Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 244 insertions, 0 deletions

diff --git a/include/iprt/nocrt/amd64/fenv.h b/include/iprt/nocrt/amd64/fenv.h
new file mode 100644
index 00000000..5c1f25a6
--- /dev/null
+++ b/include/iprt/nocrt/amd64/fenv.h
@@ -0,0 +1,244 @@
+/** @file
+ * IPRT / No-CRT - fenv.h, AMD64.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ * --------------------------------------------------------------------
+ *
+ * This code is based on:
+ *
+ * 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.
+ */
+
+#ifndef IPRT_INCLUDED_nocrt_amd64_fenv_h
+#define IPRT_INCLUDED_nocrt_amd64_fenv_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/types.h>
+
+typedef struct {
+        struct {
+                uint32_t      __control;
+                uint32_t      __status;
+                uint32_t      __tag;
+                char          __other[16];
+        } __x87;
+        uint32_t              __mxcsr;
+} fenv_t;
+
+typedef uint16_t      fexcept_t;
+
+/* Exception flags */
+#define FE_INVALID      0x01
+#define FE_DENORMAL     0x02
+#define FE_DIVBYZERO    0x04
+#define FE_OVERFLOW     0x08
+#define FE_UNDERFLOW    0x10
+#define FE_INEXACT      0x20
+#define FE_ALL_EXCEPT   (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
+                         FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* Rounding modes */
+#define FE_TONEAREST    0x0000
+#define FE_DOWNWARD     0x0400
+#define FE_UPWARD       0x0800
+#define FE_TOWARDZERO   0x0c00
+#define _ROUND_MASK     (FE_TONEAREST | FE_DOWNWARD | \
+                         FE_UPWARD | FE_TOWARDZERO)
+
+/*
+ * As compared to the x87 control word, the SSE unit's control word
+ * has the rounding control bits offset by 3 and the exception mask
+ * bits offset by 7.
+ */
+#define _SSE_ROUND_SHIFT        3
+#define _SSE_EMASK_SHIFT        7
+
+RT_C_DECLS_BEGIN
+
+/* Default floating-point environment */
+extern const fenv_t     RT_NOCRT(__fe_dfl_env);
+#define FE_DFL_ENV      (&__fe_dfl_env)
+
+#define __fldcw(__cw)           __asm __volatile("fldcw %0" : : "m" (__cw))
+#define __fldenv(__env)         __asm __volatile("fldenv %0" : : "m" (__env))
+#define __fnclex()              __asm __volatile("fnclex")
+#define __fnstenv(__env)        __asm __volatile("fnstenv %0" : "=m" (*(__env)))
+#define __fnstcw(__cw)          __asm __volatile("fnstcw %0" : "=m" (*(__cw)))
+#define __fnstsw(__sw)          __asm __volatile("fnstsw %0" : "=am" (*(__sw)))
+#define __fwait()               __asm __volatile("fwait")
+#define __ldmxcsr(__csr)        __asm __volatile("ldmxcsr %0" : : "m" (__csr))
+#define __stmxcsr(__csr)        __asm __volatile("stmxcsr %0" : "=m" (*(__csr)))
+
+#if RT_GNUC_PREREQ(4, 6)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wshadow"
+#endif
+
+DECLINLINE(int)
+feclearexcept(int __excepts)
+{
+        fenv_t __env;
+
+        if (__excepts == FE_ALL_EXCEPT) {
+                __fnclex();
+        } else {
+                __fnstenv(&__env.__x87);
+                __env.__x87.__status &= ~__excepts;
+                __fldenv(__env.__x87);
+        }
+        __stmxcsr(&__env.__mxcsr);
+        __env.__mxcsr &= ~__excepts;
+        __ldmxcsr(__env.__mxcsr);
+        return (0);
+}
+
+DECLINLINE(int)
+fegetexceptflag(fexcept_t *__flagp, int __excepts)
+{
+        int __mxcsr, __status;
+
+        __stmxcsr(&__mxcsr);
+        __fnstsw(&__status);
+        *__flagp = (__mxcsr | __status) & __excepts;
+        return (0);
+}
+
+int RT_NOCRT(fesetexceptflag)(const fexcept_t *__flagp, int __excepts);
+int RT_NOCRT(feraiseexcept)(int __excepts);
+
+DECLINLINE(int)
+fetestexcept(int __excepts)
+{
+        int __mxcsr, __status;
+
+        __stmxcsr(&__mxcsr);
+        __fnstsw(&__status);
+        return ((__status | __mxcsr) & __excepts);
+}
+
+DECLINLINE(int)
+fegetround(void)
+{
+        int __control;
+
+        /*
+         * We assume that the x87 and the SSE unit agree on the
+         * rounding mode.  Reading the control word on the x87 turns
+         * out to be about 5 times faster than reading it on the SSE
+         * unit on an Opteron 244.
+         */
+        __fnstcw(&__control);
+        return (__control & _ROUND_MASK);
+}
+
+DECLINLINE(int)
+fesetround(int __round)
+{
+        int __mxcsr, __control;
+
+        if (__round & ~_ROUND_MASK)
+                return (-1);
+
+        __fnstcw(&__control);
+        __control &= ~_ROUND_MASK;
+        __control |= __round;
+        __fldcw(__control);
+
+        __stmxcsr(&__mxcsr);
+        __mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
+        __mxcsr |= __round << _SSE_ROUND_SHIFT;
+        __ldmxcsr(__mxcsr);
+
+        return (0);
+}
+
+int RT_NOCRT(fegetenv)(fenv_t *__envp);
+int RT_NOCRT(feholdexcept)(fenv_t *__envp);
+
+DECLINLINE(int)
+fesetenv(const fenv_t *__envp)
+{
+
+        __fldenv(__envp->__x87);
+        __ldmxcsr(__envp->__mxcsr);
+        return (0);
+}
+
+int RT_NOCRT(feupdateenv)(const fenv_t *__envp);
+int RT_NOCRT(feenableexcept)(int __mask);
+int RT_NOCRT(fedisableexcept)(int __mask);
+
+DECLINLINE(int)
+fegetexcept(void)
+{
+        int __control;
+
+        /*
+         * We assume that the masks for the x87 and the SSE unit are
+         * the same.
+         */
+        __fnstcw(&__control);
+        return (~__control & FE_ALL_EXCEPT);
+}
+
+#if RT_GNUC_PREREQ(4, 6)
+# pragma GCC diagnostic pop
+#endif
+
+RT_C_DECLS_END
+
+#ifndef RT_WITHOUT_NOCRT_WRAPPERS
+# define fesetexceptflag RT_NOCRT(fesetexceptflag)
+# define feraiseexcept RT_NOCRT(feraiseexcept)
+# define fegetenv RT_NOCRT(fegetenv)
+# define feholdexcept RT_NOCRT(feholdexcept)
+# define feupdateenv RT_NOCRT(feupdateenv)
+# define feenableexcept RT_NOCRT(feenableexcept)
+# define fedisableexcept RT_NOCRT(fedisableexcept)
+# define __fe_dfl_env RT_NOCRT(__fe_dfl_env)
+#endif
+
+#endif /* !IPRT_INCLUDED_nocrt_amd64_fenv_h */