1 files changed, 101 insertions, 0 deletions
diff --git a/softfloat/s_roundToI64.c b/softfloat/s_roundToI64.c
new file mode 100644
index 0000000..1471a7e
--- /dev/null
+++ b/softfloat/s_roundToI64.c
@@ -0,0 +1,101 @@
+
+/*============================================================================
+
+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, 2017 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 "specialize.h"
+#include "softfloat.h"
+
+int_fast64_t
+ softfloat_roundToI64(
+     bool sign,
+     uint_fast64_t sig,
+     uint_fast64_t sigExtra,
+     uint_fast8_t roundingMode,
+     bool exact
+ )
+{
+    union { uint64_t ui; int64_t i; } uZ;
+    int_fast64_t z;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (
+        (roundingMode == softfloat_round_near_maxMag)
+            || (roundingMode == softfloat_round_near_even)
+    ) {
+        if ( UINT64_C( 0x8000000000000000 ) <= sigExtra ) goto increment;
+    } else {
+        if (
+            sigExtra
+                && (sign
+                        ? (roundingMode == softfloat_round_min)
+#ifdef SOFTFLOAT_ROUND_ODD
+                              || (roundingMode == softfloat_round_odd)
+#endif
+                        : (roundingMode == softfloat_round_max))
+        ) {
+ increment:
+            ++sig;
+            if ( !sig ) goto invalid;
+            if (
+                (sigExtra == UINT64_C( 0x8000000000000000 ))
+                    && (roundingMode == softfloat_round_near_even)
+            ) {
+                sig &= ~(uint_fast64_t) 1;
+            }
+        }
+    }
+    uZ.ui = sign ? -sig : sig;
+    z = uZ.i;
+    if ( z && ((z < 0) ^ sign) ) goto invalid;
+    if ( sigExtra ) {
+#ifdef SOFTFLOAT_ROUND_ODD
+        if ( roundingMode == softfloat_round_odd ) z |= 1;
+#endif
+        if ( exact ) softfloat_raiseFlags( softfloat_flag_inexact );
+    }
+    return z;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ invalid:
+    softfloat_raiseFlags( softfloat_flag_invalid );
+    return sign ? i64_fromNegOverflow : i64_fromPosOverflow;
+
+}
+