Add parameterization support for bitfields.

This supports the following syntax:

  type xlen : Int = 64
  type ylen : Int = 1

  type xlenbits = bits(xlen)

  bitfield Mstatus : xlenbits = {
    SD  : xlen - ylen,
    SXL : xlen - ylen - 1 .. xlen - ylen - 3
  }

1 files changed, 42 insertions, 0 deletions

diff --git a/test/typecheck/pass/bitvector_param.sail b/test/typecheck/pass/bitvector_param.sail
new file mode 100644
index 00000000..ffebeb6e
--- /dev/null
+++ b/test/typecheck/pass/bitvector_param.sail
@@ -0,0 +1,42 @@
+/* from prelude */
+default Order dec
+type bits ('n : Int) = vector('n, dec, bit)
+
+val vector_subrange = {
+  ocaml: "subrange",
+  lem: "subrange_vec_dec",
+  c: "vector_subrange",
+  coq: "subrange_vec_dec"
+} : forall ('n : Int) ('m : Int) ('o : Int), 0 <= 'o <= 'm < 'n.
+  (bits('n), atom('m), atom('o)) -> bits('m - 'o + 1)
+
+val vector_update_subrange_dec = {ocaml: "update_subrange", c: "vector_update_subrange", lem: "update_subrange_vec_dec", coq: "update_subrange_vec_dec"} : forall 'n 'm 'o.
+  (bits('n), atom('m), atom('o), bits('m - ('o - 1))) -> bits('n)
+
+val vector_update_subrange_inc = {ocaml: "update_subrange", lem: "update_subrange_vec_inc"} : forall 'n 'm 'o.
+  (vector('n, inc, bit), atom('m), atom('o), vector('o - ('m - 1), inc, bit)) -> vector('n, inc, bit)
+
+overload vector_update_subrange = {vector_update_subrange_dec, vector_update_subrange_inc}
+
+val bitvector_concat = {c: "append", ocaml: "append", lem: "concat_vec", coq: "concat_vec"} : forall ('n : Int) ('m : Int).
+  (bits('n), bits('m)) -> bits('n + 'm)
+
+val vector_concat = {ocaml: "append", lem: "append_list"} : forall ('n : Int) ('m : Int) ('a : Type).
+  (vector('n, dec, 'a), vector('m, dec, 'a)) -> vector('n + 'm, dec, 'a)
+
+overload append = {bitvector_concat, vector_concat}
+
+val "reg_deref" : forall ('a : Type). register('a) -> 'a effect {rreg}
+/* sneaky deref with no effect necessary for bitfield writes */
+val _reg_deref = "reg_deref" : forall ('a : Type). register('a) -> 'a
+
+type xlen : Int = 64
+type ylen : Int = 1
+
+type xlenbits = bits(xlen)
+
+bitfield Mstatus : xlenbits = {
+  SD  : xlen - ylen,
+  SXL : xlen - ylen - 1 .. xlen - ylen - 3
+}
+register mstatus : Mstatus