isnan implementation for Power6x 64-bit

diff --git a/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S b/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S
new file mode 100644 (file)
index 0000000..47dd49a
--- /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
+