Upgrade to SoftFloat 3e

1 files changed, 72 insertions, 0 deletions

diff --git a/softfloat/i64_to_f128.c b/softfloat/i64_to_f128.c
new file mode 100644
index 0000000..a2b6dea
--- /dev/null
+++ b/softfloat/i64_to_f128.c
@@ -0,0 +1,72 @@
+
+/*============================================================================
+
+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 "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+float128_t i64_to_f128( int64_t a )
+{
+    uint_fast64_t uiZ64, uiZ0;
+    bool sign;
+    uint_fast64_t absA;
+    int_fast8_t shiftDist;
+    struct uint128 zSig;
+    union ui128_f128 uZ;
+
+    if ( ! a ) {
+        uiZ64 = 0;
+        uiZ0  = 0;
+    } else {
+        sign = (a < 0);
+        absA = sign ? -(uint_fast64_t) a : (uint_fast64_t) a;
+        shiftDist = softfloat_countLeadingZeros64( absA ) + 49;
+        if ( 64 <= shiftDist ) {
+            zSig.v64 = absA<<(shiftDist - 64);
+            zSig.v0  = 0;
+        } else {
+            zSig = softfloat_shortShiftLeft128( 0, absA, shiftDist );
+        }
+        uiZ64 = packToF128UI64( sign, 0x406E - shiftDist, zSig.v64 );
+        uiZ0  = zSig.v0;
+    }
+    uZ.ui.v64 = uiZ64;
+    uZ.ui.v0  = uiZ0;
+    return uZ.f;
+
+}
+