diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lem_interp/run_interp.ml | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/lem_interp/run_interp.ml b/src/lem_interp/run_interp.ml index 2440f60f..98b8e6fe 100644 --- a/src/lem_interp/run_interp.ml +++ b/src/lem_interp/run_interp.ml @@ -94,6 +94,14 @@ module Mem = struct | 0 -> compare_big_int v1 v2 | n -> n end) + (* debugging memory accesses *) + let add (n, idx) v m = + eprintf "%s[%s] <- %s\n" (id_to_string n) (string_of_big_int idx) (val_to_string v); + add (n, idx) v m + let find (n, idx) m = + let v = find (n, idx) m in + eprintf "%s[%s] -> %s\n" (id_to_string n) (string_of_big_int idx) (val_to_string v); + v end ;; let slice v = function @@ -120,7 +128,7 @@ let perform_action ((reg, mem) as env) = function | Write_mem (id, V_lit(L_num n), None, value) -> V_lit L_unit, (reg, Mem.add (id, n) value mem) (* multi-byte accesses to memory *) - (* XXX this doesn't deal with endianess at all, and it seems broken in tests *) + (* XXX this doesn't deal with endianess at all *) | Read_mem (id, V_tuple [V_lit(L_num n); V_lit(L_num size)], sub) -> let rec fetch k acc = if eq_big_int k size then slice acc sub else @@ -131,14 +139,16 @@ let perform_action ((reg, mem) as env) = function (* XXX no support for multi-byte slice write at the moment - not hard to add, * but we need a function basic read/write first since slice access involves * read, fupdate, write. *) - | Write_mem (id, V_tuple [V_lit(L_num n); V_lit(L_num size)], None, value) -> + | Write_mem (id, V_tuple [V_lit(L_num n); V_lit(L_num size)], None, V_vector (m, inc, vs)) -> + (* normalize input vector so that it is indexed from 0 - for slices *) + let value = V_vector (zero_big_int, inc, vs) in (* assumes smallest unit of memory is 8 bit *) let byte_size = 8 in let rec update k mem = if eq_big_int k size then mem else - let slice = slice_vector value - (mult_int_big_int byte_size k) - (mult_int_big_int byte_size (succ_big_int k)) in + let n1 = mult_int_big_int byte_size k in + let n2 = sub_big_int (mult_int_big_int byte_size (succ_big_int k)) (big_int_of_int 1) in + let slice = slice_vector value n1 n2 in let mem' = Mem.add (id, add_big_int n k) slice mem in update (succ_big_int k) mem' in V_lit L_unit, (reg, update zero_big_int mem) |