DBC: Double converstion instructions

runtime/vm/constants_dbc.h

Index: runtime/vm/constants_dbc.h
diff --git a/runtime/vm/constants_dbc.h b/runtime/vm/constants_dbc.h
index 4d9c29ab2962e88bd2f3f5d8dedaa09ab8ab0738..2314c96c7a2785a726651c266b951eb8c6c951b1 100644
--- a/runtime/vm/constants_dbc.h
+++ b/runtime/vm/constants_dbc.h
@@ -220,6 +220,16 @@ namespace dart {
 //
 //    FP[rA] <- op(FP[rD]). Assumes FP[rD] is an unboxed double.
 //
+//  - DTruncate, DFloor, DCeil rA, rD
+//
+//    Applies trunc(), floor(), or ceil() to the unboxed double in FP[rD], and
+//    stores the result in FP[rA].
+//
+//  - DoubleToFloat, FloatToDouble rA, rD
+//
+//    Convert the unboxed float or double in FP[rD] as indicated, and store the
+//    result in FP[rA].
+//
 //  - BitOr, BitAnd, BitXor rA, rB, rC
 //
 //    FP[rA] <- FP[rB] op FP[rC]. These instructions expect their operands to be
@@ -683,6 +693,11 @@ namespace dart {
   V(DSin,                          A_D, reg, reg, ___) \
   V(DPow,                        A_B_C, reg, reg, reg) \
   V(DMod,                        A_B_C, reg, reg, reg) \
+  V(DTruncate,                     A_D, reg, reg, ___) \
+  V(DFloor,                        A_D, reg, reg, ___) \
+  V(DCeil,                         A_D, reg, reg, ___) \
+  V(DoubleToFloat,                 A_D, reg, reg, ___) \
+  V(FloatToDouble,                 A_D, reg, reg, ___) \
   V(StoreStaticTOS,                  D, lit, ___, ___) \
   V(PushStatic,                      D, lit, ___, ___) \
   V(InitStaticTOS,                   0, ___, ___, ___) \