aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2008-04-10 05:59:52 +0000
committerUlrich Drepper <drepper@redhat.com>2008-04-10 05:59:52 +0000
commit3e852ba889e41b8f7eb4d9a1b0abca590dbbab81 (patch)
treee33eb86af566638f0b691064988085135038b9c3
parent3b32d8a25908459411ee77761ccf57ac3f8b4343 (diff)
downloadglibc-3e852ba889e41b8f7eb4d9a1b0abca590dbbab81.tar
glibc-3e852ba889e41b8f7eb4d9a1b0abca590dbbab81.tar.gz
glibc-3e852ba889e41b8f7eb4d9a1b0abca590dbbab81.tar.bz2
glibc-3e852ba889e41b8f7eb4d9a1b0abca590dbbab81.zip
isnan implementation for Power6x 64-bit
-rw-r--r--sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S59
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S b/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S
new file mode 100644
index 0000000000..47dd49a751
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S
@@ -0,0 +1,59 @@
+/* isnan(). PowerPC64 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 power6
+EALIGN (__isnan, 4, 0)
+ CALL_MCOUNT 0
+ mftgpr r4,fp1 /* copy FPR to GPR */
+ lis r0,0x7ff0
+ ori r1,r1,0
+ clrldi r4,r4,1 /* x = fabs(x) */
+ sldi r0,r0,32 /* const long r0 0x7ff00000 00000000 */
+ cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */
+ li r3,0 /* then return 0 */
+ blelr+ cr7
+ li r3,1 /* else return 1 */
+ 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
+