1 files changed, 96 insertions, 44 deletions
diff --git a/softfloat/f32_to_ui64.c b/softfloat/f32_to_ui64.c
index a8aaa02..16e608a 100755..100644
--- a/softfloat/f32_to_ui64.c
+++ b/softfloat/f32_to_ui64.c
@@ -1,44 +1,96 @@
-// See LICENSE.SoftFloat for license details.
-
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "platform.h"
-#include "primitives.h"
-#include "internals.h"
-#include "softfloat.h"
-
-uint_fast64_t f32_to_ui64( float32_t a, int_fast8_t roundingMode, bool exact )
-{
-    union ui32_f32 uA;
-    uint_fast32_t uiA;
-    bool sign;
-    int_fast16_t exp;
-    uint_fast32_t sig;
-    int_fast16_t shiftCount;
-    uint_fast64_t sig64, extra;
-    struct uint64_extra sig64Extra;
-
-    uA.f = a;
-    uiA = uA.ui;
-    sign = signF32UI( uiA );
-    exp = expF32UI( uiA );
-    sig = fracF32UI( uiA );
-    shiftCount = 0xBE - exp;
-    if ( shiftCount < 0 ) {
-        softfloat_raiseFlags( softfloat_flag_invalid );
-        return UINT64_C( 0xFFFFFFFFFFFFFFFF );
-    }
-    if ( exp ) sig |= 0x00800000;
-    sig64 = (uint_fast64_t) sig<<40;
-    extra = 0;
-    if ( shiftCount ) {
-        sig64Extra = softfloat_shift64ExtraRightJam( sig64, 0, shiftCount );
-        sig64 = sig64Extra.v;
-        extra = sig64Extra.extra;
-    }
-    return
-        softfloat_roundPackToUI64( sign, sig64, extra, roundingMode, exact );
-
-}
-
+
+/*============================================================================
+
+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"
+
+uint_fast64_t f32_to_ui64( float32_t a, uint_fast8_t roundingMode, bool exact )
+{
+    union ui32_f32 uA;
+    uint_fast32_t uiA;
+    bool sign;
+    int_fast16_t exp;
+    uint_fast32_t sig;
+    int_fast16_t shiftDist;
+#ifdef SOFTFLOAT_FAST_INT64
+    uint_fast64_t sig64, extra;
+    struct uint64_extra sig64Extra;
+#else
+    uint32_t extSig[3];
+#endif
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA = uA.ui;
+    sign = signF32UI( uiA );
+    exp  = expF32UI( uiA );
+    sig  = fracF32UI( uiA );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    shiftDist = 0xBE - exp;
+    if ( shiftDist < 0 ) {
+        softfloat_raiseFlags( softfloat_flag_invalid );
+        return
+            (exp == 0xFF) && sig ? ui64_fromNaN
+                : sign ? ui64_fromNegOverflow : ui64_fromPosOverflow;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( exp ) sig |= 0x00800000;
+#ifdef SOFTFLOAT_FAST_INT64
+    sig64 = (uint_fast64_t) sig<<40;
+    extra = 0;
+    if ( shiftDist ) {
+        sig64Extra = softfloat_shiftRightJam64Extra( sig64, 0, shiftDist );
+        sig64 = sig64Extra.v;
+        extra = sig64Extra.extra;
+    }
+    return softfloat_roundToUI64( sign, sig64, extra, roundingMode, exact );
+#else
+    extSig[indexWord( 3, 2 )] = sig<<8;
+    extSig[indexWord( 3, 1 )] = 0;
+    extSig[indexWord( 3, 0 )] = 0;
+    if ( shiftDist ) softfloat_shiftRightJam96M( extSig, shiftDist, extSig );
+    return softfloat_roundMToUI64( sign, extSig, roundingMode, exact );
+#endif
+
+}
+