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authorUlrich Drepper <drepper@redhat.com>2008-04-10 14:15:27 +0000
committerUlrich Drepper <drepper@redhat.com>2008-04-10 14:15:27 +0000
commit1ee82cfa183ca87f5820174b59bc774100f177f3 (patch)
treee94054ec3819b787d4c0b659dc4fd553f53105b7 /sysdeps
parent117df5d9efd27f92fd139963f1a6033e59f3f6a9 (diff)
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isnan implementation for ppc32.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/powerpc/powerpc32/fpu/s_isnan.S56
1 files changed, 56 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_isnan.S b/sysdeps/powerpc/powerpc32/fpu/s_isnan.S
new file mode 100644
index 0000000..6e3f396
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/fpu/s_isnan.S
@@ -0,0 +1,56 @@
+/* isnan(). PowerPC32 version.
+ Copyright (C) 2008 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 <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* int __isnan(x) */
+ .machine power4
+EALIGN (__isnan, 4, 0)
+ mffs fp0
+ mtfsb0 4*cr6+lt /* reset_fpscr_bit (FPSCR_VE) */
+ fcmpu cr7,fp1,fp1
+ mtfsf 255,fp0
+ li r3,0
+ beqlr+ cr7 /* (x == x) then not a NAN */
+ li r3,1 /* else must be a NAN */
+ blr
+ END (__isnan)
+
+hidden_def (__isnan)
+weak_alias (__isnan, isnan)
+
+/* It turns out that the 'double' version will also always work for
+ single-precision. */
+strong_alias (__isnan, __isnanf)
+hidden_def (__isnanf)
+weak_alias (__isnanf, isnanf)
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__isnan, __isnanl)
+weak_alias (__isnan, isnanl)
+#endif
+
+#ifndef IS_IN_libm
+# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
+compat_symbol (libc, isnan, isnanl, GLIBC_2_0);
+# endif
+#endif
+