added support for xml schemas
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example4.xml
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68
example4.xml
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@ -0,0 +1,68 @@
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<schema>
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<structure id="main" bits="32">
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<range start="28" end="31" name="cond"></range>
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<range start="27" end="27" name="0"></range>
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<range start="26" end="26" name="1"></range>
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<range start="25" end="25" name="I"></range>
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<range start="24" end="24" name="P">
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<description>pre / post indexing bit</description>
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<values>
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<case value="0">post, add offset after transfer</case>
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<case value="1">pre, add offset before transfer</case>
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</values>
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</range>
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<range start="23" end="23" name="U">
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<description>up / down bit</description>
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<values>
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<case value="0">down, subtract offset from base</case>
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<case value="1">up, addition offset to base</case>
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</values>
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</range>
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<range start="22" end="22" name="B">
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<description>byte / word bit</description>
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<values>
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<case value="0">transfer word quantity</case>
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<case value="1">transfer byte quantity</case>
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</values>
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</range>
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<range start="21" end="21" name="W">
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<description>write-back bit</description>
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<values>
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<case value="0">no write-back</case>
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<case value="1">write address into base</case>
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</values>
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</range>
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<range start="20" end="20" name="L">
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<description>load / store bit</description>
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<values>
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<case value="0">store to memory</case>
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<case value="1">load from memory</case>
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</values>
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</range>
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<range start="16" end="19" name="Rn">
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<description>base register</description>
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</range>
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<range start="12" end="15" name="Rd">
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<description>source / destination register</description>
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</range>
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<range start="0" end="11" name="offset" depends-on="25">
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<values>
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<case value="0" structure="immediateOffset">offset is an immediate value</case>
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<case value="1" structure="registerOffset">offset is a register</case>
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</values>
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</range>
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</structure>
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<structure id="immediateOffset" bits="12">
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<range start="0" end="11" name="12-bit immediate offset">
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<description>unsigned number</description>
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</range>
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</structure>
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<structure id="registerOffset" bits="12">
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<range start="4" end="11" name="shift">
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<description>shift applied to Rm</description>
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</range>
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<range start="0" end="3" name="Rm">
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<description>offset register</description>
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</range>
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</structure>
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</schema>
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@ -5,12 +5,13 @@ import yaml
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from config import Config
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from renderer import Renderer
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from structure import Structure
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from xml_loader import XMLLoader
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class UnsupportedFormatException(Exception):
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...
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class InstructionSetSchema:
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VALID_EXTENSIONS = ("yaml", "json")
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VALID_EXTENSIONS = ("yaml", "json", "xml")
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def __init__(self, path: str, configPath: str = "config.json") -> None:
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self.config = Config(configPath)
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@ -32,6 +33,9 @@ class InstructionSetSchema:
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elif ext == "json":
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schema = json.load(f)
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elif ext == "xml":
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schema = XMLLoader.load(f)
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self.structures = {}
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for id_, data in schema["structures"].items():
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@ -28,7 +28,7 @@ class Structure:
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values[v] = d
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range_.values = values
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return Structure(id_, data["bits"], ranges, data.get("start", 0))
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return Structure(id_, int(data["bits"]), ranges, data.get("start", 0))
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def getSortedRanges(self) -> list[Range]:
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ranges = self.ranges.values()
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65
xml_loader.py
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65
xml_loader.py
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from __future__ import annotations
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from bs4 import BeautifulSoup
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from io import TextIOWrapper
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class XMLLoader:
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def load(file_: TextIOWrapper) -> dict:
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schema = {}
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bs = BeautifulSoup(file_.read(), "xml")
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structElmts = bs.findAll("structure")
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structures = {}
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for structElmt in structElmts:
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structures[structElmt.get("id")] = XMLLoader.parseStructure(structElmt)
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schema["structures"] = structures
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return schema
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def parseStructure(structElmt: any) -> dict:
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struct = {}
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struct["bits"] = structElmt.get("bits")
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ranges = {}
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rangeElmts = structElmt.findAll("range")
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for rangeElmt in rangeElmts:
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span = rangeElmt.get("end") + "-" + rangeElmt.get("start")
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ranges[span] = XMLLoader.parseRange(rangeElmt)
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struct["ranges"] = ranges
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return struct
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def parseRange(rangeElmt: any) -> dict:
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range_ = {}
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range_["name"] = rangeElmt.get("name")
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desc = rangeElmt.find("description")
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if desc is not None: range_["description"] = desc.getText()
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valuesElmt = rangeElmt.find("values")
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if valuesElmt is not None:
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range_["values"] = XMLLoader.parseValues(valuesElmt)
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if rangeElmt.get("depends-on"):
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range_["depends-on"] = rangeElmt.get("depends-on")
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return range_
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def parseValues(valuesElmt: any) -> dict:
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values = {}
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caseElmts = valuesElmt.findAll("case")
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for caseElmt in caseElmts:
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val = caseElmt.get("value")
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desc = caseElmt.getText()
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struct = caseElmt.get("structure")
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if struct:
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values[val] = {
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"description": desc,
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"structure": struct
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}
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else:
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values[val] = desc
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return values
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