auto import from //depot/cupcake/@135843
diff --git a/libm/include/powerpc/fenv.h b/libm/include/powerpc/fenv.h
new file mode 100644
index 0000000..3fd2389
--- /dev/null
+++ b/libm/include/powerpc/fenv.h
@@ -0,0 +1,263 @@
+/*-
+ * 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/powerpc/fenv.h,v 1.3 2005/03/16 19:03:45 das Exp $
+ */
+
+#ifndef _FENV_H_
+#define _FENV_H_
+
+#include <sys/_types.h>
+
+typedef __uint32_t fenv_t;
+typedef __uint32_t fexcept_t;
+
+/* Exception flags */
+#define FE_INEXACT 0x02000000
+#define FE_DIVBYZERO 0x04000000
+#define FE_UNDERFLOW 0x08000000
+#define FE_OVERFLOW 0x10000000
+#define FE_INVALID 0x20000000 /* all types of invalid FP ops */
+
+/*
+ * The PowerPC architecture has extra invalid flags that indicate the
+ * specific type of invalid operation occurred. These flags may be
+ * tested, set, and cleared---but not masked---separately. All of
+ * these bits are cleared when FE_INVALID is cleared, but only
+ * FE_VXSOFT is set when FE_INVALID is explicitly set in software.
+ */
+#define FE_VXCVI 0x00000100 /* invalid integer convert */
+#define FE_VXSQRT 0x00000200 /* square root of a negative */
+#define FE_VXSOFT 0x00000400 /* software-requested exception */
+#define FE_VXVC 0x00080000 /* ordered comparison involving NaN */
+#define FE_VXIMZ 0x00100000 /* inf * 0 */
+#define FE_VXZDZ 0x00200000 /* 0 / 0 */
+#define FE_VXIDI 0x00400000 /* inf / inf */
+#define FE_VXISI 0x00800000 /* inf - inf */
+#define FE_VXSNAN 0x01000000 /* operation on a signalling NaN */
+#define FE_ALL_INVALID (FE_VXCVI | FE_VXSQRT | FE_VXSOFT | FE_VXVC | \
+ FE_VXIMZ | FE_VXZDZ | FE_VXIDI | FE_VXISI | \
+ FE_VXSNAN | FE_INVALID)
+#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
+ FE_ALL_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* Rounding modes */
+#define FE_TONEAREST 0x0000
+#define FE_TOWARDZERO 0x0001
+#define FE_UPWARD 0x0002
+#define FE_DOWNWARD 0x0003
+#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)
+
+/* We need to be able to map status flag positions to mask flag positions */
+#define _FPUSW_SHIFT 22
+#define _ENABLE_MASK ((FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
+ FE_OVERFLOW | FE_UNDERFLOW) >> _FPUSW_SHIFT)
+
+#define __mffs(__env) __asm __volatile("mffs %0" : "=f" (*(__env)))
+#define __mtfsf(__env) __asm __volatile("mtfsf 255,%0" : : "f" (__env))
+
+union __fpscr {
+ double __d;
+ struct {
+ __uint32_t __junk;
+ fenv_t __reg;
+ } __bits;
+};
+
+static __inline int
+feclearexcept(int __excepts)
+{
+ union __fpscr __r;
+
+ if (__excepts & FE_INVALID)
+ __excepts |= FE_ALL_INVALID;
+ __mffs(&__r.__d);
+ __r.__bits.__reg &= ~__excepts;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+fegetexceptflag(fexcept_t *__flagp, int __excepts)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ *__flagp = __r.__bits.__reg & __excepts;
+ return (0);
+}
+
+static __inline int
+fesetexceptflag(const fexcept_t *__flagp, int __excepts)
+{
+ union __fpscr __r;
+
+ if (__excepts & FE_INVALID)
+ __excepts |= FE_ALL_EXCEPT;
+ __mffs(&__r.__d);
+ __r.__bits.__reg &= ~__excepts;
+ __r.__bits.__reg |= *__flagp & __excepts;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+feraiseexcept(int __excepts)
+{
+ union __fpscr __r;
+
+ if (__excepts & FE_INVALID)
+ __excepts |= FE_VXSOFT;
+ __mffs(&__r.__d);
+ __r.__bits.__reg |= __excepts;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+fetestexcept(int __excepts)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ return (__r.__bits.__reg & __excepts);
+}
+
+static __inline int
+fegetround(void)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ return (__r.__bits.__reg & _ROUND_MASK);
+}
+
+static __inline int
+fesetround(int __round)
+{
+ union __fpscr __r;
+
+ if (__round & ~_ROUND_MASK)
+ return (-1);
+ __mffs(&__r.__d);
+ __r.__bits.__reg &= ~_ROUND_MASK;
+ __r.__bits.__reg |= __round;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+fegetenv(fenv_t *__envp)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ *__envp = __r.__bits.__reg;
+ return (0);
+}
+
+static __inline int
+feholdexcept(fenv_t *__envp)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ *__envp = __r.__d;
+ __r.__bits.__reg &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+fesetenv(const fenv_t *__envp)
+{
+ union __fpscr __r;
+
+ __r.__bits.__reg = *__envp;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+static __inline int
+feupdateenv(const fenv_t *__envp)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ __r.__bits.__reg &= FE_ALL_EXCEPT;
+ __r.__bits.__reg |= *__envp;
+ __mtfsf(__r.__d);
+ return (0);
+}
+
+#if __BSD_VISIBLE
+
+static __inline int
+feenableexcept(int __mask)
+{
+ union __fpscr __r;
+ fenv_t __oldmask;
+
+ __mffs(&__r.__d);
+ __oldmask = __r.__bits.__reg;
+ __r.__bits.__reg |= (__mask & FE_ALL_EXCEPT) >> _FPUSW_SHIFT;
+ __mtfsf(__r.__d);
+ return ((__oldmask & _ENABLE_MASK) << _FPUSW_SHIFT);
+}
+
+static __inline int
+fedisableexcept(int __mask)
+{
+ union __fpscr __r;
+ fenv_t __oldmask;
+
+ __mffs(&__r.__d);
+ __oldmask = __r.__bits.__reg;
+ __r.__bits.__reg &= ~((__mask & FE_ALL_EXCEPT) >> _FPUSW_SHIFT);
+ __mtfsf(__r.__d);
+ return ((__oldmask & _ENABLE_MASK) << _FPUSW_SHIFT);
+}
+
+static __inline int
+fegetexcept(void)
+{
+ union __fpscr __r;
+
+ __mffs(&__r.__d);
+ return ((__r.__bits.__reg & _ENABLE_MASK) << _FPUSW_SHIFT);
+}
+
+#endif /* __BSD_VISIBLE */
+
+__END_DECLS
+
+#endif /* !_FENV_H_ */