Support for 64-bit architectures: generic support

- Introduce Archi.ptr64 parameter.
- Define module Ptrofs of integers as wide as a pointer (64 if Archi.ptr64, 32 otherwise).
- Use Ptrofs.int as the offset type for Vptr values and anywhere pointer offsets are manipulated.
- Modify Val operations that handle pointers (e.g. Val.add, Val.sub, Val.cmpu) so that in 64-bit pointer mode it is the "long" operation (e.g. Val.addl, Val.subl, Val.cmplu) that handles pointers.
- Update the memory model accordingly.
- Modify C operations that handle pointers (e.g. addition, subtraction, comparisons) accordingly.
- Make it possible to turn off the splitting of 64-bit integers into pairs of 32-bit integers.
- Update the compiler front-end and back-end accordingly.

1 files changed, 3 insertions, 3 deletions

diff --git a/cfrontend/Cminorgen.v b/cfrontend/Cminorgen.v
index b9a28ee1..5017fc8e 100644
--- a/cfrontend/Cminorgen.v
+++ b/cfrontend/Cminorgen.v
@@ -47,8 +47,8 @@ Definition compilenv := PTree.t Z.
 
 Definition var_addr (cenv: compilenv) (id: ident): expr :=
   match PTree.get id cenv with
-  | Some ofs => Econst (Oaddrstack (Int.repr ofs))
-  | None     => Econst (Oaddrsymbol id Int.zero)
+  | Some ofs => Econst (Oaddrstack (Ptrofs.repr ofs))
+  | None     => Econst (Oaddrsymbol id Ptrofs.zero)
   end.
 
 (** * Translation of expressions and statements. *)
@@ -269,7 +269,7 @@ Definition transl_funbody
 
 Definition transl_function (f: Csharpminor.function): res function :=
   let (cenv, stacksize) := build_compilenv f in
-  if zle stacksize Int.max_unsigned
+  if zle stacksize Ptrofs.max_unsigned
   then transl_funbody cenv stacksize f
   else Error(msg "Cminorgen: too many local variables, stack size exceeded").