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(* a register containing nat numbers *)
register nat dummy_reg
(* a function to read from memory; wmem serves no purpose currently,
memory-writing functions are figured out syntactically. *)
val extern nat -> nat effect { wmem , rmem } MEM
val extern nat -> nat effect { wmem , rmem } MEM_GPU
val extern ( nat * nat ) -> (bit[8]) effect { wmem , rmem } MEM_SIZE
val extern nat -> (bit[8]) effect { wmem , rmem } MEM_WORD
(* XXX types are wrong *)
val extern forall Type 'a . 'a -> nat effect pure to_num_inc = "to_num_inc"
val extern forall Type 'a . 'a -> nat effect pure to_num_dec = "to_num_dec"
val extern forall Type 'a . nat -> 'a effect pure to_vec_inc = "to_vec_inc"
val extern forall Type 'a . nat -> 'a effect pure to_vec_dec = "to_vec_dec"
function unit ignore(x) = ()
(* extern functions *)
val extern ( nat * nat ) -> nat effect pure add = "add"
val extern ( nat * nat ) -> nat effect pure (deinfix + ) = "add_infix" (* infix plus *)
function nat (deinfix * ) ( (nat) x, (nat) y ) = 42
function nat main _ = {
(* left-hand side function call = memory write *)
MEM(0) := 0;
(* memory read, thanks to effect { rmem} above *)
ignore(MEM(0));
(* register write, idem *)
dummy_reg := 1;
(* register read, thanks to register declaration *)
ignore(dummy_reg);
MEM_WORD(0) := 0b10101010;
(MEM_WORD(0))[3..4] := 0b10;
(* XXX this one is broken - I don't what it should do,
or even if we should accept it, but the current result
is to eat up one bit, ending up with a 7-bit word. *)
(MEM_WORD(0))[4..3] := 0b10;
ignore(MEM_WORD(0));
(* infix call *)
ignore(7 * 9);
(* Some more checks *)
MEM(1) := 2;
ignore(MEM(1));
MEM_GPU(0) := 3;
ignore(MEM_GPU(0));
MEM_SIZE(0,1) := 0b11110000;
ignore(MEM_SIZE(0,1));
MEM_SIZE(0,2) := 0b1111000010100000;
ignore(MEM_SIZE(0,2));
(* extern calls *)
ignore(3 + 39);
add(5, 37);
}
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