[PATCH] removed SOFTFP fenv support from ARM
Eshan dhawan
eshandhawan51 at gmail.com
Thu Jul 16 23:23:09 UTC 2020
This patch changes the current ARM fenv support
similar to that in X86_64
Signed-off-by: Eshan dhawan <eshandhawan51 at gmail.com>
---
newlib/libc/machine/arm/machine/fenv-mangle.h | 53 ----
.../libc/machine/arm/machine/fenv-softfloat.h | 187 ------------
newlib/libc/machine/arm/machine/fenv-vfp.h | 187 ------------
newlib/libc/machine/arm/sys/fenv.h | 19 +-
newlib/libm/machine/arm/Makefile.am | 4 +-
newlib/libm/machine/arm/fenv-softfp.c | 32 ---
newlib/libm/machine/arm/fenv-vfp.c | 37 ---
newlib/libm/machine/arm/fenv.c | 268 +++++++-----------
8 files changed, 100 insertions(+), 687 deletions(-)
delete mode 100644 newlib/libc/machine/arm/machine/fenv-mangle.h
delete mode 100644 newlib/libc/machine/arm/machine/fenv-softfloat.h
delete mode 100644 newlib/libc/machine/arm/machine/fenv-vfp.h
delete mode 100644 newlib/libm/machine/arm/fenv-softfp.c
delete mode 100644 newlib/libm/machine/arm/fenv-vfp.c
diff --git a/newlib/libc/machine/arm/machine/fenv-mangle.h b/newlib/libc/machine/arm/machine/fenv-mangle.h
deleted file mode 100644
index 476f7b20c..000000000
--- a/newlib/libc/machine/arm/machine/fenv-mangle.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*-
- * Copyright (c) 2013 Andrew Turner <andrew at 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.
- *
- * $FreeBSD$
- */
-
-#ifdef _FENV_MANGLE_H_
-#error Only include fenv-mangle.h once
-#endif
-
-#define _FENV_MANGLE_H_
-
-#ifndef FENV_MANGLE
-#error FENV_MANGLE is undefined
-#endif
-
-#define feclearexcept FENV_MANGLE(feclearexcept)
-#define fegetexceptflag FENV_MANGLE(fegetexceptflag)
-#define fesetexceptflag FENV_MANGLE(fesetexceptflag)
-#define feraiseexcept FENV_MANGLE(feraiseexcept)
-#define fetestexcept FENV_MANGLE(fetestexcept)
-#define fegetround FENV_MANGLE(fegetround)
-#define fesetround FENV_MANGLE(fesetround)
-#define fegetenv FENV_MANGLE(fegetenv)
-#define feholdexcept FENV_MANGLE(feholdexcept)
-#define fesetenv FENV_MANGLE(fesetenv)
-#define feupdateenv FENV_MANGLE(feupdateenv)
-#define feenableexcept FENV_MANGLE(feenableexcept)
-#define fedisableexcept FENV_MANGLE(fedisableexcept)
-#define fegetexcept FENV_MANGLE(fegetexcept)
-
diff --git a/newlib/libc/machine/arm/machine/fenv-softfloat.h b/newlib/libc/machine/arm/machine/fenv-softfloat.h
deleted file mode 100644
index 5d33e18d0..000000000
--- a/newlib/libc/machine/arm/machine/fenv-softfloat.h
+++ /dev/null
@@ -1,187 +0,0 @@
- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2004-2011 David Schultz <das at 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_
-#error "This file is meant to be included only by <sys/fenv.h>."
-#endif
-/* the file can be added from architecture specific fenv.h file found in
- *libc/sys/arch/sys *
- *
- * This file implements the functionality of <fenv.h> on platforms that
- * lack an FPU and use softfloat in libc for floating point. To use it,
- * you must write an <fenv.h> that provides the following:
- *
- * - a typedef for fenv_t, which may be an integer or struct type
- * - a typedef for fexcept_t (XXX This file assumes fexcept_t is a
- * simple integer type containing the exception mask.)
- * - definitions of FE_* constants for the five exceptions and four
- * rounding modes in IEEE 754, as described in fenv(3)
- * - a definition, and the corresponding external symbol, for FE_DFL_ENV
- * - a macro __set_env(env, flags, mask, rnd), which sets the given fenv_t
- * from the exception flags, mask, and rounding mode
- * - macros __env_flags(env), __env_mask(env), and __env_round(env), which
- * extract fields from an fenv_t
- * - a definition of __fenv_static
- *
- * If the architecture supports an optional FPU, it's recommended that you
- * define fenv_t and fexcept_t to match the hardware ABI. Otherwise, it
- * doesn't matter how you define them.
- */
-#include <errno.h>
-
-int __softfloat_float_exception_flags;
-int __softfloat_float_exception_mask;
-int __softfloat_float_rounding_mode;
-
-
-__fenv_static inline int
-feclearexcept(int excepts)
-{
-
- __softfloat_float_exception_flags &= ~excepts;
- return (0);
-}
-
-__fenv_static inline int
-fegetexceptflag(fexcept_t *flagp, int excepts)
-{
-
- *flagp = __softfloat_float_exception_flags & excepts;
- return (0);
-}
-
-__fenv_static inline int
-fesetexceptflag(const fexcept_t *flagp, int excepts)
-{
-
- __softfloat_float_exception_flags &= ~excepts;
- __softfloat_float_exception_flags |= *flagp & excepts;
- return (0);
-}
-
-__fenv_static inline int
-feraiseexcept(int excepts)
-{
-
- return (excepts ? -ENOTSUP : 0);
-}
-
-__fenv_static inline int
-fetestexcept(int excepts)
-{
-
- return (__softfloat_float_exception_flags & excepts);
-}
-
-__fenv_static inline int
-fegetround(void)
-{
-
- return (__softfloat_float_rounding_mode);
-}
-
-__fenv_static inline int
-fesetround(int round)
-{
-
- __softfloat_float_rounding_mode = round;
- return (0);
-}
-
-__fenv_static inline int
-fegetenv(fenv_t *envp)
-{
-
- __set_env(*envp, __softfloat_float_exception_flags,
- __softfloat_float_exception_mask, __softfloat_float_rounding_mode);
- return (0);
-}
-
-__fenv_static inline int
-feholdexcept(fenv_t *envp)
-{
- fenv_t __env;
-
- fegetenv(envp);
- __softfloat_float_exception_flags = 0;
- __softfloat_float_exception_mask = 0;
- return (0);
-}
-
-__fenv_static inline int
-fesetenv(const fenv_t *envp)
-{
-
- __softfloat_float_exception_flags = __env_flags(*envp);
- __softfloat_float_exception_mask = __env_mask(*envp);
- __softfloat_float_rounding_mode = __env_round(*envp);
- return (0);
-}
-
-__fenv_static inline int
-feupdateenv(const fenv_t *envp)
-{
- int __oflags = __softfloat_float_exception_flags;
-
- fesetenv(envp);
- feraiseexcept(__oflags);
- return (0);
-}
-
-#if __BSD_VISIBLE
-
-/* We currently provide no external definitions of the functions below. */
-
-__fenv_static inline int
-feenableexcept(int __mask)
-{
- int __omask = __softfloat_float_exception_mask;
-
- __softfloat_float_exception_mask |= __mask;
- return (__omask);
-}
-
-__fenv_static inline int
-fedisableexcept(int __mask)
-{
- int __omask = __softfloat_float_exception_mask;
-
- __softfloat_float_exception_mask &= ~__mask;
- return (__omask);
-}
-
-__fenv_static inline int
-fegetexcept(void)
-{
-
- return (__softfloat_float_exception_mask);
-}
-
-#endif /* __BSD_VISIBLE */
diff --git a/newlib/libc/machine/arm/machine/fenv-vfp.h b/newlib/libc/machine/arm/machine/fenv-vfp.h
deleted file mode 100644
index 25d71f3ab..000000000
--- a/newlib/libc/machine/arm/machine/fenv-vfp.h
+++ /dev/null
@@ -1,187 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2004-2005 David Schultz <das at 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 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
-
-__fenv_static inline int feclearexcept(int excepts)
-{
- fexcept_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- __fpsr &= ~excepts;
- vmsr_fpscr(__fpsr);
- return (0);
-}
-
-__fenv_static inline int
-fegetexceptflag(fexcept_t *flagp, int excepts)
-{
- fexcept_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- *flagp = __fpsr & excepts;
- return (0);
-}
-
-__fenv_static inline int
-fesetexceptflag(const fexcept_t *flagp, int excepts)
-{
- fexcept_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- __fpsr &= ~excepts;
- __fpsr |= *flagp & excepts;
- vmsr_fpscr(__fpsr);
- return (0);
-}
-
-__fenv_static inline int
-feraiseexcept(int excepts)
-{
- fexcept_t __ex = excepts;
-
- fesetexceptflag(&__ex, excepts); /* XXX */
- return (0);
-}
-
-__fenv_static inline int
-fetestexcept(int excepts)
-{
- fexcept_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- return (__fpsr & excepts);
-}
-
-__fenv_static inline int
-fegetround(void)
-{
- fenv_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- return (__fpsr & _ROUND_MASK);
-}
-
-__fenv_static inline int
-fesetround(int round)
-{
- fenv_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- __fpsr &= ~(_ROUND_MASK);
- __fpsr |= round;
- vmsr_fpscr(__fpsr);
- return (0);
-}
-
-__fenv_static inline int
-fegetenv(fenv_t *envp)
-{
-
- vmrs_fpscr(*envp);
- return (0);
-}
-
-__fenv_static inline int
-feholdexcept(fenv_t *envp)
-{
- fenv_t __env;
-
- vmrs_fpscr(__env);
- *envp = __env;
- __env &= ~(FE_ALL_EXCEPT);
- vmsr_fpscr(__env);
- return (0);
-}
-
-__fenv_static inline int
-fesetenv(const fenv_t *envp)
-{
-
- vmsr_fpscr(*envp);
- return (0);
-}
-
-__fenv_static inline int
-feupdateenv(const fenv_t *envp)
-{
- fexcept_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- vmsr_fpscr(*envp);
- feraiseexcept(__fpsr & FE_ALL_EXCEPT);
- return (0);
-}
-
-#if __BSD_VISIBLE
-
-/* We currently provide no external definitions of the functions below. */
-
-__fenv_static inline int
-feenableexcept(int __mask)
-{
- fenv_t __old_fpsr, __new_fpsr;
-
- 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);
-}
-
-__fenv_static inline int
-fedisableexcept(int __mask)
-{
- fenv_t __old_fpsr, __new_fpsr;
-
- 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);
-}
-
-__fenv_static inline int
-fegetexcept(void)
-{
- fenv_t __fpsr;
-
- vmrs_fpscr(__fpsr);
- return (__fpsr & FE_ALL_EXCEPT);
-}
-
-#endif /* __BSD_VISIBLE */
-
diff --git a/newlib/libc/machine/arm/sys/fenv.h b/newlib/libc/machine/arm/sys/fenv.h
index 740995a1a..0224da38b 100644
--- a/newlib/libc/machine/arm/sys/fenv.h
+++ b/newlib/libc/machine/arm/sys/fenv.h
@@ -63,22 +63,11 @@ typedef int fexcept_t;
/* Rounding modes */
-#define VFP_FE_TONEAREST 0x00000000
-#define VFP_FE_UPWARD 0x00400000
-#define VFP_FE_DOWNWARD 0x00800000
-#define VFP_FE_TOWARDZERO 0x00c00000
+#define FE_TONEAREST 0x00000000
+#define FE_UPWARD 0x00400000
+#define FE_DOWNWARD 0x00800000
+#define FE_TOWARDZERO 0x00c00000
-#ifdef __ARM_PCS_VFP
-#define FE_TONEAREST VFP_FE_TONEAREST
-#define FE_UPWARD VFP_FE_UPWARD
-#define FE_DOWNWARD VFP_FE_DOWNWARD
-#define FE_TOWARDZERO VFP_FE_TOWARDZERO
-#else
-#define FE_TONEAREST 0x0000
-#define FE_TOWARDZERO 0x0001
-#define FE_UPWARD 0x0002
-#define FE_DOWNWARD 0x0003
-#endif
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
FE_UPWARD | FE_TOWARDZERO)
diff --git a/newlib/libm/machine/arm/Makefile.am b/newlib/libm/machine/arm/Makefile.am
index a64ee59d5..180a37f44 100644
--- a/newlib/libm/machine/arm/Makefile.am
+++ b/newlib/libm/machine/arm/Makefile.am
@@ -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
diff --git a/newlib/libm/machine/arm/fenv-softfp.c b/newlib/libm/machine/arm/fenv-softfp.c
deleted file mode 100644
index a576cc1b2..000000000
--- a/newlib/libm/machine/arm/fenv-softfp.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/*-
- * Copyright (c) 2013 Andrew Turner <andrew at 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"
-
diff --git a/newlib/libm/machine/arm/fenv-vfp.c b/newlib/libm/machine/arm/fenv-vfp.c
deleted file mode 100644
index 11a05ea54..000000000
--- a/newlib/libm/machine/arm/fenv-vfp.c
+++ /dev/null
@@ -1,37 +0,0 @@
-/*-
- * Copyright (c) 2013 Andrew Turner <andrew at 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.
- *
- * $FreeBSD$
- */
-
-#if defined(__VFP_FP__) && !defined(__ARM_PCS_VFP)
-#define SOFTFP_ABI
-#endif
-
-#ifndef SOFTFP_ABI
-#define FENV_MANGLE(x) __vfp_ ##x
-#include <machine/fenv-mangle.h>
-#include "fenv.c"
-#endif
diff --git a/newlib/libm/machine/arm/fenv.c b/newlib/libm/machine/arm/fenv.c
index 98125cacf..0df245df7 100644
--- a/newlib/libm/machine/arm/fenv.c
+++ b/newlib/libm/machine/arm/fenv.c
@@ -29,7 +29,6 @@
* $FreeBSD$
*/
-#define __fenv_static
#include <fenv.h>
#include <machine/acle-compat.h>
@@ -43,152 +42,40 @@
#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 __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);
#ifndef SOFTFP_ABI
-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);
+#define vmrs_fpscr(__r) __asm __volatile("vmrs %0, fpscr" : "=&r"(__r))
+#define vmsr_fpscr(__r) __asm __volatile("vmsr fpscr, %0" : : "r"(__r))
#endif
-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;
- }
-}
+#define _FPU_MASK_SHIFT 8
int feclearexcept(int excepts)
{
#ifndef SOFTFP_ABI
- __vfp_feclearexcept(excepts);
+ fexcept_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ __fpsr &= ~excepts;
+ vmsr_fpscr(__fpsr);
#endif
- __softfp_feclearexcept(excepts);
return (0);
}
int fegetexceptflag(fexcept_t *flagp, int excepts)
{
- fexcept_t __vfp_flagp;
- __vfp_flagp = 0;
#ifndef SOFTFP_ABI
- __vfp_fegetexceptflag(&__vfp_flagp, excepts);
+ fexcept_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ __fpsr &= ~excepts;
+ __fpsr |= *flagp & excepts;
+ vmsr_fpscr(__fpsr);
#endif
- __softfp_fegetexceptflag(flagp, excepts);
-
- *flagp |= __vfp_flagp;
return (0);
}
@@ -197,9 +84,12 @@ int fesetexceptflag(const fexcept_t *flagp, int excepts)
{
#ifndef SOFTFP_ABI
- __vfp_fesetexceptflag(flagp, excepts);
+ fexcept_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ __fpsr &= ~excepts;
+ __fpsr |= *flagp & excepts;
+ vmsr_fpscr(__fpsr);
#endif
- __softfp_fesetexceptflag(flagp, excepts);
return (0);
}
@@ -208,70 +98,86 @@ int feraiseexcept(int excepts)
{
#ifndef SOFTFP_ABI
- __vfp_feraiseexcept(excepts);
+ fexcept_t __ex = excepts;
+ fesetexceptflag(&__ex, excepts);
#endif
- __softfp_feraiseexcept(excepts);
return (0);
}
int fetestexcept(int excepts)
{
- int __got_excepts;
-
- __got_excepts = 0;
#ifndef SOFTFP_ABI
- __got_excepts = __vfp_fetestexcept(excepts);
+ fexcept_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ return (__fpsr & excepts);
#endif
- __got_excepts |= __softfp_fetestexcept(excepts);
- return (__got_excepts);
+ return (0);
}
int fegetround(void)
{
#ifndef SOFTFP_ABI
- return __softfp_round_from_vfp(__vfp_fegetround());
+ fenv_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ return (__fpsr & _ROUND_MASK);
+#endif
+
+#ifdef SOFTFP_ABI
+/* For soft float */
+
+#ifdef FE_TONEAREST
+ return FE_TONEAREST;
+#else
+ return 0;
+#endif
+
#endif
- return __softfp_fegetround();
}
int fesetround(int round)
{
#ifndef SOFTFP_ABI
- __vfp_fesetround(__softfp_round_to_vfp(round));
+ fenv_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ __fpsr &= ~(_ROUND_MASK);
+ __fpsr |= round;
+ vmsr_fpscr(__fpsr);
+ return (0);
#endif
- __softfp_fesetround(round);
return (0);
}
int fegetenv(fenv_t *envp)
{
- fenv_t __vfp_envp;
-
- __vfp_envp = 0;
+
#ifndef SOFTFP_ABI
- __vfp_fegetenv(&__vfp_envp);
+ vmrs_fpscr(*envp);
+ return 0;
#endif
- __softfp_fegetenv(envp);
- *envp |= __vfp_envp;
+
+ *envp |= 0;
return (0);
}
int feholdexcept(fenv_t *envp)
{
- fenv_t __vfp_envp;
- __vfp_envp = 0;
#ifndef SOFTFP_ABI
- __vfp_feholdexcept(&__vfp_envp);
+ fenv_t __env;
+ vmrs_fpscr(__env);
+ *envp = __env;
+ __env &= ~(FE_ALL_EXCEPT);
+ vmsr_fpscr(__env);
+ return (0);
+
#endif
- __softfp_feholdexcept(envp);
- *envp |= __vfp_envp;
+ *envp |= 0;
return (0);
}
@@ -280,10 +186,8 @@ int fesetenv(const fenv_t *envp)
{
#ifndef SOFTFP_ABI
- __vfp_fesetenv(envp);
+ vmsr_fpscr(*envp);
#endif
- __softfp_fesetenv(envp);
-
return (0);
}
@@ -291,51 +195,69 @@ int feupdateenv(const fenv_t *envp)
{
#ifndef SOFTFP_ABI
- __vfp_feupdateenv(envp);
+ fexcept_t __fpsr;
+ vmrs_fpscr(__fpsr);
+ vmsr_fpscr(*envp);
+ feraiseexcept(__fpsr & FE_ALL_EXCEPT);
+
+ return 0;
+#else
+
+#if defined FE_NOMASK_ENV && FE_ALL_EXCEPT != 0
+
+ if (envp == FE_NOMASK_ENV)
+ return 1;
+
+#endif
+
+ return 0;
+
#endif
- __softfp_feupdateenv(envp);
- return (0);
}
int feenableexcept(int __mask)
{
- int __unmasked;
-
- __unmasked = 0;
+
#ifndef SOFTFP_ABI
- __unmasked = __vfp_feenableexcept(__mask);
+ fenv_t __old_fpsr, __new_fpsr;
+ 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);
#endif
- __unmasked |= __softfp_feenableexcept(__mask);
- return (__unmasked);
+ return (0);
}
int fedisableexcept(int __mask)
{
- int __unmasked;
- __unmasked = 0;
#ifndef SOFTFP_ABI
- __unmasked = __vfp_fedisableexcept(__mask);
+ fenv_t __old_fpsr, __new_fpsr;
+
+ 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);
#endif
- __unmasked |= __softfp_fedisableexcept(__mask);
- return (__unmasked);
+ return (0);
}
int fegetexcept(void)
{
- int __unmasked;
- __unmasked = 0;
#ifndef SOFTFP_ABI
- __unmasked = __vfp_fegetexcept();
+ fenv_t __fpsr;
+
+ vmrs_fpscr(__fpsr);
+ return (__fpsr & FE_ALL_EXCEPT);
#endif
- __unmasked |= __softfp_fegetexcept();
- return (__unmasked);
+ return (0);
}
-#endif
--
2.17.1
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