Upgrade to SoftFloat 3e

1 files changed, 113 insertions, 0 deletions

diff --git a/softfloat/f128_to_i64_r_minMag.c b/softfloat/f128_to_i64_r_minMag.c
new file mode 100644
index 0000000..65cfa67
--- /dev/null
+++ b/softfloat/f128_to_i64_r_minMag.c
@@ -0,0 +1,113 @@
+
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+int_fast64_t f128_to_i64_r_minMag( float128_t a, bool exact )
+{
+    union ui128_f128 uA;
+    uint_fast64_t uiA64, uiA0;
+    bool sign;
+    int_fast32_t exp;
+    uint_fast64_t sig64, sig0;
+    int_fast32_t shiftDist;
+    int_fast8_t negShiftDist;
+    int_fast64_t absZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA64 = uA.ui.v64;
+    uiA0  = uA.ui.v0;
+    sign  = signF128UI64( uiA64 );
+    exp   = expF128UI64( uiA64 );
+    sig64 = fracF128UI64( uiA64 );
+    sig0  = uiA0;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    shiftDist = 0x402F - exp;
+    if ( shiftDist < 0 ) {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        if ( shiftDist < -14 ) {
+            if (
+                   (uiA64 == UINT64_C( 0xC03E000000000000 ))
+                && (sig0 < UINT64_C( 0x0002000000000000 ))
+            ) {
+                if ( exact && sig0 ) {
+                    softfloat_raiseFlags( softfloat_flag_inexact );
+                }
+                return -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
+            }
+            softfloat_raiseFlags( softfloat_flag_invalid );
+            return
+                (exp == 0x7FFF) && (sig64 | sig0) ? i64_fromNaN
+                    : sign ? i64_fromNegOverflow : i64_fromPosOverflow;
+        }
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        sig64 |= UINT64_C( 0x0001000000000000 );
+        negShiftDist = -shiftDist;
+        absZ = sig64<<negShiftDist | sig0>>(shiftDist & 63);
+        if ( exact && (uint64_t) (sig0<<negShiftDist) ) {
+            softfloat_raiseFlags( softfloat_flag_inexact );
+        }
+    } else {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        if ( 49 <= shiftDist ) {
+            if ( exact && (exp | sig64 | sig0) ) {
+                softfloat_raiseFlags( softfloat_flag_inexact );
+            }
+            return 0;
+        }
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        sig64 |= UINT64_C( 0x0001000000000000 );
+        absZ = sig64>>shiftDist;
+        if ( exact && (sig0 || (absZ<<shiftDist != sig64)) ) {
+            softfloat_raiseFlags( softfloat_flag_inexact );
+        }
+    }
+    return sign ? -absZ : absZ;
+
+}
+