+++ /dev/null
-/* Raise given exceptions.
- Copyright (C) 1997,98,99,2000,01,02 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson <rth@tamu.edu>, 1997.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <fenv_libc.h>
-
-int
-__feraiseexcept (int excepts)
-{
- unsigned long int tmp;
-
- /* Get the current exception state. */
- tmp = __ieee_get_fp_control ();
-
- /* Set all the bits that were called for. */
- tmp |= (excepts & SWCR_STATUS_MASK);
-
- /* And store it back. */
- __ieee_set_fp_control (tmp);
-
- /* Success. */
- return 0;
-}
-
-#include <shlib-compat.h>
-#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
-strong_alias (__feraiseexcept, __old_feraiseexcept)
-compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
-#endif
-
-libm_hidden_ver (__feraiseexcept, feraiseexcept)
-versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
--- /dev/null
+/* Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <fenv_libc.h>
+#include <sysdep.h>
+#include <float.h>
+#include "kernel-features.h"
+#include "kernel_sysinfo.h"
+
+
+int
+__feraiseexcept (int excepts)
+{
+ INTERNAL_SYSCALL_DECL (err);
+ unsigned long t = excepts;
+ long r;
+
+ r = INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_RAISE_EXCEPTION, &t);
+
+#ifndef __ASSUME_IEEE_RAISE_EXCEPTION
+ if (!INTERNAL_SYSCALL_ERROR_P (r, err))
+ return 0;
+
+ double d;
+
+ /* If we got an error from SSI_IEEE_RAISE_EXCEPTION, assume it means that
+ the system call isn't actually implemented. Do the best we can. */
+
+ /* Invalid implemented with 0 / 0 -> NaN. */
+ if (excepts & FE_INVALID)
+ __asm__ __volatile__ ("divs/su $f31,$f31,%0; trapb" : "=f"(d) : );
+
+ /* Division By Zero implemented with 1 / 0 -> NaN. */
+ if (excepts & FE_DIVBYZERO)
+ __asm__ __volatile__ ("divs/su %1,$f31,%0; trapb" : "=&f"(d) : "f"(1.0f));
+
+ /* Overflow and underflow cannot be had all by themselves. We can
+ generate them with arithmetic, but we always get INEXACT raised
+ at the same time. Prepare to undo. */
+ if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW)) && !(excepts & FE_INEXACT))
+ INTERNAL_SYSCALL (osf_getsysinfo, err, 2, GSI_IEEE_FP_CONTROL, &t);
+
+ /* Overflow implemented with FLT_MAX + FLT_MAX -> Inf. */
+ if (excepts & FE_OVERFLOW)
+ __asm__ __volatile__ ("adds/sui %1,%1,%0; trapb"
+ : "=&f"(d) : "f"(FLT_MAX));
+
+ /* Underflow implemented with FLT_MIN * FLT_MIN -> 0. */
+ if (excepts & FE_UNDERFLOW)
+ __asm__ __volatile__ ("muls/sui %1,%1,%0; trapb"
+ : "=&f"(d) : "f"(FLT_MIN));
+
+ /* Inexact implemented with (long)0.5 -> 0. */
+ if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)) == FE_INEXACT)
+ __asm__ __volatile__ ("cvttq/svi %1,%0; trapb" : "=&f"(d) : "f"(0.5f));
+
+ /* If we raised inexact when not asked, and inexact was not previously
+ raised, then clear that exception. */
+ if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW))
+ && !((excepts | t) & FE_INEXACT))
+ {
+ t |= excepts & SWCR_STATUS_MASK;
+ INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_FP_CONTROL, &t);
+ }
+#endif /* !__ASSUME_IEEE_RAISE_EXCEPTION */
+
+ return 0;
+}
+
+#include <shlib-compat.h>
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
+strong_alias (__feraiseexcept, __old_feraiseexcept)
+compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
+#endif
+
+libm_hidden_ver (__feraiseexcept, feraiseexcept)
+versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
projects / thirdparty / glibc.git / commitdiff
