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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-03-31 13:28:15 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-03-31 13:28:15 +0000
commite7bcf43b6440ac9fc61a0eef5591393810daafb5 (patch)
treeb72c3fb15e030b47b2eb02d13169b4548382e855 /libm/powerpc/e500/fpu/fenv_libc.h
parent7a40ba19c86e4d2fc7e35f14a0e629ee843b96a9 (diff)
From Steve Papacharalambous:
Add math support for PowerPC e500.
Diffstat (limited to 'libm/powerpc/e500/fpu/fenv_libc.h')
-rw-r--r--libm/powerpc/e500/fpu/fenv_libc.h77
1 files changed, 77 insertions, 0 deletions
diff --git a/libm/powerpc/e500/fpu/fenv_libc.h b/libm/powerpc/e500/fpu/fenv_libc.h
new file mode 100644
index 000000000..cd003eab7
--- /dev/null
+++ b/libm/powerpc/e500/fpu/fenv_libc.h
@@ -0,0 +1,77 @@
+/* Internal libc stuff for floating point environment routines.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+ Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004
+ 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. */
+
+#ifndef _FENV_LIBC_H
+#define _FENV_LIBC_H 1
+
+#include <fenv.h>
+
+extern int __feraiseexcept_internal (int __excepts);
+
+/* Equivalent to fegetenv, but returns a fenv_t instead of taking a
+ pointer. */
+#define fegetenv_register() \
+ ({ unsigned fscr; asm volatile ("mfspefscr %0" : "=r" (fscr)); fscr; })
+
+/* Equivalent to fesetenv, but takes a fenv_t instead of a pointer. */
+#define fesetenv_register(fscr) \
+ ({ asm volatile ("mtspefscr %0" : : "r" (fscr)); })
+
+typedef union
+{
+ fenv_t fenv;
+ unsigned int l[2];
+} fenv_union_t;
+
+/* Definitions of all the SPEFSCR bit numbers. */
+enum {
+ SPEFSCR_SOVH = 0x80000000,
+ SPEFSCR_OVH = 0x40000000,
+ SPEFSCR_FGH = 0x20000000,
+ SPEFSCR_FXH = 0x10000000,
+ SPEFSCR_FINVH = 0x08000000,
+ SPEFSCR_FDBZH = 0x04000000,
+ SPEFSCR_FUNFH = 0x02000000,
+ SPEFSCR_FOVFH = 0x01000000,
+ /* 2 unused bits. */
+ SPEFSCR_FINXS = 0x00200000,
+ SPEFSCR_FINVS = 0x00100000,
+ SPEFSCR_FDBZS = 0x00080000,
+ SPEFSCR_FUNFS = 0x00040000,
+ SPEFSCR_FOVFS = 0x00020000,
+ SPEFSCR_MODE = 0x00010000,
+ SPEFSCR_SOV = 0x00008000,
+ SPEFSCR_OV = 0x00004000,
+ SPEFSCR_FG = 0x00002000,
+ SPEFSCR_FX = 0x00001000,
+ SPEFSCR_FINV = 0x00000800,
+ SPEFSCR_FDBZ = 0x00000400,
+ SPEFSCR_FUNF = 0x00000200,
+ SPEFSCR_FOVF = 0x00000100,
+ /* 1 unused bit. */
+ SPEFSCR_FINXE = 0x00000040,
+ SPEFSCR_FINVE = 0x00000020,
+ SPEFSCR_FDBZE = 0x00000010,
+ SPEFSCR_FUNFE = 0x00000008,
+ SPEFSCR_FOVFE = 0x00000004,
+ SPEFSCR_FRMC = 0x00000003
+};
+
+#endif /* fenv_libc.h */