X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2FException.cmm;h=cf24ef5b497359d0e6aa38d2e6dd5727e554689f;hb=c9acb4de50dd2b7f7ece5491f60598f0a4815e75;hp=75f2c15d93c301b4627a2bb0c23f9d9ad7e63e00;hpb=579bc757533c8c9e5beabe5b21daddd922c1af75;p=ghc-hetmet.git

diff --git a/rts/Exception.cmm b/rts/Exception.cmm
index 75f2c15..cf24ef5 100644
--- a/rts/Exception.cmm
+++ b/rts/Exception.cmm
@@ -64,23 +64,10 @@ INFO_TABLE_RET( stg_unblockAsyncExceptionszh_ret, RET_SMALL )
          * thread, which might result in the thread being killed.
          */
 
-#ifndef REG_R1
-        /*
-         * raiseAsync assumes that the stack is in ThreadRunGHC state,
-         * i.e. with a return address on the top.  In unreg mode, the
-         * return value for IO is on top of the return address, so we
-         * need to make a small adjustment here.
-         */
-        Sp_adj(1);
-#endif
         STK_CHK_GEN( WDS(2), R1_PTR, stg_unblockAsyncExceptionszh_ret_info);
         Sp_adj(-2);
         Sp(1) = R1;
-#ifdef REG_R1
         Sp(0) = stg_gc_unpt_r1_info;
-#else
-        Sp(0) = stg_ut_1_0_unreg_info;
-#endif
         SAVE_THREAD_STATE();
         (r) = foreign "C" maybePerformBlockedException (MyCapability() "ptr", 
     					              CurrentTSO "ptr") [R1];
@@ -94,25 +81,10 @@ INFO_TABLE_RET( stg_unblockAsyncExceptionszh_ret, RET_SMALL )
                 jump %ENTRY_CODE(Sp(0));
             }
         }
-#ifndef REG_R1
-        /* 
-         * Readjust stack in unregisterised mode if we didn't raise an
-         * exception, see above
-         */
-        else {
-            Sp_adj(-1);
-        }
-#endif
     }
 
-#ifdef REG_R1
     Sp_adj(1);
     jump %ENTRY_CODE(Sp(0));
-#else
-    Sp(1) = Sp(0);
-    Sp_adj(1);
-    jump %ENTRY_CODE(Sp(1));
-#endif
 }
 
 INFO_TABLE_RET( stg_blockAsyncExceptionszh_ret, RET_SMALL )
@@ -120,14 +92,8 @@ INFO_TABLE_RET( stg_blockAsyncExceptionszh_ret, RET_SMALL )
     StgTSO_flags(CurrentTSO) = 
 	StgTSO_flags(CurrentTSO) | TSO_BLOCKEX::I32 | TSO_INTERRUPTIBLE::I32;
 
-#ifdef REG_R1
     Sp_adj(1);
     jump %ENTRY_CODE(Sp(0));
-#else
-    Sp(1) = Sp(0);
-    Sp_adj(1);
-    jump %ENTRY_CODE(Sp(1));
-#endif
 }
 
 blockAsyncExceptionszh_fast
@@ -200,6 +166,15 @@ unblockAsyncExceptionszh_fast
     jump stg_ap_v_fast;
 }
 
+asyncExceptionsBlockedzh_fast
+{
+    /* args: none */
+    if ((TO_W_(StgTSO_flags(CurrentTSO)) & TSO_BLOCKEX) != 0) {
+        RET_N(1);
+    } else {
+        RET_N(0);
+    }
+}
 
 killThreadzh_fast
 {
@@ -212,6 +187,7 @@ killThreadzh_fast
     target = R1;
     exception = R2;
     
+    /* Needs 3 words because throwToSingleThreaded uses some stack */
     STK_CHK_GEN( WDS(3), R1_PTR & R2_PTR, killThreadzh_fast);
 
     /* 
@@ -222,7 +198,7 @@ killThreadzh_fast
      */
   loop:
     if (StgTSO_what_next(target) == ThreadRelocated::I16) {
-        target = StgTSO_link(target);
+        target = StgTSO__link(target);
         goto loop;
     }
     if (target == CurrentTSO) {
@@ -240,8 +216,8 @@ killThreadzh_fast
     } else {
 	W_ out;
 	W_ retcode;
-	out = BaseReg + OFFSET_StgRegTable_rmp_tmp_w;
-	
+	out = Sp - WDS(1); /* ok to re-use stack space here */
+
 	(retcode) = foreign "C" throwTo(MyCapability() "ptr",
 				      CurrentTSO "ptr",
 				      target "ptr",
@@ -267,11 +243,7 @@ killThreadzh_fast
    Catch frames
    -------------------------------------------------------------------------- */
 
-#ifdef REG_R1
 #define SP_OFF 0
-#else
-#define SP_OFF 1
-#endif
 
 /* Catch frames are very similar to update frames, but when entering
  * one we just pop the frame off the stack and perform the correct
@@ -282,21 +254,11 @@ INFO_TABLE_RET(stg_catch_frame, CATCH_FRAME,
 #if defined(PROFILING)
   W_ unused1, W_ unused2,
 #endif
-  W_ unused3, "ptr" W_ unused4)
-#ifdef REG_R1
-   {
-      Sp = Sp + SIZEOF_StgCatchFrame;
-      jump %ENTRY_CODE(Sp(SP_OFF));
-   }
-#else
+  W_ unused3, P_ unused4)
    {
-      W_ rval;
-      rval = Sp(0);
       Sp = Sp + SIZEOF_StgCatchFrame;
-      Sp(0) = rval;
       jump %ENTRY_CODE(Sp(SP_OFF));
    }
-#endif
 
 /* -----------------------------------------------------------------------------
  * The catch infotable
@@ -354,7 +316,7 @@ section "data" {
   no_break_on_exception: W_[1];
 }
 
-INFO_TABLE_RET(stg_raise_ret, RET_SMALL, "ptr" W_ arg1)
+INFO_TABLE_RET(stg_raise_ret, RET_SMALL, P_ arg1)
 {
   R1 = Sp(1);
   Sp = Sp + WDS(2);