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Dmitry Boulytchev 2018-03-11 15:41:35 +03:00
commit 28496909df
10 changed files with 337 additions and 65 deletions
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109
src/X86.ml
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@ -104,18 +104,20 @@ let compile env code =
let s, env' = env#pop in
(env', [Push s; Call "Lwrite"; Pop eax])
| CONST n ->
env#push (L n), []
(*
(*env#push (L n), []*)
let s, env' = env#allocate in
(env', [Mov (L n, s)])
*)
| LD x ->
(* (env#global x)#push (M x), []*)
let s, env' = (env#global x)#allocate in
env',
(match s with
| S _ | M _ -> [Mov (M (env'#loc x), eax); Mov (eax, s)]
| _ -> [Mov (M (env'#loc x), s)]
)
| ST x ->
let s, env' = (env#global x)#pop in
env',
@ -124,64 +126,68 @@ let compile env code =
| _ -> [Mov (s, M (env'#loc x))]
)
| BINOP op ->
let x, y, env' = env#pop2 in
let env' = env'#push y in
env',
(match op with
| "/" | "%" ->
[Mov (y, eax);
Cltd;
IDiv x;
Mov ((match op with "/" -> eax | _ -> edx), y)
]
| "<" | "<=" | "==" | "!=" | ">=" | ">" ->
(match x with
| M _ | S _ ->
let x, y, env' = env#pop2 in
env'#push y,
(*
let y, env', c = match y with L _ -> let z, env' = env'#allocate in z, env', [Mov (y, z)] | _ -> y, env'#push y, [] in
env',
c @
*)
(match op with
| "/" | "%" ->
[Mov (y, eax);
Cltd;
IDiv x;
Mov ((match op with "/" -> eax | _ -> edx), y)
]
| "<" | "<=" | "==" | "!=" | ">=" | ">" ->
(match x with
| M _ | S _ ->
[Binop ("^", eax, eax);
Mov (x, edx);
Binop ("cmp", edx, y);
Set (suffix op, "%al");
Mov (eax, y)
]
| _ ->
| _ ->
[Binop ("^" , eax, eax);
Binop ("cmp", x, y);
Set (suffix op, "%al");
Mov (eax, y)
]
)
| "*" ->
if on_stack x && on_stack y
then [Mov (y, eax); Binop (op, x, eax); Mov (eax, y)]
else [Binop (op, x, y)]
| "&&" ->
[Mov (x, eax);
Binop (op, x, eax);
Mov (L 0, eax);
Set ("ne", "%al");
Mov (y, edx);
Binop (op, y, edx);
Mov (L 0, edx);
Set ("ne", "%dl");
Binop (op, edx, eax);
Set ("ne", "%al");
Mov (eax, y)
]
| "!!" ->
[Mov (y, eax);
Binop (op, x, eax);
Mov (L 0, eax);
Set ("ne", "%al");
Mov (eax, y)
]
| _ ->
if on_stack x && on_stack y
then [Mov (x, eax); Binop (op, eax, y)]
else [Binop (op, x, y)]
)
)
| "*" ->
if on_stack x && on_stack y
then [Mov (y, eax); Binop (op, x, eax); Mov (eax, y)]
else [Binop (op, x, y)]
| "&&" ->
[Mov (x, eax);
Binop (op, x, eax);
Mov (L 0, eax);
Set ("ne", "%al");
Mov (y, edx);
Binop (op, y, edx);
Mov (L 0, edx);
Set ("ne", "%dl");
Binop (op, edx, eax);
Set ("ne", "%al");
Mov (eax, y)
]
| "!!" ->
[Mov (y, eax);
Binop (op, x, eax);
Mov (L 0, eax);
Set ("ne", "%al");
Mov (eax, y)
]
| _ ->
if on_stack x && on_stack y
then [Mov (x, eax); Binop (op, eax, y)]
else [Binop (op, x, y)]
)
in
let env'', code'' = compile' env' scode' in
env'', code' @ code''
@ -208,6 +214,7 @@ class env =
| [] -> ebx , 0
| (S n)::_ -> S (n+1) , n+1
| (R n)::_ when n < num_of_regs -> R (n+1) , stack_slots
| (M _)::s -> allocate' s
| _ -> S 0 , 1
in
allocate' stack
@ -218,7 +225,7 @@ class env =
method push y = {< stack = y::stack >}
(* pops one operand from the symbolic stack *)
method pop = let x::stack' = stack in x, {< stack = stack' >}
method pop = let x::stack' = stack in x, {< stack = stack' >}
(* pops two operands from the symbolic stack *)
method pop2 = let x::y::stack' = stack in x, y, {< stack = stack' >}