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SPARC fenv support 

Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>
This commit is contained in:
Eshan dhawan via Newlib 2020-07-03 02:43:05 +05:30 committed by Corinna Vinschen
parent fd5e27d362
commit 03bf9f431c
17 changed files with 546 additions and 0 deletions
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1
newlib/configure.host
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@ -322,6 +322,7 @@ case "${host_cpu}" in
machine_dir=sh
;;
sparc*)
libm_machine_dir=sparc
machine_dir=sparc
# FIXME: Might wish to make MALLOC_ALIGNMENT more generic.
newlib_cflags="${newlib_cflags} -DMALLOC_ALIGNMENT=8"

85
newlib/libc/machine/sparc/sys/fenv.h Normal file
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@ -0,0 +1,85 @@
/* $NetBSD: fenv.h,v 1.2 2017/01/14 12:00:13 martin Exp $ */
/*-
* 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.
*
* $FreeBSD$
*/
#ifndef _SYS_FENV_H_
#define _SYS_FENV_H_
#include <stdint.h>
#ifdef __arch64__
typedef uint64_t fenv_t;
typedef uint64_t fexcept_t;
#else
typedef uint32_t fenv_t;
typedef uint32_t fexcept_t;
#endif
/*
* Exception flags
*
* Symbols are defined in such a way, to correspond to the accrued
* exception bits (aexc) fields of FSR.
*/
#define FE_INEXACT 0x00000020 /* 0000100000 */
#define FE_DIVBYZERO 0x00000040 /* 0001000000 */
#define FE_UNDERFLOW 0x00000080 /* 0010000000 */
#define FE_OVERFLOW 0x00000100 /* 0100000000 */
#define FE_INVALID 0x00000200 /* 1000000000 */
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
/*
* Rounding modes
*
* We can't just use the hardware bit values here, because that would
* make FE_UPWARD and FE_DOWNWARD negative, which is not allowed.
*/
#define FE_TONEAREST 0 /* round to nearest representable number */
#define FE_TOWARDZERO 1 /* round to zero (truncate) */
#define FE_UPWARD 2 /* round toward positive infinity */
#define FE_DOWNWARD 3 /* round toward negative infinity */
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
FE_UPWARD | FE_TOWARDZERO)
#define _ROUND_SHIFT 30
/* 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 */
#define _FPUSW_SHIFT 18
#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT)
#endif /* !_SYS_FENV_H_ */

1
newlib/libm/machine/configure.in
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@ -34,6 +34,7 @@ if test -n "${libm_machine_dir}"; then
riscv) AC_CONFIG_SUBDIRS(riscv) ;;
x86_64) AC_CONFIG_SUBDIRS(x86_64) ;;
powerpc) AC_CONFIG_SUBDIRS(powerpc) ;;
sparc) AC_CONFIG_SUBDIRS(sparc) ;;
esac;
if test "${use_libtool}" = "yes"; then
machlib=${libm_machine_dir}/lib${libm_machine_dir}.${aext}

21
newlib/libm/machine/sparc/Makefile.am Normal file
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@ -0,0 +1,21 @@
## Process this file with automake to generate Makefile.in
INCLUDES = -I $(newlib_basedir)/../newlib/libm/common $(NEWLIB_CFLAGS) \
$(CROSS_CFLAGS) $(TARGET_CFLAGS)
LIB_SOURCES = \
feclearexcept.c fegetenv.c fegetexceptflag.c \
fegetround.c feholdexcept.c feraiseexcept.c fesetenv.c \
fesetexceptflag.c fesetround.c fetestexcept.c feupdateenv.c \
fenv.c
noinst_LIBRARIES = lib.a
lib_a_SOURCES = $(LIB_SOURCES)
lib_a_CFLAGS = $(AM_CFLAGS)
lib_a_CCASFLAGS = $(AM_CCASFLAGS)
noinst_DATA =
include $(srcdir)/../../../Makefile.shared
ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host

11
newlib/libm/machine/sparc/configure.in Normal file
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@ -0,0 +1,11 @@
AC_PREREQ(2.59)
AC_INIT([newlib],[NEWLIB_VERSION])
AC_CONFIG_SRCDIR([Makefile.am])
AC_CONFIG_AUX_DIR(../../../..)
NEWLIB_CONFIGURE(../../..)
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

7
newlib/libm/machine/sparc/feclearexcept.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fegetenv.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fegetexceptflag.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fegetround.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/feholdexcept.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

350
newlib/libm/machine/sparc/fenv.c Normal file
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@ -0,0 +1,350 @@
/* $NetBSD: fenv.c,v 1.2 2017/03/22 23:11:09 chs Exp $ */
/*-
* 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
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: fenv.c,v 1.2 2017/03/22 23:11:09 chs Exp $");
#include <assert.h>
#include <fenv.h>
#define _DIAGASSERT(x) assert(x)
#ifdef __weak_alias
__weak_alias(feclearexcept,_feclearexcept)
__weak_alias(fedisableexcept,_fedisableexcept)
__weak_alias(feenableexcept,_feenableexcept)
__weak_alias(fegetenv,_fegetenv)
__weak_alias(fegetexcept,_fegetexcept)
__weak_alias(fegetexceptflag,_fegetexceptflag)
__weak_alias(fegetround,_fegetround)
__weak_alias(feholdexcept,_feholdexcept)
__weak_alias(feraiseexcept,_feraiseexcept)
__weak_alias(fesetenv,_fesetenv)
__weak_alias(fesetexceptflag,_fesetexceptflag)
__weak_alias(fesetround,_fesetround)
__weak_alias(fetestexcept,_fetestexcept)
__weak_alias(feupdateenv,_feupdateenv)
#endif
/* Load floating-point state register (32bits) */
#define __ldfsr(__r) __asm__ __volatile__ \
("ld %0, %%fsr" : : "m" (__r))
/* Save floating-point state register (32bits) */
#define __stfsr(__r) __asm__ __volatile__ \
("st %%fsr, %0" : "=m" (*(__r)))
/*
* The feclearexcept() function clears the supported floating-point exceptions
* represented by `excepts'.
*/
int
feclearexcept(int excepts)
{
fexcept_t r;
int ex;
_DIAGASSERT((excepts & ~FE_ALL_EXCEPT) == 0);
ex = excepts & FE_ALL_EXCEPT;
__stfsr(&r);
r &= ~ex;
__ldfsr(r);
/* Success */
return 0;
}
/*
* The fegetexceptflag() function stores an implementation-defined
* representation of the states of the floating-point status flags indicated
* by the argument excepts in the object pointed to by the argument flagp.
*/
int
fegetexceptflag(fexcept_t *flagp, int excepts)
{
fexcept_t r;
int ex;
_DIAGASSERT(flagp != NULL);
_DIAGASSERT((excepts & ~FE_ALL_EXCEPT) == 0);
ex = excepts & FE_ALL_EXCEPT;
__stfsr(&r);
*flagp = r & ex;
/* Success */
return 0;
}
/*
* This function sets the floating-point status flags indicated by the argument
* `excepts' to the states stored in the object pointed to by `flagp'. It does
* NOT raise any floating-point exceptions, but only sets the state of the flags.
*/
int
fesetexceptflag(const fexcept_t *flagp, int excepts)
{
fexcept_t r;
int ex;
_DIAGASSERT(flagp != NULL);
_DIAGASSERT((excepts & ~FE_ALL_EXCEPT) == 0);
ex = excepts & FE_ALL_EXCEPT;
__stfsr(&r);
r &= ~ex;
r |= *flagp & ex;
__ldfsr(r);
/* Success */
return 0;
}
/*
* The feraiseexcept() function raises the supported floating-point exceptions
* represented by the argument `excepts'.
*
* The order in which these floating-point exceptions are raised is unspecified
* (by the standard).
*/
int
feraiseexcept(int excepts)
{
volatile double d;
int ex;
_DIAGASSERT((excepts & ~FE_ALL_EXCEPT) == 0);
ex = excepts & FE_ALL_EXCEPT;
/*
* With a compiler that supports the FENV_ACCESS pragma properly, simple
* expressions like '0.0 / 0.0' should be sufficient to generate traps.
* Unfortunately, we need to bring a volatile variable into the equation
* to prevent incorrect optimizations.
*/
if (ex & FE_INVALID) {
d = 0.0;
d = 0.0 / d;
}
if (ex & FE_DIVBYZERO) {
d = 0.0;
d = 1.0 / d;
}
if (ex & FE_OVERFLOW) {
d = 0x1.ffp1023;
d *= 2.0;
}
if (ex & FE_UNDERFLOW) {
d = 0x1p-1022;
d /= 0x1p1023;
}
if (ex & FE_INEXACT) {
d = 0x1p-1022;
d += 1.0;
}
/* Success */
return 0;
}
/*
* The fetestexcept() function determines which of a specified subset of the
* floating-point exception flags are currently set. The `excepts' argument
* specifies the floating-point status flags to be queried.
*/
int
fetestexcept(int excepts)
{
fexcept_t r;
_DIAGASSERT((excepts & ~FE_ALL_EXCEPT) == 0);
__stfsr(&r);
return r & (excepts & FE_ALL_EXCEPT);
}
/*
* The fegetround() function gets the current rounding direction.
*/
int
fegetround(void)
{
fenv_t r;
__stfsr(&r);
return (r >> _ROUND_SHIFT) & _ROUND_MASK;
}
/*
* The fesetround() function establishes the rounding direction represented by
* its argument `round'. If the argument is not equal to the value of a rounding
* direction macro, the rounding direction is not changed.
*/
int
fesetround(int round)
{
fenv_t r;
_DIAGASSERT((round & ~_ROUND_MASK) == 0);
if (round & ~_ROUND_MASK)
return -1;
__stfsr(&r);
r &= ~(_ROUND_MASK << _ROUND_SHIFT);
r |= round << _ROUND_SHIFT;
__ldfsr(r);
/* Success */
return 0;
}
/*
* The fegetenv() function attempts to store the current floating-point
* environment in the object pointed to by envp.
*/
int
fegetenv(fenv_t *envp)
{
_DIAGASSERT(envp != NULL);
__stfsr(envp);
/* Success */
return 0;
}
/*
* The feholdexcept() function saves the current floating-point environment
* in the object pointed to by envp, clears the floating-point status flags, and
* then installs a non-stop (continue on floating-point exceptions) mode, if
* available, for all floating-point exceptions.
*/
int
feholdexcept(fenv_t *envp)
{
fenv_t r;
_DIAGASSERT(envp != NULL);
__stfsr(&r);
*envp = r;
r &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
__ldfsr(r);
/* Success */
return 0;
}
/*
* The fesetenv() function attempts to establish the floating-point environment
* represented by the object pointed to by envp. The argument `envp' points
* to an object set by a call to fegetenv() or feholdexcept(), or equal a
* floating-point environment macro. The fesetenv() function does not raise
* floating-point exceptions, but only installs the state of the floating-point
* status flags represented through its argument.
*/
int
fesetenv(const fenv_t *envp)
{
_DIAGASSERT(envp != NULL);
__ldfsr(*envp);
/* Success */
return 0;
}
/*
* The feupdateenv() function saves the currently raised floating-point
* exceptions in its automatic storage, installs the floating-point environment
* represented by the object pointed to by `envp', and then raises the saved
* floating-point exceptions. The argument `envp' shall point to an object set
* by a call to feholdexcept() or fegetenv(), or equal a floating-point
* environment macro.
*/
int
feupdateenv(const fenv_t *envp)
{
fexcept_t r;
_DIAGASSERT(envp != NULL);
__stfsr(&r);
__ldfsr(*envp);
_DIAGASSERT((r & ~FE_ALL_EXCEPT) == 0);
feraiseexcept(r & FE_ALL_EXCEPT);
/* Success */
return 0;
}
/*
* The following functions are extentions to the standard
*/
int
feenableexcept(int mask)
{
fenv_t old_r, new_r;
__stfsr(&old_r);
new_r = old_r | ((mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT);
__ldfsr(new_r);
return (old_r >> _FPUSW_SHIFT) & FE_ALL_EXCEPT;
}
int
fedisableexcept(int mask)
{
fenv_t old_r, new_r;
__stfsr(&old_r);
new_r = old_r & ~((mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT);
__ldfsr(new_r);
return (old_r >> _FPUSW_SHIFT) & FE_ALL_EXCEPT;
}
int
fegetexcept(void)
{
fenv_t r;
__stfsr(&r);
return (r & _ENABLE_MASK) >> _FPUSW_SHIFT;
}

7
newlib/libm/machine/sparc/feraiseexcept.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fesetenv.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fesetexceptflag.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fesetround.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/fetestexcept.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"

7
newlib/libm/machine/sparc/feupdateenv.c Normal file
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@ -0,0 +1,7 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* (c) Copyright 2019 Joel Sherrill <joel@rtems.org>
*/
#include "../../fenv/fenv_stub.c"