X86: Put in the foundation for x87 stack based fp registers.

--HG--
extra : convert_revision : 940f92efd4a9dc59106e991cc6d9836861ab69de

1 files changed, 10 insertions, 0 deletions

diff --git a/src/arch/x86/regfile.cc b/src/arch/x86/regfile.cc
index 96283cada..889f2f5cd 100644
--- a/src/arch/x86/regfile.cc
+++ b/src/arch/x86/regfile.cc
@@ -85,6 +85,7 @@
  * Authors: Gabe Black
  */
 
+#include "arch/x86/floatregs.hh"
 #include "arch/x86/regfile.hh"
 #include "base/trace.hh"
 #include "sim/serialize.hh"
@@ -218,6 +219,15 @@ int X86ISA::flattenIntIndex(ThreadContext * tc, int reg)
         return (reg & ~(1 << 6));
 }
 
+int X86ISA::flattenFloatIndex(ThreadContext * tc, int reg)
+{
+    if (reg > NUM_FLOATREGS) {
+        int top = tc->readMiscRegNoEffect(MISCREG_X87_TOP);
+        reg = FLOATREG_STACK(reg - NUM_FLOATREGS, top);
+    }
+    return reg;
+}
+
 void RegFile::serialize(std::ostream &os)
 {
     intRegFile.serialize(os);