Module Name: src
Committed By: nakayama
Date: Fri May 20 21:42:49 UTC 2011
Modified Files:
src/distrib/sets/lists/comp: md.sparc md.sparc64
src/include: fenv.h
src/lib/libm: Makefile
src/lib/libm/arch/sparc64: fenv.c
src/sys/arch/sparc/include: Makefile ieeefp.h
src/sys/arch/sparc64/include: fenv.h
src/tests/lib/libc/stdlib: t_strtod.c
Added Files:
src/lib/libm/arch/sparc: fenv.c
src/sys/arch/sparc/include: fenv.h
Log Message:
Add fenv support for sparc. Mostly copied from sparc64 and share with it.
To generate a diff of this commit:
cvs rdiff -u -r1.72 -r1.73 src/distrib/sets/lists/comp/md.sparc
cvs rdiff -u -r1.97 -r1.98 src/distrib/sets/lists/comp/md.sparc64
cvs rdiff -u -r1.5 -r1.6 src/include/fenv.h
cvs rdiff -u -r1.109 -r1.110 src/lib/libm/Makefile
cvs rdiff -u -r0 -r1.1 src/lib/libm/arch/sparc/fenv.c
cvs rdiff -u -r1.1 -r1.2 src/lib/libm/arch/sparc64/fenv.c
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/sparc/include/Makefile
cvs rdiff -u -r0 -r1.1 src/sys/arch/sparc/include/fenv.h
cvs rdiff -u -r1.6 -r1.7 src/sys/arch/sparc/include/ieeefp.h
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/sparc64/include/fenv.h
cvs rdiff -u -r1.10 -r1.11 src/tests/lib/libc/stdlib/t_strtod.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/distrib/sets/lists/comp/md.sparc
diff -u src/distrib/sets/lists/comp/md.sparc:1.72 src/distrib/sets/lists/comp/md.sparc:1.73
--- src/distrib/sets/lists/comp/md.sparc:1.72 Thu Apr 14 10:07:49 2011
+++ src/distrib/sets/lists/comp/md.sparc Fri May 20 21:42:48 2011
@@ -1,4 +1,4 @@
-# $NetBSD: md.sparc,v 1.72 2011/04/14 10:07:49 mrg Exp $
+# $NetBSD: md.sparc,v 1.73 2011/05/20 21:42:48 nakayama Exp $
./usr/include/ieeefp.h comp-c-include
./usr/include/sparc comp-c-include
./usr/include/sparc/_G_config.h comp-obsolete obsolete
@@ -20,6 +20,7 @@
./usr/include/sparc/endian.h comp-c-include
./usr/include/sparc/endian_machdep.h comp-c-include
./usr/include/sparc/fbio.h comp-obsolete obsolete
+./usr/include/sparc/fenv.h comp-c-include
./usr/include/sparc/float.h comp-c-include
./usr/include/sparc/frame.h comp-c-include
./usr/include/sparc/fsr.h comp-c-include
Index: src/distrib/sets/lists/comp/md.sparc64
diff -u src/distrib/sets/lists/comp/md.sparc64:1.97 src/distrib/sets/lists/comp/md.sparc64:1.98
--- src/distrib/sets/lists/comp/md.sparc64:1.97 Fri May 13 01:56:27 2011
+++ src/distrib/sets/lists/comp/md.sparc64 Fri May 20 21:42:48 2011
@@ -1,4 +1,4 @@
-# $NetBSD: md.sparc64,v 1.97 2011/05/13 01:56:27 christos Exp $
+# $NetBSD: md.sparc64,v 1.98 2011/05/20 21:42:48 nakayama Exp $
./usr/include/ieeefp.h comp-c-include
./usr/include/sparc comp-c-include
./usr/include/sparc/_G_config.h comp-obsolete obsolete
@@ -20,6 +20,7 @@
./usr/include/sparc/endian.h comp-c-include
./usr/include/sparc/endian_machdep.h comp-c-include
./usr/include/sparc/fbio.h comp-obsolete obsolete
+./usr/include/sparc/fenv.h comp-c-include
./usr/include/sparc/float.h comp-c-include
./usr/include/sparc/frame.h comp-c-include
./usr/include/sparc/fsr.h comp-c-include
Index: src/include/fenv.h
diff -u src/include/fenv.h:1.5 src/include/fenv.h:1.6
--- src/include/fenv.h:1.5 Mon May 16 14:50:36 2011
+++ src/include/fenv.h Fri May 20 21:42:48 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: fenv.h,v 1.5 2011/05/16 14:50:36 martin Exp $ */
+/* $NetBSD: fenv.h,v 1.6 2011/05/20 21:42:48 nakayama Exp $ */
/*
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
@@ -25,7 +25,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
-#if !defined(__i386__) && !defined(__amd64__) && !defined(__sparc_v9__)
+#if !defined(__i386__) && !defined(__amd64__) && !defined(__sparc__)
#error "fenv.h is currently not supported for this architecture"
#endif
Index: src/lib/libm/Makefile
diff -u src/lib/libm/Makefile:1.109 src/lib/libm/Makefile:1.110
--- src/lib/libm/Makefile:1.109 Tue May 10 09:07:51 2011
+++ src/lib/libm/Makefile Fri May 20 21:42:48 2011
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.109 2011/05/10 09:07:51 jruoho Exp $
+# $NetBSD: Makefile,v 1.110 2011/05/20 21:42:48 nakayama Exp $
#
# @(#)Makefile 5.1beta 93/09/24
#
@@ -50,6 +50,9 @@
.if (${MACHINE_ARCH} == "alpha")
.PATH: ${.CURDIR}/arch/alpha
ARCH_SRCS = s_copysign.S s_copysignf.S lrint.S
+.elif (${MACHINE_ARCH} == "sparc")
+.PATH: ${.CURDIR}/arch/sparc
+COMMON_SRCS+= fenv.c
.elif (${MACHINE_ARCH} == "sparc64")
.PATH: ${.CURDIR}/arch/sparc64
COMMON_SRCS+= fenv.c
Index: src/lib/libm/arch/sparc64/fenv.c
diff -u src/lib/libm/arch/sparc64/fenv.c:1.1 src/lib/libm/arch/sparc64/fenv.c:1.2
--- src/lib/libm/arch/sparc64/fenv.c:1.1 Mon Jan 31 00:19:33 2011
+++ src/lib/libm/arch/sparc64/fenv.c Fri May 20 21:42:49 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: fenv.c,v 1.1 2011/01/31 00:19:33 christos Exp $ */
+/* $NetBSD: fenv.c,v 1.2 2011/05/20 21:42:49 nakayama Exp $ */
/*-
* Copyright (c) 2004-2005 David Schultz <d...@freebsd.org>
@@ -24,11 +24,13 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: fenv.c,v 1.1 2011/01/31 00:19:33 christos Exp $");
+__RCSID("$NetBSD: fenv.c,v 1.2 2011/05/20 21:42:49 nakayama Exp $");
#include <assert.h>
#include <fenv.h>
+#ifdef __arch64__
+
/* Load floating-point state register (all 64bits) */
#define __ldxfsr(__r) __asm__ __volatile__ \
("ldx %0, %%fsr" : : "m" (__r))
@@ -37,6 +39,18 @@
#define __stxfsr(__r) __asm__ __volatile__ \
("stx %%fsr, %0" : "=m" (*(__r)))
+#else /* !__arch64__ */
+
+/* Load floating-point state register (32bits) */
+#define __ldxfsr(__r) __asm__ __volatile__ \
+ ("ld %0, %%fsr" : : "m" (__r))
+
+/* Save floating-point state register (32bits) */
+#define __stxfsr(__r) __asm__ __volatile__ \
+ ("st %%fsr, %0" : "=m" (*(__r)))
+
+#endif /* __arch64__ */
+
/*
* The feclearexcept() function clears the supported floating-point exceptions
* represented by `excepts'.
Index: src/sys/arch/sparc/include/Makefile
diff -u src/sys/arch/sparc/include/Makefile:1.29 src/sys/arch/sparc/include/Makefile:1.30
--- src/sys/arch/sparc/include/Makefile:1.29 Fri Feb 9 21:55:12 2007
+++ src/sys/arch/sparc/include/Makefile Fri May 20 21:42:49 2011
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.29 2007/02/09 21:55:12 ad Exp $
+# $NetBSD: Makefile,v 1.30 2011/05/20 21:42:49 nakayama Exp $
INCSDIR= /usr/include/sparc
@@ -7,7 +7,7 @@
cdefs.h cgtworeg.h cpu.h cpuconf.h \
disklabel.h \
eeprom.h elf_machdep.h endian.h endian_machdep.h \
- float.h frame.h fsr.h \
+ fenv.h float.h frame.h fsr.h \
idprom.h ieee.h ieeefp.h \
int_const.h int_fmtio.h int_limits.h int_mwgwtypes.h int_types.h \
kbd.h kbio.h kcore.h \
Index: src/sys/arch/sparc/include/ieeefp.h
diff -u src/sys/arch/sparc/include/ieeefp.h:1.6 src/sys/arch/sparc/include/ieeefp.h:1.7
--- src/sys/arch/sparc/include/ieeefp.h:1.6 Sun Apr 24 11:32:36 2011
+++ src/sys/arch/sparc/include/ieeefp.h Fri May 20 21:42:49 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: ieeefp.h,v 1.6 2011/04/24 11:32:36 tron Exp $ */
+/* $NetBSD: ieeefp.h,v 1.7 2011/05/20 21:42:49 nakayama Exp $ */
/*
* Written by J.T. Conklin, Apr 6, 1995
@@ -12,11 +12,6 @@
#if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
-#if !defined(__sparc64__)
-typedef int fenv_t;
-typedef int fexcept_t;
-#endif
-
#define FE_INEXACT 0x01 /* imprecise (loss of precision) */
#define FE_DIVBYZERO 0x02 /* divide-by-zero exception */
#define FE_UNDERFLOW 0x04 /* overflow exception */
Index: src/sys/arch/sparc64/include/fenv.h
diff -u src/sys/arch/sparc64/include/fenv.h:1.1 src/sys/arch/sparc64/include/fenv.h:1.2
--- src/sys/arch/sparc64/include/fenv.h:1.1 Mon Jan 31 00:19:34 2011
+++ src/sys/arch/sparc64/include/fenv.h Fri May 20 21:42:49 2011
@@ -1,80 +1,3 @@
-/* $NetBSD: fenv.h,v 1.1 2011/01/31 00:19:34 christos Exp $ */
+/* $NetBSD: fenv.h,v 1.2 2011/05/20 21:42:49 nakayama Exp $ */
-/*-
- * Copyright (c) 2004-2005 David Schultz <d...@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 _SPARC64_FENV_H_
-#define _SPARC64_FENV_H_
-
-#include <sys/stdint.h>
-
-typedef uint64_t fenv_t;
-typedef uint64_t fexcept_t;
-
-/*
- * 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 0x0
-#define FE_TOWARDZERO 0x1
-#define FE_UPWARD 0x2
-#define FE_DOWNWARD 0x3
-#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
- FE_UPWARD | FE_TOWARDZERO)
-#define _ROUND_SHIFT 30
-
-__BEGIN_DECLS
-
-/* 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)
-
-__END_DECLS
-
-#endif /* !_SPARC64_FENV_H_ */
+#include <sparc/fenv.h>
Index: src/tests/lib/libc/stdlib/t_strtod.c
diff -u src/tests/lib/libc/stdlib/t_strtod.c:1.10 src/tests/lib/libc/stdlib/t_strtod.c:1.11
--- src/tests/lib/libc/stdlib/t_strtod.c:1.10 Mon May 16 07:59:18 2011
+++ src/tests/lib/libc/stdlib/t_strtod.c Fri May 20 21:42:49 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: t_strtod.c,v 1.10 2011/05/16 07:59:18 he Exp $ */
+/* $NetBSD: t_strtod.c,v 1.11 2011/05/20 21:42:49 nakayama Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
/* Public domain, Otto Moerbeek <o...@drijf.net>, 2006. */
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_strtod.c,v 1.10 2011/05/16 07:59:18 he Exp $");
+__RCSID("$NetBSD: t_strtod.c,v 1.11 2011/05/20 21:42:49 nakayama Exp $");
#include <errno.h>
#include <math.h>
@@ -43,7 +43,7 @@
#include <atf-c.h>
#include <atf-c/config.h>
-#if defined(__i386__) || defined(__amd64__) || defined(__sparc64__)
+#if defined(__i386__) || defined(__amd64__) || defined(__sparc__)
#include <fenv.h>
#endif
@@ -136,7 +136,7 @@
ATF_TC_BODY(strtod_round, tc)
{
-#if defined(__i386__) || defined(__amd64__) || defined(__sparc64__)
+#if defined(__i386__) || defined(__amd64__) || defined(__sparc__)
const char *val;
double d1, d2;
Added files:
Index: src/lib/libm/arch/sparc/fenv.c
diff -u /dev/null src/lib/libm/arch/sparc/fenv.c:1.1
--- /dev/null Fri May 20 21:42:49 2011
+++ src/lib/libm/arch/sparc/fenv.c Fri May 20 21:42:49 2011
@@ -0,0 +1,329 @@
+/* $NetBSD: fenv.c,v 1.1 2011/05/20 21:42:49 nakayama Exp $ */
+
+/*-
+ * Copyright (c) 2004-2005 David Schultz <d...@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 1.1 2011/05/20 21:42:49 nakayama Exp $");
+
+#include <assert.h>
+#include <fenv.h>
+
+/* 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;
+}
Index: src/sys/arch/sparc/include/fenv.h
diff -u /dev/null src/sys/arch/sparc/include/fenv.h:1.1
--- /dev/null Fri May 20 21:42:49 2011
+++ src/sys/arch/sparc/include/fenv.h Fri May 20 21:42:49 2011
@@ -0,0 +1,85 @@
+/* $NetBSD: fenv.h,v 1.1 2011/05/20 21:42:49 nakayama Exp $ */
+
+/*-
+ * Copyright (c) 2004-2005 David Schultz <d...@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 _SPARC_FENV_H_
+#define _SPARC_FENV_H_
+
+#include <sys/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 0x0
+#define FE_TOWARDZERO 0x1
+#define FE_UPWARD 0x2
+#define FE_DOWNWARD 0x3
+#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
+ FE_UPWARD | FE_TOWARDZERO)
+#define _ROUND_SHIFT 30
+
+__BEGIN_DECLS
+
+/* 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)
+
+__END_DECLS
+
+#endif /* !_SPARC_FENV_H_ */
