1 files changed, 174 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/f128_roundToInt.c b/src/libs/softfloat-3e/source/f128_roundToInt.c
new file mode 100644
index 00000000..f643296b
--- /dev/null
+++ b/src/libs/softfloat-3e/source/f128_roundToInt.c
@@ -0,0 +1,174 @@
+
+/*============================================================================
+
+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, 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"
+#include <iprt/cdefs.h> /* VBox: for RT_FALL_THROUGH */
+
+float128_t
+ f128_roundToInt( float128_t a, uint_fast8_t roundingMode, bool exact SOFTFLOAT_STATE_DECL_COMMA )
+{
+    union ui128_f128 uA;
+    uint_fast64_t uiA64, uiA0;
+    int_fast32_t exp;
+    struct uint128 uiZ;
+    uint_fast64_t lastBitMask0, roundBitsMask;
+    bool roundNearEven;
+    uint_fast64_t lastBitMask64;
+    union ui128_f128 uZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA64 = uA.ui.v64;
+    uiA0  = uA.ui.v0;
+    exp = expF128UI64( uiA64 );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( 0x402F <= exp ) {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        if ( 0x406F <= exp ) {
+            if ( (exp == 0x7FFF) && (fracF128UI64( uiA64 ) | uiA0) ) {
+                uiZ = softfloat_propagateNaNF128UI( uiA64, uiA0, 0, 0 SOFTFLOAT_STATE_ARG_COMMA );
+                goto uiZ;
+            }
+            return a;
+        }
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        lastBitMask0 = (uint_fast64_t) 2<<(0x406E - exp);
+        roundBitsMask = lastBitMask0 - 1;
+        uiZ.v64 = uiA64;
+        uiZ.v0  = uiA0;
+        roundNearEven = (roundingMode == softfloat_round_near_even);
+        if ( roundNearEven || (roundingMode == softfloat_round_near_maxMag) ) {
+            if ( exp == 0x402F ) {
+                if ( UINT64_C( 0x8000000000000000 ) <= uiZ.v0 ) {
+                    ++uiZ.v64;
+                    if (
+                        roundNearEven
+                            && (uiZ.v0 == UINT64_C( 0x8000000000000000 ))
+                    ) {
+                        uiZ.v64 &= ~1;
+                    }
+                }
+            } else {
+                uiZ = softfloat_add128( uiZ.v64, uiZ.v0, 0, lastBitMask0>>1 );
+                if ( roundNearEven && !(uiZ.v0 & roundBitsMask) ) {
+                    uiZ.v0 &= ~lastBitMask0;
+                }
+            }
+        } else if (
+            roundingMode
+                == (signF128UI64( uiZ.v64 ) ? softfloat_round_min
+                        : softfloat_round_max)
+        ) {
+            uiZ = softfloat_add128( uiZ.v64, uiZ.v0, 0, roundBitsMask );
+        }
+        uiZ.v0 &= ~roundBitsMask;
+        lastBitMask64 = !lastBitMask0;
+    } else {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        if ( exp < 0x3FFF ) {
+            if ( !((uiA64 & UINT64_C( 0x7FFFFFFFFFFFFFFF )) | uiA0) ) return a;
+            if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+            uiZ.v64 = uiA64 & packToF128UI64( 1, 0, 0 );
+            uiZ.v0  = 0;
+            switch ( roundingMode ) {
+             case softfloat_round_near_even:
+                if ( !(fracF128UI64( uiA64 ) | uiA0) ) break;
+                RT_FALL_THROUGH(); /* VBox */
+             case softfloat_round_near_maxMag:
+                if ( exp == 0x3FFE ) uiZ.v64 |= packToF128UI64( 0, 0x3FFF, 0 );
+                break;
+             case softfloat_round_min:
+                if ( uiZ.v64 ) uiZ.v64 = packToF128UI64( 1, 0x3FFF, 0 );
+                break;
+             case softfloat_round_max:
+                if ( !uiZ.v64 ) uiZ.v64 = packToF128UI64( 0, 0x3FFF, 0 );
+                break;
+#ifdef SOFTFLOAT_ROUND_ODD
+             case softfloat_round_odd:
+                uiZ.v64 |= packToF128UI64( 0, 0x3FFF, 0 );
+                break;
+#endif
+            }
+            goto uiZ;
+        }
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        uiZ.v64 = uiA64;
+        uiZ.v0  = 0;
+        lastBitMask64 = (uint_fast64_t) 1<<(0x402F - exp);
+        roundBitsMask = lastBitMask64 - 1;
+        if ( roundingMode == softfloat_round_near_maxMag ) {
+            uiZ.v64 += lastBitMask64>>1;
+        } else if ( roundingMode == softfloat_round_near_even ) {
+            uiZ.v64 += lastBitMask64>>1;
+            if ( !((uiZ.v64 & roundBitsMask) | uiA0) ) {
+                uiZ.v64 &= ~lastBitMask64;
+            }
+        } else if (
+            roundingMode
+                == (signF128UI64( uiZ.v64 ) ? softfloat_round_min
+                        : softfloat_round_max)
+        ) {
+            uiZ.v64 = (uiZ.v64 | (uiA0 != 0)) + roundBitsMask;
+        }
+        uiZ.v64 &= ~roundBitsMask;
+        lastBitMask0 = 0;
+    }
+    if ( (uiZ.v64 != uiA64) || (uiZ.v0 != uiA0) ) {
+#ifdef SOFTFLOAT_ROUND_ODD
+        if ( roundingMode == softfloat_round_odd ) {
+            uiZ.v64 |= lastBitMask64;
+            uiZ.v0  |= lastBitMask0;
+        }
+#endif
+        if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+    }
+ uiZ:
+    uZ.ui = uiZ;
+    return uZ.f;
+
+}
+