[project @ 2005-10-21 14:02:17 by simonmar]
[ghc-hetmet.git] / ghc / rts / PrimOps.cmm
index 84b34d0..dfaa0b5 100644 (file)
@@ -49,7 +49,7 @@ newByteArrayzh_fast
     n = R1;
     payload_words = ROUNDUP_BYTES_TO_WDS(n);
     words = BYTES_TO_WDS(SIZEOF_StgArrWords) + payload_words;
-    "ptr" p = foreign "C" allocateLocal(BaseReg "ptr",words);
+    "ptr" p = foreign "C" allocateLocal(MyCapability() "ptr",words) [];
     TICK_ALLOC_PRIM(SIZEOF_StgArrWords,WDS(payload_words),0);
     SET_HDR(p, stg_ARR_WORDS_info, W_[CCCS]);
     StgArrWords_words(p) = payload_words;
@@ -73,7 +73,7 @@ newPinnedByteArrayzh_fast
        words = words + 1;
     }
 
-    "ptr" p = foreign "C" allocatePinned(words);
+    "ptr" p = foreign "C" allocatePinned(words) [];
     TICK_ALLOC_PRIM(SIZEOF_StgArrWords,WDS(payload_words),0);
 
     // Again, if the ArrWords header isn't a multiple of 8 bytes, we
@@ -97,7 +97,7 @@ newArrayzh_fast
     MAYBE_GC(R2_PTR,newArrayzh_fast);
 
     words = BYTES_TO_WDS(SIZEOF_StgMutArrPtrs) + n;
-    "ptr" arr = foreign "C" allocateLocal(BaseReg "ptr",words);
+    "ptr" arr = foreign "C" allocateLocal(MyCapability() "ptr",words) [];
     TICK_ALLOC_PRIM(SIZEOF_StgMutArrPtrs, WDS(n), 0);
 
     SET_HDR(arr, stg_MUT_ARR_PTRS_info, W_[CCCS]);
@@ -131,11 +131,11 @@ unsafeThawArrayzh_fast
 
   // So, when we thaw a MUT_ARR_PTRS_FROZEN, we must cope with two cases:
   // either it is on a mut_list, or it isn't.  We adopt the convention that
-  // the mut_link field is NULL if it isn't on a mut_list, and the GC
-  // maintains this invariant.
+  // the closure type is MUT_ARR_PTRS_FROZEN0 if it is on the mutable list,
+  // and MUT_ARR_PTRS_FROZEN otherwise.
   //
   if (%INFO_TYPE(%GET_STD_INFO(R1)) != HALF_W_(MUT_ARR_PTRS_FROZEN0)) {
-       foreign "C" recordMutableLock(R1 "ptr");
+       foreign "C" recordMutableLock(R1 "ptr") [R1];
   }
 
   SET_INFO(R1,stg_MUT_ARR_PTRS_info);
@@ -233,33 +233,13 @@ atomicModifyMutVarzh_fast
    StgThunk_payload(r,0) = z;
 
 #if defined(SMP)
-    foreign "C" RELEASE_LOCK(sm_mutex "ptr");
+    foreign "C" RELEASE_LOCK(sm_mutex "ptr") [];
 #endif
 
    RET_P(r);
 }
 
 /* -----------------------------------------------------------------------------
-   Foreign Object Primitives
-   -------------------------------------------------------------------------- */
-
-mkForeignObjzh_fast
-{
-  /* R1 = ptr to foreign object,
-  */
-  W_ result;
-
-  ALLOC_PRIM( SIZEOF_StgForeignObj, NO_PTRS, mkForeignObjzh_fast);
-
-  result = Hp - SIZEOF_StgForeignObj + WDS(1);
-  SET_HDR(result,stg_FOREIGN_info,W_[CCCS]);
-  StgForeignObj_data(result) = R1;
-
-  /* returns (# s#, ForeignObj# #) */
-  RET_P(result);
-}
-
-/* -----------------------------------------------------------------------------
    Weak Pointer Primitives
    -------------------------------------------------------------------------- */
 
@@ -289,7 +269,7 @@ mkWeakzh_fast
   StgWeak_link(w)      = W_[weak_ptr_list];
   W_[weak_ptr_list]    = w;
 
-  IF_DEBUG(weak, foreign "C" debugBelch(stg_weak_msg,w));
+  IF_DEBUG(weak, foreign "C" debugBelch(stg_weak_msg,w) []);
 
   RET_P(w);
 }
@@ -582,10 +562,10 @@ name                                                                    \
   MP_INT__mp_size(mp_tmp2)  = (s2);                                     \
   MP_INT__mp_d(mp_tmp2)            = BYTE_ARR_CTS(d2);                         \
                                                                         \
-  foreign "C" mpz_init(mp_result1 "ptr");                               \
+  foreign "C" mpz_init(mp_result1 "ptr") [];                            \
                                                                         \
   /* Perform the operation */                                           \
-  foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1  "ptr",mp_tmp2  "ptr");   \
+  foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1  "ptr",mp_tmp2  "ptr") []; \
                                                                         \
   RET_NP(TO_W_(MP_INT__mp_size(mp_result1)),                            \
          MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords);                \
@@ -609,10 +589,10 @@ name                                                                    \
   MP_INT__mp_size(mp_tmp1)     = (s1);                                 \
   MP_INT__mp_d(mp_tmp1)                = BYTE_ARR_CTS(d1);                     \
                                                                         \
-  foreign "C" mpz_init(mp_result1 "ptr");                               \
+  foreign "C" mpz_init(mp_result1 "ptr") [];                            \
                                                                         \
   /* Perform the operation */                                           \
-  foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1 "ptr");                   \
+  foreign "C" mp_fun(mp_result1 "ptr",mp_tmp1 "ptr") [];                \
                                                                         \
   RET_NP(TO_W_(MP_INT__mp_size(mp_result1)),                            \
          MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords);                \
@@ -643,11 +623,11 @@ name
   MP_INT__mp_size(mp_tmp2)     = (s2);                                                 \
   MP_INT__mp_d(mp_tmp2)                = BYTE_ARR_CTS(d2);                                     \
                                                                                         \
-  foreign "C" mpz_init(mp_result1 "ptr");                                               \
-  foreign "C" mpz_init(mp_result2 "ptr");                                               \
+  foreign "C" mpz_init(mp_result1 "ptr") [];                                               \
+  foreign "C" mpz_init(mp_result2 "ptr") [];                                               \
                                                                                         \
   /* Perform the operation */                                                           \
-  foreign "C" mp_fun(mp_result1 "ptr",mp_result2 "ptr",mp_tmp1 "ptr",mp_tmp2 "ptr");    \
+  foreign "C" mp_fun(mp_result1 "ptr",mp_result2 "ptr",mp_tmp1 "ptr",mp_tmp2 "ptr") [];    \
                                                                                         \
   RET_NPNP(TO_W_(MP_INT__mp_size(mp_result1)),                                          \
            MP_INT__mp_d(mp_result1) - SIZEOF_StgArrWords,                               \
@@ -683,7 +663,7 @@ gcdIntzh_fast
     FETCH_MP_TEMP(mp_tmp_w);
 
     W_[mp_tmp_w] = R1;
-    r = foreign "C" mpn_gcd_1(mp_tmp_w "ptr", 1, R2);
+    r = foreign "C" mpn_gcd_1(mp_tmp_w "ptr", 1, R2) [];
 
     R1 = r;
     /* Result parked in R1, return via info-pointer at TOS */
@@ -694,7 +674,7 @@ gcdIntzh_fast
 gcdIntegerIntzh_fast
 {
     /* R1 = s1; R2 = d1; R3 = the int */
-    R1 = foreign "C" mpn_gcd_1( BYTE_ARR_CTS(R2) "ptr", R1, R3);
+    R1 = foreign "C" mpn_gcd_1( BYTE_ARR_CTS(R2) "ptr", R1, R3) [];
     
     /* Result parked in R1, return via info-pointer at TOS */
     jump %ENTRY_CODE(Sp(0));
@@ -775,7 +755,7 @@ cmpIntegerzh_fast
     up = BYTE_ARR_CTS(R2);
     vp = BYTE_ARR_CTS(R4);
 
-    cmp = foreign "C" mpn_cmp(up "ptr", vp "ptr", size);
+    cmp = foreign "C" mpn_cmp(up "ptr", vp "ptr", size) [];
 
     if (cmp == 0 :: CInt) {
        R1 = 0; 
@@ -849,7 +829,7 @@ decodeFloatzh_fast
     MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(p);
     
     /* Perform the operation */
-    foreign "C" __decodeFloat(mp_tmp1 "ptr",mp_tmp_w "ptr" ,arg);
+    foreign "C" __decodeFloat(mp_tmp1 "ptr",mp_tmp_w "ptr" ,arg) [];
     
     /* returns: (Int# (expn), Int#, ByteArray#) */
     RET_NNP(W_[mp_tmp_w], TO_W_(MP_INT__mp_size(mp_tmp1)), p);
@@ -878,7 +858,7 @@ decodeDoublezh_fast
     MP_INT__mp_d(mp_tmp1) = BYTE_ARR_CTS(p);
 
     /* Perform the operation */
-    foreign "C" __decodeDouble(mp_tmp1 "ptr", mp_tmp_w "ptr",arg);
+    foreign "C" __decodeDouble(mp_tmp1 "ptr", mp_tmp_w "ptr",arg) [];
     
     /* returns: (Int# (expn), Int#, ByteArray#) */
     RET_NNP(W_[mp_tmp_w], TO_W_(MP_INT__mp_size(mp_tmp1)), p);
@@ -895,9 +875,10 @@ forkzh_fast
   MAYBE_GC(R1_PTR, forkzh_fast);
 
   // create it right now, return ThreadID in R1
-  "ptr" R1 = foreign "C" createIOThread( RtsFlags_GcFlags_initialStkSize(RtsFlags), 
-                                  R1 "ptr");
-  foreign "C" scheduleThread(R1 "ptr");
+  "ptr" R1 = foreign "C" createIOThread( MyCapability() "ptr", 
+                               RtsFlags_GcFlags_initialStkSize(RtsFlags), 
+                               R1 "ptr");
+  foreign "C" scheduleThread(MyCapability() "ptr", R1 "ptr");
 
   // switch at the earliest opportunity
   CInt[context_switch] = 1 :: CInt;
@@ -931,7 +912,7 @@ isCurrentThreadBoundzh_fast
 {
   /* no args */
   W_ r;
-  r = foreign "C" isThreadBound(CurrentTSO);
+  r = foreign "C" isThreadBound(CurrentTSO) [];
   RET_N(r);
 }
 
@@ -991,8 +972,8 @@ INFO_TABLE_RET(stg_catch_retry_frame,
 
    frame = Sp;
    trec = StgTSO_trec(CurrentTSO);
-   "ptr" outer = foreign "C" stmGetEnclosingTRec(trec "ptr");
-   r = foreign "C" stmCommitNestedTransaction(BaseReg "ptr", trec "ptr");
+   "ptr" outer = foreign "C" stmGetEnclosingTRec(trec "ptr") [];
+   r = foreign "C" stmCommitNestedTransaction(MyCapability() "ptr", trec "ptr") [];
    if (r) {
      /* Succeeded (either first branch or second branch) */
      StgTSO_trec(CurrentTSO) = outer;
@@ -1002,7 +983,7 @@ INFO_TABLE_RET(stg_catch_retry_frame,
    } else {
      /* Did not commit: retry */
      W_ new_trec;
-     "ptr" new_trec = foreign "C" stmStartTransaction(BaseReg "ptr", outer "ptr");
+     "ptr" new_trec = foreign "C" stmStartTransaction(MyCapability() "ptr", outer "ptr") [];
      StgTSO_trec(CurrentTSO) = new_trec;
      if (StgCatchRetryFrame_running_alt_code(frame)) {
        R1 = StgCatchRetryFrame_alt_code(frame);
@@ -1072,7 +1053,7 @@ INFO_TABLE_RET(stg_atomically_frame,
        jump stg_block_noregs;
      } else {
        /* Previous attempt is no longer valid: try again */
-       "ptr" trec = foreign "C" stmStartTransaction(BaseReg "ptr", NO_TREC "ptr");
+       "ptr" trec = foreign "C" stmStartTransaction(MyCapability() "ptr", NO_TREC "ptr");
        StgTSO_trec(CurrentTSO) = trec;
        StgAtomicallyFrame_waiting(frame) = 0 :: CInt; /* false; */
        R1 = StgAtomicallyFrame_code(frame);
@@ -1081,7 +1062,7 @@ INFO_TABLE_RET(stg_atomically_frame,
      }
    } else {
      /* The TSO is not currently waiting: try to commit the transaction */
-     valid = foreign "C" stmCommitTransaction(BaseReg "ptr", trec "ptr");
+     valid = foreign "C" stmCommitTransaction(MyCapability() "ptr", trec "ptr");
      if (valid) {
        /* Transaction was valid: commit succeeded */
        StgTSO_trec(CurrentTSO) = NO_TREC;
@@ -1090,7 +1071,7 @@ INFO_TABLE_RET(stg_atomically_frame,
        jump %ENTRY_CODE(Sp(SP_OFF));
      } else {
        /* Transaction was not valid: try again */
-       "ptr" trec = foreign "C" stmStartTransaction(BaseReg "ptr", NO_TREC "ptr");
+       "ptr" trec = foreign "C" stmStartTransaction(MyCapability() "ptr", NO_TREC "ptr");
        StgTSO_trec(CurrentTSO) = trec;
        R1 = StgAtomicallyFrame_code(frame);
        Sp_adj(-1);
@@ -1182,7 +1163,7 @@ atomicallyzh_fast
   /* Start the memory transcation */
   old_trec = StgTSO_trec(CurrentTSO);
   ASSERT(old_trec == NO_TREC);
-  "ptr" new_trec = foreign "C" stmStartTransaction(BaseReg "ptr", old_trec "ptr");
+  "ptr" new_trec = foreign "C" stmStartTransaction(MyCapability() "ptr", old_trec "ptr");
   StgTSO_trec(CurrentTSO) = new_trec;
 
   /* Apply R1 to the realworld token */
@@ -1227,7 +1208,7 @@ catchRetryzh_fast
 
   /* Start a nested transaction within which to run the first code */
   trec = StgTSO_trec(CurrentTSO);
-  "ptr" new_trec = foreign "C" stmStartTransaction(BaseReg "ptr", trec "ptr");
+  "ptr" new_trec = foreign "C" stmStartTransaction(MyCapability() "ptr", trec "ptr");
   StgTSO_trec(CurrentTSO) = new_trec;
 
   /* Set up the catch-retry frame */
@@ -1270,7 +1251,7 @@ retry_pop_stack:
     ASSERT(outer != NO_TREC);
     if (!StgCatchRetryFrame_running_alt_code(frame)) {
       // Retry in the first code: try the alternative
-      "ptr" trec = foreign "C" stmStartTransaction(BaseReg "ptr", outer "ptr");
+      "ptr" trec = foreign "C" stmStartTransaction(MyCapability() "ptr", outer "ptr");
       StgTSO_trec(CurrentTSO) = trec;
       StgCatchRetryFrame_running_alt_code(frame) = 1 :: CInt; // true;
       R1 = StgCatchRetryFrame_alt_code(frame);
@@ -1280,9 +1261,9 @@ retry_pop_stack:
       // Retry in the alternative code: propagate
       W_ other_trec;
       other_trec = StgCatchRetryFrame_first_code_trec(frame);
-      r = foreign "C" stmCommitNestedTransaction(BaseReg "ptr", other_trec "ptr");
+      r = foreign "C" stmCommitNestedTransaction(MyCapability() "ptr", other_trec "ptr");
       if (r) {
-        r = foreign "C" stmCommitNestedTransaction(BaseReg "ptr", trec "ptr");
+        r = foreign "C" stmCommitNestedTransaction(MyCapability() "ptr", trec "ptr");
       }
       if (r) {
         // Merge between siblings succeeded: commit it back to enclosing transaction
@@ -1292,7 +1273,7 @@ retry_pop_stack:
         goto retry_pop_stack;
       } else {
         // Merge failed: we musn't propagate the retry.  Try both paths again.
-        "ptr" trec = foreign "C" stmStartTransaction(BaseReg "ptr", outer "ptr");
+        "ptr" trec = foreign "C" stmStartTransaction(MyCapability() "ptr", outer "ptr");
         StgCatchRetryFrame_first_code_trec(frame) = trec;
         StgCatchRetryFrame_running_alt_code(frame) = 0 :: CInt; // false;
         StgTSO_trec(CurrentTSO) = trec;
@@ -1306,7 +1287,7 @@ retry_pop_stack:
   // We've reached the ATOMICALLY_FRAME: attempt to wait 
   ASSERT(frame_type == ATOMICALLY_FRAME);
   ASSERT(outer == NO_TREC);
-  r = foreign "C" stmWait(BaseReg "ptr", CurrentTSO "ptr", trec "ptr");
+  r = foreign "C" stmWait(MyCapability() "ptr", CurrentTSO "ptr", trec "ptr");
   if (r) {
     // Transaction was valid: stmWait put us on the TVars' queues, we now block
     StgAtomicallyFrame_waiting(frame) = 1 :: CInt; // true
@@ -1318,7 +1299,7 @@ retry_pop_stack:
     jump stg_block_noregs;
   } else {
     // Transaction was not valid: retry immediately
-    "ptr" trec = foreign "C" stmStartTransaction(BaseReg "ptr", outer "ptr");
+    "ptr" trec = foreign "C" stmStartTransaction(MyCapability() "ptr", outer "ptr");
     StgTSO_trec(CurrentTSO) = trec;
     R1 = StgAtomicallyFrame_code(frame);
     Sp = frame;
@@ -1337,7 +1318,7 @@ newTVarzh_fast
 
   MAYBE_GC (R1_PTR, newTVarzh_fast); 
   new_value = R1;
-  tv = foreign "C" stmNewTVar(BaseReg "ptr", new_value "ptr");
+  "ptr" tv = foreign "C" stmNewTVar(MyCapability() "ptr", new_value "ptr");
   RET_P(tv);
 }
 
@@ -1353,7 +1334,7 @@ readTVarzh_fast
   MAYBE_GC (R1_PTR, readTVarzh_fast); // Call to stmReadTVar may allocate
   trec = StgTSO_trec(CurrentTSO);
   tvar = R1;
-  "ptr" result = foreign "C" stmReadTVar(BaseReg "ptr", trec "ptr", tvar "ptr");
+  "ptr" result = foreign "C" stmReadTVar(MyCapability() "ptr", trec "ptr", tvar "ptr") [];
 
   RET_P(result);
 }
@@ -1372,7 +1353,7 @@ writeTVarzh_fast
   trec = StgTSO_trec(CurrentTSO);
   tvar = R1;
   new_value = R2;
-  foreign "C" stmWriteTVar(BaseReg "ptr", trec "ptr", tvar "ptr", new_value "ptr");
+  foreign "C" stmWriteTVar(MyCapability() "ptr", trec "ptr", tvar "ptr", new_value "ptr") [];
 
   jump %ENTRY_CODE(Sp(0));
 }
@@ -1498,10 +1479,11 @@ takeMVarzh_fast
 
 #if defined(GRAN) || defined(PAR)
       /* ToDo: check 2nd arg (mvar) is right */
-      "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar),mvar);
+      "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar),mvar) [];
       StgMVar_head(mvar) = tso;
 #else
-      "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr");
+      "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr", 
+                                        StgMVar_head(mvar) "ptr") [];
       StgMVar_head(mvar) = tso;
 #endif
 
@@ -1570,10 +1552,11 @@ tryTakeMVarzh_fast
 
 #if defined(GRAN) || defined(PAR)
        /* ToDo: check 2nd arg (mvar) is right */
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr", mvar "ptr");
+       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr", mvar "ptr") [];
        StgMVar_head(mvar) = tso;
 #else
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr");
+       "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr",
+                                          StgMVar_head(mvar) "ptr") [];
        StgMVar_head(mvar) = tso;
 #endif
 
@@ -1638,10 +1621,10 @@ putMVarzh_fast
       
 #if defined(GRAN) || defined(PAR)
        /* ToDo: check 2nd arg (mvar) is right */
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr",mvar "ptr");
+       "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr", StgMVar_head(mvar) "ptr",mvar "ptr") [];
        StgMVar_head(mvar) = tso;
 #else
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr");
+       "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr", StgMVar_head(mvar) "ptr") [];
        StgMVar_head(mvar) = tso;
 #endif
 
@@ -1703,10 +1686,10 @@ tryPutMVarzh_fast
       
 #if defined(GRAN) || defined(PAR)
        /* ToDo: check 2nd arg (mvar) is right */
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr",mvar "ptr");
+       "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr", StgMVar_head(mvar) "ptr",mvar "ptr") [];
        StgMVar_head(mvar) = tso;
 #else
-       "ptr" tso = foreign "C" unblockOne(StgMVar_head(mvar) "ptr");
+       "ptr" tso = foreign "C" unblockOne(MyCapability() "ptr", StgMVar_head(mvar) "ptr") [];
        StgMVar_head(mvar) = tso;
 #endif
 
@@ -1746,7 +1729,7 @@ makeStableNamezh_fast
 
     ALLOC_PRIM( SIZEOF_StgStableName, R1_PTR, makeStableNamezh_fast );
   
-    index = foreign "C" lookupStableName(R1 "ptr");
+    index = foreign "C" lookupStableName(R1 "ptr") [];
 
     /* Is there already a StableName for this heap object?
      *  stable_ptr_table is a pointer to an array of snEntry structs.
@@ -1769,7 +1752,7 @@ makeStablePtrzh_fast
     /* Args: R1 = a */
     W_ sp;
     MAYBE_GC(R1_PTR, makeStablePtrzh_fast);
-    "ptr" sp = foreign "C" getStablePtr(R1 "ptr");
+    "ptr" sp = foreign "C" getStablePtr(R1 "ptr") [];
     RET_N(sp);
 }
 
@@ -1873,7 +1856,7 @@ waitReadzh_fast
     /* args: R1 */
 #ifdef THREADED_RTS
     foreign "C" barf("waitRead# on threaded RTS");
-#endif
+#else
 
     ASSERT(StgTSO_why_blocked(CurrentTSO) == NotBlocked::I16);
     StgTSO_why_blocked(CurrentTSO) = BlockedOnRead::I16;
@@ -1882,6 +1865,7 @@ waitReadzh_fast
     // threaded RTS anyway.
     APPEND_TO_BLOCKED_QUEUE(CurrentTSO);
     jump stg_block_noregs;
+#endif
 }
 
 waitWritezh_fast
@@ -1889,7 +1873,7 @@ waitWritezh_fast
     /* args: R1 */
 #ifdef THREADED_RTS
     foreign "C" barf("waitWrite# on threaded RTS");
-#endif
+#else
 
     ASSERT(StgTSO_why_blocked(CurrentTSO) == NotBlocked::I16);
     StgTSO_why_blocked(CurrentTSO) = BlockedOnWrite::I16;
@@ -1898,6 +1882,7 @@ waitWritezh_fast
     // threaded RTS anyway.
     APPEND_TO_BLOCKED_QUEUE(CurrentTSO);
     jump stg_block_noregs;
+#endif
 }
 
 
@@ -1913,7 +1898,7 @@ delayzh_fast
 
 #ifdef THREADED_RTS
     foreign "C" barf("delay# on threaded RTS");
-#endif
+#else
 
     /* args: R1 (microsecond delay amount) */
     ASSERT(StgTSO_why_blocked(CurrentTSO) == NotBlocked::I16);
@@ -1963,6 +1948,7 @@ while:
     }
     jump stg_block_noregs;
 #endif
+#endif /* !THREADED_RTS */
 }