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+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
+(Regents). All Rights Reserved. Redistribution and use in source and binary
+forms, with or without modification, are permitted provided that the following
+conditions are met:
+
+Redistributions of source code must retain the above copyright notice,
+this list of conditions, and the following two paragraphs of disclaimer.
+Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions, and the following two paragraphs of disclaimer in the
+documentation and/or other materials provided with the distribution. Neither
+the name of the Regents nor the names of its contributors may be used to
+endorse or promote products derived from this software without specific prior
+written permission.
+
+IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
+SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
+OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
+BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
+HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
+MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+=============================================================================*/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+int_fast64_t f32_to_i64_r_minMag( float32_t a, bool exact )
+{
+ union ui32_f32 uA;
+ uint_fast32_t uiA;
+ int_fast16_t exp;
+ uint_fast32_t sig;
+ int_fast16_t shiftCount;
+ bool sign;
+ uint_fast64_t sig64;
+ int_fast64_t absZ;
+
+ uA.f = a;
+ uiA = uA.ui;
+ exp = expF32UI( uiA );
+ sig = fracF32UI( uiA );
+ shiftCount = 0xBE - exp;
+ if ( 64 <= shiftCount ) {
+ if ( exact && (exp | sig) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return 0;
+ }
+ sign = signF32UI( uiA );
+ if ( shiftCount <= 0 ) {
+ if ( uiA != packToF32UI( 1, 0xBE, 0 ) ) {
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ if ( ! sign || ((exp == 0xFF) && sig) ) {
+ return INT64_C( 0x7FFFFFFFFFFFFFFF );
+ }
+ }
+ return -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
+ }
+ sig |= 0x00800000;
+ sig64 = (uint_fast64_t) sig<<40;
+ absZ = sig64>>shiftCount;
+ shiftCount = 40 - shiftCount;
+ if ( exact && (shiftCount < 0) && (uint32_t) (sig<<(shiftCount & 31)) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return sign ? -absZ : absZ;
+
+}
+