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koncal sicxe

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Jaka Furlan 2025-11-30 17:07:49 +01:00
parent ad8728bdf4
commit 303f5e06a7
5 changed files with 27 additions and 20 deletions
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36
ass2/SICocaml/sicxeDune/lib/izvajalnik.ml
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@ -21,8 +21,14 @@ let notImplemented (mnemonic : string) = Printf.printf "mnemonic %s is not imple
let invalidOpcode (opcode : int) = Printf.printf "opcode %d is invalid!\n" opcode
let invalidAdressing () = Printf.printf "invalid adressing!\n"
(*spremeni disp v signed če se uporablja PC-relativno*)
let to_signed (x : int) : int =
let mask12 = 0xFFF in (* keep only 12 bits *)
let x = x land mask12 in (* mask input to 12 bits *)
if x land 0x800 <> 0 then (* if the 24th bit (sign bit) is set *)
x - (1 lsl 12) (* subtract 2^24 to get negative value *)
else
x
(*beri drugi byte ukaza formata 2 in vrni r1 in r2, kot int njunih vrednosti (reg a -> 1, reg x -> 2 ...)*)
let readR1R2 (state : Processor.state) : (int * int) =
@ -67,11 +73,11 @@ let readAddress (state : Processor.state) : int =
let address = (addr_high lsl 8) lor byte4 in
address
(*pridobi operand*)
let getOperandF3 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int =
(*pridobi effective address in operand*)
let getOperandF3 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int * int=
let ea =
if nixbpe.b = 1 && nixbpe.p = 0 then state.regs.b + disp (*B relativno*)
else if nixbpe.p = 1 && nixbpe.b = 0 then state.regs.pc + disp + 3(*PC relativno, ker PC povečamo šele po klicu te funkcije moramo tu +3*)
else if nixbpe.p = 1 && nixbpe.b = 0 then state.regs.pc + to_signed disp + 3(*PC relativno, ker PC povečamo šele po klicu te funkcije moramo tu +3*)
else disp (*direktno*)
in
let ea = if nixbpe.x = 1 then ea + state.regs.x else ea in (*+ (X) po potrebi*)
@ -83,9 +89,9 @@ let getOperandF3 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int
else if nixbpe.n = 1 && nixbpe.i = 0 then Processor.readMemAddr state (Processor.readMemAddr state ea) (* indirect *)
else failwith "Invalid addressing mode"
in
value
ea ,value
let getOperandF4 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int =
let getOperandF4 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int * int =
let ea =
if nixbpe.b = 1 && nixbpe.p = 0 then state.regs.b + disp (*B relativno*)
else if nixbpe.p = 1 && nixbpe.b = 0 then state.regs.pc + disp + 4(*PC relativno, ker PC povečamo šele po klicu te funkcije moramo tu +4*)
@ -100,7 +106,7 @@ let getOperandF4 (state : Processor.state) (nixbpe : nixbpe) (disp : int) : int
else if nixbpe.n = 1 && nixbpe.i = 0 then Processor.readMemAddr state (Processor.readMemAddr state ea) (* indirect *)
else failwith "Invalid addressing mode"
in
value
ea, value
(*execute format 1*)
let executeFormat1 (state : Processor.state) (mnemonic : OpcodeTable.mnemonic) : unit =
@ -147,7 +153,7 @@ let executeFormat2 (state: Processor.state) (mnemonic : OpcodeTable.mnemonic) :
(*execute Format 3*)
let executeFormat3 (state : Processor.state) (nixbpe : nixbpe) (mnemonic: OpcodeTable.mnemonic): unit =
let disp = readDisp state in
let operand = getOperandF3 state nixbpe disp in
let ea ,operand = getOperandF3 state nixbpe disp in
(*debugging*)
Printf.printf "[Izvajalnik/executeFormat3] Mnemonic: %s, nixbpe: %s, operand: %d = 0x%02X\n"
(string_of_mnemonic mnemonic) (string_of_nixbpe nixbpe) operand operand;
@ -168,11 +174,11 @@ let executeFormat3 (state : Processor.state) (nixbpe : nixbpe) (mnemonic: Opcode
| WD -> notImplemented "WD3"
(* Jump / subroutine *)
| J -> IzvajalnikF3.j state operand
| JEQ -> IzvajalnikF3.jeq state operand
| JGT -> IzvajalnikF3.jgt state operand
| JLT -> IzvajalnikF3.jlt state operand
| JSUB -> IzvajalnikF3.jsub state operand
| J -> IzvajalnikF3.j state ea
| JEQ -> IzvajalnikF3.jeq state ea
| JGT -> IzvajalnikF3.jgt state ea
| JLT -> IzvajalnikF3.jlt state ea
| JSUB -> IzvajalnikF3.jsub state ea
| RSUB -> IzvajalnikF3.rsub state
(* Load/store *)
@ -202,7 +208,7 @@ let executeFormat3 (state : Processor.state) (nixbpe : nixbpe) (mnemonic: Opcode
let executeFormat4 (state : Processor.state) (nixbpe : nixbpe) (mnemonic: OpcodeTable.mnemonic): unit =
let address = readAddress state in
let operand = getOperandF4 state nixbpe address in
let _, operand = getOperandF4 state nixbpe address in
(*debugging*)
Printf.printf "[Izvajalnik/executeFormat4] Mnemonic: %s, nixbpe: %s, operand: %d = 0x%02X\n"
(string_of_mnemonic mnemonic) (string_of_nixbpe nixbpe) operand operand;