auto import from //depot/cupcake/@135843
diff --git a/libm/include/ia64/fenv.h b/libm/include/ia64/fenv.h
new file mode 100644
index 0000000..8c6b65b
--- /dev/null
+++ b/libm/include/ia64/fenv.h
@@ -0,0 +1,242 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD: src/lib/msun/ia64/fenv.h,v 1.4 2005/03/16 19:03:45 das Exp $
+ */
+
+#ifndef _FENV_H_
+#define _FENV_H_
+
+#include <sys/_types.h>
+
+typedef __uint64_t 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)
+
+__BEGIN_DECLS
+
+/* Default floating-point environment */
+extern const fenv_t __fe_dfl_env;
+#define FE_DFL_ENV (&__fe_dfl_env)
+
+#define _FPUSW_SHIFT 13
+
+#define __stfpsr(__r) __asm __volatile("mov %0=ar.fpsr" : "=r" (*(__r)))
+#define __ldfpsr(__r) __asm __volatile("mov ar.fpsr=%0;;" : : "r" (__r))
+
+static __inline int
+feclearexcept(int __excepts)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ __fpsr &= ~((fenv_t)__excepts << _FPUSW_SHIFT);
+ __ldfpsr(__fpsr);
+ return (0);
+}
+
+static __inline int
+fegetexceptflag(fexcept_t *__flagp, int __excepts)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ *__flagp = (fexcept_t)(__fpsr >> _FPUSW_SHIFT) & __excepts;
+ return (0);
+}
+
+static __inline int
+fesetexceptflag(const fexcept_t *__flagp, int __excepts)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ __fpsr &= ~((fenv_t)__excepts << _FPUSW_SHIFT);
+ __fpsr |= (fenv_t)(__excepts & *__flagp) << _FPUSW_SHIFT;
+ __ldfpsr(__fpsr);
+ return (0);
+}
+
+/*
+ * It is worthwhile to use the inline version of this function iff it
+ * is called with arguments that are compile-time constants (due to
+ * dead code elimination). Unfortunately, gcc isn't smart enough to
+ * figure this out automatically, and there's no way to tell it.
+ * We assume that constant arguments will be the common case.
+ */
+static __inline int
+feraiseexcept(int __excepts)
+{
+ volatile double d;
+
+ /*
+ * 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 (__excepts & FE_INVALID) {
+ d = 0.0;
+ d = 0.0 / d;
+ }
+ if (__excepts & FE_DIVBYZERO) {
+ d = 0.0;
+ d = 1.0 / d;
+ }
+ if (__excepts & FE_OVERFLOW) {
+ d = 0x1.ffp1023;
+ d *= 2.0;
+ }
+ if (__excepts & FE_UNDERFLOW) {
+ d = 0x1p-1022;
+ d /= 0x1p1023;
+ }
+ if (__excepts & FE_INEXACT) {
+ d = 0x1p-1022;
+ d += 1.0;
+ }
+ return (0);
+}
+
+static __inline int
+fetestexcept(int __excepts)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ return ((__fpsr >> _FPUSW_SHIFT) & __excepts);
+}
+
+
+static __inline int
+fegetround(void)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ return (__fpsr & _ROUND_MASK);
+}
+
+static __inline int
+fesetround(int __round)
+{
+ fenv_t __fpsr;
+
+ if (__round & ~_ROUND_MASK)
+ return (-1);
+ __stfpsr(&__fpsr);
+ __fpsr &= ~_ROUND_MASK;
+ __fpsr |= __round;
+ __ldfpsr(__fpsr);
+ return (0);
+}
+
+static __inline int
+fegetenv(fenv_t *__envp)
+{
+
+ __stfpsr(__envp);
+ return (0);
+}
+
+static __inline int
+feholdexcept(fenv_t *__envp)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ *__envp = __fpsr;
+ __fpsr &= ~((fenv_t)FE_ALL_EXCEPT << _FPUSW_SHIFT);
+ __fpsr |= FE_ALL_EXCEPT;
+ __ldfpsr(__fpsr);
+ return (0);
+}
+
+static __inline int
+fesetenv(const fenv_t *__envp)
+{
+
+ __ldfpsr(*__envp);
+ return (0);
+}
+
+int feupdateenv(const fenv_t *__envp);
+
+#if __BSD_VISIBLE
+
+static __inline int
+feenableexcept(int __mask)
+{
+ fenv_t __newfpsr, __oldfpsr;
+
+ __stfpsr(&__oldfpsr);
+ __newfpsr = __oldfpsr & ~(__mask & FE_ALL_EXCEPT);
+ __ldfpsr(__newfpsr);
+ return (~__oldfpsr & FE_ALL_EXCEPT);
+}
+
+static __inline int
+fedisableexcept(int __mask)
+{
+ fenv_t __newfpsr, __oldfpsr;
+
+ __stfpsr(&__oldfpsr);
+ __newfpsr = __oldfpsr | (__mask & FE_ALL_EXCEPT);
+ __ldfpsr(__newfpsr);
+ return (~__oldfpsr & FE_ALL_EXCEPT);
+}
+
+static __inline int
+fegetexcept(void)
+{
+ fenv_t __fpsr;
+
+ __stfpsr(&__fpsr);
+ return (~__fpsr & FE_ALL_EXCEPT);
+}
+
+#endif /* __BSD_VISIBLE */
+
+__END_DECLS
+
+#endif /* !_FENV_H_ */