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, 3 insertions, 5 deletions

diff --git a/src/base/random.cc b/src/base/random.cc
index ceab337d9..5390ceb46 100644
--- a/src/base/random.cc
+++ b/src/base/random.cc
@@ -29,9 +29,6 @@
  *          Ali Saidi
  */
 
-#if defined(__sun)
-#include <ieeefp.h>
-#endif
 #ifdef __SUNPRO_CC
 #include <stdlib.h>
 #include <math.h>
@@ -61,9 +58,10 @@ m5round(double r)
 {
 #if defined(__sun)
     double val;
-    fp_rnd oldrnd = fpsetround(FP_RN);
+    int oldrnd = m5_fegetround();
+    m5_fesetround(M5_FP_TONEAREST);
     val = rint(r);
-    fpsetround(oldrnd);
+    m5_fesetround(oldrnd);
     return val;
 #else
     return round(r);