Add support for more assembly

I want to be able to handle the output of gcc/clang on our C code.

Right now, I have added support for parsing the assembly output.
Equivalence checking is still to come.

src/Assembly/Equality.v

@@ -32,11 +32,39 @@ Declare Scope REG_scope.
 Delimit Scope REG_scope with REG.
 Bind Scope REG_scope with REG.
 
+
+Definition REG_beq (r1 r2 : REG) : bool :=
+  (prod_beq _ _ (prod_beq _ _ N.eqb N.eqb) N.eqb)
+    (index_and_shift_and_bitcount_of_reg r1) (index_and_shift_and_bitcount_of_reg r2).
+
+Lemma REG_dec_lb : forall r1 r2 : REG, r1 = r2 -> REG_beq r1 r2 = true.
+Proof.
+  intros r1 r2 H.
+  subst r2; destruct r1.
+  all: reflexivity.
+Defined.
+
+Lemma REG_dec_bl : forall r1 r2 : REG, REG_beq r1 r2 = true -> r1 = r2.
+Proof.
+  cbv [REG_beq].
+  intros r1 r2 H.
+  rewrite <- (reg_of_index_and_shift_and_bitcount_of_index_and_shift_and_bitcount_of_reg r1), <- (reg_of_index_and_shift_and_bitcount_of_index_and_shift_and_bitcount_of_reg r2).
+  reflect_hyps.
+  rewrite H.
+  reflexivity.
+Defined.
+
+Definition REG_eq_dec (x y : REG) : {x = y} + {x <> y} :=
+  (if REG_beq x y as b return (REG_beq x y = b -> _)
+    then fun pf => left (REG_dec_bl x y pf)
+    else fun pf => right (fun pf' => diff_false_true (eq_trans (eq_sym pf) (REG_dec_lb x y pf'))))
+     eq_refl.
+
 Infix "=?" := REG_beq : REG_scope.
 
 Global Instance REG_beq_spec : reflect_rel (@eq REG) REG_beq | 10
-  := reflect_of_beq internal_REG_dec_bl internal_REG_dec_lb.
-Definition REG_beq_eq x y : (x =? y)%REG = true <-> x = y := conj (@internal_REG_dec_bl _ _) (@internal_REG_dec_lb _ _).
+  := reflect_of_beq REG_dec_bl REG_dec_lb.
+Definition REG_beq_eq x y : (x =? y)%REG = true <-> x = y := conj (@REG_dec_bl _ _) (@REG_dec_lb _ _).
 Lemma REG_beq_neq x y : (x =? y)%REG = false <-> x <> y.
 Proof. rewrite <- REG_beq_eq; destruct (x =? y)%REG; intuition congruence. Qed.
 Global Instance REG_beq_compat : Proper (eq ==> eq ==> eq) REG_beq | 10.
@@ -108,6 +136,7 @@ Bind Scope MEM_scope with MEM.
 
 Definition MEM_beq (x y : MEM) : bool
   := ((option_beq AccessSize_beq x.(mem_bits_access_size) y.(mem_bits_access_size))
+      && option_beq String.eqb x.(mem_constant_location_label) y.(mem_constant_location_label)
       && option_beq String.eqb x.(mem_base_label) y.(mem_base_label)
       && (option_beq REG_beq x.(mem_base_reg) y.(mem_base_reg))
       && (option_beq (prod_beq _ _ Z.eqb REG_beq) x.(mem_scale_reg) y.(mem_scale_reg))

src/Assembly/Parse.v

@@ -100,16 +100,20 @@ Definition parse_label : ParserAction string
        (fun '(char, ls) => string_of_list_ascii (char :: ls))
        (([a-zA-Z] || parse_any_ascii "._?$") ;;
         (([a-zA-Z] || parse_any_ascii "0123456789_$#@~.?")* )).
+Definition parse_non_access_size_label : ParserAction string
+:= parse_lookahead_not parse_AccessSize ;;R parse_label.
 
 Definition parse_MEM : ParserAction MEM
   := parse_map
-       (fun '(access_size, (br (*base reg*), sr (*scale reg, including z *), offset, base_label))
+       (fun '(access_size, (constant_location_label, (br (*base reg*), sr (*scale reg, including z *), offset, base_label)))
         => {| mem_bits_access_size := access_size:option AccessSize
            ; mem_base_reg := br:option REG
+           ; mem_constant_location_label := constant_location_label:option string
            ; mem_base_label := base_label
            ; mem_scale_reg := sr:option (Z * REG)
            ; mem_offset := offset:option Z |})
        (((strip_whitespace_after parse_AccessSize)?) ;;
+        (parse_non_access_size_label?) ;;
         (parse_option_list_map
            (fun '(offset, vars)
             => (vars <-- List.map (fun '(c, (v, e), vs) => match vs, e with [], 1%Z => Some (c, v) | _, _ => None end) vars;
@@ -160,7 +164,8 @@ Definition parse_OpCode_list : list (string * OpCode)
   := Eval vm_compute in
       List.map
         (fun r => (show r, r))
-        (list_all OpCode).
+        (list_all OpCode)
+      ++ [(".quad", dq); (".word", dw); (".byte", db)].
 
 Definition parse_OpCode : ParserAction OpCode
   := parse_strs_case_insensitive parse_OpCode_list.
@@ -254,11 +259,23 @@ Global Instance show_lvl_MEM : ShowLevel MEM
   := fun m
      => (match m.(mem_bits_access_size) with
          | Some n
-           => show_lvl_app (fun 'tt => if n =? 8 then "byte" else if n =? 64 then "QWORD PTR" else "BAD SIZE")%N (* TODO: Fix casing and stuff *)
+           => show_lvl_app (fun 'tt => if n =? 8 then "byte"
+                                      else if n =? 16 then "word"
+                                      else if n =? 32 then "dword"
+                                      else if n =? 64 then "QWORD PTR"
+                                      else if n =? 128 then "XMMWORD PTR"
+                                      else if n =? 256 then "YMMWORD PTR"
+                                      else if n =? 512 then "ZMMWORD PTR"
+                                      else "BAD SIZE")%N (* TODO: Fix casing and stuff *)
          | None => show_lvl
          end)
           (fun 'tt
-           => let reg_part
+           => let label_part :=
+                match m.(mem_constant_location_label) with
+                | None => ""
+                | Some l => l
+                end in
+              let reg_part
                 := (match m.(mem_base_reg), m.(mem_scale_reg) with
                     | (*"[Reg]"          *) Some br, None         => show_REG br
                     | (*"[Reg + Z * Reg]"*) Some br, Some (z, sr) => show_REG br  ++ " + " ++  Decimal.show_Z z  ++ " * " ++ show_REG sr (*only matching '+' here, because there cannot be a negative scale. *)
@@ -275,7 +292,7 @@ Global Instance show_lvl_MEM : ShowLevel MEM
                                  then "0x08 * " ++ Decimal.show_Z (offset / 8)
                                  else Hex.show_Z offset)
                     end%Z) in
-              "[" ++ match m.(mem_base_label) with
+              label_part ++ "[" ++ match m.(mem_base_label) with
                      | None => reg_part ++ offset_part
                      | Some l => "((" ++ l ++ offset_part ++ "))"
                      end