"""
The JUMP_IF_LTE_ACC operation.
Sets PC (jumps) to a constant if the module passed as an argument is
less than or equal to the value in ACC.
This operation will generate and store (clobber) ALU flags.
"""
from ..language_defs import (
INSTRUCTION_GROUPS,
DEST_REGISTERS,
SRC_REGISTERS,
ALU_CONTROL_FLAGS,
FLAGS,
)
from . import jump_if_comparison_base
from ..operation_utils import assemble_instruction, match_and_parse_line
from ..data_structures import (
get_arg_def_template, get_machine_code_byte_template
)
_NAME = "JUMP_IF_LTE_ACC"
[docs]def generate_microcode_templates():
"""
Generate microcode for all the JUMP_IF_LTE_ACC operations.
Returns:
list(DataTemplate): DataTemplates for all the JUMP_IF_LTE_ACC
microcode.
"""
return jump_if_comparison_base.generate_microcode_templates(
INSTRUCTION_GROUPS["COPY"],
DEST_REGISTERS["SP+/-"],
SRC_REGISTERS,
# Note that we're comparing the argument against ACC, i.e. B
# against A so this is the "opposite" comparison mode.
ALU_CONTROL_FLAGS["COMPARE_LT_GTE"],
[FLAGS["CARRY_BORROW"]["HIGH"]],
[FLAGS["CARRY_BORROW"]["LOW"]],
)
[docs]def parse_line(line):
"""
Parse a line of assembly code to create machine code byte templates.
If a line is not identifiably an JUMP_IF_LTE_ACC assembly line,
return an empty list instead.
Args:
line (str): Assembly line to be parsed.
Returns:
list(dict): List of instruction byte template dictionaries or an
empty list.
"""
return jump_if_comparison_base.parse_line(
line,
_NAME,
INSTRUCTION_GROUPS["COPY"],
DEST_REGISTERS["SP+/-"],
SRC_REGISTERS,
)