X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=softfloat%2Ff64_to_i64.c;h=58cb45b96814b067d67a1006cc66641c2e6e6d5b;hb=ba28ea06d5ca18e47d8252cb8c677d79e62b7554;hp=676e944dd6ceb48ada3d224be07ea9281db25976;hpb=3face89fafd851e17343d0fa646852f332af3a0b;p=riscv-isa-sim.git

diff --git a/softfloat/f64_to_i64.c b/softfloat/f64_to_i64.c
old mode 100755
new mode 100644
index 676e944..58cb45b
--- a/softfloat/f64_to_i64.c
+++ b/softfloat/f64_to_i64.c
@@ -1,46 +1,103 @@
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "platform.h"
-#include "primitives.h"
-#include "internals.h"
-#include "softfloat.h"
-
-int_fast64_t f64_to_i64( float64_t a, int_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 shiftCount;
-    struct uint64_extra sigExtra;
-
-    uA.f = a;
-    uiA = uA.ui;
-    sign = signF64UI( uiA );
-    exp = expF64UI( uiA );
-    sig = fracF64UI( uiA );
-    if ( exp ) sig |= UINT64_C( 0x0010000000000000 );
-    shiftCount = 0x433 - exp;
-    if ( shiftCount <= 0 ) {
-        if ( 0x43E < exp ) {
-            softfloat_raiseFlags( softfloat_flag_invalid );
-            return
-                ! sign
-                    || ( ( exp == 0x7FF )
-                             && fracF64UI( uiA ) )
-                    ? INT64_C( 0x7FFFFFFFFFFFFFFF )
-                    : - INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1;
-        }
-        sigExtra.v = sig<<( - shiftCount );
-        sigExtra.extra = 0;
-    } else {
-        sigExtra = softfloat_shift64ExtraRightJam( sig, 0, shiftCount );
-    }
-    return
-        softfloat_roundPackToI64(
-            sign, sigExtra.v, sigExtra.extra, roundingMode, exact );
-
-}
-
+
+/*============================================================================
+
+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( 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_roundPackToI64(
+            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_roundPackMToI64( sign, extSig, roundingMode, exact );
+#endif
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ invalid:
+    softfloat_raiseFlags( softfloat_flag_invalid );
+    return
+        (exp == 0x7FF) && fracF64UI( uiA ) ? i64_fromNaN
+            : sign ? i64_fromNegOverflow : i64_fromPosOverflow;
+
+}
+