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[riscv-isa-sim.git] / softfloat / s_normRoundPackToF64.c

diff --git a/softfloat/s_normRoundPackToF64.c b/softfloat/s_normRoundPackToF64.c
old mode 100755 (executable)
new mode 100644 (file)
index 64dced4..7f5d6a2
--- a/softfloat/s_normRoundPackToF64.c
+++ b/softfloat/s_normRoundPackToF64.c
@@ -1,24 +1,58 @@
-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "primitives.h"\r
-#include "internals.h"\r
-\r
-float64_t\r
- softfloat_normRoundPackToF64( bool sign, int_fast16_t exp, uint_fast64_t sig )\r
-{\r
-    int shiftCount;\r
-    union ui64_f64 uZ;\r
-\r
-    shiftCount = softfloat_countLeadingZeros64( sig ) - 1;\r
-    exp -= shiftCount;\r
-    if ( ( 10 <= shiftCount ) && ( (uint16_t) exp < 0x7FD ) ) {\r
-        uZ.ui = packToF64UI( sign, sig ? exp : 0, sig<<( shiftCount - 10 ) );\r
-        return uZ.f;\r
-    } else {\r
-        return softfloat_roundPackToF64( sign, exp, sig<<shiftCount );\r
-    }\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"
+
+float64_t
+ softfloat_normRoundPackToF64( bool sign, int_fast16_t exp, uint_fast64_t sig )
+{
+    int_fast8_t shiftDist;
+    union ui64_f64 uZ;
+
+    shiftDist = softfloat_countLeadingZeros64( sig ) - 1;
+    exp -= shiftDist;
+    if ( (10 <= shiftDist) && ((unsigned int) exp < 0x7FD) ) {
+        uZ.ui = packToF64UI( sign, sig ? exp : 0, sig<<(shiftDist - 10) );
+        return uZ.f;
+    } else {
+        return softfloat_roundPackToF64( sign, exp, sig<<shiftDist );
+    }
+
+}
+