/* -----------------------------------------------------------------------------
- * $Id: StgMacros.h,v 1.50 2002/12/11 15:36:39 simonmar Exp $
+ * $Id: StgMacros.h,v 1.51 2003/04/22 16:25:08 simonmar Exp $
*
* (c) The GHC Team, 1998-1999
*
The stack frame layout for a RET_DYN is like this:
- some pointers
- some nonpointers
- DblReg1-2
- FltReg1-4
- R1-8
- return address
- liveness mask
- stg_gen_chk_info
+ some pointers |-- GET_PTRS(liveness) words
+ some nonpointers |-- GET_NONPTRS(liveness) words
+
+ L1 \
+ D1-2 |-- RET_DYN_NONPTR_REGS_SIZE words
+ F1-4 /
+
+ R1-8 |-- RET_DYN_BITMAP_SIZE words
+
+ return address \
+ liveness mask |-- StgRetDyn structure
+ stg_gen_chk_info /
we assume that the size of a double is always 2 pointers (wasting a
word when it is only one pointer, but avoiding lots of #ifdefs).
// VERY MAGIC CONSTANTS!
// must agree with code in HeapStackCheck.c, stg_gen_chk
//
-#define ALL_NON_PTRS 0xffff
-#define RET_DYN_SIZE 16
+#define RET_DYN_BITMAP_SIZE 8
+#define RET_DYN_NONPTR_REGS_SIZE 10
+#define ALL_NON_PTRS 0xff
#define LIVENESS_MASK(ptr_regs) (ALL_NON_PTRS ^ (ptr_regs))