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generator.ml
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open Printf
open Helper
open Parser
open Analyzer
let appfmt buf fmt =
ksprintf (fun str -> Buffer.add_string buf (str ^ "\n")) fmt
let appstr buf str = Buffer.add_string buf (str ^ "\n")
let escape_string str =
let buf = Buffer.create (String.length str) in
let rec aux i =
if i < String.length str then (
( match str.[i] with
| '\n' -> Buffer.add_string buf "\\n"
| '\r' -> Buffer.add_string buf "\\r"
| '\t' -> Buffer.add_string buf "\\t"
| '\\' -> Buffer.add_string buf "\\\\"
| '"' -> Buffer.add_string buf "\\\""
| ch -> Buffer.add_char buf ch ) ;
aux (i + 1) )
in
aux 0 ; Buffer.contents buf
let make_label () = make_id ".L"
type gen_environment = {offset: int; varoffset: (string, int) Hashmap.t}
type ctype = CTyInt | CTyUnit | CTyPtr
type tail_recursive = Tail | NonTail
let rec generate (letfuncs, strings, typedefs, exps) =
let stack_size = ref 0 in
let new_offset env size =
let offset = env.offset - (8 * size) in
stack_size := max !stack_size (-offset) ;
offset
in
let records_idx = Hashtbl.create 16 in
let ctors_id = Hashtbl.create 16 in
List.iter
(function
| DefTypeAlias _ -> ()
| DefVariant (_, typename, ctornames) ->
List.iteri
(fun i (ctorname, _) -> Hashtbl.add ctors_id (typename, ctorname) i)
ctornames
| DefRecord (typename, fields) ->
List.iteri
(fun i (fieldname, _) ->
Hashtbl.add records_idx (typename, fieldname) i )
fields)
typedefs ;
let exps_id = Hashtbl.create 16 in
List.iter
(fun expname -> Hashtbl.add exps_id expname @@ Hashtbl.length exps_id)
exps ;
let reg_of_index idx =
[|"rax"; "rbx"; "rdi"; "rsi"; "rdx"; "rcx"; "r8"; "r9"; "r12"; "r13"|].(idx)
in
let tag_int reg = sprintf "lea %s, [%s + %s + 1]" reg reg reg in
let untag_int reg = sprintf "sar %s, 1" reg in
let tagged_int num = (num lsl 1) lor 1 in
let gen_call_with_aligned_rsp callee =
let buf = Buffer.create 128 in
let just_call_label = make_label () in
let exit_label = make_label () in
appstr buf "mov rax, rsp" ;
appstr buf "and rax, 0x0f" ;
appstr buf "cmp rax, 0" ;
appfmt buf "je %s" just_call_label ;
(* rsp is not 16-byte aligned BUT 8-byte aligned *)
appstr buf "sub rsp, 8" ;
appfmt buf "call %s" callee ;
appstr buf "add rsp, 8" ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" just_call_label ;
appfmt buf "call %s" callee ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
in
let save_rsp = "mov [rip + aqaml_current_rsp], rsp" in
let rec gen_alloc_block size color tag =
(* allocated block address is in rax *)
let buf = Buffer.create 128 in
appstr buf save_rsp ;
appfmt buf "mov rdi, %d" size ;
appfmt buf "mov rsi, %d" color ;
appfmt buf "mov rdx, %d" tag ;
appstr buf @@ gen_call_with_aligned_rsp "aqaml_alloc_block@PLT" ;
(* appstr buf "call aqaml_alloc_block@PLT" ; *)
Buffer.contents buf
in
let rec gen_assign_pattern env exp_label = function
| UnitValue | EmptyList -> gen_assign_pattern env exp_label @@ IntValue 0
| IntValue num ->
let buf = Buffer.create 128 in
let exit_label = make_label () in
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int num ;
appfmt buf "je %s" exit_label ;
appfmt buf "jmp %s" exp_label ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
| CharValue ch ->
gen_assign_pattern env exp_label @@ IntValue (Char.code ch)
| StringValue (id, str) ->
let buf = Buffer.create 128 in
appstr buf "pop rax" ;
appfmt buf "lea rbx, [rip + %s]" id ;
appstr buf "call aqaml_structural_equal" ;
appstr buf "cmp rax, 1" ;
appfmt buf "je %s" exp_label ;
Buffer.contents buf
| Var varname ->
let buf = Buffer.create 128 in
let offset = Hashmap.find varname env.varoffset in
appstr buf "pop rax" ;
appfmt buf "mov [rbp + %d], rax" offset ;
Buffer.contents buf
| Cons (car, cdr) ->
let buf = Buffer.create 128 in
appstr buf "pop rax" ;
appstr buf "cmp rax, 1" ;
appfmt buf "je %s" exp_label ;
appstr buf "push QWORD PTR [rax]" ;
appstr buf "push QWORD PTR [rax + 8]" ;
appstr buf @@ gen_assign_pattern env exp_label cdr ;
appstr buf @@ gen_assign_pattern env exp_label car ;
Buffer.contents buf
| TupleValue values ->
let buf = Buffer.create 128 in
appstr buf "pop rax" ;
List.iteri
(fun i _ -> appfmt buf "push QWORD PTR [rax + %d]" (i * 8))
values ;
List.iter
(fun x -> appstr buf @@ gen_assign_pattern env exp_label x)
(List.rev values) ;
Buffer.contents buf
| CtorApp (Some typename, ctorname, None) ->
gen_assign_pattern env exp_label
@@ IntValue
( try Hashtbl.find ctors_id (typename, ctorname)
with Not_found -> Hashtbl.find exps_id typename )
| CtorApp (Some typename, ctorname, Some arg) ->
let buf = Buffer.create 128 in
let id =
try Hashtbl.find ctors_id (typename, ctorname) with Not_found ->
Hashtbl.find exps_id typename
in
appfmt buf "pop rax" ;
appstr buf "mov rdi, rax" ;
appstr buf "and rax, 1" ;
appstr buf "cmp rax, 0" ;
appfmt buf "jne %s" exp_label ;
appstr buf "mov rax, [rdi - 8]" ;
appstr buf "and rax, 0xff" ;
appfmt buf "cmp rax, %d" id ;
appfmt buf "jne %s" exp_label ;
appstr buf "push [rdi]" ;
appstr buf @@ gen_assign_pattern env exp_label arg ;
Buffer.contents buf
| PtnAlias (ptn, Var varname) ->
let buf = Buffer.create 128 in
let offset = Hashmap.find varname env.varoffset in
appstr buf "pop rax" ;
appfmt buf "mov [rbp + %d], rax" offset ;
appstr buf "push rax" ;
appstr buf @@ gen_assign_pattern env exp_label ptn ;
Buffer.contents buf
| PtnOr (lhs, rhs) ->
let next_label = make_label () in
let exit_label = make_label () in
let saved_rsp_offset = new_offset env 1 in
let env = {env with offset= saved_rsp_offset} in
let buf = Buffer.create 128 in
appfmt buf "mov [rbp + %d], rsp" saved_rsp_offset ;
appstr buf "pop rax" ;
appstr buf "push rax" ;
appstr buf "push rax" ;
appstr buf @@ gen_assign_pattern env next_label lhs ;
appstr buf "pop rax" ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" next_label ;
appfmt buf "mov rsp, [rbp + %d]" saved_rsp_offset ;
appstr buf @@ gen_assign_pattern env exp_label rhs ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
| PtnRange (bg, ed) ->
let buf = Buffer.create 128 in
let exit0_label = make_label () in
let exit1_label = make_label () in
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int @@ Char.code bg ;
appfmt buf "jge %s" exit0_label ;
appfmt buf "jmp %s" exp_label ;
appfmt buf "%s:" exit0_label ;
appfmt buf "cmp rax, %d" @@ tagged_int @@ Char.code ed ;
appfmt buf "jle %s" exit1_label ;
appfmt buf "jmp %s" exp_label ;
appfmt buf "%s:" exit1_label ;
Buffer.contents buf
| _ -> raise Unexpected_ast
in
let rec gen_assign_pattern_or_raise env ptn =
let exp_label = make_label () in
let exit_label = make_label () in
let assign_code = gen_assign_pattern env exp_label ptn in
let buf = Buffer.create 256 in
appstr buf assign_code ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" exp_label ;
(* TODO: arguments of Match_failure *)
appstr buf "mov rax, 1" ;
appstr buf @@ gen_raise_exp_of "Stdlib.Match_failure" true ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
and gen_raise () =
let buf = Buffer.create 128 in
(* Raise. Thanks to:
* https://github.com/ocamllabs/ocaml-multicore/wiki/Native-code-notes *)
appstr buf "mov rsp, r14" ;
appstr buf "pop r14" ;
appstr buf "ret" ;
Buffer.contents buf
and gen_raise_exp_of expname has_arguments =
let buf = Buffer.create 128 in
appstr buf "/* raise */" ;
if not has_arguments then
appfmt buf "mov rax, %d" @@ tagged_int @@ Hashtbl.find exps_id expname
else (
(* Assume that the argument is stored in rax *)
appstr buf "mov rbx, rax" ;
appstr buf @@ gen_alloc_block 1 0 @@ Hashtbl.find exps_id expname ;
appstr buf "mov [rax], rbx" ) ;
appstr buf @@ gen_raise () ;
Buffer.contents buf
and gen_pattern_match_cases env cases istail exp_body =
(* Assume that the target value is in stack top *)
let buf = Buffer.create 128 in
let saved_rsp_offset = new_offset env 1 in
let env = {env with offset= saved_rsp_offset} in
appfmt buf "mov [rbp + %d], rsp" saved_rsp_offset ;
let exit_label = make_label () in
let exp_label =
List.fold_left
(fun this_label (ptn, whn, case) ->
let varnames = varnames_in_pattern ptn in
let offset = new_offset env @@ List.length varnames in
let env =
{ offset
; varoffset=
(let rec aux i varoffset = function
| varname :: varnames ->
aux (i + 1)
(Hashmap.add varname (env.offset - (i * 8)) varoffset)
varnames
| [] -> varoffset
in
aux 1 env.varoffset varnames) }
in
let next_label = make_label () in
appfmt buf "%s:" this_label ;
appfmt buf "mov rsp, [rbp + %d]" saved_rsp_offset ;
appstr buf "pop rax" ;
appstr buf "push rax" ;
appstr buf "push rax" ;
appstr buf @@ gen_assign_pattern env next_label ptn ;
( match whn with
| None -> ()
| Some expr ->
appstr buf @@ aux env (NonTail, expr) ;
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int 0 ;
appfmt buf "je %s" next_label ) ;
appstr buf "pop rax" ;
appstr buf @@ aux env (istail, case) ;
appfmt buf "jmp %s /* exit label */" exit_label ;
next_label )
(make_label ()) cases
in
appfmt buf "%s:" exp_label ;
appstr buf "/* match failed */" ;
appstr buf exp_body ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
and aux env = function
| _, Nope -> "push 0 /* dummy */"
| _, IntValue num -> sprintf "push %d" (tagged_int num)
| istail, CharValue ch -> aux env (istail, IntValue (Char.code ch))
| istail, (UnitValue | EmptyList) -> aux env (istail, IntValue 0)
| _, StringValue (id, _) -> sprintf "lea rax, [rip + %s]\npush rax" id
| _, Cons (car, cdr) ->
let buf = Buffer.create 128 in
appstr buf "/* Cons BEGIN */" ;
appstr buf @@ aux env (NonTail, cdr) ;
appstr buf @@ aux env (NonTail, car) ;
appstr buf @@ gen_alloc_block 2 0 0 ;
appstr buf "pop rdi /* car */" ;
appstr buf "mov [rax], rdi" ;
appstr buf "pop rdi /* cdr */" ;
appstr buf "mov [rax + 8], rdi" ;
appstr buf "push rax" ;
appstr buf "/* Cons END */" ;
Buffer.contents buf
| _, TupleValue values ->
let size = List.length values in
let buf = Buffer.create 128 in
appstr buf @@ "/* TupleValue BEGIN */" ;
List.iter
(fun x -> appstr buf @@ aux env (NonTail, x))
(List.rev values) ;
appstr buf @@ gen_alloc_block size 0 1 ;
List.iteri
(fun i _ -> appfmt buf "pop rdi\nmov [rax + %d], rdi" (i * 8))
values ;
appstr buf @@ "push rax" ;
appstr buf @@ "/* TupleValue END */" ;
Buffer.contents buf
| _, ArrayValue values ->
let size = List.length values in
let buf = Buffer.create 128 in
appstr buf @@ "/* ArrayValue BEGIN */" ;
List.iter
(fun x -> appstr buf @@ aux env (NonTail, x))
(List.rev values) ;
appstr buf @@ gen_alloc_block size 0 1 ;
List.iteri
(fun i _ -> appfmt buf "pop rdi\nmov [rax + %d], rdi" (i * 8))
values ;
appstr buf @@ "push rax" ;
appstr buf @@ "/* ArrayValue END */" ;
Buffer.contents buf
| _, RecordValue (Some typename, fields) ->
let offset = new_offset env 1 in
let env = {env with offset} in
let buf = Buffer.create 128 in
appfmt buf "/* RecordValue %s BEGIN */" typename ;
appstr buf @@ gen_alloc_block (List.length fields) 0 1 ;
appfmt buf "mov [rbp + %d], rax" offset ;
List.iter
(fun (fieldname, ast) ->
appstr buf @@ aux env (NonTail, ast) ;
appstr buf "pop rax" ;
appfmt buf "mov rdi, [rbp + %d]" offset ;
let idx = Hashtbl.find records_idx (typename, fieldname) in
appfmt buf "mov [rdi + %d], rax" (idx * 8) )
fields ;
appfmt buf "push [rbp + %d]" offset ;
appfmt buf "/* RecordValue %s END */" typename ;
Buffer.contents buf
| _, RecordValueWith (Some typename, base, fields, Some comp_fieldnames) ->
let offset = new_offset env 1 in
let env = {env with offset} in
let buf = Buffer.create 128 in
appfmt buf "/* RecordValueWith %s BEGIN */" typename ;
appstr buf
@@ gen_alloc_block
(List.length fields + List.length comp_fieldnames)
0 1 ;
appfmt buf "mov [rbp + %d], rax" offset ;
List.iter
(fun (fieldname, ast) ->
appstr buf @@ aux env (NonTail, ast) ;
appstr buf "pop rax" ;
appfmt buf "mov rdi, [rbp + %d]" offset ;
let idx = Hashtbl.find records_idx (typename, fieldname) in
appfmt buf "mov [rdi + %d], rax" (idx * 8) )
fields ;
appstr buf @@ aux env (NonTail, base) ;
appstr buf "pop rax" ;
appfmt buf "mov rdi, [rbp + %d]" offset ;
List.iter
(fun fieldname ->
let idx = Hashtbl.find records_idx (typename, fieldname) in
appfmt buf "mov rsi, [rax + %d]" (idx * 8) ;
appfmt buf "mov [rdi + %d], rsi" (idx * 8) )
comp_fieldnames ;
appstr buf "push rdi" ;
appfmt buf "/* RecordValueWith %s END */" typename ;
Buffer.contents buf
| _, RecordDotAccess (Some typename, ast, fieldname) ->
let idx = Hashtbl.find records_idx (typename, fieldname) in
let buf = Buffer.create 128 in
appfmt buf "/* RecordDotAccess %s %s */" typename fieldname ;
appstr buf @@ aux env (NonTail, ast) ;
appstr buf "pop rax" ;
appfmt buf "push [rax + %d]" (idx * 8) ;
Buffer.contents buf
| _, Add (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf @@ "pop rdi" ;
appstr buf @@ untag_int "rdi" ;
appstr buf @@ "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf @@ "add rax, rdi" ;
appstr buf @@ tag_int "rax" ;
appstr buf @@ "push rax" ;
Buffer.contents buf
| _, Sub (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf @@ "pop rdi" ;
appstr buf @@ untag_int "rdi" ;
appstr buf @@ "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf @@ "sub rax, rdi" ;
appstr buf @@ tag_int "rax" ;
appstr buf @@ "push rax" ;
Buffer.contents buf
| _, Mul (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf @@ "pop rdi" ;
appstr buf @@ untag_int "rdi" ;
appstr buf @@ "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf @@ "imul rax, rdi" ;
appstr buf @@ tag_int "rax" ;
appstr buf @@ "push rax" ;
Buffer.contents buf
| _, Div (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf @@ untag_int "rdi" ;
appstr buf "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf "cqo" ;
appstr buf "idiv rdi" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, Rem (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf @@ untag_int "rdi" ;
appstr buf "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf "cqo" ;
appstr buf "idiv rdi" ;
appstr buf @@ tag_int "rdx" ;
appstr buf "push rdx" ;
Buffer.contents buf
| _, LogicalLeftShift (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rcx" ;
appstr buf @@ untag_int "rcx" ;
appstr buf "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf "shl rax, cl" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, LogicalRightShift (lhs, rhs) ->
(* Note that the size of int is 63bit, not 64bit. *)
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rcx" ;
appstr buf @@ untag_int "rcx" ;
appstr buf "pop rax" ;
appstr buf "shr rax, cl" ;
appstr buf "or rax, 1" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, ArithmeticRightShift (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rcx" ;
appstr buf @@ untag_int "rcx" ;
appstr buf "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf "sar rax, cl" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, BitwiseAnd (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf "pop rax" ;
appstr buf "and rax, rdi" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, BitwiseOr (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf "pop rax" ;
appstr buf "or rax, rdi" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, StringConcat (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rbx" ;
appstr buf "pop rax" ;
appstr buf "call aqaml_concat_string" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, ListConcat (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rbx" ;
appstr buf "pop rax" ;
appstr buf "call aqaml_concat_list" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, RefAssign (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rbx" ;
appstr buf "pop rax" ;
appstr buf "mov [rax], rbx" ;
(* push unit value *)
appstr buf "push 1" ;
Buffer.contents buf
| _, RecordAssign (Some typename, lhs, fieldname, rhs) ->
let idx = Hashtbl.find records_idx (typename, fieldname) in
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rbx" ;
appstr buf "pop rax" ;
appfmt buf "mov [rax + %d], rbx" (idx * 8) ;
(* push unit value *)
appstr buf "push 1" ;
Buffer.contents buf
| _, Deref ast ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, ast) ;
appstr buf "pop rax" ;
appstr buf "push [rax]" ;
Buffer.contents buf
| _, Positate ast -> ""
| _, Negate ast ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, ast) ;
appstr buf "pop rax" ;
appstr buf @@ untag_int "rax" ;
appstr buf "neg rax" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, StructEqual (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf @@ "pop rbx" ;
appstr buf @@ "pop rax" ;
appstr buf @@ "call aqaml_structural_equal" ;
appstr buf @@ "push rax" ;
Buffer.contents buf
| _, StructInequal (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rbx" ;
appstr buf "pop rax" ;
appstr buf "call aqaml_structural_inequal" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, LessThan (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf "pop rax" ;
appstr buf "cmp rax, rdi" ;
appstr buf "setl al" ;
appstr buf "movzx rax, al" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, LessThanEqual (lhs, rhs) ->
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rdi" ;
appstr buf "pop rax" ;
appstr buf "cmp rax, rdi" ;
appstr buf "setle al" ;
appstr buf "movzx rax, al" ;
appstr buf @@ tag_int "rax" ;
appstr buf "push rax" ;
Buffer.contents buf
| _, LogicalAnd (lhs, rhs) ->
let false_label = make_label () in
let exit_label = make_label () in
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int 0 ;
appfmt buf "je %s" false_label ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int 0 ;
appfmt buf "je %s" false_label ;
appfmt buf "push %d" @@ tagged_int 1 ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" false_label ;
appfmt buf "push %d" @@ tagged_int 0 ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
| _, LogicalOr (lhs, rhs) ->
let true_label = make_label () in
let exit_label = make_label () in
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int 1 ;
appfmt buf "je %s" true_label ;
appstr buf @@ aux env (NonTail, rhs) ;
appstr buf "pop rax" ;
appfmt buf "cmp rax, %d" @@ tagged_int 1 ;
appfmt buf "je %s" true_label ;
appfmt buf "push %d" @@ tagged_int 0 ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" true_label ;
appfmt buf "push %d" @@ tagged_int 1 ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
| istail, IfThenElse (cond, then_body, else_body) ->
let false_label = make_label () in
let exit_label = make_label () in
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, cond) ;
appstr buf "pop rax" ;
appstr buf "cmp rax, 1" (* if rax = 0 then then_body else else_body *) ;
appfmt buf "je %s" false_label ;
appstr buf @@ aux env (istail, then_body) ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" false_label ;
( match else_body with
| None ->
appstr buf @@ aux env (istail, IntValue 0)
(* unit value is IntValue 0 *)
| Some else_body -> appstr buf @@ aux env (istail, else_body) ) ;
appfmt buf "%s:" exit_label ;
Buffer.contents buf
| istail, ExprSeq exprs ->
String.concat "\npop rax\n"
(List.mapi
(fun i x ->
aux env
((if i = List.length exprs - 1 then istail else NonTail), x)
)
exprs)
| _, Var varname -> (
try
let offset = Hashmap.find varname env.varoffset in
let buf = Buffer.create 128 in
appfmt buf "mov rax, [rbp + %d]" offset ;
appstr buf "push rax" ;
Buffer.contents buf
with Not_found ->
failwith (sprintf "not found in code generation: %s" varname) )
| istail, CtorApp (Some typename, ctorname, None) ->
aux env
@@ ( istail
, IntValue
( try Hashtbl.find ctors_id (typename, ctorname)
with Not_found -> Hashtbl.find exps_id typename ) )
| _, CtorApp (Some typename, ctorname, Some arg) ->
let buf = Buffer.create 128 in
appstr buf
@@ gen_alloc_block 1 0
( try Hashtbl.find ctors_id (typename, ctorname)
with Not_found -> Hashtbl.find exps_id typename ) ;
appstr buf "push rax" ;
appstr buf @@ aux env (NonTail, arg) ;
appstr buf "pop rdi" ;
appstr buf "pop rax" ;
appfmt buf "mov [rax], rdi" ;
appstr buf "push rax" ;
Buffer.contents buf
| istail, AppDir (funcname, args) ->
let buf = Buffer.create 128 in
List.iter
(fun arg -> appstr buf @@ aux env (NonTail, arg))
(List.rev args) ;
List.iteri
(fun index reg ->
if index < List.length args then appfmt buf "pop %s" reg )
["rax"; "rbx"; "rdi"; "rsi"; "rdx"; "rcx"; "r8"; "r9"; "r12"; "r13"] ;
( match istail with
| NonTail ->
appfmt buf "call %s" funcname ;
appstr buf "push rax"
| Tail ->
(* TODO: arguments passed via stack *)
appstr buf "mov rsp, rbp" ;
appstr buf "pop rbp" ;
appfmt buf "jmp %s" funcname ) ;
Buffer.contents buf
| istail, AppCls (func, args) ->
(* call aqaml_appcls *)
(* TODO: Any better way exists? *)
(* TODO: only 9 or less arguments are allowed *)
if List.length args > 9 then
failwith "only 9 or less arguments are allowed (not implemented)" ;
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, func) ;
List.iter
(fun arg -> appstr buf @@ aux env (NonTail, arg))
(List.rev args) ;
List.iteri
(fun index reg ->
if index < List.length args then appfmt buf "pop %s" reg )
["rbx"; "rdi"; "rsi"; "rdx"; "rcx"; "r8"; "r9"; "r12"; "r13"] ;
appstr buf "pop rax" ;
( match istail with
| NonTail ->
appfmt buf "call aqaml_appcls%d" @@ List.length args ;
appstr buf "push rax"
| Tail ->
(* TODO: arguments passed via stack *)
appstr buf "mov rsp, rbp" ;
appstr buf "pop rbp" ;
appfmt buf "jmp aqaml_appcls%d" @@ List.length args ) ;
Buffer.contents buf
| _, ForLoop (dir, indexname, expr1, expr2, expr3) ->
let loop_label = make_label () in
let exit_label = make_label () in
let offset = new_offset env 1 in
let env' =
{offset; varoffset= Hashmap.add indexname offset env.varoffset}
in
let buf = Buffer.create 128 in
appstr buf @@ aux env (NonTail, expr2) ;
appstr buf @@ aux env (NonTail, expr1) ;
appstr buf "pop rax" ;
appfmt buf "mov [rbp + %d], rax" offset ;
appstr buf "pop rax" ;
appfmt buf "cmp [rbp + %d], rax" offset ;
appfmt buf "%s %s"
(match dir with ForTo -> "jg" | ForDownto -> "jl")
exit_label ;
appstr buf "push rax" ;
appfmt buf "%s:" loop_label ;
appfmt buf "pop rax" ;
appfmt buf "cmp [rbp + %d], rax" offset ;
appfmt buf "%s %s"
(match dir with ForTo -> "jg" | ForDownto -> "jl")
exit_label ;
appstr buf "push rax" ;
appstr buf @@ aux env' (NonTail, expr3) ;
appstr buf "pop rax /* pop unit value */" ;
( match dir with
| ForTo -> appfmt buf "add QWORD PTR [rbp + %d], 2" offset
| ForDownto -> appfmt buf "sub QWORD PTR [rbp + %d], 2" offset ) ;
appfmt buf "jmp %s" loop_label ;
appfmt buf "%s:" exit_label ;
appfmt buf "push %d /* push unit value */" @@ tagged_int 0 ;
Buffer.contents buf
| istail, LetAndAnalyzed (lets, rhs_of_in) ->
let buf = Buffer.create 256 in
let aux' env' = function
| LetVar (false, bind, lhs) ->
let varnames = varnames_in_pattern bind in
let offset = new_offset env' @@ List.length varnames in
let env' =
{ offset
; varoffset=
integrate env'.varoffset @@ hashmap_of_list
@@ List.mapi
(fun i n -> (n, env'.offset - ((i + 1) * 8)))
varnames }
in
appstr buf @@ aux env (NonTail, lhs) ;
appstr buf @@ gen_assign_pattern_or_raise env' bind ;
env'
| LetFunc (_, funcname, _, _, _) ->
let offset = new_offset env' 1 in
let env' =
{offset; varoffset= Hashmap.add funcname offset env'.varoffset}
in
env'
| _ -> raise Unexpected_ast
in
let env' = List.fold_left (fun env le -> aux' env le) env lets in
appstr buf @@ aux env' (istail, rhs_of_in) ;
Buffer.contents buf
| _, MakeCls (funcname, nargs, freevars) ->
let buf = Buffer.create 128 in
appstr buf @@ gen_alloc_block (List.length freevars + 2) 0 247 ;
appfmt buf "lea rdi, [rip + %s]" funcname ;
appstr buf "mov [rax], rdi" ;
appfmt buf "mov QWORD PTR [rax + 8], %d" @@ nargs ;
List.iteri
(fun i var ->
let offset = Hashmap.find var env.varoffset in
appfmt buf "mov rdi, [rbp + %d]" offset ;
appfmt buf "mov [rax + %d], rdi" ((i + 2) * 8) )
freevars ;
appstr buf "push rax" ;
Buffer.contents buf
| istail, MatchWith (cond, cases) ->
let buf = Buffer.create 256 in
appstr buf "/* MatchWith BEGIN */" ;
appstr buf @@ aux env (NonTail, cond) ;
appstr buf
@@ gen_pattern_match_cases env cases istail
(let buf = Buffer.create 128 in
appstr buf "mov rax, 1" ;
(* TODO: arguments for Match_failure *)
appstr buf @@ gen_raise_exp_of "Stdlib.Match_failure" true ;
Buffer.contents buf) ;
appstr buf "/* MatchWith END */" ;
Buffer.contents buf
| istail, TryWith (cond, cases) ->
let offset = new_offset env 1 in
let env = {env with offset} in
let exp_label = make_label () in
let exit_label = make_label () in
let buf = Buffer.create 256 in
appstr buf "/* TryWith BEGIN */" ;
(* set an exception handler *)
appfmt buf "lea r13, [rip + %s]" exp_label ;
appstr buf "push rbp" ;
appstr buf "push r13" ;
appstr buf "push r14" ;
appstr buf "mov r14, rsp" ;
appstr buf @@ aux env (NonTail, cond) ;
appstr buf "pop rax" ;
appstr buf "pop r14 /* pop for r14 */" ;
appstr buf "pop rbx /* pop for r13 */" ;
appstr buf "pop rbx /* pop for rbp */" ;
appstr buf "push rax" ;
appfmt buf "jmp %s" exit_label ;
appfmt buf "%s:" exp_label ;
appstr buf "pop rbp" ;
appfmt buf "mov [rbp + %d], rax" offset ;
appstr buf "push rax" ;
appstr buf
@@ gen_pattern_match_cases env cases istail
(let buf = Buffer.create 128 in
appfmt buf "mov rax, [rbp + %d]" offset ;
appstr buf @@ gen_raise () ;
Buffer.contents buf) ;
appfmt buf "%s:" exit_label ;
appstr buf "/* TryWith END */" ;
Buffer.contents buf
| _ -> raise Unexpected_ast
in
let strings_code =
let buf = Buffer.create 80 in
appfmt buf ".data" ;
List.iter
(function
| StringValue (id, str) ->
let size = (String.length str / 8) + 1 in
let space = 7 - (String.length str mod 8) in
appfmt buf ".quad %d" ((size lsl 10) lor (0 lsl 8) lor 252) ;
appfmt buf "%s:" id ;
appfmt buf ".ascii \"%s\"" (escape_string str) ;
if space <> 0 then appfmt buf ".space %d" space ;
appfmt buf ".byte %d\n" space
| _ -> raise Unexpected_ast)
strings ;
appfmt buf ".text\n" ;
Buffer.contents buf
in
let letfuncs_code =
String.concat "\n"
(List.map
(function
| LetFunc (recursive, funcname, args, func, freevars) ->
let varnames =
List.flatten @@ List.map varnames_in_pattern args
in
let env =
{ offset= List.length varnames * -8
; varoffset=
integrate Hashmap.empty @@ hashmap_of_list
@@ List.mapi (fun i arg -> (arg, -8 * (i + 1))) varnames
}
in
(* if closured then freevars are stored on the stack *)
let env =
{ offset= env.offset - (8 * List.length freevars)
; varoffset=
integrate env.varoffset @@ hashmap_of_list
@@ List.mapi
(fun i var -> (var, env.offset - (8 * (i + 1))))
freevars }
in
stack_size := -env.offset ;
let code = aux env (Tail, func) in
let buf = Buffer.create 256 in
appfmt buf "/* %s(%d) */"
(if recursive then "recursive" else "")
(List.length args) ;
appstr buf @@ funcname ^ ":" ;
appstr buf @@ "push rbp" ;
appstr buf @@ "mov rbp, rsp" ;
appfmt buf "sub rsp, %d" !stack_size ;
(* push arguments in order *)
(* first the value for closure *)
if List.length freevars <> 0 then
appfmt buf "push %s" @@ reg_of_index @@ List.length args ;
(* then real arguments *)
appstr buf @@ String.concat "\n" @@ List.rev
@@ List.mapi
(fun i _ -> sprintf "push %s" (reg_of_index i))
args ;
(* process real arguments *)
appstr buf @@ String.concat "\n"
@@ List.map
(fun ptn -> gen_assign_pattern_or_raise env ptn)
args ;
(* process for closure *)
if List.length freevars > 0 then (
appstr buf "pop rax" ;
List.iteri
(fun i var ->
appfmt buf "mov rdi, [rax + %d]" (i * 8) ;
appfmt buf "mov [rbp + %d], rdi"
@@ Hashmap.find var env.varoffset )
freevars ) ;
appstr buf code ;
appstr buf "pop rax" ;
appstr buf "mov rsp, rbp" ;
appstr buf "pop rbp" ;
appstr buf "ret\n\n" ;
Buffer.contents buf
| _ -> failwith "LetFunc should be here")
letfuncs)
in
let main_code =
let buf = Buffer.create 512 in
let gen_c_func funcname argument_types ret_type =
appfmt buf "%s:" funcname ;
appstr buf save_rsp ;
List.iteri
(fun i -> function
| CTyInt | CTyUnit -> appstr buf @@ untag_int @@ reg_of_index i
| _ -> () )
argument_types ;
for i = List.length argument_types - 1 downto 0 do
appfmt buf "mov %s"
@@
match i with
| 0 -> "rdi, rax"
| 1 -> "rsi, rbx"
| 2 -> "rdx, rdi"
| 3 -> "rcx, rsi"
| 4 -> "r8, rdx"
| 5 -> "r9, rcx"
| _ ->
failwith "C function with more than 6 arguments can't be handled."
done ;
appstr buf @@ gen_call_with_aligned_rsp @@ sprintf "%s_detail@PLT" funcname ;
(* appfmt buf "call %s_detail@PLT" funcname ; *)
( match ret_type with
| CTyInt -> appstr buf @@ tag_int "rax"
| CTyUnit -> appfmt buf "mov rax, %d" @@ tagged_int 0
| CTyPtr -> () ) ;
appstr buf "ret" ; appstr buf ""
in
gen_c_func "aqaml_structural_equal" [CTyPtr; CTyPtr] CTyInt ;
gen_c_func "aqaml_concat_string" [CTyPtr; CTyPtr] CTyPtr ;
gen_c_func "aqaml_concat_list" [CTyPtr; CTyPtr] CTyPtr ;
gen_c_func "aqaml_string_length" [CTyPtr] CTyInt ;
gen_c_func "aqaml_string_get" [CTyPtr; CTyInt] CTyInt ;
gen_c_func "aqaml_string_set" [CTyPtr; CTyInt; CTyInt] CTyInt ;
gen_c_func "aqaml_array_get" [CTyPtr; CTyInt] CTyPtr ;
gen_c_func "aqaml_array_length" [CTyPtr] CTyInt ;
gen_c_func "aqaml_string_create" [CTyInt] CTyPtr ;
gen_c_func "aqaml_string_blit"
[CTyPtr; CTyInt; CTyPtr; CTyInt; CTyInt]
CTyUnit ;
gen_c_func "aqaml_string_sub" [CTyPtr; CTyInt; CTyInt] CTyPtr ;
gen_c_func "aqaml_string_make" [CTyInt; CTyInt] CTyPtr ;
gen_c_func "aqaml_string_of_int" [CTyInt] CTyPtr ;
gen_c_func "aqaml_print_string" [CTyPtr] CTyUnit ;
gen_c_func "aqaml_prerr_string" [CTyPtr] CTyUnit ;
gen_c_func "aqaml_printf_ksprintf" [CTyPtr; CTyPtr] CTyPtr ;
appstr buf
".global aqaml_printf_ksprintf1, aqaml_printf_ksprintf2, \
aqaml_printf_ksprintf3, aqaml_printf_ksprintf4, aqaml_printf_ksprintf5" ;