Added the ability to specify the result values delivered when conversions

from floating-point to an integer format raise an invalid exception.
For the provided specializations (8086 and RISC-V), changed the result
of converting a negative floating-point value to an unsigned integer
format to now be zero.  (Also renamed `shiftCount' inside functions to
`shiftDist'.)

1 files changed, 9 insertions, 4 deletions

diff --git a/source/s_roundPackMToUI64.c b/source/s_roundPackMToUI64.c
index 0a57437..1a64fdf 100644
--- a/source/s_roundPackMToUI64.c
+++ b/source/s_roundPackMToUI64.c
@@ -2,10 +2,10 @@
 /*============================================================================
 
 This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
-Package, Release 3a, by John R. Hauser.
+Package, Release 3a+, by John R. Hauser.
 
-Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
-All rights reserved.
+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:
@@ -38,6 +38,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <stdint.h>
 #include "platform.h"
 #include "internals.h"
+#include "specialize.h"
 #include "softfloat.h"
 
 uint_fast64_t
@@ -49,6 +50,8 @@ uint_fast64_t
     bool doIncrement;
     uint64_t sig;
 
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
     roundNearEven = (roundingMode == softfloat_round_near_even);
     sigExtra = extSigPtr[indexWordLo( 3 )];
     doIncrement = (0x80000000 <= sigExtra);
@@ -71,9 +74,11 @@ uint_fast64_t
         softfloat_exceptionFlags |= softfloat_flag_inexact;
     }
     return sig;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
  invalid:
     softfloat_raiseFlags( softfloat_flag_invalid );
-    return UINT64_C( 0xFFFFFFFFFFFFFFFF );
+    return sign ? ui64_fromNegOverflow : ui64_fromPosOverflow;
 
 }