-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "internals.h"\r
-#include "softfloat.h"\r
-\r
-int_fast64_t f64_to_i64_r_minMag( float64_t a, 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
- int_fast64_t absZ;\r
-\r
- uA.f = a;\r
- uiA = uA.ui;\r
- sign = signF64UI( uiA );\r
- exp = expF64UI( uiA );\r
- sig = fracF64UI( uiA );\r
- shiftCount = exp - 0x433;\r
- if ( 0 <= shiftCount ) {\r
- if ( 0x43E <= exp ) {\r
- if ( uiA != packToF64UI( 1, 0x43E, 0 ) ) {\r
- softfloat_raiseFlags( softfloat_flag_invalid );\r
- if ( ! sign || ( ( exp == 0x7FF ) && sig ) ) {\r
- return INT64_C( 0x7FFFFFFFFFFFFFFF );\r
- }\r
- }\r
- return - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;\r
- }\r
- sig |= UINT64_C( 0x0010000000000000 );\r
- absZ = sig<<shiftCount;\r
- } else {\r
- if ( exp < 0x3FF ) {\r
- if ( exact && ( exp | sig ) ) {\r
- softfloat_exceptionFlags |= softfloat_flag_inexact;\r
- }\r
- return 0;\r
- }\r
- sig |= UINT64_C( 0x0010000000000000 );\r
- absZ = sig>>( - shiftCount );\r
- if ( exact && (uint64_t) ( sig<<( shiftCount & 63 ) ) ) {\r
- softfloat_exceptionFlags |= softfloat_flag_inexact;\r
- }\r
- }\r
- return sign ? - absZ : absZ;\r
-\r
-}\r
-\r
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3a+, 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 f64_to_i64_r_minMag( float64_t a, bool exact )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ bool sign;
+ int_fast16_t exp;
+ uint_fast64_t sig;
+ int_fast16_t shiftDist;
+ int_fast64_t absZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF64UI( uiA );
+ exp = expF64UI( uiA );
+ sig = fracF64UI( uiA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ shiftDist = 0x433 - exp;
+ if ( shiftDist <= 0 ) {
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ if ( shiftDist < -10 ) {
+ if ( uiA == packToF64UI( 1, 0x43E, 0 ) ) {
+ return -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
+ }
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ return
+ (exp == 0x7FF) && sig ? i64_fromNaN
+ : sign ? i64_fromNegOverflow : i64_fromPosOverflow;
+ }
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ sig |= UINT64_C( 0x0010000000000000 );
+ absZ = sig<<-shiftDist;
+ } else {
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ if ( 53 <= shiftDist ) {
+ if ( exact && (exp | sig) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return 0;
+ }
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ sig |= UINT64_C( 0x0010000000000000 );
+ absZ = sig>>shiftDist;
+ if ( exact && (absZ<<shiftDist != sig) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ }
+ return sign ? -absZ : absZ;
+
+}
+
projects / riscv-isa-sim.git / blobdiff