[Interpreter] TurboFan implementation of intrinsics.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index 4e7707af3f14f6b5a2f3168a60fc87e51fb6f536..a8a7ba1b550f5ef0ed1ce93ca2466fd9c1817abd 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -261,7 +261,10 @@ namespace interpreter {
   /* Non-local flow control */                                                 \
   V(Throw, OperandType::kNone)                                                 \
   V(ReThrow, OperandType::kNone)                                               \
-  V(Return, OperandType::kNone)
+  V(Return, OperandType::kNone)                                                \
+                                                                               \
+  /* Intrinsics */                                                             \
+  V(IntrinsicOneArg, OperandType::kIdx16, OperandType::kMaybeReg16)

[oth, 2016/02/01 09:52:33]

Can this be called this CallIntrinsic or InvokeIntrinsic?

Is the final register operand optional?

If not it should be a kReg8 operand here. Register translation will ensure a
single register operand is always reachable. So far kMaybeRegXX operands are
used for variable register arguments where it's valid to have a zero count of
operands.

If we foresee supporting other intrinsics in future with zero or >= two
arguments, then we could consider rationalizing into two bytecodes for all
cases:
CallIntrinsic OperandType::kIdx16, OperandType::kMaybeReg8,
OperandType::kRegCount8
CallIntrinsicWide OperandType::kIdx16, OperandType::kMaybeReg16,
OperandType::kRegCount16

[rmcilroy, 2016/02/01 11:04:44]

+1 for InvokeIntrinsic and the comment on using kReg8 instead of kMaybeReg8.

[epertoso, 2016/03/03 11:20:39]

Added InvokeIntrinsic and InvokeIntrinsicWide. As we might be adding support for
other intrinsics, I used kMaybeRegXX and kRegCountXX.

 
 // Enumeration of the size classes of operand types used by bytecodes.
 enum class OperandSize : uint8_t {