround(void);
|
||||
int fesetround(int round);
|
||||
int fegetenv(fenv_t *envp);
|
||||
int feholdexcept(fenv_t *envp);
|
||||
int fesetenv(const fenv_t *envp);
|
||||
int feupdateenv(const fenv_t *envp);
|
||||
int fesetround(int);
|
||||
int fegetenv(fenv_t *);
|
||||
int feholdexcept(fenv_t *);
|
||||
int fesetenv(const fenv_t *);
|
||||
int feupdateenv(const fenv_t *);
|
||||
#if __BSD_VISIBLE
|
||||
int feenableexcept(int __mask);
|
||||
int fedisableexcept(int __mask);
|
||||
int feenableexcept(int);
|
||||
int fedisableexcept(int);
|
||||
int fegetexcept(void);
|
||||
#endif /* __BSD_VISIBLE */
|
||||
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
@@ -32,9 +32,7 @@ LIB_SOURCES = \
|
||||
fesetexceptflag.c \
|
||||
fesetround.c \
|
||||
fetestexcept.c \
|
||||
feupdateenv.c \
|
||||
fenv-vfp.c \
|
||||
fenv-softfp.c
|
||||
feupdateenv.c
|
||||
|
||||
|
||||
noinst_LIBRARIES = lib.a
|
||||
|
||||
@@ -83,8 +83,7 @@ am__objects_1 = lib_a-e_sqrt.$(OBJEXT) lib_a-ef_sqrt.$(OBJEXT) \
|
||||
lib_a-fenv.$(OBJEXT) lib_a-feraiseexcept.$(OBJEXT) \
|
||||
lib_a-fesetenv.$(OBJEXT) lib_a-fesetexceptflag.$(OBJEXT) \
|
||||
lib_a-fesetround.$(OBJEXT) lib_a-fetestexcept.$(OBJEXT) \
|
||||
lib_a-feupdateenv.$(OBJEXT) lib_a-fenv-vfp.$(OBJEXT) \
|
||||
lib_a-fenv-softfp.$(OBJEXT)
|
||||
lib_a-feupdateenv.$(OBJEXT)
|
||||
am_lib_a_OBJECTS = $(am__objects_1)
|
||||
lib_a_OBJECTS = $(am_lib_a_OBJECTS)
|
||||
DEFAULT_INCLUDES = -I.@am__isrc@
|
||||
@@ -237,9 +236,7 @@ LIB_SOURCES = \
|
||||
fesetexceptflag.c \
|
||||
fesetround.c \
|
||||
fetestexcept.c \
|
||||
feupdateenv.c \
|
||||
fenv-vfp.c \
|
||||
fenv-softfp.c
|
||||
feupdateenv.c
|
||||
|
||||
noinst_LIBRARIES = lib.a
|
||||
lib_a_SOURCES = $(LIB_SOURCES)
|
||||
@@ -479,18 +476,6 @@ lib_a-feupdateenv.o: feupdateenv.c
|
||||
lib_a-feupdateenv.obj: feupdateenv.c
|
||||
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-feupdateenv.obj `if test -f 'feupdateenv.c'; then $(CYGPATH_W) 'feupdateenv.c'; else $(CYGPATH_W) '$(srcdir)/feupdateenv.c'; fi`
|
||||
|
||||
lib_a-fenv-vfp.o: fenv-vfp.c
|
||||
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fenv-vfp.o `test -f 'fenv-vfp.c' || echo '$(srcdir)/'`fenv-vfp.c
|
||||
|
||||
lib_a-fenv-vfp.obj: fenv-vfp.c
|
||||
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fenv-vfp.obj `if test -f 'fenv-vfp.c'; then $(CYGPATH_W) 'fenv-vfp.c'; else $(CYGPATH_W) '$(srcdir)/fenv-vfp.c'; fi`
|
||||
|
||||
lib_a-fenv-softfp.o: fenv-softfp.c
|
||||
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fenv-softfp.o `test -f 'fenv-softfp.c' || echo '$(srcdir)/'`fenv-softfp.c
|
||||
|
||||
lib_a-fenv-softfp.obj: fenv-softfp.c
|
||||
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fenv-softfp.obj `if test -f 'fenv-softfp.c'; then $(CYGPATH_W) 'fenv-softfp.c'; else $(CYGPATH_W) '$(srcdir)/fenv-softfp.c'; fi`
|
||||
|
||||
ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
|
||||
list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
|
||||
unique=`for i in $$list; do \
|
||||
|
||||
@@ -1,32 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 2013 Andrew Turner <andrew@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.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#define FENV_MANGLE(x) __softfp_ ##x
|
||||
#include <machine/fenv-mangle.h>
|
||||
#include "fenv.c"
|
||||
|
||||
@@ -1,32 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 2013 Andrew Turner <andrew@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.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#define FENV_MANGLE(x) __vfp_ ##x
|
||||
#include <machine/fenv-mangle.h>
|
||||
#include "fenv.c"
|
||||
|
||||
@@ -1,7 +1,7 @@
|
||||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
||||
*
|
||||
* Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
|
||||
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
||||
* Copyright (c) 2013 Andrew Turner <andrew@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
@@ -29,300 +29,195 @@
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#define __fenv_static
|
||||
#include <fenv.h>
|
||||
|
||||
#include <machine/acle-compat.h>
|
||||
|
||||
#if __ARM_ARCH >= 6
|
||||
#define FENV_ARMv6
|
||||
#ifndef __SOFTFP__
|
||||
#define vmrs_fpscr(__r) __asm __volatile("vmrs %0, fpscr" : "=&r"(__r))
|
||||
#define vmsr_fpscr(__r) __asm __volatile("vmsr fpscr, %0" : : "r"(__r))
|
||||
#define _FPU_MASK_SHIFT 8
|
||||
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
|
||||
FE_UPWARD | FE_TOWARDZERO)
|
||||
#endif
|
||||
|
||||
/* When SOFTFP_ABI is defined we are using the softfp ABI. */
|
||||
#if defined(__VFP_FP__) && !defined(__ARM_PCS_VFP)
|
||||
#define SOFTFP_ABI
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef FENV_MANGLE
|
||||
/*
|
||||
* Hopefully the system ID byte is immutable, so it's valid to use
|
||||
* this as a default environment.
|
||||
*/
|
||||
fenv_t __fe_dfl_env = { 0 };
|
||||
|
||||
const fenv_t *_fe_dfl_env = &__fe_dfl_env;
|
||||
#endif
|
||||
|
||||
|
||||
/* If this is a non-mangled softfp version special processing is required */
|
||||
#if defined(FENV_MANGLE) || !defined(SOFTFP_ABI) || !defined(FENV_ARMv6)
|
||||
|
||||
/*
|
||||
* The following macros map between the softfloat emulator's flags and
|
||||
* the hardware's FPSR. The hardware this file was written for doesn't
|
||||
* have rounding control bits, so we stick those in the system ID byte.
|
||||
*/
|
||||
#ifndef __ARM_PCS_VFP
|
||||
#define __set_env(env, flags, mask, rnd) env = ((flags) \
|
||||
| (mask)<<_FPUSW_SHIFT \
|
||||
| (rnd) << 24)
|
||||
#define __env_flags(env) ((env) & FE_ALL_EXCEPT)
|
||||
#define __env_mask(env) (((env) >> _FPUSW_SHIFT) \
|
||||
& FE_ALL_EXCEPT)
|
||||
#define __env_round(env) (((env) >> 24) & _ROUND_MASK)
|
||||
|
||||
#include <machine/fenv-softfloat.h>
|
||||
|
||||
#else /* __ARM_PCS_VFP PRESENT */
|
||||
|
||||
#include <machine/fenv-vfp.h>
|
||||
|
||||
#endif /* __ARM_PCS_VFP */
|
||||
|
||||
#ifdef __GNUC_GNU_INLINE__
|
||||
#error "This file must be compiled with C99 'inline' semantics"
|
||||
#endif
|
||||
|
||||
extern inline int feclearexcept(int excepts);
|
||||
extern inline int fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
extern inline int fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
extern inline int feraiseexcept(int excepts);
|
||||
extern inline int fetestexcept(int excepts);
|
||||
extern inline int fegetround(void);
|
||||
extern inline int fesetround(int round);
|
||||
extern inline int fegetenv(fenv_t *envp);
|
||||
extern inline int feholdexcept(fenv_t *envp);
|
||||
extern inline int fesetenv(const fenv_t *envp);
|
||||
extern inline int feupdateenv(const fenv_t *envp);
|
||||
extern inline int feenableexcept(int __mask);
|
||||
extern inline int fedisableexcept(int __mask);
|
||||
extern inline int fegetexcept(void);
|
||||
|
||||
#else /* !FENV_MANGLE && SOFTFP_ABI */
|
||||
/* Set by libc when the VFP unit is enabled */
|
||||
|
||||
int _libc_arm_fpu_present;
|
||||
|
||||
int __softfp_feclearexcept(int excepts);
|
||||
int __softfp_fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
int __softfp_fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
int __softfp_feraiseexcept(int excepts);
|
||||
int __softfp_fetestexcept(int excepts);
|
||||
int __softfp_fegetround(void);
|
||||
int __softfp_fesetround(int round);
|
||||
int __softfp_fegetenv(fenv_t *envp);
|
||||
int __softfp_feholdexcept(fenv_t *envp);
|
||||
int __softfp_fesetenv(const fenv_t *envp);
|
||||
int __softfp_feupdateenv(const fenv_t *envp);
|
||||
int __softfp_feenableexcept(int __mask);
|
||||
int __softfp_fedisableexcept(int __mask);
|
||||
int __softfp_fegetexcept(void);
|
||||
|
||||
int __vfp_feclearexcept(int excepts);
|
||||
int __vfp_fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
int __vfp_fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
int __vfp_feraiseexcept(int excepts);
|
||||
int __vfp_fetestexcept(int excepts);
|
||||
int __vfp_fegetround(void);
|
||||
int __vfp_fesetround(int round);
|
||||
int __vfp_fegetenv(fenv_t *envp);
|
||||
int __vfp_feholdexcept(fenv_t *envp);
|
||||
int __vfp_fesetenv(const fenv_t *envp);
|
||||
int __vfp_feupdateenv(const fenv_t *envp);
|
||||
int __vfp_feenableexcept(int __mask);
|
||||
int __vfp_fedisableexcept(int __mask);
|
||||
int __vfp_fegetexcept(void);
|
||||
|
||||
static int
|
||||
__softfp_round_to_vfp(int round)
|
||||
{
|
||||
|
||||
switch (round) {
|
||||
case FE_TONEAREST:
|
||||
default:
|
||||
return VFP_FE_TONEAREST;
|
||||
case FE_TOWARDZERO:
|
||||
return VFP_FE_TOWARDZERO;
|
||||
case FE_UPWARD:
|
||||
return VFP_FE_UPWARD;
|
||||
case FE_DOWNWARD:
|
||||
return VFP_FE_DOWNWARD;
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
__softfp_round_from_vfp(int round)
|
||||
{
|
||||
|
||||
switch (round) {
|
||||
case VFP_FE_TONEAREST:
|
||||
default:
|
||||
return FE_TONEAREST;
|
||||
case VFP_FE_TOWARDZERO:
|
||||
return FE_TOWARDZERO;
|
||||
case VFP_FE_UPWARD:
|
||||
return FE_UPWARD;
|
||||
case VFP_FE_DOWNWARD:
|
||||
return FE_DOWNWARD;
|
||||
}
|
||||
}
|
||||
|
||||
int feclearexcept(int excepts)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __fpsr;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_feclearexcept(excepts);
|
||||
__softfp_feclearexcept(excepts);
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
__fpsr &= ~excepts;
|
||||
vmsr_fpscr(__fpsr);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int fegetexceptflag(fexcept_t *flagp, int excepts)
|
||||
{
|
||||
fexcept_t __vfp_flagp;
|
||||
|
||||
__vfp_flagp = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_fegetexceptflag(&__vfp_flagp, excepts);
|
||||
__softfp_fegetexceptflag(flagp, excepts);
|
||||
|
||||
*flagp |= __vfp_flagp;
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __fpsr;
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
__fpsr &= ~excepts;
|
||||
__fpsr |= *flagp & excepts;
|
||||
vmsr_fpscr(__fpsr);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int fesetexceptflag(const fexcept_t *flagp, int excepts)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __fpsr;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_fesetexceptflag(flagp, excepts);
|
||||
__softfp_fesetexceptflag(flagp, excepts);
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
__fpsr &= ~excepts;
|
||||
__fpsr |= *flagp & excepts;
|
||||
vmsr_fpscr(__fpsr);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int feraiseexcept(int excepts)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __ex = excepts;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_feraiseexcept(excepts);
|
||||
__softfp_feraiseexcept(excepts);
|
||||
|
||||
fesetexceptflag(&__ex, excepts);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int fetestexcept(int excepts)
|
||||
{
|
||||
int __got_excepts;
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __fpsr;
|
||||
|
||||
__got_excepts = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__got_excepts = __vfp_fetestexcept(excepts);
|
||||
__got_excepts |= __softfp_fetestexcept(excepts);
|
||||
|
||||
return (__got_excepts);
|
||||
vmrs_fpscr(__fpsr);
|
||||
return (__fpsr & excepts);
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
}
|
||||
|
||||
int fegetround(void)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __fpsr;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
return __softfp_round_from_vfp(__vfp_fegetround());
|
||||
return __softfp_fegetround();
|
||||
vmrs_fpscr(__fpsr);
|
||||
return (__fpsr & _ROUND_MASK);
|
||||
#else
|
||||
#ifdef FE_TONEAREST
|
||||
return (FE_TONEAREST);
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
int fesetround(int round)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __fpsr;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_fesetround(__softfp_round_to_vfp(round));
|
||||
__softfp_fesetround(round);
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
__fpsr &= ~(_ROUND_MASK);
|
||||
__fpsr |= round;
|
||||
vmsr_fpscr(__fpsr);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int fegetenv(fenv_t *envp)
|
||||
{
|
||||
fenv_t __vfp_envp;
|
||||
|
||||
__vfp_envp = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_fegetenv(&__vfp_envp);
|
||||
__softfp_fegetenv(envp);
|
||||
*envp |= __vfp_envp;
|
||||
|
||||
#ifndef __SOFTFP__
|
||||
vmrs_fpscr(*envp);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int feholdexcept(fenv_t *envp)
|
||||
{
|
||||
fenv_t __vfp_envp;
|
||||
|
||||
__vfp_envp = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_feholdexcept(&__vfp_envp);
|
||||
__softfp_feholdexcept(envp);
|
||||
*envp |= __vfp_envp;
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __env;
|
||||
|
||||
vmrs_fpscr(__env);
|
||||
*envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT);
|
||||
vmsr_fpscr(__env);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int fesetenv(const fenv_t *envp)
|
||||
{
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_fesetenv(envp);
|
||||
__softfp_fesetenv(envp);
|
||||
|
||||
#ifndef __SOFTFP__
|
||||
vmsr_fpscr(*envp);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int feupdateenv(const fenv_t *envp)
|
||||
{
|
||||
#ifndef __SOFTFP__
|
||||
fexcept_t __fpsr;
|
||||
|
||||
if (_libc_arm_fpu_present)
|
||||
__vfp_feupdateenv(envp);
|
||||
__softfp_feupdateenv(envp);
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
vmsr_fpscr(*envp);
|
||||
feraiseexcept(__fpsr & FE_ALL_EXCEPT);
|
||||
#else
|
||||
#if defined(FE_NOMASK_ENV) && FE_ALL_EXCEPT != 0
|
||||
if (envp == FE_NOMASK_ENV)
|
||||
return (1);
|
||||
#endif
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
int feenableexcept(int __mask)
|
||||
{
|
||||
int __unmasked;
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __old_fpsr, __new_fpsr;
|
||||
|
||||
__unmasked = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__unmasked = __vfp_feenableexcept(__mask);
|
||||
__unmasked |= __softfp_feenableexcept(__mask);
|
||||
|
||||
return (__unmasked);
|
||||
vmrs_fpscr(__old_fpsr);
|
||||
__new_fpsr = __old_fpsr |
|
||||
((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT);
|
||||
vmsr_fpscr(__new_fpsr);
|
||||
return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT);
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
}
|
||||
|
||||
int fedisableexcept(int __mask)
|
||||
{
|
||||
int __unmasked;
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __old_fpsr, __new_fpsr;
|
||||
|
||||
__unmasked = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__unmasked = __vfp_fedisableexcept(__mask);
|
||||
__unmasked |= __softfp_fedisableexcept(__mask);
|
||||
|
||||
return (__unmasked);
|
||||
vmrs_fpscr(__old_fpsr);
|
||||
__new_fpsr = __old_fpsr &
|
||||
~((__mask & FE_ALL_EXCEPT) << _FPU_MASK_SHIFT);
|
||||
vmsr_fpscr(__new_fpsr);
|
||||
return ((__old_fpsr >> _FPU_MASK_SHIFT) & FE_ALL_EXCEPT);
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
}
|
||||
|
||||
int fegetexcept(void)
|
||||
{
|
||||
int __unmasked;
|
||||
|
||||
__unmasked = 0;
|
||||
if (_libc_arm_fpu_present)
|
||||
__unmasked = __vfp_fegetexcept();
|
||||
__unmasked |= __softfp_fegetexcept();
|
||||
|
||||
return (__unmasked);
|
||||
}
|
||||
#ifndef __SOFTFP__
|
||||
fenv_t __fpsr;
|
||||
|
||||
vmrs_fpscr(__fpsr);
|
||||
return (__fpsr & FE_ALL_EXCEPT);
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user