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-rw-r--r--asm/Makefile10
-rw-r--r--asm/_tags4
-rw-r--r--asm/asm.ml3
-rw-r--r--asm/asmlex.mll21
-rw-r--r--asm/asmpars.mly262
-rw-r--r--asm/assembler.ml12
-rw-r--r--asm/test.asm28
7 files changed, 212 insertions, 128 deletions
diff --git a/asm/Makefile b/asm/Makefile
new file mode 100644
index 0000000..8ac2004
--- /dev/null
+++ b/asm/Makefile
@@ -0,0 +1,10 @@
+
+all: asm
+
+asm: assembler.ml asm.ml asmlex.mll asmpars.mly
+ ocamlbuild assembler.native
+ mv assembler.native asm
+
+clean:
+ rm asm
+ rm -r _build
diff --git a/asm/_tags b/asm/_tags
new file mode 100644
index 0000000..3ed8b5a
--- /dev/null
+++ b/asm/_tags
@@ -0,0 +1,4 @@
+true: use_menhir
+<*.ml>: debug
+<*.byte>: use_unix, debug
+
diff --git a/asm/asm.ml b/asm/asm.ml
index 5a3a96b..7df7604 100644
--- a/asm/asm.ml
+++ b/asm/asm.ml
@@ -1,3 +1,5 @@
+exception Asm_error of string
+
type reg = int
type imm =
@@ -55,6 +57,7 @@ type instr =
| Liu of (reg * imm)
| Liuz of (reg * imm)
| Lra of imm
+ | TwoRawBytes of (int * int)
module Imap = Map.Make(String)
diff --git a/asm/asmlex.mll b/asm/asmlex.mll
index 4d78e87..726b732 100644
--- a/asm/asmlex.mll
+++ b/asm/asmlex.mll
@@ -23,10 +23,14 @@
"liu",LIU;
"liuz",LIUZ;
"lra",LRA;
+ "la",LA;
"li",LI;
"move",MOVE;
"jz",JZ;
- "jnz",JNZ
+ "jnz",JNZ;
+ "byte",BYTE;
+ "word",WORD;
+ "asciiz",ASCIIZ;
]
let regs = [
@@ -49,8 +53,8 @@
let v =
let c = Char.code n.[i] in
if c >= Char.code '0' && c <= Char.code '9' then c - (Char.code '0')
- else if c >= Char.code 'a' && c <= Char.code 'f' then c - (Char.code 'a')
- else c - (Char.code 'A') in
+ else if c >= Char.code 'a' && c <= Char.code 'f' then c - (Char.code 'a') + 10
+ else c - (Char.code 'A') + 10 in
res := !res + v
done;
!res
@@ -84,7 +88,8 @@ rule token = parse
{ INT (read_16 n) }
| (digit)+ as n { INT (int_of_string n) }
| "0b" (['0' '1']+ as n) { INT (read_2 n) }
- | ['A'-'Z']+ as name { REG (List.assoc name regs) }
+ | '"' { STR (lex_str "" lexbuf) }
+ | ['A'-'Z']+ as name { try REG (List.assoc name regs) with Not_found -> raise (Asm_error ("no reg " ^ name))}
| '$' (['0'-'7'] as n) { REG (Char.code n - (Char.code '0')) }
| ".text" { TEXT }
| ".data" { DATA }
@@ -96,3 +101,11 @@ and comment = parse
| eof { EOF }
| '\n' { Lexing.new_line lexbuf; token lexbuf }
| _ { comment lexbuf }
+
+and lex_str q = parse
+ | eof { q }
+ | '"' { q }
+ | "\\\"" { lex_str (q ^ "\"") lexbuf }
+ | "\\\\" { lex_str (q ^ "\\") lexbuf }
+ | "\\n" { lex_str (q ^ "\n") lexbuf }
+ | _ as c { lex_str (q ^ String.make 1 c) lexbuf }
diff --git a/asm/asmpars.mly b/asm/asmpars.mly
index c8f3944..ebc4ae7 100644
--- a/asm/asmpars.mly
+++ b/asm/asmpars.mly
@@ -1,139 +1,163 @@
%{
- open Asm
-
- let unsigned = function
- | Addu
- | Subu
- | Mulu
- | Divu
- | Sltu
- | Sleu
- | Jltru
- | Jleru
- -> true
- | _ -> false
-
- let pc = ref 0
-
- let ram = ref 0x8000
-
- let add r i = r := !r + i
-
- let lbls2 = ref (Imap.empty)
-
- let li u r = function
- | Imm i ->
- let c =
- if u then i < 1 lsl 8
- else i >= -(1 lsl 7) && i < 1 lsl 7 in
- if c then (add pc 2; [Lilz (r,Imm i)])
- else (add pc 4; [Lilz (r,Imm (i land 0x00FF)); Liu (r,Imm ((i land 0xFF00) lsr 8))])
- | Lab id ->
- add pc 4; [Lilz (r,Lab id); Liu (r,Labu id)]
- | _ -> assert false
-
- let up = function
- | Imm i -> Imm i
- | Lab l -> Labu l
- | _ -> assert false
+ open Asm
+
+ let unsigned = function
+ | Addu
+ | Subu
+ | Mulu
+ | Divu
+ | Sltu
+ | Sleu
+ | Jltru
+ | Jleru
+ -> true
+ | _ -> false
+
+ let pc = ref 0
+
+ let ram = ref 0x8000
+
+ let add r i = r := !r + i
+
+ let lbls2 = ref (Imap.empty)
+
+ let li u r = function
+ | Imm i ->
+ let c =
+ if u then i < 1 lsl 8
+ else i >= -(1 lsl 7) && i < 1 lsl 7 in
+ if c then (add pc 2; [Lilz (r,Imm i)])
+ else (add pc 4; [Lilz (r,Imm (i land 0x00FF)); Liu (r,Imm ((i land 0xFF00) lsr 8))])
+ | Lab id ->
+ add pc 4; [Lilz (r,Lab id); Liu (r,Labu id)]
+ | _ -> assert false
+
+ let up = function
+ | Imm i -> Imm i
+ | Lab l -> Labu l
+ | _ -> assert false
+
+ let explode s = (* string -> char list *)
+ let rec exp i l =
+ if i < 0 then l else exp (i - 1) (s.[i] :: l) in
+ exp (String.length s - 1) [];;
%}
-%token EOF,COLON,TEXT,DATA,BYTE,WORD,MINUS,MOVE,JZ,JNZ,LP,RP
-%token POP,PUSH,INCRI,SHI,JJ,JAL,JR,JALR,LW,SW,LB,SB,NOT,LIL,LILZ,LIU,LIUZ,LRA,LI
+%token EOF,COLON,TEXT,DATA,BYTE,WORD,ASCIIZ,MINUS,MOVE,JZ,JNZ,LP,RP
+%token POP,PUSH,INCRI,SHI,JJ,JAL,JR,JALR,LW,SW,LB,SB,NOT,LIL,LILZ,LIU,LIUZ,LRA,LA,LI
%token<Asm.reg> REG
%token<Asm.fmt_r> ROP,RIOP
%token<string> ID
%token<int> INT
+%token<string> STR
%start<Asm.program> program
%%
program:
- TEXT is=instr* d=data? EOF
- { { text = List.flatten is;
- data = (match d with Some l -> List.flatten l | None -> []);
- lbls = !lbls2 } }
-
+ TEXT is=instr* d=data? EOF
+ { { text = List.flatten is;
+ data = (match d with Some l -> List.flatten l | None -> []);
+ lbls = !lbls2 } }
+
data:
- DATA d=datas* { d }
-
+ DATA d=datas* { d }
+
datas:
- | l=label d=datas { lbls2 := Imap.add l !ram !lbls2; d }
- | BYTE bs=int* { List.map (fun i -> add ram 1; i,false) bs }
- | WORD bs=int* { List.map (fun i -> add ram 2; i,true) bs }
-
-label:
- id=ID COLON { id }
-
+ | l=label_ram d=datas { d }
+ | BYTE bs=int* { List.map (fun i -> add ram 1; i,false) bs }
+ | WORD bs=int* { List.map (fun i -> add ram 2; i,true) bs }
+ | ASCIIZ s=STR {
+ add ram 1;
+ List.map (fun c -> add ram 1; Char.code c, false) (explode s) @ [0, false]
+ }
+
+label_ram:
+ id=ID COLON { lbls2 := Imap.add id !ram !lbls2; id }
+label_pc:
+ id=ID COLON { lbls2 := Imap.add id !pc !lbls2; id }
+
instr:
- | l=label i=instr { lbls2 := Imap.add l !pc !lbls2; i }
- | i=_instr { i }
-
+ | l=label_pc i=instr { i }
+ | i=_instr { i }
+
_instr:
- | o=ROP r1=REG r2=REG r3=REG { add pc 2; [R (o,r1,r2,r3)] }
- | o=RIOP r1=REG r2=REG imm=imm
- { let l = li (unsigned o) 5 imm in
- add pc 2; l @ [R (o,r1,r2,5)] }
- | INCRI r=REG i=int {
- if i >= - (1 lsl 7) && i < 1 lsl 7 then
- (add pc 2; [Incri (r,i)])
- else let l = li false 5 (Imm i) in
- (add pc 2; l @ [R (Add,r,r,5)]) }
- | SHI r=REG i=int { add pc 2; [Shi (r,i)] }
- | JJ i=imm { add pc 2; [J i] }
- | LI r=REG i=imm { li false r i }
- | JR r=REG { add pc 2; [Jr r] }
- | JAL i=imm { add pc 2; [Jal i] }
- | JALR r=REG { add pc 2; [Jalr r] }
- | LW r1=REG i=int LP r2=REG RP {
- if i >= - (1 lsl 4) && i < 1 lsl 4 then
- (add pc 2; [Lw (r1,r2,i)])
- else let l = li false 5 (Imm i) in
- (add pc 2; l @ [R (Lwr,r1,r2,5)]) }
- | SW r1=REG i=int LP r2=REG RP {
- if i >= - (1 lsl 4) && i < 1 lsl 4 then
- (add pc 2; [Sw (r1,r2,i)])
- else let l = li false 5 (Imm i) in
- (add pc 2; l @ [R (Swr,r1,r2,5)]) }
- | LB r1=REG i=int LP r2=REG RP {
- if i >= - (1 lsl 4) && i < 1 lsl 4 then
- (add pc 2; [Lb (r1,r2,i)])
- else let l = li false 5 (Imm i) in
- (add pc 2; l @ [R (Lbr,r1,r2,5)]) }
- | SB r1=REG i=int LP r2=REG RP {
- if i >= - (1 lsl 4) && i < 1 lsl 4 then
- (add pc 2; [Sb (r1,r2,i)])
- else let l = li false 5 (Imm i) in
- (add pc 2; l @ [R (Sbr,r1,r2,5)]) }
- | LW r1=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [Lw (r1,5,0)] }
- | LB r1=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [Lb (r1,5,0)] }
- | SW r1=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [Sw (r1,5,0)] }
- | SB r1=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [Sb (r1,5,0)] }
- | LRA i=int { assert (i > -(1 lsl 10) && i < 1 lsl 10);
- add pc 2; [Lra (Imm i)] }
- | LRA l=ID { add pc 2; [Lra (Lab l)] }
- | LIL r=REG i=int { add pc 2; [Lil (r,Imm i)] }
- | LILZ r=REG i=int { add pc 2; [Lilz (r,Imm i)] }
- | LIU r=REG i=int { add pc 2; [Liu (r,Imm i)] }
- | LIUZ r=REG i=int { add pc 2; [Liuz (r,Imm i)] }
- | MOVE r1=REG r2=REG { add pc 2; [R (Add,r1,r2,0)] }
- | NOT r1=REG r2=REG { add pc 2; [R (Nor,r1,r2,0)] }
- | JZ r=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [R (Jer,r,5,0)] }
- | JNZ r=REG l=ID { let l = li false 5 (Lab l) in
- add pc 2; l @ [R (Jner,r,5,0)] }
- | POP r=REG { add pc 4; [Lw (r,7,0); Incri (7,2)] }
- | PUSH r=REG { add pc 4; [Incri (7,-2); Sw (r,7,0)] }
-
+ | o=ROP r1=REG r2=REG r3=REG { add pc 2; [R (o,r1,r2,r3)] }
+ | o=RIOP r1=REG r2=REG imm=imm
+ { let l = li (unsigned o) 5 imm in
+ add pc 2; l @ [R (o,r1,r2,5)] }
+ | INCRI r=REG i=int {
+ if i >= - (1 lsl 7) && i < 1 lsl 7 then
+ (add pc 2; [Incri (r,i)])
+ else let l = li false 5 (Imm i) in
+ (add pc 2; l @ [R (Add,r,r,5)]) }
+ | SHI r=REG i=int { add pc 2; [Shi (r,i)] }
+ | JJ i=imm { add pc 2; [J i] }
+ | LI r=REG i=imm { li false r i }
+ | JR r=REG { add pc 2; [Jr r] }
+ | JAL i=imm { add pc 2; [Jal i] }
+ | JALR r=REG { add pc 2; [Jalr r] }
+ | LW r1=REG i=int LP r2=REG RP {
+ if i >= - (1 lsl 4) && i < 1 lsl 4 then
+ (add pc 2; [Lw (r1,r2,i)])
+ else let l = li false 5 (Imm i) in
+ (add pc 2; l @ [R (Lwr,r1,r2,5)]) }
+ | SW r1=REG i=int LP r2=REG RP {
+ if i >= - (1 lsl 4) && i < 1 lsl 4 then
+ (add pc 2; [Sw (r1,r2,i)])
+ else let l = li false 5 (Imm i) in
+ (add pc 2; l @ [R (Swr,r1,r2,5)]) }
+ | LB r1=REG i=int LP r2=REG RP {
+ if i >= - (1 lsl 4) && i < 1 lsl 4 then
+ (add pc 2; [Lb (r1,r2,i)])
+ else let l = li false 5 (Imm i) in
+ (add pc 2; l @ [R (Lbr,r1,r2,5)]) }
+ | SB r1=REG i=int LP r2=REG RP {
+ if i >= - (1 lsl 4) && i < 1 lsl 4 then
+ (add pc 2; [Sb (r1,r2,i)])
+ else let l = li false 5 (Imm i) in
+ (add pc 2; l @ [R (Sbr,r1,r2,5)]) }
+ | LW r1=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [Lw (r1,5,0)] }
+ | LB r1=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [Lb (r1,5,0)] }
+ | SW r1=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [Sw (r1,5,0)] }
+ | SB r1=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [Sb (r1,5,0)] }
+ | LRA i=int { assert (i > -(1 lsl 10) && i < 1 lsl 10);
+ add pc 2; [Lra (Imm i)] }
+ | LRA l=ID { add pc 2; [Lra (Lab l)] }
+ | LA r=REG l=ID { li false r (Lab l) }
+ | LIL r=REG i=int { add pc 2; [Lil (r,Imm i)] }
+ | LILZ r=REG i=int { add pc 2; [Lilz (r,Imm i)] }
+ | LIU r=REG i=int { add pc 2; [Liu (r,Imm i)] }
+ | LIUZ r=REG i=int { add pc 2; [Liuz (r,Imm i)] }
+ | MOVE r1=REG r2=REG { add pc 2; [R (Add,r1,r2,0)] }
+ | NOT r1=REG r2=REG { add pc 2; [R (Nor,r1,r2,0)] }
+ | JZ r=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [R (Jer,5,r,0)] }
+ | JNZ r=REG l=ID { let l = li false 5 (Lab l) in
+ add pc 2; l @ [R (Jner,5,r,0)] }
+ | POP r=REG { add pc 4; [Lw (r,7,0); Incri (7,2)] }
+ | PUSH r=REG { add pc 4; [Incri (7,-2); Sw (r,7,0)] }
+ | ASCIIZ s=STR {
+ let bytes = List.map Char.code (explode s) @ [0] in
+ let rec pair = function
+ | a::b::q -> (a, b)::(pair q)
+ | [a] -> [(a, 0)]
+ | [] -> []
+ in
+ let words = pair bytes in
+ add pc (List.length bytes);
+ List.map (fun (a, b) -> TwoRawBytes (a, b)) words
+ }
+
imm:
- | id=ID { Lab id }
- | n=int { Imm n }
+ | id=ID { Lab id }
+ | n=int { Imm n }
int:
- | n=INT { n }
- | MINUS n=INT { - n }
+ | n=INT { n }
+ | MINUS n=INT { - n }
diff --git a/asm/assembler.ml b/asm/assembler.ml
index 93e1067..1158181 100644
--- a/asm/assembler.ml
+++ b/asm/assembler.ml
@@ -95,10 +95,10 @@ let print_program p =
| Jal i -> let v = value2 i in j 0b01001 v, sprintf "jal %s" (its i)
| Jr reg -> r (0b01010,0) reg 0 0, sprintf "jr %s" (rts reg)
| Jalr reg -> r (0b01010,1) reg 0 0, sprintf "jalr %s" (rts reg)
- | Lw (r1,r2,i) -> k 0b10000 r1 r2 i, sprintf "lw %s %s %d" (rts r1) (rts r2) i
- | Sw (r1,r2,i) -> k 0b10001 r1 r2 i, sprintf "sw %s %s %d" (rts r1) (rts r2) i
- | Lb (r1,r2,i) -> k 0b10010 r1 r2 i, sprintf "lb %s %s %d" (rts r1) (rts r2) i
- | Sb (r1,r2,i) -> k 0b10011 r1 r2 i, sprintf "sb %s %s %d" (rts r1) (rts r2) i
+ | Lw (r1,r2,i) -> k 0b10000 r1 r2 i, sprintf "lw %s %d(%s)" (rts r1) i (rts r2)
+ | Sw (r1,r2,i) -> k 0b10001 r1 r2 i, sprintf "sw %s %d(%s)" (rts r1) i (rts r2)
+ | Lb (r1,r2,i) -> k 0b10010 r1 r2 i, sprintf "lb %s %d(%s)" (rts r1) i (rts r2)
+ | Sb (r1,r2,i) -> k 0b10011 r1 r2 i, sprintf "sb %s %d(%s)" (rts r1) i (rts r2)
| Lra i -> j 0b01100 (value2 i), sprintf "lra %s" (its i)
| Lil (r,i) -> (0b11000 lsl 11) lxor (r lsl 8) lxor (value i land 0xFF),
sprintf "lil %s %s" (rts r) (its i)
@@ -107,7 +107,9 @@ let print_program p =
| Liu (r,i) -> (0b11010 lsl 11) lxor (r lsl 8) lxor (value i land 0xFF),
sprintf "liu %s %s" (rts r) (its i)
| Liuz (r,i) -> (0b11011 lsl 11) lxor (r lsl 8) lxor (value i land 0xFF),
- sprintf "liuz %s %s" (rts r) (its i) in
+ sprintf "liuz %s %s" (rts r) (its i)
+ | TwoRawBytes(a, b) -> (a) lxor (b lsl 8), sprintf "bytes %d %d" a b
+ in
let n = List.length p.text in
let rev_lbls = Array.make n "" in
Imap.iter (fun l v ->
diff --git a/asm/test.asm b/asm/test.asm
new file mode 100644
index 0000000..d37ca61
--- /dev/null
+++ b/asm/test.asm
@@ -0,0 +1,28 @@
+.text
+ liuz SP 0xFF
+ add D Z Z
+init:
+ liuz B 0x40
+ lw B 0(B)
+ jz B init
+ add D D B
+ push D
+ la A msgtick
+ jal ser_out_msg
+ pop D
+ j init
+
+ser_out_msg:
+ liuz C 0x41
+ lil C 0x02
+ser_out_msg_loop:
+ lb B 0(A)
+ jz B ser_out_msg_ret
+ sb B 0(C)
+ incri A 1
+ j ser_out_msg_loop
+ser_out_msg_ret:
+ jr RA
+
+msgtick:
+ asciiz "Tick!"
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 03:18:03 +0000