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[src/trunk]: src Add fenv support for sparc. Mostly copied from sparc64 and ...
details: https://anonhg.NetBSD.org/src/rev/077a769934cb
branches: trunk
changeset: 765178:077a769934cb
user: nakayama <nakayama%NetBSD.org@localhost>
date: Fri May 20 21:42:48 2011 +0000
description:
Add fenv support for sparc. Mostly copied from sparc64 and share with it.
diffstat:
distrib/sets/lists/comp/md.sparc | 3 +-
distrib/sets/lists/comp/md.sparc64 | 3 +-
include/fenv.h | 4 +-
lib/libm/Makefile | 5 +-
lib/libm/arch/sparc/fenv.c | 329 +++++++++++++++++++++++++++++++++++++
lib/libm/arch/sparc64/fenv.c | 18 +-
sys/arch/sparc/include/Makefile | 4 +-
sys/arch/sparc/include/fenv.h | 85 +++++++++
sys/arch/sparc/include/ieeefp.h | 7 +-
sys/arch/sparc64/include/fenv.h | 81 +--------
tests/lib/libc/stdlib/t_strtod.c | 8 +-
11 files changed, 449 insertions(+), 98 deletions(-)
diffs (truncated from 697 to 300 lines):
diff -r c4022c4c9ffa -r 077a769934cb distrib/sets/lists/comp/md.sparc
--- a/distrib/sets/lists/comp/md.sparc Fri May 20 21:35:02 2011 +0000
+++ b/distrib/sets/lists/comp/md.sparc Fri May 20 21:42:48 2011 +0000
@@ -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
diff -r c4022c4c9ffa -r 077a769934cb distrib/sets/lists/comp/md.sparc64
--- a/distrib/sets/lists/comp/md.sparc64 Fri May 20 21:35:02 2011 +0000
+++ b/distrib/sets/lists/comp/md.sparc64 Fri May 20 21:42:48 2011 +0000
@@ -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
diff -r c4022c4c9ffa -r 077a769934cb include/fenv.h
--- a/include/fenv.h Fri May 20 21:35:02 2011 +0000
+++ b/include/fenv.h Fri May 20 21:42:48 2011 +0000
@@ -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
diff -r c4022c4c9ffa -r 077a769934cb lib/libm/Makefile
--- a/lib/libm/Makefile Fri May 20 21:35:02 2011 +0000
+++ b/lib/libm/Makefile Fri May 20 21:42:48 2011 +0000
@@ -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
diff -r c4022c4c9ffa -r 077a769934cb lib/libm/arch/sparc/fenv.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libm/arch/sparc/fenv.c Fri May 20 21:42:48 2011 +0000
@@ -0,0 +1,329 @@
+/* $NetBSD: fenv.c,v 1.1 2011/05/20 21:42:49 nakayama Exp $ */
+
+/*-
+ * Copyright (c) 2004-2005 David Schultz <das%FreeBSD.ORG@localhost>
+ * 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;
+}
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