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/fixsfdi.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 lib/builtins/fixsfdi.c

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

diff --git a/lib/builtins/fixsfdi.c b/lib/builtins/fixsfdi.c
new file mode 100644
index 0000000000000..4f6cfdd7a5c62
--- /dev/null
+++ b/lib/builtins/fixsfdi.c
@@ -0,0 +1,43 @@
+/* ===-- fixsfdi.c - Implement __fixsfdi -----------------------------------===
+ *
+ *                    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 __fixsfdi for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+/* Returns: convert a to a signed long long, rounding toward zero. */
+
+/* Assumption: float is a IEEE 32 bit floating point type 
+ *             su_int is a 32 bit integral type
+ *             value in float is representable in di_int (no range checking performed)
+ */
+
+/* seee eeee emmm mmmm mmmm mmmm mmmm mmmm */
+
+ARM_EABI_FNALIAS(f2lz, fixsfdi)
+
+COMPILER_RT_ABI di_int
+__fixsfdi(float a)
+{
+    float_bits fb;
+    fb.f = a;
+    int e = ((fb.u & 0x7F800000) >> 23) - 127;
+    if (e < 0)
+        return 0;
+    di_int s = (si_int)(fb.u & 0x80000000) >> 31;
+    di_int r = (fb.u & 0x007FFFFF) | 0x00800000;
+    if (e > 23)
+        r <<= (e - 23);
+    else
+        r >>= (23 - e);
+    return (r ^ s) - s;
+}
-- 
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