Upgrade to softfloat3e.

This should solve licensing problems as well.

src/cpu/softfloat3e/extF80_to_ui64_r_minMag.cc

@@ -0,0 +1,87 @@
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3e, 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 <stdint.h>
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+uint64_t extF80_to_ui64_r_minMag(extFloat80_t a, bool exact, struct softfloat_status_t *status)
+{
+    uint16_t uiA64;
+    int32_t exp;
+    uint64_t sig;
+    int32_t shiftDist;
+    bool sign;
+    uint64_t z;
+
+    // handle unsupported extended double-precision floating encodings
+    if (extF80_isUnsupported(a)) {
+        softfloat_raiseFlags(status, softfloat_flag_invalid);
+        return ui64_fromNaN;
+    }
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiA64 = a.signExp;
+    exp = expExtF80UI64(uiA64);
+    sig = a.signif;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    shiftDist = 0x403E - exp;
+    if (64 <= shiftDist) {
+        if (exact && (exp | sig)) {
+            softfloat_raiseFlags(status, softfloat_flag_inexact);
+        }
+        return 0;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sign = signExtF80UI64(uiA64);
+    if (sign || (shiftDist < 0)) {
+        softfloat_raiseFlags(status, softfloat_flag_invalid);
+        return
+            (exp == 0x7FFF) && (sig & UINT64_C(0x7FFFFFFFFFFFFFFF))
+                ? ui64_fromNaN
+                : sign ? ui64_fromNegOverflow : ui64_fromPosOverflow;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    z = sig>>shiftDist;
+    if (exact && (z<<shiftDist != sig)) {
+        softfloat_raiseFlags(status, softfloat_flag_inexact);
+    }
+    return z;
+}