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[src/trunk]: src/sys/arch/alpha/include fenv.h for alpha
details: https://anonhg.NetBSD.org/src/rev/32790bce3303
branches: trunk
changeset: 347378:32790bce3303
user: christos <christos%NetBSD.org@localhost>
date: Tue Aug 23 09:59:26 2016 +0000
description:
fenv.h for alpha
diffstat:
sys/arch/alpha/include/Makefile | 4 +-
sys/arch/alpha/include/fenv.h | 186 ++++++++++++++++++++++++++++++++++++++++
sys/arch/alpha/include/ieeefp.h | 23 +----
3 files changed, 190 insertions(+), 23 deletions(-)
diffs (245 lines):
diff -r bff63cbb65e3 -r 32790bce3303 sys/arch/alpha/include/Makefile
--- a/sys/arch/alpha/include/Makefile Tue Aug 23 09:59:20 2016 +0000
+++ b/sys/arch/alpha/include/Makefile Tue Aug 23 09:59:26 2016 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.32 2011/08/12 22:22:49 dyoung Exp $
+# $NetBSD: Makefile,v 1.33 2016/08/23 09:59:26 christos Exp $
INCSDIR= /usr/include/alpha
@@ -7,7 +7,7 @@
cdefs.h cfbreg.h cpu.h cpuconf.h \
disklabel.h \
ecoff_machdep.h elf_machdep.h endian.h endian_machdep.h \
- float.h fpu.h frame.h \
+ fenv.h float.h fpu.h frame.h \
ieee.h ieeefp.h \
int_const.h int_fmtio.h int_limits.h int_mwgwtypes.h int_types.h \
intr.h \
diff -r bff63cbb65e3 -r 32790bce3303 sys/arch/alpha/include/fenv.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/alpha/include/fenv.h Tue Aug 23 09:59:26 2016 +0000
@@ -0,0 +1,186 @@
+/* $NetBSD: fenv.h,v 1.1 2016/08/23 09:59:26 christos 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
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: src/lib/msun/alpha/fenv.h,v 1.3 2005/03/16 19:03:44 das Exp $
+ */
+
+#ifndef _ALPHA_FENV_H_
+#define _ALPHA_FENV_H_
+
+#include <sys/stdint.h>
+
+typedef __uint64_t fenv_t;
+typedef __uint16_t fexcept_t;
+
+/* Exception flags */
+#define FE_INVALID 0x02
+#define FE_DIVBYZERO 0x04
+#define FE_OVERFLOW 0x08
+#define FE_UNDERFLOW 0x10
+#define FE_INEXACT 0x20
+#define FE_INTOVF 0x40 /* not maskable */
+#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INTOVF | \
+ FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* Rounding modes */
+#define FE_TOWARDZERO 0x00
+#define FE_DOWNWARD 0x01
+#define FE_TONEAREST 0x02
+#define FE_UPWARD 0x03
+#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
+ FE_UPWARD | FE_TOWARDZERO)
+#define _ROUND_SHIFT 58
+
+#define _FPUSW_SHIFT 51
+
+#define __excb() __asm __volatile("excb")
+#define __mf_fpcr(__cw) __asm __volatile("mf_fpcr %0" : "=f" (*(__cw)))
+#define __mt_fpcr(__cw) __asm __volatile("mt_fpcr %0" : : "f" (__cw))
+
+union __fpcr {
+ double __d;
+ fenv_t __bits;
+};
+
+__BEGIN_DECLS
+
+/* Default floating-point environment */
+extern const fenv_t __fe_dfl_env;
+#define FE_DFL_ENV (&__fe_dfl_env)
+
+static __inline int
+feclearexcept(int __excepts)
+{
+ union __fpcr __r;
+
+ __excb();
+ __mf_fpcr(&__r.__d);
+ __r.__bits &= ~((fenv_t)__excepts << _FPUSW_SHIFT);
+ __mt_fpcr(__r.__d);
+ __excb();
+ return 0;
+}
+
+static __inline int
+fegetexceptflag(fexcept_t *__flagp, int __excepts)
+{
+ union __fpcr __r;
+
+ __excb();
+ __mf_fpcr(&__r.__d);
+ __excb();
+ *__flagp = (__r.__bits >> _FPUSW_SHIFT) & __excepts;
+ return 0;
+}
+
+static __inline int
+fesetexceptflag(const fexcept_t *__flagp, int __excepts)
+{
+ union __fpcr __r;
+ fenv_t __xflag, __xexcepts;
+
+ __xflag = (fenv_t)*__flagp << _FPUSW_SHIFT;
+ __xexcepts = (fenv_t)__excepts << _FPUSW_SHIFT;
+ __excb();
+ __mf_fpcr(&__r.__d);
+ __r.__bits &= ~__xexcepts;
+ __r.__bits |= __xflag & __xexcepts;
+ __mt_fpcr(__r.__d);
+ __excb();
+ return 0;
+}
+
+static __inline int
+feraiseexcept(int __excepts)
+{
+
+ /*
+ * XXX Generating exceptions this way does not actually invoke
+ * a userland trap handler when enabled, but neither do
+ * arithmetic operations as far as I can tell. Perhaps there
+ * are more bugs in the kernel trap handler.
+ */
+ fexcept_t __ex = __excepts;
+ fesetexceptflag(&__ex, __excepts);
+ return 0;
+}
+
+static __inline int
+fetestexcept(int __excepts)
+{
+ union __fpcr __r;
+
+ __excb();
+ __mf_fpcr(&__r.__d);
+ __excb();
+ return (__r.__bits >> _FPUSW_SHIFT) & __excepts;
+}
+
+static __inline int
+fegetround(void)
+{
+ union __fpcr __r;
+
+ /*
+ * No exception barriers should be required here if we assume
+ * that only fesetround() can change the rounding mode.
+ */
+ __mf_fpcr(&__r.__d);
+ return (int)(__r.__bits >> _ROUND_SHIFT) & _ROUND_MASK;
+}
+
+static __inline int
+fesetround(int __round)
+{
+ union __fpcr __r;
+
+ if (__round & ~_ROUND_MASK)
+ return (-1);
+ __excb();
+ __mf_fpcr(&__r.__d);
+ __r.__bits &= ~((fenv_t)_ROUND_MASK << _ROUND_SHIFT);
+ __r.__bits |= (fenv_t)__round << _ROUND_SHIFT;
+ __mt_fpcr(__r.__d);
+ __excb();
+ return 0;
+}
+
+int fegetenv(fenv_t *);
+int feholdexcept(fenv_t *);
+int fesetenv(const fenv_t *);
+int feupdateenv(const fenv_t *);
+
+#if defined(_NETBSD_SOURCE) || defined(_GNU_SOURCE)
+int feenableexcept(int);
+int fedisableexcept(int);
+int fegetexcept(void);
+#endif /* _NETBSD_SOURCE || _GNU_SOURCE */
+
+
+__END_DECLS
+
+#endif /* !_ALPHA_FENV_H_ */
diff -r bff63cbb65e3 -r 32790bce3303 sys/arch/alpha/include/ieeefp.h
--- a/sys/arch/alpha/include/ieeefp.h Tue Aug 23 09:59:20 2016 +0000
+++ b/sys/arch/alpha/include/ieeefp.h Tue Aug 23 09:59:26 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ieeefp.h,v 1.8 2012/02/06 02:14:13 matt Exp $ */
+/* $NetBSD: ieeefp.h,v 1.9 2016/08/23 09:59:26 christos Exp $ */
/*
* Written by J.T. Conklin, Apr 28, 1995
@@ -12,26 +12,7 @@
#if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
-typedef int fenv_t;
-typedef int fexcept_t;
-
-#define FE_INVALID 0x01 /* invalid operation exception */
-#define FE_DIVBYZERO 0x02 /* divide-by-zero exception */
-#define FE_OVERFLOW 0x04 /* overflow exception */
-#define FE_UNDERFLOW 0x08 /* underflow exception */
-#define FE_INEXACT 0x10 /* imprecise (loss of precision; "inexact") */
-#define FE_IOVERFLOW 0x20 /* integer overflow */
-
-#define FE_ALL_EXCEPT 0x3f
-
-/*
- * These bits match the fpcr as well as bits 12:11
- * in fp operate instructions
- */
-#define FE_TOWARDZERO 0 /* round to zero (truncate) */
-#define FE_DOWNWARD 1 /* round toward negative infinity */
-#define FE_TONEAREST 2 /* round to nearest representable number */
-#define FE_UPWARD 3 /* round toward positive infinity */
+#include <machine/fenv.h>
#if !defined(_ISOC99_SOURCE)
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