Merge pull request #156 from p12nGH/noncontiguous_harts

[riscv-isa-sim.git] / softfloat / i32_to_f64.c

diff --git a/softfloat/i32_to_f64.c b/softfloat/i32_to_f64.c
old mode 100755 (executable)
new mode 100644 (file)
index d42cbe8..d3901eb
--- a/softfloat/i32_to_f64.c
+++ b/softfloat/i32_to_f64.c
@@ -1,31 +1,65 @@
-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "primitives.h"\r
-#include "internals.h"\r
-#include "softfloat.h"\r
-\r
-float64_t i32_to_f64( int_fast32_t a )\r
-{\r
-    uint_fast64_t uiZ;\r
-    bool sign;\r
-    uint_fast32_t absA;\r
-    int shiftCount;\r
-    union ui64_f64 uZ;\r
-\r
-    if ( ! a ) {\r
-        uiZ = 0;\r
-    } else {\r
-        sign = ( a < 0 );\r
-        absA = sign ? - a : a;\r
-        shiftCount = softfloat_countLeadingZeros32( absA ) + 21;\r
-        uiZ =\r
-            packToF64UI(\r
-                sign, 0x432 - shiftCount, (uint_fast64_t) absA<<shiftCount );\r
-    }\r
-    uZ.ui = uiZ;\r
-    return uZ.f;\r
-\r
-}\r
-\r
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3d, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014, 2015, 2016 The Regents of the University of
+California.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions, and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions, and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ 3. Neither the name of the University nor the names of its contributors may
+    be used to endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
+DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+=============================================================================*/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+float64_t i32_to_f64( int32_t a )
+{
+    uint_fast64_t uiZ;
+    bool sign;
+    uint_fast32_t absA;
+    int_fast8_t shiftDist;
+    union ui64_f64 uZ;
+
+    if ( ! a ) {
+        uiZ = 0;
+    } else {
+        sign = (a < 0);
+        absA = sign ? -(uint_fast32_t) a : (uint_fast32_t) a;
+        shiftDist = softfloat_countLeadingZeros32( absA ) + 21;
+        uiZ =
+            packToF64UI(
+                sign, 0x432 - shiftDist, (uint_fast64_t) absA<<shiftDist );
+    }
+    uZ.ui = uiZ;
+    return uZ.f;
+
+}
+