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Diffstat (limited to 'sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c')
-rw-r--r--sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c b/sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c
new file mode 100644
index 0000000000..4394ddc7cb
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/spe-raise.c
@@ -0,0 +1,53 @@
+/* Raise given exceptions, given the SPEFSCR bits for those exceptions.
+ Copyright (C) 1997-2013 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <fenv_libc.h>
+
+int
+__FERAISEEXCEPT_INTERNAL (int excepts)
+{
+ unsigned long f;
+
+ f = fegetenv_register ();
+ f |= (excepts & SPEFSCR_ALL_EXCEPT);
+ fesetenv_register (f);
+
+ /* Force the operations that cause the exceptions. */
+ if ((SPEFSCR_FINVS & excepts) != 0)
+ /* 0 / 0 */
+ asm volatile ("efsdiv %0,%0,%1" : : "r" (0), "r" (0));
+
+ if ((SPEFSCR_FDBZS & excepts) != 0)
+ /* 1.0 / 0.0 */
+ asm volatile ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0));
+
+ if ((SPEFSCR_FOVFS & excepts) != 0)
+ /* Largest normalized number plus itself. */
+ asm volatile ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff));
+
+ if ((SPEFSCR_FUNFS & excepts) != 0)
+ /* Smallest normalized number times itself. */
+ asm volatile ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000));
+
+ if ((SPEFSCR_FINXS & excepts) != 0)
+ /* Smallest normalized minus 1.0 raises the inexact flag. */
+ asm volatile ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F));
+
+ /* Success. */
+ return 0;
+}