From ca9211ecdede9bdedb812b2243a4abdb8dacd1b9 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 7 Jan 2015 19:55:37 +0000
Subject: Import compiler-rt trunk r224034.

https://llvm.org/svn/llvm-project/compiler-rt/trunk@224034
---
 lib/builtins/fixunsdfsi.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 lib/builtins/fixunsdfsi.c

(limited to 'lib/builtins/fixunsdfsi.c')

diff --git a/lib/builtins/fixunsdfsi.c b/lib/builtins/fixunsdfsi.c
new file mode 100644
index 0000000000000..c6a3c755e90f5
--- /dev/null
+++ b/lib/builtins/fixunsdfsi.c
@@ -0,0 +1,44 @@
+/* ===-- fixunsdfsi.c - Implement __fixunsdfsi -----------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __fixunsdfsi for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+/* Returns: convert a to a unsigned int, rounding toward zero.
+ *          Negative values all become zero.
+ */
+
+/* Assumption: double is a IEEE 64 bit floating point type 
+ *             su_int is a 32 bit integral type
+ *             value in double is representable in su_int or is negative 
+ *                 (no range checking performed)
+ */
+
+/* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */
+
+ARM_EABI_FNALIAS(d2uiz, fixunsdfsi)
+
+COMPILER_RT_ABI su_int
+__fixunsdfsi(double a)
+{
+    double_bits fb;
+    fb.f = a;
+    int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
+    if (e < 0 || (fb.u.s.high & 0x80000000))
+        return 0;
+    return (
+                0x80000000u                      |
+                ((fb.u.s.high & 0x000FFFFF) << 11) |
+                (fb.u.s.low >> 21)
+           ) >> (31 - e);
+}
-- 
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