1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/powerpc/q_feq.c b/sysdeps/powerpc/q_feq.c
new file mode 100644
index 0000000000..3f5512a4a0
--- /dev/null
+++ b/sysdeps/powerpc/q_feq.c
@@ -0,0 +1,65 @@
+/* 128-bit floating point unordered equality.
+   Copyright (C) 1997 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv_libc.h>
+
+/* int _q_feq(const long double *a, const long double *b);
+   Returns nonzero if a==b, 0 otherwise.
+
+   Special cases:
+   NaNs are never equal to anything;
+   -0 == +0;
+   If either argument is a SNaN, we set FPSCR_VXSNAN to cause an
+   'invalid operation' exception.
+   */
+
+int
+__q_feq(const unsigned a[4], const unsigned b[4])
+{
+  unsigned a0, b0;
+
+  a0 = a[0]; b0 = b[0];
+
+  if ((a0 >> 16  &  0x7fff) != 0x7fff &&
+      (b0 >> 16  &  0x7fff) != 0x7fff)
+    {
+      unsigned a3,b3,a2,b2,a1,b1;
+      unsigned z, result;
+
+      a3 = a[3]; b3 = b[3]; a2 = a[2];
+      b2 = b[2]; a1 = a[1]; b1 = b[1];
+      result = ~(a3 ^ b3);
+      result &= ~(a2 ^ b2);
+      result &= ~(a1 ^ b1);
+      z = a3 | a2;
+      z |= a1;
+      z = (z >> 1 | z | a0) & 0x7fffffff;
+      /* 'z' is 0 iff a==0.0, otherwise between 1 and 0x7fffffff */
+      return (result & ~(a0^b0 & ~(-z & 0x80000000)))+1;
+    }
+  else
+    {
+      /* Deal with SNaNs */
+      if (((a0|b0) & 0x8000) == 0)
+	{
+	  set_fpscr_bit(FPSCR_VXSNAN);
+	}
+      return 0;
+    }
+}