-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "primitives.h"\r
-#include "internals.h"\r
-#include "softfloat.h"\r
-\r
-uint_fast64_t f64_to_ui64( float64_t a, int_fast8_t roundingMode, bool exact )\r
-{\r
- union ui64_f64 uA;\r
- uint_fast64_t uiA;\r
- bool sign;\r
- int_fast16_t exp;\r
- uint_fast64_t sig;\r
- int_fast16_t shiftCount;\r
- struct uint64_extra sigExtra;\r
-\r
- uA.f = a;\r
- uiA = uA.ui;\r
- sign = signF64UI( uiA );\r
- exp = expF64UI( uiA );\r
- sig = fracF64UI( uiA );\r
- if ( exp ) sig |= UINT64_C( 0x0010000000000000 );\r
- shiftCount = 0x433 - exp;\r
- if ( shiftCount <= 0 ) {\r
- if ( 0x43E < exp ) {\r
- softfloat_raiseFlags( softfloat_flag_invalid );\r
- return UINT64_C( 0xFFFFFFFFFFFFFFFF );\r
- }\r
- sigExtra.v = sig<<( - shiftCount );\r
- sigExtra.extra = 0;\r
- } else {\r
- sigExtra = softfloat_shift64ExtraRightJam( sig, 0, shiftCount );\r
- }\r
- return\r
- softfloat_roundPackToUI64(\r
- sign, sigExtra.v, sigExtra.extra, roundingMode, exact );\r
-\r
-}\r
-\r
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3d, 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 f64_to_ui64( float64_t a, uint_fast8_t roundingMode, bool exact )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ bool sign;
+ int_fast16_t exp;
+ uint_fast64_t sig;
+ int_fast16_t shiftDist;
+#ifdef SOFTFLOAT_FAST_INT64
+ struct uint64_extra sigExtra;
+#else
+ uint32_t extSig[3];
+#endif
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF64UI( uiA );
+ exp = expF64UI( uiA );
+ sig = fracF64UI( uiA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( exp ) sig |= UINT64_C( 0x0010000000000000 );
+ shiftDist = 0x433 - exp;
+#ifdef SOFTFLOAT_FAST_INT64
+ if ( shiftDist <= 0 ) {
+ if ( shiftDist < -11 ) goto invalid;
+ sigExtra.v = sig<<-shiftDist;
+ sigExtra.extra = 0;
+ } else {
+ sigExtra = softfloat_shiftRightJam64Extra( sig, 0, shiftDist );
+ }
+ return
+ softfloat_roundToUI64(
+ sign, sigExtra.v, sigExtra.extra, roundingMode, exact );
+#else
+ extSig[indexWord( 3, 0 )] = 0;
+ if ( shiftDist <= 0 ) {
+ if ( shiftDist < -11 ) goto invalid;
+ sig <<= -shiftDist;
+ extSig[indexWord( 3, 2 )] = sig>>32;
+ extSig[indexWord( 3, 1 )] = sig;
+ } else {
+ extSig[indexWord( 3, 2 )] = sig>>32;
+ extSig[indexWord( 3, 1 )] = sig;
+ softfloat_shiftRightJam96M( extSig, shiftDist, extSig );
+ }
+ return softfloat_roundMToUI64( sign, extSig, roundingMode, exact );
+#endif
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ invalid:
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ return
+ (exp == 0x7FF) && fracF64UI( uiA ) ? ui64_fromNaN
+ : sign ? ui64_fromNegOverflow : ui64_fromPosOverflow;
+
+}
+
projects / riscv-isa-sim.git / blobdiff