Add --disable-dtb option to suppress writing the DTB to memory

[riscv-isa-sim.git] / softfloat / f32_to_i32.c

diff --git a/softfloat/f32_to_i32.c b/softfloat/f32_to_i32.c
old mode 100755 (executable)
new mode 100644 (file)
index 98c67c9..c9f2cf9
--- a/softfloat/f32_to_i32.c
+++ b/softfloat/f32_to_i32.c
@@ -1,33 +1,84 @@
-\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
-int_fast32_t f32_to_i32( float32_t a, int_fast8_t roundingMode, bool exact )\r
-{\r
-    union ui32_f32 uA;\r
-    uint_fast32_t uiA;\r
-    bool sign;\r
-    int_fast16_t exp;\r
-    uint_fast32_t sig;\r
-    uint_fast64_t sig64;\r
-    int_fast16_t shiftCount;\r
-\r
-    uA.f = a;\r
-    uiA = uA.ui;\r
-    sign = signF32UI( uiA );\r
-    exp = expF32UI( uiA );\r
-    sig = fracF32UI( uiA );\r
-    if ( exp ) sig |= 0x00800000;\r
-    sig64 = (uint_fast64_t) sig<<32;\r
-    shiftCount = 0xAF - exp;\r
-    if ( 0 < shiftCount ) {\r
-        sig64 = softfloat_shift64RightJam( sig64, shiftCount );\r
-    }\r
-    return softfloat_roundPackToI32( sign, sig64, 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"
+
+int_fast32_t f32_to_i32( float32_t a, uint_fast8_t roundingMode, bool exact )
+{
+    union ui32_f32 uA;
+    uint_fast32_t uiA;
+    bool sign;
+    int_fast16_t exp;
+    uint_fast32_t sig;
+    uint_fast64_t sig64;
+    int_fast16_t shiftDist;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA = uA.ui;
+    sign = signF32UI( uiA );
+    exp  = expF32UI( uiA );
+    sig  = fracF32UI( uiA );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+#if (i32_fromNaN != i32_fromPosOverflow) || (i32_fromNaN != i32_fromNegOverflow)
+    if ( (exp == 0xFF) && sig ) {
+#if (i32_fromNaN == i32_fromPosOverflow)
+        sign = 0;
+#elif (i32_fromNaN == i32_fromNegOverflow)
+        sign = 1;
+#else
+        softfloat_raiseFlags( softfloat_flag_invalid );
+        return i32_fromNaN;
+#endif
+    }
+#endif
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( exp ) sig |= 0x00800000;
+    sig64 = (uint_fast64_t) sig<<32;
+    shiftDist = 0xAA - exp;
+    if ( 0 < shiftDist ) sig64 = softfloat_shiftRightJam64( sig64, shiftDist );
+    return softfloat_roundToI32( sign, sig64, roundingMode, exact );
+
+}
+