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more vm opcodes

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This commit is contained in:
Irmen de Jong 2018-03-06 21:36:41 +01:00
parent bcc1a6b91f
commit 6696887f0e
2 changed files with 58 additions and 34 deletions
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21
tinyvm/program.py
View File

@ -40,10 +40,23 @@ class Opcode(enum.IntEnum):
CMP_GTE = 105
CALL = 200
RETURN = 201
JUMP = 202
JUMP_IF_TRUE = 203
JUMP_IF_FALSE = 204
SYSCALL = 205
SYSCALL = 202
JUMP = 203
JUMP_IF_TRUE = 204
JUMP_IF_FALSE = 205
JUMP_IF_STATUS_ZERO = 206
JUMP_IF_STATUS_NE = 207
JUMP_IF_STATUS_EQ = 208
JUMP_IF_STATUS_CC = 209
JUMP_IF_STATUS_CS = 210
JUMP_IF_STATUS_VC = 211
JUMP_IF_STATUS_VS = 212
JUMP_IF_STATUS_GE = 213
JUMP_IF_STATUS_LE = 214
JUMP_IF_STATUS_GT = 215
JUMP_IF_STATUS_LT = 216
JUMP_IF_STATUS_POS = 217
JUMP_IF_STATUS_NEG = 218
class Value:

71
tinyvm/vm.py
View File

@ -52,7 +52,7 @@ Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
# various arithmetic operations, logical operations, boolean test and comparison operations
# jump label
# jump_if_true label, jump_if_false label
# @todo jump_if_status_XX label special system dependent status register conditional check such as carry bit or overflow bit)
# jump_if_status_XX label special system dependent status register conditional check such as carry bit or overflow bit)
# return (return values on stack)
# syscall function (special system dependent implementation)
# call function (arguments are on stack)
@ -74,7 +74,7 @@ import tkinter
import tkinter.font
from typing import Dict, List, Tuple, Union, no_type_check
from .program import Instruction, Variable, Block, Program, Opcode, Value
from .core import Memory, DataType, TerminateExecution
from .core import Memory, DataType, TerminateExecution, ExecutionError
class CallFrameMarker:
@ -167,15 +167,9 @@ class VM:
charin_address = 0xd001
def __init__(self, program: Program, timerprogram: Program=None) -> None:
opcode_names = [oc.name for oc in Opcode]
timerprogram = timerprogram or Program([])
for ocname in opcode_names:
if not hasattr(self, "opcode_" + ocname):
raise NotImplementedError("missing opcode method for " + ocname)
for method in dir(self):
if method.startswith("opcode_"):
if not method[7:] in opcode_names:
raise RuntimeError("opcode method for undefined opcode " + method)
for opcode in Opcode:
if opcode not in self.dispatch_table:
raise NotImplementedError("missing opcode dispatch for " + opcode.name)
for oc in Opcode:
if oc not in self.dispatch_table:
raise NotImplementedError("no dispatch entry in table for " + oc.name)
@ -186,7 +180,7 @@ class VM:
self.memory.mark_readonly(start, end)
self.main_stack = Stack()
self.timer_stack = Stack()
self.main_program, self.timer_program, self.variables, self.labels = self.flatten_programs(program, timerprogram)
self.main_program, self.timer_program, self.variables, self.labels = self.flatten_programs(program, timerprogram or Program([]))
self.connect_instruction_pointers(self.main_program)
self.connect_instruction_pointers(self.timer_program)
self.program = self.main_program
@ -516,23 +510,6 @@ class VM:
self.pc = callframe.returninstruction
return False
def opcode_JUMP(self, instruction: Instruction) -> bool:
return True # jump simply points to the next instruction elsewhere
def opcode_JUMP_IF_TRUE(self, instruction: Instruction) -> bool:
result = self.stack.pop()
if result:
self.pc = self.pc.alt_next # alternative next instruction
return False
return True
def opcode_JUMP_IF_FALSE(self, instruction: Instruction) -> bool:
result = self.stack.pop()
if result:
return True
self.pc = self.pc.alt_next # alternative next instruction
return False
def opcode_SYSCALL(self, instruction: Instruction) -> bool:
syscall = instruction.args[0]
assert isinstance(syscall, str)
@ -542,6 +519,27 @@ class VM:
else:
raise RuntimeError("no syscall method for " + syscall)
def opcode_JUMP(self, instruction: Instruction) -> bool:
return True # jump simply points to the next instruction elsewhere
def opcode_JUMP_IF_TRUE(self, instruction: Instruction) -> bool:
result = self.stack.pop()
assert isinstance(result, Value)
if result.value:
self.pc = self.pc.alt_next # alternative next instruction
return False
return True
def opcode_JUMP_IF_FALSE(self, instruction: Instruction) -> bool:
result = self.stack.pop()
if result.value: # type: ignore
return True
self.pc = self.pc.alt_next # alternative next instruction
return False
def opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG(self, instruction: Instruction) -> bool:
raise ExecutionError("unsupported conditional jump", instruction) # @todo implement hardware specific status register flags
dispatch_table = {
Opcode.TERMINATE: opcode_TERMINATE,
Opcode.NOP: opcode_NOP,
@ -570,10 +568,23 @@ class VM:
Opcode.CMP_GTE: opcode_CMP_GTE,
Opcode.CALL: opcode_CALL,
Opcode.RETURN: opcode_RETURN,
Opcode.SYSCALL: opcode_SYSCALL,
Opcode.JUMP: opcode_JUMP,
Opcode.JUMP_IF_TRUE: opcode_JUMP_IF_TRUE,
Opcode.JUMP_IF_FALSE: opcode_JUMP_IF_FALSE,
Opcode.SYSCALL: opcode_SYSCALL,
Opcode.JUMP_IF_STATUS_ZERO: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_NE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_EQ: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_CC: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_CS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_VC: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_VS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_GE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_LE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_GT: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_LT: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_POS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
Opcode.JUMP_IF_STATUS_NEG: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
}