1 files changed, 125 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/epiphany/udivsi3-float.c b/gcc-4.9/libgcc/config/epiphany/udivsi3-float.c
new file mode 100644
index 000000000..9d1b25251
--- /dev/null
+++ b/gcc-4.9/libgcc/config/epiphany/udivsi3-float.c
@@ -0,0 +1,125 @@
+/* Generic unsigned 32 bit division implementation.
+   Copyright (C) 2009-2014 Free Software Foundation, Inc.
+   Contributed by Embecosm on behalf of Adapteva, Inc.
+
+This file is part of GCC.
+
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3, or (at your option) any
+later version.
+
+This file 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
+General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+typedef union { unsigned int i; float f; } fu;
+
+unsigned int __udivsi3 (unsigned int a, unsigned int b);
+
+unsigned int
+__udivsi3 (unsigned int a, unsigned int b)
+{
+  unsigned int d, t, s0, s1, s2, r0, r1;
+  fu u0, u1, u2,  u1b, u2b;
+
+  if (b > a)
+    return 0;
+  if ((int) b < 0)
+    return 1;
+
+  /* Assuming B is nonzero, compute S0 such that 0 <= S0,
+     (B << S0+1) does not overflow,
+     A < 4.01 * (B << S0), with S0 chosen as small as possible
+     without taking to much time calculating.  */
+#ifdef CONVERT_UNSIGNED
+  u0.f = a;
+  u1.f = b;
+#else /* !CONVERT_UNSIGNED */
+  u0.f = (int) a;
+  u1.f = (int) b;
+#ifdef CONCISE
+  if (a < 0)
+    u0.i = (a >> 8) - 0x00800000 + 0x3f800000 + (31 << 23);
+#else /* To use flag seting / cmove, this can be written as:  */
+ {
+  unsigned c = 0xff800000 - 0x4f000000;
+  t = (int)a >> 8;
+  if (t >= c)
+    u0.i = (t - c);
+ }
+#endif
+#endif /* !CONVERT_UNSIGNED */
+  s0 = u0.i + 1 /* Compensate for rounding errors.  */
+	    - 0x00800000 /* adjust by one */ ;
+  s0 = s0 - u1.i;
+  s0 = (int)s0 >= 0 ? s0 : 0;
+  s0 >>= 23;
+
+  b <<= s0;
+  r1 = 0;
+
+  r0 = 1 << s0;
+  a = ((t=a) - b);
+  if (a <= t)
+    {
+      r1 += r0;
+      a = ((t=a) - b);
+      if (a <= t)
+	do {
+	  r1 += r0;
+	  a = ((t=a) - b);
+	} while (a <= t);
+    }
+  a += b;
+  d = b - 1;
+
+#define STEP(n) case n: a += a; t = a - d; if (t <= a) a = t;
+  switch (s0)
+    {
+    STEP (31)
+    STEP (30)
+    STEP (29)
+    STEP (28)
+    STEP (27)
+    STEP (26)
+    STEP (25)
+    STEP (24)
+    STEP (23)
+    STEP (22)
+    STEP (21)
+    STEP (20)
+    STEP (19)
+    STEP (18)
+    STEP (17)
+    STEP (16)
+    STEP (15)
+    STEP (14)
+    STEP (13)
+    STEP (12)
+    STEP (11)
+    STEP (10)
+    STEP (9)
+    STEP (8)
+    STEP (7)
+    STEP (6)
+    STEP (5)
+    STEP (4)
+    STEP (3)
+    STEP (2)
+    STEP (1)
+    case 0: ;
+    }
+  r0 = r1 | (r0-1 & a);
+  return r0;
+}