Support debug system bus access.

[riscv-isa-sim.git] / softfloat / f32_to_i32_r_minMag.c

diff --git a/softfloat/f32_to_i32_r_minMag.c b/softfloat/f32_to_i32_r_minMag.c
old mode 100755 (executable)
new mode 100644 (file)
index 63ff1e2..1a94dcc
--- a/softfloat/f32_to_i32_r_minMag.c
+++ b/softfloat/f32_to_i32_r_minMag.c
@@ -1,45 +1,89 @@
-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "internals.h"\r
-#include "softfloat.h"\r
-\r
-int_fast32_t f32_to_i32_r_minMag( float32_t a, bool exact )\r
-{\r
-    union ui32_f32 uA;\r
-    uint_fast32_t uiA;\r
-    int_fast16_t exp;\r
-    uint_fast32_t sig;\r
-    bool sign;\r
-    int_fast16_t shiftCount;\r
-    int_fast32_t absZ;\r
-\r
-    uA.f = a;\r
-    uiA = uA.ui;\r
-    exp = expF32UI( uiA );\r
-    sig = fracF32UI( uiA );\r
-    if ( exp < 0x7F ) {\r
-        if ( exact && ( exp | sig ) ) {\r
-            softfloat_exceptionFlags |= softfloat_flag_inexact;\r
-        }\r
-        return 0;\r
-    }\r
-    sign = signF32UI( uiA );\r
-    shiftCount = 0x9E - exp;\r
-    if ( shiftCount <= 0 ) {\r
-        if ( uiA != packToF32UI( 1, 0x9E, 0 ) ) {\r
-            softfloat_raiseFlags( softfloat_flag_invalid );\r
-            if ( ! sign || ( ( exp == 0xFF ) && sig ) ) return 0x7FFFFFFF;\r
-        }\r
-        return -0x7FFFFFFF - 1;\r
-    }\r
-    sig = ( sig | 0x00800000 )<<8;\r
-    absZ = sig>>shiftCount;\r
-    if ( exact && (uint32_t) ( sig<<( ( - shiftCount ) & 31 ) ) ) {\r
-        softfloat_exceptionFlags |= softfloat_flag_inexact;\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 3d, 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_fast32_t f32_to_i32_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 shiftDist;
+    bool sign;
+    int_fast32_t absZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA = uA.ui;
+    exp = expF32UI( uiA );
+    sig = fracF32UI( uiA );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    shiftDist = 0x9E - exp;
+    if ( 32 <= shiftDist ) {
+        if ( exact && (exp | sig) ) {
+            softfloat_exceptionFlags |= softfloat_flag_inexact;
+        }
+        return 0;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sign = signF32UI( uiA );
+    if ( shiftDist <= 0 ) {
+        if ( uiA == packToF32UI( 1, 0x9E, 0 ) ) return -0x7FFFFFFF - 1;
+        softfloat_raiseFlags( softfloat_flag_invalid );
+        return
+            (exp == 0xFF) && sig ? i32_fromNaN
+                : sign ? i32_fromNegOverflow : i32_fromPosOverflow;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sig = (sig | 0x00800000)<<8;
+    absZ = sig>>shiftDist;
+    if ( exact && ((uint_fast32_t) absZ<<shiftDist != sig) ) {
+        softfloat_exceptionFlags |= softfloat_flag_inexact;
+    }
+    return sign ? -absZ : absZ;
+
+}
+