mirror of
https://github.com/fadden/6502bench.git
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38d3adbb08
I didn't think it made sense, but I found something that used it, so apparently it's a thing. This updates the operand editor to let you choose PETSCII+DCI, and updates the assemblers to handle it correctly (really just 64tass, since the others either don't have a DCI directive or don't deal with PETSCII at all). Changed the char-encoding sample from "bad dcI" to "pet dcI", and updated the documentation.
899 lines
40 KiB
C#
899 lines
40 KiB
C#
/*
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* Copyright 2019 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Reflection;
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using System.Text;
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using System.Web.Script.Serialization;
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using Asm65;
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using CommonUtil;
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namespace SourceGen {
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/// <summary>
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/// Data pseudo-op formatter. Long operands, notably strings and dense hex blocks, may
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/// be broken across multiple lines.
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///
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/// Assembler output will use Opcode and Operand, emitting multiple lines of ASC, HEX,
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/// etc. The display list may treat it as a single item that is split across
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/// multiple lines.
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/// </summary>
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public class PseudoOp {
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private const int MAX_OPERAND_LEN = 64;
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/// <summary>
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/// One piece of the pseudo-instruction.
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/// </summary>
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public struct PseudoOut {
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/// <summary>
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/// Opcode. Same for all entries in the list.
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/// </summary>
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public string Opcode { get; set; }
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/// <summary>
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/// Formatted form of this piece of the operand.
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/// </summary>
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public string Operand { get; set; }
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/// <summary>
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/// Copy constructor.
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/// </summary>
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public PseudoOut(PseudoOut src) {
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Opcode = src.Opcode;
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Operand = src.Operand;
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}
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}
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#region PseudoOpNames
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/// <summary>
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/// Pseudo-op name collection. Instances are immutable.
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/// </summary>
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public class PseudoOpNames {
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public string EquDirective { get; private set; }
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public string OrgDirective { get; private set; }
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public string RegWidthDirective { get; private set; }
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public string DefineData1 { get; private set; }
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public string DefineData2 { get; private set; }
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public string DefineData3 { get; private set; }
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public string DefineData4 { get; private set; }
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public string DefineBigData2 { get; private set; }
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public string DefineBigData3 { get; private set; }
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public string DefineBigData4 { get; private set; }
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public string Fill { get; private set; }
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public string Dense { get; private set; }
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public string StrGeneric { get; private set; }
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public string StrReverse { get; private set; }
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public string StrLen8 { get; private set; }
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public string StrLen16 { get; private set; }
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public string StrNullTerm { get; private set; }
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public string StrDci { get; private set; }
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/// <summary>
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/// Constructs an empty PseudoOp.
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/// </summary>
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public PseudoOpNames() : this(new Dictionary<string, string>()) {
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}
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/// <summary>
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/// Constructor. Pass in a dictionary with name/value pairs. Unknown names
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/// will be ignored, missing names will be assigned the empty string.
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/// </summary>
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/// <param name="dict">Dictionary of values.</param>
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public PseudoOpNames(Dictionary<string, string> dict) {
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foreach (PropertyInfo prop in GetType().GetProperties()) {
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dict.TryGetValue(prop.Name, out string value);
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if (value == null) {
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value = string.Empty;
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}
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prop.SetValue(this, value);
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}
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}
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public static bool operator ==(PseudoOpNames a, PseudoOpNames b) {
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if (ReferenceEquals(a, b)) {
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return true; // same object, or both null
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}
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if (ReferenceEquals(a, null) || ReferenceEquals(b, null)) {
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return false; // one is null
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}
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return a.EquDirective == b.EquDirective &&
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a.OrgDirective == b.OrgDirective &&
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a.RegWidthDirective == b.RegWidthDirective &&
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a.DefineData1 == b.DefineData1 &&
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a.DefineData2 == b.DefineData2 &&
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a.DefineData3 == b.DefineData3 &&
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a.DefineData4 == b.DefineData4 &&
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a.DefineBigData2 == b.DefineBigData2 &&
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a.DefineBigData3 == b.DefineBigData3 &&
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a.DefineBigData4 == b.DefineBigData4 &&
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a.Fill == b.Fill &&
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a.Dense == b.Dense &&
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a.StrGeneric == b.StrGeneric &&
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a.StrReverse == b.StrReverse &&
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a.StrLen8 == b.StrLen8 &&
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a.StrLen16 == b.StrLen16 &&
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a.StrNullTerm == b.StrNullTerm &&
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a.StrDci == b.StrDci;
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}
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public static bool operator !=(PseudoOpNames a, PseudoOpNames b) {
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return !(a == b);
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}
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public override bool Equals(object obj) {
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return obj is PseudoOpNames && this == (PseudoOpNames)obj;
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}
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public override int GetHashCode() {
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// should be enough
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return (EquDirective == null ? 0 : EquDirective.GetHashCode()) ^
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(OrgDirective == null ? 0 : OrgDirective.GetHashCode()) ^
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(DefineData1 == null ? 0 : DefineData1.GetHashCode()) ^
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(Fill == null ? 0 : Fill.GetHashCode());
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}
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public string GetDefineData(int width) {
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switch (width) {
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case 1: return DefineData1;
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case 2: return DefineData2;
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case 3: return DefineData3;
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case 4: return DefineData4;
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default: Debug.Assert(false); return ".?!!";
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}
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}
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public string GetDefineBigData(int width) {
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switch (width) {
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case 1: return DefineData1;
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case 2: return DefineBigData2;
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case 3: return DefineBigData3;
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case 4: return DefineBigData4;
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default: Debug.Assert(false); return ".!!?";
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}
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}
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/// <summary>
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/// Merges the non-null, non-empty strings.
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/// </summary>
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public static PseudoOpNames Merge(PseudoOpNames basePon, PseudoOpNames newPon) {
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Dictionary<string, string> baseDict = PropsToDict(basePon);
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Dictionary<string, string> newDict = PropsToDict(newPon);
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foreach (KeyValuePair<string, string> kvp in newDict) {
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if (string.IsNullOrEmpty(kvp.Value)) {
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continue;
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}
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baseDict[kvp.Key] = kvp.Value;
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}
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return new PseudoOpNames(baseDict);
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}
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private static Dictionary<string, string> PropsToDict(PseudoOpNames pon) {
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Dictionary<string, string> dict = new Dictionary<string, string>();
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foreach (PropertyInfo prop in pon.GetType().GetProperties()) {
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string value = (string)prop.GetValue(pon);
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if (!string.IsNullOrEmpty(value)) {
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dict[prop.Name] = value;
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}
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}
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return dict;
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}
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public string Serialize() {
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// This results in a JSON-encoded string being stored in a JSON-encoded file,
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// which means a lot of double-quote escaping. We could do something here
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// that stored more nicely but it doesn't seem worth the effort.
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JavaScriptSerializer ser = new JavaScriptSerializer();
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Dictionary<string, string> dict = PropsToDict(this);
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return ser.Serialize(dict);
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}
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public static PseudoOpNames Deserialize(string cereal) {
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JavaScriptSerializer ser = new JavaScriptSerializer();
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try {
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Dictionary<string, string> dict =
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ser.Deserialize<Dictionary<string, string>>(cereal);
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return new PseudoOpNames(dict);
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} catch (Exception ex) {
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Debug.WriteLine("PseudoOpNames deserialization failed: " + ex.Message);
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return new PseudoOpNames();
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}
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}
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}
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/// <summary>
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/// Returns a PseudoOpNames instance with some reasonable defaults for on-screen display.
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/// </summary>
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public static PseudoOpNames DefaultPseudoOpNames {
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get { return sDefaultPseudoOpNames; }
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}
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private static readonly PseudoOpNames sDefaultPseudoOpNames =
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new PseudoOpNames(new Dictionary<string, string> {
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{ "EquDirective", ".eq" },
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{ "OrgDirective", ".org" },
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{ "RegWidthDirective", ".rwid" },
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{ "DefineData1", ".dd1" },
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{ "DefineData2", ".dd2" },
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{ "DefineData3", ".dd3" },
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{ "DefineData4", ".dd4" },
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{ "DefineBigData2", ".dbd2" },
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{ "DefineBigData3", ".dbd3" },
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{ "DefineBigData4", ".dbd4" },
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{ "Fill", ".fill" },
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{ "Dense", ".bulk" },
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{ "StrGeneric", ".str" },
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{ "StrReverse", ".rstr" },
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{ "StrLen8", ".l1str" },
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{ "StrLen16", ".l2str" },
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{ "StrNullTerm", ".zstr" },
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{ "StrDci", ".dstr" }
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});
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#endregion PseudoOpNames
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/// <summary>
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/// Computes the number of lines of output required to hold the formatted output.
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/// </summary>
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/// <param name="formatter">Format definition.</param>
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/// <param name="dfd">Data format descriptor.</param>
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/// <returns>Line count.</returns>
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public static int ComputeRequiredLineCount(Formatter formatter, PseudoOpNames opNames,
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FormatDescriptor dfd, byte[] data, int offset) {
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if (dfd.IsString) {
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Debug.Assert(false); // shouldn't be calling here anymore
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List<string> lines = FormatStringOp(formatter, opNames, dfd, data,
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offset, out string popcode);
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return lines.Count;
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}
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switch (dfd.FormatType) {
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case FormatDescriptor.Type.Default:
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case FormatDescriptor.Type.NumericLE:
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case FormatDescriptor.Type.NumericBE:
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case FormatDescriptor.Type.Fill:
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return 1;
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case FormatDescriptor.Type.Dense: {
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// no delimiter, two output bytes per input byte
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int maxLen = MAX_OPERAND_LEN;
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int textLen = dfd.Length * 2;
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return (textLen + maxLen - 1) / maxLen;
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}
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default:
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Debug.Assert(false);
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return 1;
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}
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}
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/// <summary>
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/// Generates a pseudo-op statement for the specified data operation.
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///
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/// For most operations, only one output line will be generated. For larger items,
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/// like dense hex, the value may be split into multiple lines. The sub-index
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/// indicates which line should be formatted.
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/// </summary>
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/// <param name="formatter">Format definition.</param>
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/// <param name="opNames">Table of pseudo-op names.</param>
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/// <param name="symbolTable">Project symbol table.</param>
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/// <param name="labelMap">Symbol label map. May be null.</param>
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/// <param name="dfd">Data format descriptor.</param>
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/// <param name="data">File data array.</param>
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/// <param name="offset">Start offset.</param>
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/// <param name="subIndex">For multi-line items, which line.</param>
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public static PseudoOut FormatDataOp(Formatter formatter, PseudoOpNames opNames,
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SymbolTable symbolTable, Dictionary<string, string> labelMap,
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FormatDescriptor dfd, byte[] data, int offset, int subIndex) {
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if (dfd == null) {
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// should never happen
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//Debug.Assert(false, "Null dfd at offset+" + offset.ToString("x6"));
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PseudoOut failed = new PseudoOut();
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failed.Opcode = failed.Operand = "!FAILED!+" + offset.ToString("x6");
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return failed;
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}
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int length = dfd.Length;
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Debug.Assert(length > 0);
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// All outputs for a given offset show the same offset and length, even for
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// multi-line items.
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PseudoOut po = new PseudoOut();
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if (dfd.IsString) {
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Debug.Assert(false); // shouldn't be calling here anymore
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List<string> lines = FormatStringOp(formatter, opNames, dfd, data,
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offset, out string popcode);
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po.Opcode = popcode;
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po.Operand = lines[subIndex];
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} else {
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switch (dfd.FormatType) {
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case FormatDescriptor.Type.Default:
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if (length != 1) {
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// This shouldn't happen.
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Debug.Assert(false);
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length = 1;
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}
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po.Opcode = opNames.GetDefineData(length);
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int operand = RawData.GetWord(data, offset, length, false);
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po.Operand = formatter.FormatHexValue(operand, length * 2);
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break;
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case FormatDescriptor.Type.NumericLE:
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po.Opcode = opNames.GetDefineData(length);
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operand = RawData.GetWord(data, offset, length, false);
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po.Operand = FormatNumericOperand(formatter, symbolTable, labelMap, dfd,
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operand, length, FormatNumericOpFlags.None);
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break;
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case FormatDescriptor.Type.NumericBE:
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po.Opcode = opNames.GetDefineBigData(length);
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operand = RawData.GetWord(data, offset, length, true);
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po.Operand = FormatNumericOperand(formatter, symbolTable, labelMap, dfd,
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operand, length, FormatNumericOpFlags.None);
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break;
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case FormatDescriptor.Type.Fill:
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po.Opcode = opNames.Fill;
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po.Operand = length + "," + formatter.FormatHexValue(data[offset], 2);
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break;
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case FormatDescriptor.Type.Dense: {
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int maxPerLine = MAX_OPERAND_LEN / 2;
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offset += subIndex * maxPerLine;
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length -= subIndex * maxPerLine;
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if (length > maxPerLine) {
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length = maxPerLine;
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}
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po.Opcode = opNames.Dense;
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po.Operand = formatter.FormatDenseHex(data, offset, length);
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//List<PseudoOut> outList = new List<PseudoOut>();
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//GenerateTextLines(text, "", "", po, outList);
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//po = outList[subIndex];
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}
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break;
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default:
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Debug.Assert(false);
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po.Opcode = ".???";
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po.Operand = "$" + data[offset].ToString("x2");
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break;
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}
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}
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return po;
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}
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/// <summary>
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/// Converts a collection of bytes that represent a string into an array of formatted
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/// string operands.
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/// </summary>
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/// <param name="formatter">Formatter object.</param>
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/// <param name="opNames">Pseudo-opcode name table.</param>
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/// <param name="dfd">Format descriptor.</param>
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/// <param name="data">File data.</param>
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/// <param name="offset">Offset, within data, of start of string.</param>
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/// <param name="popcode">Pseudo-opcode string.</param>
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/// <returns>Array of operand strings.</returns>
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public static List<string> FormatStringOp(Formatter formatter, PseudoOpNames opNames,
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FormatDescriptor dfd, byte[] data, int offset, out string popcode) {
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int hiddenLeadingBytes = 0;
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int trailingBytes = 0;
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StringOpFormatter.ReverseMode revMode = StringOpFormatter.ReverseMode.Forward;
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Formatter.DelimiterSet delSet = formatter.Config.mStringDelimiters;
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Formatter.DelimiterDef delDef;
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CharEncoding.Convert charConv;
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switch (dfd.FormatSubType) {
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case FormatDescriptor.SubType.Ascii:
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if (dfd.FormatType == FormatDescriptor.Type.StringDci) {
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charConv = CharEncoding.ConvertLowAndHighAscii;
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} else {
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charConv = CharEncoding.ConvertAscii;
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}
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delDef = delSet.Get(CharEncoding.Encoding.Ascii);
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break;
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case FormatDescriptor.SubType.HighAscii:
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if (dfd.FormatType == FormatDescriptor.Type.StringDci) {
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charConv = CharEncoding.ConvertLowAndHighAscii;
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} else {
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charConv = CharEncoding.ConvertHighAscii;
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}
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delDef = delSet.Get(CharEncoding.Encoding.HighAscii);
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break;
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case FormatDescriptor.SubType.C64Petscii:
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if (dfd.FormatType == FormatDescriptor.Type.StringDci) {
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charConv = CharEncoding.ConvertLowAndHighC64Petscii;
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} else {
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charConv = CharEncoding.ConvertC64Petscii;
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}
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delDef = delSet.Get(CharEncoding.Encoding.C64Petscii);
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break;
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case FormatDescriptor.SubType.C64Screen:
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if (dfd.FormatType == FormatDescriptor.Type.StringDci) {
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charConv = CharEncoding.ConvertLowAndHighC64ScreenCode;
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} else {
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charConv = CharEncoding.ConvertC64ScreenCode;
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}
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delDef = delSet.Get(CharEncoding.Encoding.C64ScreenCode);
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break;
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default:
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Debug.Assert(false);
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charConv = CharEncoding.ConvertAscii;
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delDef = delSet.Get(CharEncoding.Encoding.Ascii);
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break;
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}
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if (delDef == null) {
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delDef = Formatter.DOUBLE_QUOTE_DELIM;
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}
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switch (dfd.FormatType) {
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case FormatDescriptor.Type.StringGeneric:
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// Generic character data.
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popcode = opNames.StrGeneric;
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break;
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case FormatDescriptor.Type.StringReverse:
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// Character data, full width specified by formatter. Show characters
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// in reverse order.
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popcode = opNames.StrReverse;
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revMode = StringOpFormatter.ReverseMode.FullReverse;
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break;
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case FormatDescriptor.Type.StringNullTerm:
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// Character data with a terminating null. Don't show the null byte.
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popcode = opNames.StrNullTerm;
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trailingBytes = 1;
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//if (strLen == 0) {
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// showHexZeroes = 1;
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//}
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break;
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case FormatDescriptor.Type.StringL8:
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// Character data with a leading length byte. Don't show the length.
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hiddenLeadingBytes = 1;
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//if (strLen == 0) {
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// showHexZeroes = 1;
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//}
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popcode = opNames.StrLen8;
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break;
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case FormatDescriptor.Type.StringL16:
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// Character data with a leading length word. Don't show the length.
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Debug.Assert(dfd.Length > 1);
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hiddenLeadingBytes = 2;
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//if (strLen == 0) {
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// showHexZeroes = 2;
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//}
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popcode = opNames.StrLen16;
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break;
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case FormatDescriptor.Type.StringDci:
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// High bit on last byte is flipped.
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popcode = opNames.StrDci;
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break;
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default:
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Debug.Assert(false);
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popcode = ".!!!";
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break;
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}
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StringOpFormatter stropf = new StringOpFormatter(formatter, delDef,
|
|
StringOpFormatter.RawOutputStyle.CommaSep, MAX_OPERAND_LEN, charConv);
|
|
stropf.FeedBytes(data, offset + hiddenLeadingBytes,
|
|
dfd.Length - hiddenLeadingBytes - trailingBytes, 0, revMode);
|
|
|
|
return stropf.Lines;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Special formatting flags for the FormatNumericOperand() method.
|
|
/// </summary>
|
|
public enum FormatNumericOpFlags {
|
|
None = 0,
|
|
IsPcRel, // opcode is PC relative, e.g. branch or PER
|
|
HasHashPrefix, // operand has a leading '#', avoiding ambiguity in some cases
|
|
}
|
|
|
|
public static CharEncoding.Encoding SubTypeToEnc(FormatDescriptor.SubType subType) {
|
|
switch (subType) {
|
|
case FormatDescriptor.SubType.Ascii:
|
|
return CharEncoding.Encoding.Ascii;
|
|
case FormatDescriptor.SubType.HighAscii:
|
|
return CharEncoding.Encoding.HighAscii;
|
|
case FormatDescriptor.SubType.C64Petscii:
|
|
return CharEncoding.Encoding.C64Petscii;
|
|
case FormatDescriptor.SubType.C64Screen:
|
|
return CharEncoding.Encoding.C64ScreenCode;
|
|
default:
|
|
return CharEncoding.Encoding.Unknown;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format a numeric operand value according to the specified sub-format.
|
|
/// </summary>
|
|
/// <param name="formatter">Text formatter.</param>
|
|
/// <param name="symbolTable">Full table of project symbols.</param>
|
|
/// <param name="labelMap">Symbol label remap, for local label conversion. May be
|
|
/// null.</param>
|
|
/// <param name="dfd">Operand format descriptor.</param>
|
|
/// <param name="operandValue">Operand's value. For most things this comes directly
|
|
/// out of the code, for relative branches it's a 24-bit absolute address.</param>
|
|
/// <param name="operandLen">Length of operand, in bytes. For an instruction, this
|
|
/// does not include the opcode byte. For a relative branch, this will be 2.</param>
|
|
/// <param name="flags">Special handling.</param>
|
|
public static string FormatNumericOperand(Formatter formatter, SymbolTable symbolTable,
|
|
Dictionary<string, string> labelMap, FormatDescriptor dfd,
|
|
int operandValue, int operandLen, FormatNumericOpFlags flags) {
|
|
Debug.Assert(operandLen > 0);
|
|
int hexMinLen = operandLen * 2;
|
|
|
|
switch (dfd.FormatSubType) {
|
|
case FormatDescriptor.SubType.None:
|
|
case FormatDescriptor.SubType.Hex:
|
|
case FormatDescriptor.SubType.Address:
|
|
return formatter.FormatHexValue(operandValue, hexMinLen);
|
|
case FormatDescriptor.SubType.Decimal:
|
|
return formatter.FormatDecimalValue(operandValue);
|
|
case FormatDescriptor.SubType.Binary:
|
|
return formatter.FormatBinaryValue(operandValue, hexMinLen * 4);
|
|
case FormatDescriptor.SubType.Ascii:
|
|
case FormatDescriptor.SubType.HighAscii:
|
|
case FormatDescriptor.SubType.C64Petscii:
|
|
case FormatDescriptor.SubType.C64Screen:
|
|
CharEncoding.Encoding enc = SubTypeToEnc(dfd.FormatSubType);
|
|
return formatter.FormatCharacterValue(operandValue, enc);
|
|
case FormatDescriptor.SubType.Symbol:
|
|
if (symbolTable.TryGetValue(dfd.SymbolRef.Label, out Symbol sym)) {
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
switch (formatter.ExpressionMode) {
|
|
case Formatter.FormatConfig.ExpressionMode.Common:
|
|
FormatNumericSymbolCommon(formatter, sym, labelMap,
|
|
dfd, operandValue, operandLen, flags, sb);
|
|
break;
|
|
case Formatter.FormatConfig.ExpressionMode.Cc65:
|
|
FormatNumericSymbolCc65(formatter, sym, labelMap,
|
|
dfd, operandValue, operandLen, flags, sb);
|
|
break;
|
|
case Formatter.FormatConfig.ExpressionMode.Merlin:
|
|
FormatNumericSymbolMerlin(formatter, sym, labelMap,
|
|
dfd, operandValue, operandLen, flags, sb);
|
|
break;
|
|
default:
|
|
Debug.Assert(false, "Unknown expression mode " +
|
|
formatter.ExpressionMode);
|
|
return "???";
|
|
}
|
|
|
|
return sb.ToString();
|
|
} else {
|
|
return formatter.FormatHexValue(operandValue, hexMinLen);
|
|
}
|
|
default:
|
|
// should not see REMOVE or ASCII_GENERIC here
|
|
Debug.Assert(false);
|
|
return "???";
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format the symbol and adjustment using common expression syntax.
|
|
/// </summary>
|
|
private static void FormatNumericSymbolCommon(Formatter formatter, Symbol sym,
|
|
Dictionary<string, string> labelMap, FormatDescriptor dfd,
|
|
int operandValue, int operandLen, FormatNumericOpFlags flags, StringBuilder sb) {
|
|
// We could have some simple code that generated correct output, shifting and
|
|
// masking every time, but that's ugly and annoying. For single-byte ops we can
|
|
// just use the byte-select operators, for wider ops we get only as fancy as we
|
|
// need to be.
|
|
|
|
int adjustment, symbolValue;
|
|
|
|
string symLabel = sym.Label;
|
|
if (labelMap != null && labelMap.TryGetValue(symLabel, out string newLabel)) {
|
|
symLabel = newLabel;
|
|
}
|
|
|
|
if (operandLen == 1) {
|
|
// Use the byte-selection operator to get the right piece. In 64tass the
|
|
// selection operator has a very low precedence, similar to Merlin 32.
|
|
string selOp;
|
|
if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.Bank) {
|
|
symbolValue = (sym.Value >> 16) & 0xff;
|
|
if (formatter.Config.mBankSelectBackQuote) {
|
|
selOp = "`";
|
|
} else {
|
|
selOp = "^";
|
|
}
|
|
} else if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.High) {
|
|
symbolValue = (sym.Value >> 8) & 0xff;
|
|
selOp = ">";
|
|
} else {
|
|
symbolValue = sym.Value & 0xff;
|
|
if (symbolValue == sym.Value) {
|
|
selOp = string.Empty;
|
|
} else {
|
|
selOp = "<";
|
|
}
|
|
}
|
|
|
|
operandValue &= 0xff;
|
|
|
|
if (operandValue != symbolValue &&
|
|
dfd.SymbolRef.ValuePart != WeakSymbolRef.Part.Low) {
|
|
// Adjustment is required to an upper-byte part.
|
|
sb.Append('(');
|
|
sb.Append(selOp);
|
|
sb.Append(symLabel);
|
|
sb.Append(')');
|
|
} else {
|
|
// no adjustment required
|
|
sb.Append(selOp);
|
|
sb.Append(symLabel);
|
|
}
|
|
} else if (operandLen <= 4) {
|
|
// Operands and values should be 8/16/24 bit unsigned quantities. 32-bit
|
|
// support is really there so you can have a 24-bit pointer in a 32-bit hole.
|
|
// Might need to adjust this if 32-bit signed quantities become interesting.
|
|
uint mask = 0xffffffff >> ((4 - operandLen) * 8);
|
|
int rightShift;
|
|
if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.Bank) {
|
|
symbolValue = (sym.Value >> 16);
|
|
rightShift = 16;
|
|
} else if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.High) {
|
|
symbolValue = (sym.Value >> 8);
|
|
rightShift = 8;
|
|
} else {
|
|
symbolValue = sym.Value;
|
|
rightShift = 0;
|
|
}
|
|
|
|
if (flags == FormatNumericOpFlags.IsPcRel) {
|
|
// PC-relative operands are funny, because an 8- or 16-bit value is always
|
|
// expanded to 24 bits. We output a 16-bit value that the assembler will
|
|
// convert back to 8-bit or 16-bit. In any event, the bank byte is never
|
|
// relevant to our computations.
|
|
operandValue &= 0xffff;
|
|
symbolValue &= 0xffff;
|
|
}
|
|
|
|
bool needMask = false;
|
|
if (symbolValue > mask) {
|
|
// Post-shift value won't fit in an operand-size box.
|
|
symbolValue = (int) (symbolValue & mask);
|
|
needMask = true;
|
|
}
|
|
|
|
operandValue = (int)(operandValue & mask);
|
|
|
|
// Generate one of:
|
|
// label [+ adj]
|
|
// (label >> rightShift) [+ adj]
|
|
// (label & mask) [+ adj]
|
|
// ((label >> rightShift) & mask) [+ adj]
|
|
|
|
if (rightShift != 0 || needMask) {
|
|
if (flags != FormatNumericOpFlags.HasHashPrefix) {
|
|
sb.Append("0+");
|
|
}
|
|
if (rightShift != 0 && needMask) {
|
|
sb.Append("((");
|
|
} else {
|
|
sb.Append("(");
|
|
}
|
|
}
|
|
sb.Append(symLabel);
|
|
|
|
if (rightShift != 0) {
|
|
sb.Append(" >> ");
|
|
sb.Append(rightShift.ToString());
|
|
sb.Append(')');
|
|
}
|
|
|
|
if (needMask) {
|
|
sb.Append(" & ");
|
|
sb.Append(formatter.FormatHexValue((int)mask, 2));
|
|
sb.Append(')');
|
|
}
|
|
} else {
|
|
Debug.Assert(false, "bad numeric len");
|
|
sb.Append("?????");
|
|
symbolValue = 0;
|
|
}
|
|
|
|
adjustment = operandValue - symbolValue;
|
|
|
|
sb.Append(formatter.FormatAdjustment(adjustment));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format the symbol and adjustment using cc65 expression syntax.
|
|
/// </summary>
|
|
private static void FormatNumericSymbolCc65(Formatter formatter, Symbol sym,
|
|
Dictionary<string, string> labelMap, FormatDescriptor dfd,
|
|
int operandValue, int operandLen, FormatNumericOpFlags flags, StringBuilder sb) {
|
|
// The key difference between cc65 and other assemblers with general expressions
|
|
// is that the bitwise shift and AND operators have higher precedence than the
|
|
// arithmetic ops like add and subtract. (The bitwise ops are equal to multiply
|
|
// and divide.) This means that, if we want to mask off the low 16 bits and add one
|
|
// to a label, we can write "start & $ffff + 1" rather than "(start & $ffff) + 1".
|
|
//
|
|
// This is particularly convenient for PEA, since "PEA (start & $ffff)" looks like
|
|
// we're trying to use a (non-existent) indirect form of PEA. We can write things
|
|
// in a simpler way.
|
|
|
|
int adjustment, symbolValue;
|
|
|
|
string symLabel = sym.Label;
|
|
if (labelMap != null && labelMap.TryGetValue(symLabel, out string newLabel)) {
|
|
symLabel = newLabel;
|
|
}
|
|
|
|
if (operandLen == 1) {
|
|
// Use the byte-selection operator to get the right piece.
|
|
string selOp;
|
|
if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.Bank) {
|
|
symbolValue = (sym.Value >> 16) & 0xff;
|
|
selOp = "^";
|
|
} else if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.High) {
|
|
symbolValue = (sym.Value >> 8) & 0xff;
|
|
selOp = ">";
|
|
} else {
|
|
symbolValue = sym.Value & 0xff;
|
|
if (symbolValue == sym.Value) {
|
|
selOp = string.Empty;
|
|
} else {
|
|
selOp = "<";
|
|
}
|
|
}
|
|
sb.Append(selOp);
|
|
sb.Append(symLabel);
|
|
|
|
operandValue &= 0xff;
|
|
} else if (operandLen <= 4) {
|
|
uint mask = 0xffffffff >> ((4 - operandLen) * 8);
|
|
string shOp;
|
|
if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.Bank) {
|
|
symbolValue = (sym.Value >> 16);
|
|
shOp = " >> 16";
|
|
} else if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.High) {
|
|
symbolValue = (sym.Value >> 8);
|
|
shOp = " >> 8";
|
|
} else {
|
|
symbolValue = sym.Value;
|
|
shOp = "";
|
|
}
|
|
|
|
if (flags == FormatNumericOpFlags.IsPcRel) {
|
|
// PC-relative operands are funny, because an 8- or 16-bit value is always
|
|
// expanded to 24 bits. We output a 16-bit value that the assembler will
|
|
// convert back to 8-bit or 16-bit. In any event, the bank byte is never
|
|
// relevant to our computations.
|
|
operandValue &= 0xffff;
|
|
symbolValue &= 0xffff;
|
|
}
|
|
|
|
sb.Append(symLabel);
|
|
sb.Append(shOp);
|
|
if (symbolValue > mask) {
|
|
// Post-shift value won't fit in an operand-size box.
|
|
symbolValue = (int)(symbolValue & mask);
|
|
sb.Append(" & ");
|
|
sb.Append(formatter.FormatHexValue((int)mask, 2));
|
|
}
|
|
operandValue = (int)(operandValue & mask);
|
|
|
|
if (sb.Length != symLabel.Length) {
|
|
sb.Append(' ');
|
|
}
|
|
} else {
|
|
Debug.Assert(false, "bad numeric len");
|
|
sb.Append("?????");
|
|
symbolValue = 0;
|
|
}
|
|
|
|
adjustment = operandValue - symbolValue;
|
|
|
|
sb.Append(formatter.FormatAdjustment(adjustment));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Format the symbol and adjustment using Merlin expression syntax.
|
|
/// </summary>
|
|
private static void FormatNumericSymbolMerlin(Formatter formatter, Symbol sym,
|
|
Dictionary<string, string> labelMap, FormatDescriptor dfd,
|
|
int operandValue, int operandLen, FormatNumericOpFlags flags, StringBuilder sb) {
|
|
// Merlin expressions are compatible with the original 8-bit Merlin. They're
|
|
// evaluated from left to right, with (almost) no regard for operator precedence.
|
|
//
|
|
// The part-selection operators differ from "simple" in two ways:
|
|
// (1) They always happen last. If FOO=$10f0, "#>FOO+$18" == $11. One of the
|
|
// few cases where left-to-right evaluation is overridden.
|
|
// (2) They select words, not bytes. If FOO=$123456, "#>FOO" is $1234. This is
|
|
// best thought of as a shift operator, rather than byte-selection. For
|
|
// 8-bit code this doesn't matter.
|
|
//
|
|
// This behavior leads to simpler expressions for simple symbol adjustments.
|
|
|
|
string symLabel = sym.Label;
|
|
if (labelMap != null && labelMap.TryGetValue(symLabel, out string newLabel)) {
|
|
symLabel = newLabel;
|
|
}
|
|
|
|
int adjustment;
|
|
|
|
// If we add or subtract an adjustment, it will be done on the full value, which
|
|
// is then shifted to the appropriate part. So we need to left-shift the operand
|
|
// value to match. We fill in the low bytes with the contents of the symbol, so
|
|
// that the adjustment doesn't include unnecessary values. (For example, let
|
|
// FOO=$10f0, with operand "#>FOO" ($10). We shift the operand to get $1000, then
|
|
// OR in the low byte to get $10f0, so that when we subtract we get adjustment==0.)
|
|
int adjOperand, keepLen;
|
|
if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.Bank) {
|
|
adjOperand = operandValue << 16 | (int)(sym.Value & 0xff00ffff);
|
|
keepLen = 3;
|
|
} else if (dfd.SymbolRef.ValuePart == WeakSymbolRef.Part.High) {
|
|
adjOperand = (operandValue << 8) | (sym.Value & 0xff);
|
|
keepLen = 2;
|
|
} else {
|
|
adjOperand = operandValue;
|
|
keepLen = 1;
|
|
}
|
|
|
|
keepLen = Math.Max(keepLen, operandLen);
|
|
adjustment = adjOperand - sym.Value;
|
|
if (keepLen == 1) {
|
|
adjustment %= 256;
|
|
// Adjust for aesthetics. The assembler implicitly applies a modulo operation,
|
|
// so we can use the value closest to zero.
|
|
if (adjustment > 127) {
|
|
adjustment = -(256 - adjustment) /*% 256*/;
|
|
} else if (adjustment < -128) {
|
|
adjustment = (256 + adjustment) /*% 256*/;
|
|
}
|
|
} else if (keepLen == 2) {
|
|
adjustment %= 65536;
|
|
if (adjustment > 32767) {
|
|
adjustment = -(65536 - adjustment) /*% 65536*/;
|
|
} else if (adjustment < -32768) {
|
|
adjustment = (65536 + adjustment) /*% 65536*/;
|
|
}
|
|
}
|
|
|
|
// Use the label from sym, not dfd's weak ref; might be different if label
|
|
// comparisons are case-insensitive.
|
|
switch (dfd.SymbolRef.ValuePart) {
|
|
case WeakSymbolRef.Part.Unknown:
|
|
case WeakSymbolRef.Part.Low:
|
|
// For Merlin, "<" is effectively a no-op. We can put it in for
|
|
// aesthetics when grabbing the low byte of a 16-bit value.
|
|
if ((operandLen == 1) && sym.Value > 0xff) {
|
|
sb.Append('<');
|
|
}
|
|
sb.Append(symLabel);
|
|
break;
|
|
case WeakSymbolRef.Part.High:
|
|
sb.Append('>');
|
|
sb.Append(symLabel);
|
|
break;
|
|
case WeakSymbolRef.Part.Bank:
|
|
sb.Append('^');
|
|
sb.Append(symLabel);
|
|
break;
|
|
default:
|
|
Debug.Assert(false, "bad part");
|
|
sb.Append("???");
|
|
break;
|
|
}
|
|
|
|
sb.Append(formatter.FormatAdjustment(adjustment));
|
|
}
|
|
}
|
|
}
|