Use lower two bits of FCSR reg to determine rounding mode (may want to move this out of decoder.isa and into a template)

Have FP conversion instructions use re-defined convert_and_round() function

arch/mips/isa/decoder.isa:
    Use lower two bits of FCSR reg to determine rounding mode (may want to move this out of decoder.isa and into a template)
    Have FP conversion instructions to use re-defined convert_and_round() function
arch/mips/isa/formats/util.isa:
    Remove convert_and_round function from here
arch/mips/isa_traits.cc:
    Define convert_and_round function here
arch/mips/isa_traits.hh:
    Use "enums" to define FP conversion types & Round Modes
    Declare convert_and_round function here

--HG--
extra : convert_revision : 0f4f8c1732a53b277361559ea71af2a1feb4fc64

1 files changed, 30 insertions, 2 deletions

diff --git a/arch/mips/isa_traits.hh b/arch/mips/isa_traits.hh
index e5de675cf..3ea72bde2 100644
--- a/arch/mips/isa_traits.hh
+++ b/arch/mips/isa_traits.hh
@@ -315,13 +315,41 @@ namespace MipsISA
             return NoFault;
         }
 
-
-
         void serialize(std::ostream &os);
 
         void unserialize(Checkpoint *cp, const std::string &section);
     };
 
+        enum ConvertType{
+            SINGLE_TO_DOUBLE,
+            SINGLE_TO_WORD,
+            SINGLE_TO_LONG,
+
+            DOUBLE_TO_SINGLE,
+            DOUBLE_TO_WORD,
+            DOUBLE_TO_LONG,
+
+            LONG_TO_SINGLE,
+            LONG_TO_DOUBLE,
+            LONG_TO_WORD,
+
+            WORD_TO_SINGLE,
+            WORD_TO_DOUBLE,
+            WORD_TO_LONG,
+
+            PLOWER_TO_SINGLE,
+            PUPPER_TO_SINGLE
+        };
+
+        enum RoundMode{
+            RND_ZERO,
+            RND_DOWN,
+            RND_UP,
+            RND_NEAREST
+        };
+
+        uint64_t convert_and_round(uint64_t fp_val,ConvertType cvt_type, int rnd_mode = 0);
+
 
         void copyRegs(ExecContext *src, ExecContext *dest);