create base/fenv.c to standerdize fenv across platforms. It's a c file and not a cpp file because c99

(which defines fenv) doesn't necessarily extend to c++ and it is a problem with solaris. If really
desired this could wrap the ieeefp interface found in bsd* as well, but I see no need at the moment.

src/arch/alpha/isa/fp.isa:
src/arch/sparc/isa/formats/basic.isa:
    use m5_fesetround()/m5_fegetround() istead of fenv interface directly
src/arch/sparc/isa/includes.isa:
    use base/fenv instead of fenv directly
src/base/SConscript:
    add fenv to sconscript
src/base/fenv.hh:
src/base/random.cc:
    m5 implementation to standerdize fenv across platforms.

--HG--
extra : convert_revision : 38d2629affd964dcd1a5ab0db4ac3cb21438e72c

1 files changed, 11 insertions, 10 deletions

diff --git a/src/base/fenv.hh b/src/base/fenv.hh
index 013d2f09b..42b383888 100644
--- a/src/base/fenv.hh
+++ b/src/base/fenv.hh
@@ -33,20 +33,21 @@
 
 #include "config/use_fenv.hh"
 
-#if USE_FENV
-
-#include <fenv.h>
+#define M5_FE_DOWNWARD     0
+#define M5_FE_TONEAREST    1
+#define M5_FE_TOWARDZERO   2
+#define M5_FE_UPWARD       3
 
+#if USE_FENV
+extern "C" {
+void m5_fesetround(int rm);
+int m5_fegetround();
+}
 #else
 
 // Dummy definitions to allow code to compile w/o a real <fenv.h>.
-
-#define FE_TONEAREST    0
-#define FE_DOWNWARD     0
-#define FE_UPWARD       0
-#define FE_TOWARDZERO   0
-
-inline int fesetround(int rounding_mode) { return 0; }
+inline void m5_fesetround(int rm) { ; }
+inline int m5_fegetround() {return 0; }
 
 #endif // USE_FENV