/* -----------------------------------------------------------------------------
- * $Id: PrimOps.hc,v 1.96 2002/04/23 09:56:29 stolz Exp $
+ * $Id: PrimOps.hc,v 1.102 2002/10/22 11:01:19 simonmar Exp $
*
* (c) The GHC Team, 1998-2000
*
#include "Itimer.h"
#include "Prelude.h"
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#include <stdlib.h>
+
/* ** temporary **
classes CCallable and CReturnable don't really exist, but the
#define BYTES_TO_STGWORDS(n) ((n) + sizeof(W_) - 1)/sizeof(W_)
-FN_(newByteArrayzh_fast) \
- { \
- W_ size, stuff_size, n; \
- StgArrWords* p; \
- FB_ \
- MAYBE_GC(NO_PTRS,newByteArrayzh_fast); \
- n = R1.w; \
- stuff_size = BYTES_TO_STGWORDS(n); \
- size = sizeofW(StgArrWords)+ stuff_size; \
- p = (StgArrWords *)RET_STGCALL1(P_,allocate,size); \
- TICK_ALLOC_PRIM(sizeofW(StgArrWords),stuff_size,0); \
- SET_HDR(p, &stg_ARR_WORDS_info, CCCS); \
- p->words = stuff_size; \
- TICK_RET_UNBOXED_TUP(1) \
- RET_P(p); \
- FE_ \
+FN_(newByteArrayzh_fast)
+ {
+ W_ size, stuff_size, n;
+ StgArrWords* p;
+ FB_
+ MAYBE_GC(NO_PTRS,newByteArrayzh_fast);
+ n = R1.w;
+ stuff_size = BYTES_TO_STGWORDS(n);
+ size = sizeofW(StgArrWords)+ stuff_size;
+ p = (StgArrWords *)RET_STGCALL1(P_,allocate,size);
+ TICK_ALLOC_PRIM(sizeofW(StgArrWords),stuff_size,0);
+ SET_HDR(p, &stg_ARR_WORDS_info, CCCS);
+ p->words = stuff_size;
+ TICK_RET_UNBOXED_TUP(1)
+ RET_P(p);
+ FE_
}
-FN_(newPinnedByteArrayzh_fast) \
- { \
- W_ size, stuff_size, n; \
- StgArrWords* p; \
- FB_ \
- MAYBE_GC(NO_PTRS,newPinnedByteArrayzh_fast); \
- n = R1.w; \
- stuff_size = BYTES_TO_STGWORDS(n); \
- size = sizeofW(StgArrWords)+ stuff_size; \
- p = (StgArrWords *)RET_STGCALL1(P_,allocatePinned,size); \
- TICK_ALLOC_PRIM(sizeofW(StgArrWords),stuff_size,0); \
- SET_HDR(p, &stg_ARR_WORDS_info, CCCS); \
- p->words = stuff_size; \
- TICK_RET_UNBOXED_TUP(1) \
- RET_P(p); \
- FE_ \
+FN_(newPinnedByteArrayzh_fast)
+ {
+ W_ size, stuff_size, n;
+ StgArrWords* p;
+ FB_
+ MAYBE_GC(NO_PTRS,newPinnedByteArrayzh_fast);
+ n = R1.w;
+ stuff_size = BYTES_TO_STGWORDS(n);
+
+ // We want an 8-byte aligned array. allocatePinned() gives us
+ // 8-byte aligned memory by default, but we want to align the
+ // *goods* inside the ArrWords object, so we have to check the
+ // size of the ArrWords header and adjust our size accordingly.
+ size = sizeofW(StgArrWords)+ stuff_size;
+ if ((sizeof(StgArrWords) & 7) != 0) {
+ size++;
+ }
+
+ p = (StgArrWords *)RET_STGCALL1(P_,allocatePinned,size);
+ TICK_ALLOC_PRIM(sizeofW(StgArrWords),stuff_size,0);
+
+ // Again, if the ArrWords header isn't a multiple of 8 bytes, we
+ // have to push the object forward one word so that the goods
+ // fall on an 8-byte boundary.
+ if ((sizeof(StgArrWords) & 7) != 0) {
+ ((StgPtr)p)++;
+ }
+
+ SET_HDR(p, &stg_ARR_WORDS_info, CCCS);
+ p->words = stuff_size;
+ TICK_RET_UNBOXED_TUP(1)
+ RET_P(p);
+ FE_
}
FN_(newArrayzh_fast)
FE_
}
+FN_(atomicModifyMutVarzh_fast)
+{
+ StgMutVar* mv;
+ StgClosure *z, *x, *y, *r;
+ FB_
+ /* Args: R1.p :: MutVar#, R2.p :: a -> (a,b) */
+
+ /* If x is the current contents of the MutVar#, then
+ We want to make the new contents point to
+
+ (sel_0 (f x))
+
+ and the return value is
+
+ (sel_1 (f x))
+
+ obviously we can share (f x).
+
+ z = [stg_ap_2 f x] (max (HS + 2) MIN_UPD_SIZE)
+ y = [stg_sel_0 z] (max (HS + 1) MIN_UPD_SIZE)
+ r = [stg_sel_1 z] (max (HS + 1) MIN_UPD_SIZE)
+ */
+
+#define THUNK_SIZE(n) (sizeofW(StgHeader) + stg_max((n), MIN_UPD_SIZE))
+#define SIZE (THUNK_SIZE(2) + THUNK_SIZE(1) + THUNK_SIZE(1))
+
+ HP_CHK_GEN_TICKY(SIZE, R1_PTR|R2_PTR, atomicModifyMutVarzh_fast,);
+ CCS_ALLOC(CCCS,SIZE);
+
+ x = ((StgMutVar *)R1.cl)->var;
+
+ TICK_ALLOC_UP_THK(2,0); // XXX
+ z = (StgClosure *) Hp - THUNK_SIZE(2) + 1;
+ SET_HDR(z, &stg_ap_2_upd_info, CCCS);
+ z->payload[0] = R2.cl;
+ z->payload[1] = x;
+
+ TICK_ALLOC_UP_THK(1,1); // XXX
+ y = (StgClosure *) (StgPtr)z - THUNK_SIZE(1);
+ SET_HDR(y, &stg_sel_0_upd_info, CCCS);
+ y->payload[0] = z;
+
+ ((StgMutVar *)R1.cl)->var = y;
+
+ TICK_ALLOC_UP_THK(1,1); // XXX
+ r = (StgClosure *) (StgPtr)y - THUNK_SIZE(1);
+ SET_HDR(r, &stg_sel_1_upd_info, CCCS);
+ r->payload[0] = z;
+
+ RET_P(r);
+ JMP_(ENTRY_CODE(Sp[0]));
+ FE_
+}
+
/* -----------------------------------------------------------------------------
Foreign Object Primitives
-------------------------------------------------------------------------- */
FN_(labelThreadzh_fast)
{
FB_
- /* args: R1.p = Addr# */
+ /* args:
+ R1.p = ThreadId#
+ R2.p = Addr# */
#ifdef DEBUG
- STGCALL2(labelThread,CurrentTSO,(char *)R1.p);
+ STGCALL2(labelThread,R1.p,(char *)R2.p);
#endif
JMP_(ENTRY_CODE(Sp[0]));
FE_
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