1 files changed, 52 insertions, 0 deletions
diff --git a/sysdeps/powerpc/q_lltoq.c b/sysdeps/powerpc/q_lltoq.c
new file mode 100644
index 0000000000..6222eff9fc
--- /dev/null
+++ b/sysdeps/powerpc/q_lltoq.c
@@ -0,0 +1,52 @@
+/* 64-bit fixed point signed integer to 128-bit floating point.
+   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 <quad_float.h>
+
+/* long double _q_ulltoq(long long a);
+   Convert 'a' to long double.
+   */
+
+void
+__q_lltoq(unsigned int result[4], long long a)
+{
+  unsigned rx;
+  int cs, css;
+
+  /* Calculate absolute value of 'a'.  */
+  unsigned long long ua = (a  ^  a >> 63) - (a >> 63);
+
+  /* Normalize.  */
+  cs = cntlzd(a);
+  ua <<= cs+1;
+
+  /* Calculate the exponent, in 4 easy instructions.  */
+  css = 63-cs;
+  rx = 16383+css << 16  &  ~css;
+
+  /* Copy the sign bit from 'a'.  */
+  asm ("rlwimi %0,%1,0,0,0": "=r"(rx) : "r"(a >> 32), "0"(rx));
+
+  /* Put it all together.  */
+  result[3] = 0;
+  asm ("rlwimi %0,%1,16,16,31": "=r"(result[0]) : "r"(ua >> 32), "0"(rx));
+  ua <<= 16;
+  result[2] = ua;
+  result[1] = ua >> 32;
+}