Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 80 insertions, 0 deletions

diff --git a/rts/AutoApply.h b/rts/AutoApply.h
new file mode 100644
index 0000000000..bbec1224ff
--- /dev/null
+++ b/rts/AutoApply.h
@@ -0,0 +1,80 @@
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The University of Glasgow 2002-2004
+ *
+ * Helper bits for the generic apply code (AutoApply.hc)
+ *
+ * -------------------------------------------------------------------------- */
+
+#ifndef AUTOAPPLY_H
+#define AUTOAPPLY_H
+
+// Build a new PAP: function is in R1
+// ret addr and m arguments taking up n words are on the stack.
+// NB. x is a dummy argument attached to the 'for' label so that
+// BUILD_PAP can be used multiple times in the same function.
+#define BUILD_PAP(m,n,f,x)				\
+    W_ pap;						\
+    W_ size;						\
+    W_ i;						\
+    size = SIZEOF_StgPAP + WDS(n);			\
+    HP_CHK_NP_ASSIGN_SP0(size,f);			\
+    TICK_ALLOC_HEAP_NOCTR(BYTES_TO_WDS(size));		\
+    TICK_ALLOC_PAP(n+1 /* +1 for the FUN */, 0);	\
+    pap = Hp + WDS(1) - size;				\
+    SET_HDR(pap, stg_PAP_info, W_[CCCS]);		\
+    StgPAP_arity(pap) = HALF_W_(arity - m);		\
+    StgPAP_fun(pap)   = R1;				\
+    StgPAP_n_args(pap) = HALF_W_(n);			\
+    i = 0;						\
+  for##x:						\
+    if (i < n) {					\
+	StgPAP_payload(pap,i) = Sp(1+i);		\
+	i = i + 1;					\
+	goto for##x;					\
+    }							\
+    R1 = pap;						\
+    Sp_adj(1 + n);					\
+    jump %ENTRY_CODE(Sp(0));
+
+// Copy the old PAP, build a new one with the extra arg(s)
+// ret addr and m arguments taking up n words are on the stack.
+// NB. x is a dummy argument attached to the 'for' label so that
+// BUILD_PAP can be used multiple times in the same function.
+#define NEW_PAP(m,n,f,x)					\
+     W_ pap;							\
+     W_ new_pap;						\
+     W_ size;							\
+     W_ i;							\
+     pap = R1;							\
+     size = SIZEOF_StgPAP + WDS(TO_W_(StgPAP_n_args(pap))) + WDS(n);	\
+     HP_CHK_NP_ASSIGN_SP0(size,f);				\
+     TICK_ALLOC_HEAP_NOCTR(BYTES_TO_WDS(size));			\
+     TICK_ALLOC_PAP(n+1 /* +1 for the FUN */, 0);		\
+     new_pap = Hp + WDS(1) - size;				\
+     SET_HDR(new_pap, stg_PAP_info, W_[CCCS]);			\
+     StgPAP_arity(new_pap) = HALF_W_(arity - m);		\
+     W_ n_args;							\
+     n_args = TO_W_(StgPAP_n_args(pap));			\
+     StgPAP_n_args(new_pap) = HALF_W_(n_args + n);		\
+     StgPAP_fun(new_pap) = StgPAP_fun(pap);			\
+     i = 0;							\
+   for1##x:							\
+     if (i < n_args) {						\
+         StgPAP_payload(new_pap,i) = StgPAP_payload(pap,i);	\
+	 i = i + 1;						\
+	 goto for1##x;						\
+     }								\
+     i = 0;							\
+   for2##x:							\
+     if (i < n) {						\
+	 StgPAP_payload(new_pap,n_args+i) = Sp(1+i);		\
+         i = i + 1;						\
+         goto for2##x;						\
+     }								\
+     R1 = new_pap;						\
+     Sp_adj(n+1);						\
+     jump %ENTRY_CODE(Sp(0));
+
+#endif /* APPLY_H */
+