Merge zizzer.eecs.umich.edu:/bk/newmem

into  doughnut.mwconnections.com:/home/gblack/m5/newmem-x86

--HG--
extra : convert_revision : 3f17fc418ee5a30da2b08a515fb394cc8fcdd237

1 files changed, 56 insertions, 0 deletions

diff --git a/src/base/fenv.c b/src/base/fenv.c
new file mode 100644
index 000000000..269913a60
--- /dev/null
+++ b/src/base/fenv.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2007 The Regents of The University of Michigan
+ * 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 disclaimer;
+ * 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;
+ * neither the name of the copyright holders 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * Authors: Ali Saidi
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <fenv.h>
+
+void m5_fesetround(int rm);
+int m5_fegetround();
+
+static const int m5_round_ops[] =  {FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD};
+
+void m5_fesetround(int rm)
+{
+    assert(rm > 0 && rm < 4);
+    fesetround(m5_round_ops[rm]);
+}
+
+int m5_fegetround()
+{
+    int x;
+    int rm = fegetround();
+    for(x = 0; x < 4; x++)
+        if (m5_round_ops[x] == rm)
+            return x;
+    abort();
+    return 0;
+}
+