TODO list. Prepared next release (for tomorrow).

Extended documentation.
Bugfix in M68kDeadWriteInspection.

README.md

@@ -2,7 +2,7 @@
 
 _MC68000 Assembly Language Plugin_ is plugin for Jetbrains IDEs (CLion, IntelliJ, etc.).
 
-![Example Syntax Highlighting](docs/syntaxhighlighting.png "Example Syntax Highlighting")
+![Example IDE Screenshot](docs/example.png "Example IDE Screenshot")
 
 ## Purpose
 
@@ -19,13 +19,13 @@ awesome features and is pretty advanced. Check it out. You can install both plug
 
 Big kudos to Yann -- a few features were _inspired_ by his code.
 
-My plugin, on the other hand, is still pretty basic and is the result of about two weeks of work. I released a really early first version it because I think
-it's "good enough" to get started, and I can return to demo coding with its current state.
+My plugin, on the other hand, is still pretty basic and is the result of a few weeks of work. I released a really early first version it because I think it's "
+good enough" to get started, and I can return to demo coding with its current state.
 
 ## Features
 
 - Parser / Lexer for MC68000 (yes, only 68000 right now!) assembly language files in VAsm / DevPac style
-- Inspection for validating the syntax the 68000 ISA.
+- Inspection for validating the syntax of the 68000 ISA.
 - Syntax highlighting and Color Settings Page (you should really modify the color settings to your likings!)
 - Mnemonics code completion
 - Symbols / Labels / Macros code completion
@@ -37,6 +37,70 @@ it's "good enough" to get started, and I can return to demo coding with its curr
 - Structure view
 - Documentation provider for symbol definitions and mnemonics (listing available addressing modes etc.).
 
+### Inspections
+
+#### M68kSyntaxInspection - Assembly instruction validity
+
+Checks the validity of the current instruction. If an instruction is not recognized, you may get one of the following errors:
+
+- Instruction _mnemonic_ not supported on selected cpu (you won't get this currently as only MC68000 is supported)
+- No operands expected for _mnemonic_
+- Second operand _op_ unexpected for _mnemonic_
+- Unsupported addressing mode for _mnemonic_
+- Unsupported addressing mode _op_ for first operand of _mnemonic_
+- Unsupported addressing mode _op_ for second operand of _mnemonic_
+- Unsupported addressing modes for operands in this order for _mnemonic_ (try swapping)
+- Instruction _mnemonic_ is unsized (you tried to specify `.b`, `.w` or `.l`)
+- Operation size _(.b,.w,.l)_ unsupported for _mnemonic_
+- Operation size _(.b,.w,.l)_ unsupported (should be _(.b,.w,.l)_)
+
+#### M68kDeadWriteInspection - Dead writes to registers
+
+This inspection looks at register writes and tries to find instructions that renders a write moot because it was overwritten by another instruction before
+anything useful was done with it.
+
+Analysis is aborted at global labels, flow control instructions, directives
+(e.g. conditional assembly) and macros with the register names as parameter.
+
+The inspection tries to take condition code changing into account and puts out a weak warning if the statement merely changes condition codes before the
+contents of the register are overwritten. In this case, it is sometimes better to replace `move` by `tst`.
+
+#### M68kUnexpectedConditionalInstructionInspection - Unaffected condition codes before conditional instruction
+
+Especially for novice coders, it is not clear that some instructions do not affect the condition codes for a subsequent condition branch or `scc` instruction.
+`movea`, `adda` and `suba` come to my mind.
+
+The inspection will report such suspicious instruction sequences.
+
+However, this does not need to be a programming error. Advanced coders sometimes make use of the fact that instructions do not change condition codes and thus
+optimize the order of execution.
+
+### Documentation provider
+
+#### M68kSymbolDefinitionDocumentationProvider
+
+Provides the assigned value of a `=`, `set` or `equ` symbol definition when hovering over a symbol.
+
+#### M68kRegisterFlowDocumentationProvider
+
+When hovering over or placing the cursor at a data or address register, the documentation will scan through the instructions backwards and forwards and will
+show all read, changes of the register contents. It does this until an instruction is found that defines (sets) the contents of the register
+(according to the size of the instruction where the cursor was placed).
+
+The analysis ignores all code flow instructions and might be inaccurate for branches, macro use, etc. It also stops at global labels.
+
+The documentation will search up to 100 instructions in each direction, but only four when hovering over the register
+(so if you need the whole analysis, use the documentation window).
+
+#### M68kInstructionDocumentationProvider
+
+When hovering over a mnemonic, it will show a short description of the assembly instruction.
+
+For the documentation window, affected condition codes, allowed operation sizes and addressing modes are listed for the selected instruction
+(so only stuff from `cmpa` is listed when you're looking at a `cmp.w a0,a1` instruction).
+
+If the current statement has no valid syntax, the instruction details of all matching mnemonics will be shown instead.
+
 ## Known issues
 
 - `Find Usages` always shows _"Unclassified"_ though it shouldn't (?)
@@ -46,13 +110,13 @@ it's "good enough" to get started, and I can return to demo coding with its curr
 - While the Lexer supports the -spaces option (where a space introduces a comment), this cannot be configured yet (default is off).
 - No support for other processor instructions, FPU or 68020+ address modes.
 - Unit Test coverage is not as good as it could be (ahem).
-- `opt` keyword needs special treatment and will currently show a parsing error
+- `opt` keyword needs special treatment and will currently show a parsing error.
 - Missing but planned features:
     - Macro evaluation on invocation
     - Folding
-    - Semantic inspections
+    - More semantic inspections
     - Quick fixes
-    - Formatter + Code Style Settings
+    - Maybe formatter + Code Style Settings
     - Register use analysis (but this only makes sense after macro evaluation)
     - Cycle counting
 
@@ -69,8 +133,29 @@ It is probably the only plugin (besides [Cajon](https://github.com/chrisly42/caj
 far (or at least the only one I'm aware of ;) ). The IntelliJ framework actually uses the JUnit 3 TestCase for plugin testing, and it took me quite a while to
 make it work with JUnit 5. Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for your projects (with attribution).
 
+## Private TODO list
+
+- code completion suggestion for unresolved local labels, global labels and symbols
+- support `include` directive
+- support `opt` directive
+- suppression support via comments
+- inspection: Unresolved local label
+- inspection: Unresolved macro
+
 ## Changelog
 
+### V0.5 (06-Aug-21)
+
+- Bugfix: `movem` ISA was wrong regarding the `movem.w <ea>,<registerlist>` (sign extends registers).
+- Cosmetics: Changed Register Flow Documentation wording from _reads_ to _uses_ and from _modifies_ to _changes_.
+- Bugfix: Minor fix for `andi/eori/ori to ccr` which were not byte sized in ISA.
+- Bugfix: Added alternate condition code tests `HS (=CC)` and `LO (=CS)`.
+- Performance: Optimized mnemonic lookup.
+- Enhancement: Reworked Instruction Documentation provider, now shows condition codes.
+- Bugfix: In ISA `exg` is no longer treated as setting a definitive value.
+- New: Added inspection to find dead writes to registers!
+- New: Added inspection to warn about unexpected condition code unaffecting instructions before conditional instructions.
+
 ### V0.4 (03-Aug-21)
 
 - Notice: Due to major new API use, this plugin no longer works on IDEs >=2019.3.1, but rather requires >=2020.3.

build.gradle

@@ -7,7 +7,7 @@ plugins {
 }
 
 group = 'de.platon42'
-version = '0.4'
+version = '0.5'
 sourceCompatibility = "1.8"
 targetCompatibility = "1.8"
 
@@ -57,6 +57,18 @@ runPluginVerifier {
 
 patchPluginXml {
     setChangeNotes("""
+  <h4>V0.5 (06-Aug-21)</h4>
+    <ul>
+      <li>Bugfix: movem ISA was wrong regarding movem.w <ea>,<registerlist> (sign extends registers).
+      <li>Cosmetics: Changed Register Flow Documentation wording from 'reads' to 'uses' and from 'modifies' to 'changes'.
+      <li>Bugfix: Minor fix for `andi/eori/ori to ccr` which were not byte sized in ISA.
+      <li>Bugfix: Added alternate condition code tests HS (=CC) and LO (=CS).
+      <li>Performance: Optimized mnemonic lookup.
+      <li>Enhancement: Reworked Instruction Documentation provider, now shows condition codes.
+      <li>Bugfix: In ISA exg is no longer treated as setting a definitive value.
+      <li>New: Added inspection to find dead writes to registers!
+      <li>New: Added inspection to warn about unexpected condition code unaffecting instructions before conditional instructions.
+    </ul>
   <h4>V0.4 (03-Aug-21)</h4>
     <ul>
       <li>Notice: Due to major new API use, this plugin no longer works on IDEs >=2019.3.1, but rather requires >=2020.3.
@@ -70,26 +82,6 @@ patchPluginXml {
       <li>Bugfix: Macro definitions with colons and without space supported (as found in P61a source).
       <li>New: When asking for documentation on registers, a code flow analysis is done. Cool stuff!
     </ul>
-  <h4>V0.3 (28-Jul-21)</h4>
-    <ul>
-      <li>Enhancement: Macro contents are no longer parsed, added syntax highlighting options for macros.
-      <li>Enhancement: Macro definitions are now word and stub indexed, macro calls reference to definition.
-      <li>New: Macro definition refactoring and find usages support.
-      <li>Enhancement: Structural View also shows macro definitions. 
-      <li>Bugfix: Missing REPT and ENDR assembler directives added.
-      <li>Cosmetics: Changed or added some icons at various places.
-      <li>Performance: Reference search for global labels and symbols now uses stub index.
-      <li>Compatibility: Restored compatibility with IDE versions < 2021.1.
-      <li>Performance: Optimized lexer.
-    </ul>
-  <h4>V0.2 (27-Jul-21)</h4>
-    <ul>
-      <li>Cosmetics: Added (same) icon for plugin as for file type.
-      <li>Performance: Use Word-Index for global labels and symbols instead of iterating over the file.
-      <li>Performance: Use Stub-Index for global labels and symbols.
-      <li>Bugfix: No longer reports a syntax error when file lacks terminating End-Of-Line.
-      <li>Enhancement: Registers are now offered for code completion, making editing less annoying. 
-    </ul>
   <p>Full changelog available at <a href="https://github.com/chrisly42/mc68000-asm-plugin#changelog">Github project site</a>.</p>
 """)
 }

src/main/java/de/platon42/intellij/plugins/m68k/asm/ConditionCode.kt

@@ -0,0 +1,198 @@
+package de.platon42.intellij.plugins.m68k.asm
+
+const val CC_X_CLEAR = 0x10000
+const val CC_X_SET = 0x20000
+const val CC_X_UNDEF = 0x30000
+const val CC_X_RES = 0x40000
+const val CC_X_AND = 0x50000
+const val CC_X_OR = 0x60000
+const val CC_X_CARRY = 0x70000
+const val CC_X_TST = 0xf0000
+
+const val CC_N_CLEAR = 0x01000
+const val CC_N_SET = 0x02000
+const val CC_N_UNDEF = 0x03000
+const val CC_N_RES = 0x04000
+const val CC_N_AND = 0x05000
+const val CC_N_OR = 0x06000
+const val CC_N_TST = 0x0f000
+
+const val CC_Z_CLEAR = 0x00100
+const val CC_Z_SET = 0x00200
+const val CC_Z_UNDEF = 0x00300
+const val CC_Z_RES = 0x00400
+const val CC_Z_AND = 0x00500
+const val CC_Z_OR = 0x00600
+const val CC_Z_TST = 0x00f00
+
+const val CC_V_CLEAR = 0x00010
+const val CC_V_SET = 0x00020
+const val CC_V_UNDEF = 0x00030
+const val CC_V_RES = 0x00040
+const val CC_V_AND = 0x00050
+const val CC_V_OR = 0x00060
+const val CC_V_TST = 0x000f0
+
+const val CC_C_CLEAR = 0x00001
+const val CC_C_SET = 0x00002
+const val CC_C_UNDEF = 0x00003
+const val CC_C_RES = 0x00004
+const val CC_C_AND = 0x00005
+const val CC_C_OR = 0x00006
+const val CC_C_TST = 0x0000f
+
+private const val CC_NOT_AFFECTED_STR = "Not affected"
+private const val CC_ALWAYS_CLEAR_STR = "Always cleared"
+private const val CC_ALWAYS_SET_STR = "Always set"
+private const val CC_UNDEFINED_STR = "Undefined"
+private const val CC_RES_STR = "From result"
+private const val CC_AND_STR = "And'ed: Only cleared for zero bit"
+private const val CC_OR_STR = "Or'ed: Only set for one bit"
+
+fun getCcInfo(cc: Int): Map<String, Pair<String, String>> {
+    val xnzvcMap = LinkedHashMap<String, Pair<String, String>>(5)
+    xnzvcMap["X"] = when (cc and CC_X_TST) {
+        0 -> "-" to CC_NOT_AFFECTED_STR
+        CC_X_SET -> "1" to CC_ALWAYS_SET_STR
+        CC_X_CLEAR -> "0" to CC_ALWAYS_CLEAR_STR
+        CC_X_UNDEF -> "U" to CC_UNDEFINED_STR
+        CC_X_AND -> "*" to CC_AND_STR
+        CC_X_OR -> "*" to CC_OR_STR
+        CC_X_CARRY -> "*" to "Set the same as the carry bit"
+        else -> "*" to "$CC_RES_STR (usually the bit shifted out)"
+    }
+    xnzvcMap["N"] = when (cc and CC_N_TST) {
+        0 -> "-" to CC_NOT_AFFECTED_STR
+        CC_N_SET -> "1" to CC_ALWAYS_SET_STR
+        CC_N_CLEAR -> "0" to CC_ALWAYS_CLEAR_STR
+        CC_N_UNDEF -> "U" to CC_UNDEFINED_STR
+        CC_N_AND -> "*" to CC_AND_STR
+        CC_N_OR -> "*" to CC_OR_STR
+        else -> "*" to "$CC_RES_STR (usually if negative)"
+    }
+    xnzvcMap["Z"] = when (cc and CC_Z_TST) {
+        0 -> "-" to CC_NOT_AFFECTED_STR
+        CC_Z_SET -> "1" to CC_ALWAYS_SET_STR
+        CC_Z_CLEAR -> "0" to CC_ALWAYS_CLEAR_STR
+        CC_Z_UNDEF -> "U" to CC_UNDEFINED_STR
+        CC_Z_AND -> "*" to CC_AND_STR
+        CC_Z_OR -> "*" to CC_OR_STR
+        else -> "*" to "$CC_RES_STR (usually if zero)"
+    }
+    xnzvcMap["V"] = when (cc and CC_V_TST) {
+        0 -> "-" to CC_NOT_AFFECTED_STR
+        CC_V_SET -> "1" to CC_ALWAYS_SET_STR
+        CC_V_CLEAR -> "0" to CC_ALWAYS_CLEAR_STR
+        CC_V_UNDEF -> "U" to CC_UNDEFINED_STR
+        CC_V_AND -> "*" to CC_AND_STR
+        CC_V_OR -> "*" to CC_OR_STR
+        else -> "*" to "$CC_RES_STR (usually for overflows)"
+    }
+    xnzvcMap["C"] = when (cc and CC_V_TST) {
+        0 -> "-" to CC_NOT_AFFECTED_STR
+        CC_V_SET -> "1" to CC_ALWAYS_SET_STR
+        CC_V_CLEAR -> "0" to CC_ALWAYS_CLEAR_STR
+        CC_V_UNDEF -> "U" to CC_UNDEFINED_STR
+        CC_V_AND -> "*" to CC_AND_STR
+        CC_V_OR -> "*" to CC_OR_STR
+        else -> "*" to "$CC_RES_STR (usually carry/borrow)"
+    }
+
+    return xnzvcMap
+}
+
+fun cc(xnzvc: String): Int {
+    var result = 0
+    result += when (xnzvc[0]) {
+        '-' -> 0
+        '0' -> CC_X_CLEAR
+        '1' -> CC_X_SET
+        'U' -> CC_X_UNDEF
+        '*' -> CC_X_RES
+        'A' -> CC_X_AND
+        'O' -> CC_X_OR
+        'C' -> CC_X_CARRY
+        '?' -> CC_X_TST
+        else -> throw IllegalArgumentException("Syntax Error")
+    }
+    result += when (xnzvc[1]) {
+        '-' -> 0
+        '0' -> CC_N_CLEAR
+        '1' -> CC_N_SET
+        'U' -> CC_N_UNDEF
+        '*' -> CC_N_RES
+        'A' -> CC_N_AND
+        'O' -> CC_N_OR
+        '?' -> CC_N_TST
+        else -> throw IllegalArgumentException("Syntax Error")
+    }
+    result += when (xnzvc[2]) {
+        '-' -> 0
+        '0' -> CC_Z_CLEAR
+        '1' -> CC_Z_SET
+        'U' -> CC_Z_UNDEF
+        '*' -> CC_Z_RES
+        'A' -> CC_Z_AND
+        'O' -> CC_Z_OR
+        '?' -> CC_Z_TST
+        else -> throw IllegalArgumentException("Syntax Error")
+    }
+    result += when (xnzvc[3]) {
+        '-' -> 0
+        '0' -> CC_V_CLEAR
+        '1' -> CC_V_SET
+        'U' -> CC_V_UNDEF
+        '*' -> CC_V_RES
+        'A' -> CC_V_AND
+        'O' -> CC_V_OR
+        '?' -> CC_V_TST
+        else -> throw IllegalArgumentException("Syntax Error")
+    }
+    result += when (xnzvc[4]) {
+        '-' -> 0
+        '0' -> CC_C_CLEAR
+        '1' -> CC_C_SET
+        'U' -> CC_C_UNDEF
+        '*' -> CC_C_RES
+        'A' -> CC_C_AND
+        'O' -> CC_C_OR
+        '?' -> CC_C_TST
+        else -> throw IllegalArgumentException("Syntax Error")
+    }
+    return result
+}
+
+enum class ConditionCode(val cc: String, val testedCc: Int) {
+    TRUE("t", cc("-----")),
+    FALSE("f", cc("-----")),
+    HI("hi", cc("--?-?")),
+    LS("ls", cc("--?-?")),
+    CC("cc", cc("----?")),
+    HS("hs", cc("----?")), // same as CC
+    CS("cs", cc("----?")),
+    LO("lo", cc("----?")), // same as CS
+    NE("ne", cc("--?--")),
+    EQ("eq", cc("--?--")),
+    VC("vc", cc("---?-")),
+    VS("vs", cc("---?-")),
+    PL("pl", cc("-?---")),
+    MI("mi", cc("-?---")),
+    GE("ge", cc("-?-?-")),
+    LT("lt", cc("-?-?-")),
+    GT("gt", cc("-???-")),
+    LE("le", cc("-???-"));
+
+    companion object {
+        private val NAME_TO_CC_MAP = values().associateBy { it.cc }
+
+        fun getCcFromName(cc: String) = NAME_TO_CC_MAP[cc.lowercase()]!!
+
+        fun getCcFromMnemonic(originalMnemonic: String, mnemonic: String) =
+            // handle special case for dbra
+            if (mnemonic.equals("dbra", ignoreCase = true)) {
+                FALSE
+            } else {
+                NAME_TO_CC_MAP[mnemonic.removePrefix(originalMnemonic.removeSuffix("CC")).lowercase()]!!
+            }
+    }
+}

src/main/java/de/platon42/intellij/plugins/m68k/asm/M68kIsa.kt

@@ -72,11 +72,13 @@ const val RWM_READ_OPSIZE = 0x800
 const val RWM_READ_B = 0x900
 const val RWM_READ_W = 0xb00
 const val RWM_READ_L = 0xf00
+const val RWM_READ_SHIFT = 8
 
-const val RWM_MODIFY_OPSIZE = 0x880
-const val RWM_MODIFY_B = 0x990
-const val RWM_MODIFY_W = 0xbb0
-const val RWM_MODIFY_L = 0xff0
+const val RWM_MODIFY_OPSIZE = 0x080
+const val RWM_MODIFY_B = 0x090
+const val RWM_MODIFY_W = 0x0b0
+const val RWM_MODIFY_L = 0x0f0
+const val RWM_MODIFY_SHIFT = 4
 
 const val RWM_OP1_SHIFT = 0
 const val RWM_OP2_SHIFT = 12
@@ -118,7 +120,9 @@ data class AllowedAdrMode(
     val op2: Set<AddressMode>? = null,
     val size: Int = OP_SIZE_BWL,
     val specialReg: String? = null,
-    val modInfo: Int = 0
+    val modInfo: Int = 0,
+    val affectedCc: Int = 0,
+    val testedCc: Int = 0
 )
 
 data class IsaData(
@@ -131,6 +135,7 @@ data class IsaData(
     val isPrivileged: Boolean = false,
     val hasOps: Boolean = true,
     val modes: List<AllowedAdrMode> = listOf(AllowedAdrMode()),
+    val changesControlFlow: Boolean = false
 )
 
 object M68kIsa {
@@ -210,38 +215,78 @@ object M68kIsa {
     private val DREG_ONLY = setOf(AddressMode.DATA_REGISTER_DIRECT)
 
     private val ADD_SUB_MODES = listOf(
-        AllowedAdrMode(ALL_EXCEPT_AREG, setOf(AddressMode.DATA_REGISTER_DIRECT), modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
+        AllowedAdrMode(
+            ALL_EXCEPT_AREG,
+            setOf(AddressMode.DATA_REGISTER_DIRECT),
+            modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+            affectedCc = cc("C****")
+        ),
         AllowedAdrMode(
             setOf(AddressMode.ADDRESS_REGISTER_DIRECT),
             setOf(AddressMode.DATA_REGISTER_DIRECT),
             OP_SIZE_WL,
-            modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE
+            modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+            affectedCc = cc("C****")
+        ),
+        AllowedAdrMode(
+            setOf(AddressMode.DATA_REGISTER_DIRECT),
+            INDIRECT_MODES,
+            modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+            affectedCc = cc("C****")
         ),
-        AllowedAdrMode(setOf(AddressMode.DATA_REGISTER_DIRECT), INDIRECT_MODES, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
     )
 
-    private val ASD_LSD_ROD_ROXD_MODES = listOf(
-        AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
-        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, modInfo = RWM_MODIFY_OP2_OPSIZE),
-        AllowedAdrMode(INDIRECT_MODES, null, modInfo = RWM_MODIFY_OP1_OPSIZE),
+    private val ADDQ_SUBQ_MODES = listOf(
+        AllowedAdrMode(
+            setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("C****")
+        ),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), AREG_ONLY, size = OP_SIZE_WL, modInfo = RWM_MODIFY_OP2_L, affectedCc = cc("C****"))
+    )
+
+    private val ADDX_SUBX_MODES = listOf(
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("C*A**"), testedCc = cc("?-?--")),
+        AllowedAdrMode(
+            setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
+            setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
+            modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+            affectedCc = cc("C*A**"), testedCc = cc("?-?--")
+        )
+    )
+
+    private val ASD_LSD_MODES = listOf(
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("*****")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("*****")),
+        AllowedAdrMode(INDIRECT_MODES, null, modInfo = RWM_MODIFY_OP1_OPSIZE, affectedCc = cc("*****")),
+    )
+
+    private val ROD_MODES = listOf(
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**0*")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**0*")),
+        AllowedAdrMode(INDIRECT_MODES, null, modInfo = RWM_MODIFY_OP1_OPSIZE, affectedCc = cc("-**0*")),
+    )
+
+    private val ROXD_MODES = listOf(
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("***0*"), testedCc = cc("?----")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("***0*"), testedCc = cc("?----")),
+        AllowedAdrMode(INDIRECT_MODES, null, modInfo = RWM_MODIFY_OP1_OPSIZE, affectedCc = cc("***0*"), testedCc = cc("?----")),
     )
 
     private val BCHG_BCLR_BSET_MODES = listOf(
-        AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP1_B or RWM_MODIFY_OP2_L),
-        AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP1_B or RWM_MODIFY_OP2_B),
-        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_MODIFY_OP2_L),
-        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_MODIFY_OP2_B),
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP1_B or RWM_MODIFY_OP2_L, affectedCc = cc("--*--")),
+        AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP1_B or RWM_MODIFY_OP2_B, affectedCc = cc("--*--")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_MODIFY_OP2_L, affectedCc = cc("--*--")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_MODIFY_OP2_B, affectedCc = cc("--*--")),
     )
 
     private val BTST_MODES = listOf(
-        AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP1_B or RWM_READ_OP2_L),
-        AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP1_B or RWM_READ_OP2_B),
-        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP2_L),
-        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP2_B),
+        AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP1_B or RWM_READ_OP2_L, affectedCc = cc("--*--")),
+        AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP1_B or RWM_READ_OP2_B, affectedCc = cc("--*--")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_READ_OP2_L, affectedCc = cc("--*--")),
+        AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), INDIRECT_MODES, OP_SIZE_B, modInfo = RWM_READ_OP2_B, affectedCc = cc("--*--")),
     )
 
     private val conditionCodes =
-        listOf("cc", "ls", "cs", "lt", "eq", "mi", "f", "ne", "ge", "pl", "gt", "t", "hi", "vc", "le", "vs")
+        listOf("cc", "hs", "ls", "cs", "lo", "lt", "eq", "mi", "f", "ne", "ge", "pl", "gt", "t", "hi", "vc", "le", "vs")
 
     private val conditionCodesBcc = conditionCodes.filterNot { it == "f" || it == "t" }
 
@@ -250,7 +295,12 @@ object M68kIsa {
         // Data Movement Instructions
         IsaData(
             "move", "Move",
-            modes = listOf(AllowedAdrMode(ALL_68000_MODES, ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_READ_OP1_OPSIZE or RWM_SET_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    ALL_68000_MODES, ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_READ_OP1_OPSIZE or RWM_SET_OP2_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
         ),
         IsaData(
             "movea", "Move Address", altMnemonics = listOf("move"),
@@ -283,7 +333,7 @@ object M68kIsa {
                     ),
                     setOf(AddressMode.REGISTER_LIST, AddressMode.ADDRESS_REGISTER_DIRECT, AddressMode.DATA_REGISTER_DIRECT),
                     OP_SIZE_WL,
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_SET_OP2_OPSIZE
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_SET_OP2_L
                 ),
                 // according to Yann, specifying the registers as bitmask is also valid
                 AllowedAdrMode(
@@ -332,7 +382,7 @@ object M68kIsa {
 
         IsaData(
             "moveq", "Move Quick",
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_SET_OP2_L))
+            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), DREG_ONLY, OP_SIZE_L, modInfo = RWM_SET_OP2_L, affectedCc = cc("-**00")))
         ),
 
         IsaData(
@@ -342,7 +392,7 @@ object M68kIsa {
                     setOf(AddressMode.DATA_REGISTER_DIRECT, AddressMode.ADDRESS_REGISTER_DIRECT),
                     setOf(AddressMode.DATA_REGISTER_DIRECT, AddressMode.ADDRESS_REGISTER_DIRECT),
                     OP_SIZE_L,
-                    modInfo = RWM_SET_OP1_L or RWM_SET_OP2_L
+                    modInfo = RWM_MODIFY_OP1_L or RWM_MODIFY_OP2_L // exchanging registers does not set value to a defined state
                 )
             )
         ),
@@ -395,31 +445,18 @@ object M68kIsa {
         IsaData("add", "Add", modes = ADD_SUB_MODES),
         IsaData(
             "adda", "Add Address", altMnemonics = listOf("add"),
-            modes = listOf(
-                AllowedAdrMode(ALL_68000_MODES, AREG_ONLY, OP_SIZE_WL, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_L),
-            )
+            modes = listOf(AllowedAdrMode(ALL_68000_MODES, AREG_ONLY, OP_SIZE_WL, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_L))
         ),
         IsaData(
             "addi", "Add Immediate", altMnemonics = listOf("add"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE))
-        ),
-        IsaData(
-            "addq", "Add Quick", modes = listOf(
-                AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE),
-                AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), AREG_ONLY, size = OP_SIZE_WL, modInfo = RWM_MODIFY_OP2_L)
-            )
-        ),
-        IsaData(
-            "addx", "Add with Extend",
             modes = listOf(
-                AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
                 AllowedAdrMode(
-                    setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
-                    setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE
+                    setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("C****")
                 )
             )
         ),
+        IsaData("addq", "Add Quick", modes = ADDQ_SUBQ_MODES),
+        IsaData("addx", "Add with Extend", modes = ADDX_SUBX_MODES),
 
         IsaData("sub", "Subtract", modes = ADD_SUB_MODES),
         IsaData(
@@ -428,49 +465,67 @@ object M68kIsa {
         ),
         IsaData(
             "subi", "Subtract Immediate", altMnemonics = listOf("sub"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("C****")
+                )
+            )
         ),
+        IsaData("subq", "Subtract Quick", modes = ADDQ_SUBQ_MODES),
+        IsaData("subx", "Subtract with Extend", modes = ADDX_SUBX_MODES),
+
         IsaData(
-            "subq", "Subtract Quick", modes = listOf(
-                AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE),
-                AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), AREG_ONLY, size = OP_SIZE_WL, modInfo = RWM_MODIFY_OP2_L)
+            "neg", "Negate", modes = listOf(
+                AllowedAdrMode(
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE,
+                    affectedCc = cc("C****")
+                )
             )
         ),
         IsaData(
-            "subx", "Subtract with Extend",
-            modes = listOf(
-                AllowedAdrMode(DREG_ONLY, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
+            "negx", "Negate with Extend", modes = listOf(
                 AllowedAdrMode(
-                    setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
-                    setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE,
+                    affectedCc = cc("C****"), testedCc = cc("?----")
                 )
             )
         ),
 
-        IsaData("neg", "Negate", modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE))),
-        IsaData("negx", "Negate with Extend", modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE))),
-
-        IsaData("clr", "Clear", modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_SET_OP1_OPSIZE))),
+        IsaData(
+            "clr",
+            "Clear",
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_SET_OP1_OPSIZE, affectedCc = cc("-0100")))
+        ),
 
         IsaData(
             "cmp", "Compare", modes = listOf(
-                AllowedAdrMode(ALL_EXCEPT_AREG, setOf(AddressMode.DATA_REGISTER_DIRECT), modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE),
+                AllowedAdrMode(
+                    ALL_EXCEPT_AREG,
+                    setOf(AddressMode.DATA_REGISTER_DIRECT),
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE,
+                    affectedCc = cc("-****")
+                ),
                 AllowedAdrMode(
                     setOf(AddressMode.ADDRESS_REGISTER_DIRECT),
                     setOf(AddressMode.DATA_REGISTER_DIRECT),
                     OP_SIZE_WL,
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE,
+                    affectedCc = cc("-****")
                 ),
             )
         ),
         IsaData(
             "cmpa", "Compare Address", altMnemonics = listOf("cmp"),
-            modes = listOf(AllowedAdrMode(ALL_68000_MODES, AREG_ONLY, OP_SIZE_WL, modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_L))
+            modes = listOf(AllowedAdrMode(ALL_68000_MODES, AREG_ONLY, OP_SIZE_WL, modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_L, affectedCc = cc("-****")))
         ),
         IsaData(
             "cmpi", "Compare Immediate", altMnemonics = listOf("cmp"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_AND_IMMEDIATE, modInfo = RWM_READ_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_AND_IMMEDIATE, modInfo = RWM_READ_OP2_OPSIZE,
+                    affectedCc = cc("-****")
+                )
+            )
         ),
         IsaData(
             "cmpm", "Compare Memory to Memory", altMnemonics = listOf("cmp"),
@@ -478,76 +533,110 @@ object M68kIsa {
                 AllowedAdrMode(
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_POST_INC),
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_POST_INC),
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_READ_OP2_OPSIZE,
+                    affectedCc = cc("-****")
                 )
             )
         ),
 
         IsaData(
             "muls", "Signed Multiply",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_MODIFY_OP2_L))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_MODIFY_OP2_L, affectedCc = cc("-**00")))
         ),
         IsaData(
             "mulu", "Unsigned Multiply",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_MODIFY_OP2_L))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_MODIFY_OP2_L, affectedCc = cc("-**00")))
         ),
         IsaData(
             "divs", "Signed Divide",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_L or RWM_MODIFY_OP2_L))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_L or RWM_MODIFY_OP2_L, affectedCc = cc("-***0")))
         ),
         IsaData(
             "divu", "Unsigned Divide",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_L or RWM_MODIFY_OP2_L))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_L or RWM_MODIFY_OP2_L, affectedCc = cc("-***0")))
         ),
 
-        IsaData("ext", "Sign Extend", modes = listOf(AllowedAdrMode(DREG_ONLY, null, OP_SIZE_WL, modInfo = RWM_MODIFY_OP1_OPSIZE))),
+        IsaData("ext", "Sign Extend", modes = listOf(AllowedAdrMode(DREG_ONLY, null, OP_SIZE_WL, modInfo = RWM_MODIFY_OP1_OPSIZE, affectedCc = cc("-**00")))),
 
         // Logical Instructions
         IsaData(
             "and", "Logical AND",
             modes = listOf(
-                AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
-                AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE)
+                AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**00")),
+                AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**00"))
             )
         ),
         IsaData(
-            "andi", "Logical AND Immediate", altMnemonics = listOf("and"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE))
+            "andi", "Logical AND Immediate",
+            altMnemonics = listOf("and"),
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA),
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL,
+                    modInfo = RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
         ),
         IsaData(
             "eor", "Logical Exclusive-OR",
-            modes = listOf(AllowedAdrMode(DREG_ONLY, ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    DREG_ONLY,
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL,
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
         ),
         IsaData(
             "eori", "Logical Exclusive-OR Immediate", altMnemonics = listOf("eor"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA),
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL,
+                    modInfo = RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
         ),
         IsaData(
             "or", "Logical Inclusive-OR",
             modes = listOf(
-                AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
-                AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE)
+                AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**00")),
+                AllowedAdrMode(DREG_ONLY, INDIRECT_MODES, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE, affectedCc = cc("-**00"))
             )
         ),
         IsaData(
             "ori", "Logical Inclusive-OR Immediate", altMnemonics = listOf("or"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, modInfo = RWM_MODIFY_OP2_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA),
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL,
+                    modInfo = RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
         ),
         IsaData(
             "not", "Logical Complement",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_MODIFY_OP1_OPSIZE, affectedCc = cc("-**00")))
         ),
 
         // Shift and Rotate Instructions
-        IsaData("asl", "Arithmetic Shift Left", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("asr", "Arithmetic Shift Right", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("lsl", "Logical Shift Left", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("lsr", "Logical Shift Right", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("rol", "Rotate Left", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("ror", "Rotate Right", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("roxl", "Rotate with Extend Left", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("roxr", "Rotate with Extend Right", modes = ASD_LSD_ROD_ROXD_MODES),
-        IsaData("swap", "Swap Register Words", modes = listOf(AllowedAdrMode(DREG_ONLY, null, OP_SIZE_W, modInfo = RWM_MODIFY_OP1_L))),
+        IsaData("asl", "Arithmetic Shift Left", modes = ASD_LSD_MODES),
+        IsaData("asr", "Arithmetic Shift Right", modes = ASD_LSD_MODES),
+        IsaData("lsl", "Logical Shift Left", modes = ASD_LSD_MODES),
+        IsaData("lsr", "Logical Shift Right", modes = ASD_LSD_MODES),
+        IsaData("rol", "Rotate Left", modes = ROD_MODES),
+        IsaData("ror", "Rotate Right", modes = ROD_MODES),
+        IsaData("roxl", "Rotate with Extend Left", modes = ROXD_MODES),
+        IsaData("roxr", "Rotate with Extend Right", modes = ROXD_MODES),
+        IsaData(
+            "swap",
+            "Swap Register Words",
+            modes = listOf(AllowedAdrMode(DREG_ONLY, null, OP_SIZE_W, modInfo = RWM_MODIFY_OP1_L, affectedCc = cc("-**00")))
+        ),
 
         // Bit Manipulation Instructions
         IsaData("bchg", "Test Bit and Change", modes = BCHG_BCLR_BSET_MODES),
@@ -559,42 +648,61 @@ object M68kIsa {
         IsaData(
             "abcd", "Add Decimal with Extend",
             modes = listOf(
-                AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_B, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
+                AllowedAdrMode(
+                    DREG_ONLY, DREG_ONLY, OP_SIZE_B, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("CUAU*"), testedCc = cc("?-?--")
+                ),
                 AllowedAdrMode(
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
                     OP_SIZE_B,
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("CUAU*"), testedCc = cc("?-?--")
                 )
             )
         ),
         IsaData(
             "sbcd", "Subtract Decimal with Extend",
             modes = listOf(
-                AllowedAdrMode(DREG_ONLY, DREG_ONLY, OP_SIZE_B, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE),
+                AllowedAdrMode(
+                    DREG_ONLY, DREG_ONLY, OP_SIZE_B, modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("CUAU*"), testedCc = cc("?-?--")
+                ),
                 AllowedAdrMode(
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
                     setOf(AddressMode.ADDRESS_REGISTER_INDIRECT_PRE_DEC),
                     OP_SIZE_B,
-                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE
+                    modInfo = RWM_READ_OP1_OPSIZE or RWM_MODIFY_OP2_OPSIZE,
+                    affectedCc = cc("CUAU*"), testedCc = cc("?-?--")
                 )
             )
         ),
         IsaData(
             "nbcd", "Negate Decimal with Extend",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_MODIFY_OP1_OPSIZE))
+            modes = listOf(
+                AllowedAdrMode(
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_MODIFY_OP1_OPSIZE,
+                    affectedCc = cc("CUAU*"), testedCc = cc("?-?--")
+                )
+            )
         ),
 
         // Program Control Instructions
         IsaData(
             "bCC", "Branch Conditionally", conditionCodes = conditionCodesBcc,
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW))
+            modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW, testedCc = cc("-????"))),
+            changesControlFlow = true
+        ),
+        IsaData(
+            "bra", "Branch",
+            modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW)),
+            changesControlFlow = true
         ),
-        IsaData("bra", "Branch", modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW))),
         IsaData(
             "bsr",
             "Branch to Subroutine",
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW, modInfo = RWM_MODIFY_STACK))
+            modes = listOf(AllowedAdrMode(setOf(AddressMode.ABSOLUTE_ADDRESS), null, OP_SIZE_SBW, modInfo = RWM_MODIFY_STACK)),
+            changesControlFlow = true
         ),
 
         IsaData(
@@ -602,11 +710,12 @@ object M68kIsa {
             "Test Condition, Decrement, and Branch",
             altMnemonics = listOf("dbra"),
             conditionCodes = conditionCodes,
-            modes = listOf(AllowedAdrMode(DREG_ONLY, setOf(AddressMode.ABSOLUTE_ADDRESS), OP_SIZE_W, modInfo = RWM_MODIFY_OP1_W))
+            modes = listOf(AllowedAdrMode(DREG_ONLY, setOf(AddressMode.ABSOLUTE_ADDRESS), OP_SIZE_W, modInfo = RWM_MODIFY_OP1_W, testedCc = cc("-????"))),
+            changesControlFlow = true
         ),
         IsaData(
             "sCC", "Set Conditionally", conditionCodes = conditionCodes,
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_SET_OP2_B))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_SET_OP2_B, testedCc = cc("-????")))
         ),
 
         IsaData(
@@ -622,7 +731,8 @@ object M68kIsa {
                         AddressMode.PROGRAM_COUNTER_INDIRECT_WITH_INDEX
                     ), null, OP_UNSIZED
                 )
-            )
+            ),
+            changesControlFlow = true
         ),
         IsaData(
             "jsr", "Jump to Subroutine",
@@ -637,27 +747,60 @@ object M68kIsa {
                         AddressMode.PROGRAM_COUNTER_INDIRECT_WITH_INDEX
                     ), null, OP_UNSIZED, modInfo = RWM_MODIFY_STACK
                 )
-            )
+            ),
+            changesControlFlow = true
         ),
         IsaData("nop", "No Operation", hasOps = false, modes = NO_OPS_UNSIZED),
 
-        IsaData("rtr", "Return and Restore", hasOps = false, modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK))),
-        IsaData("rts", "Return from Subroutine", hasOps = false, modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK))),
+        IsaData(
+            "rtr",
+            "Return and Restore",
+            hasOps = false,
+            modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK, affectedCc = cc("*****"))),
+            changesControlFlow = true
+        ),
+        IsaData(
+            "rts", "Return from Subroutine", hasOps = false,
+            modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK)),
+            changesControlFlow = true
+        ),
 
-        IsaData("tst", "Test Operand", modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_READ_OP1_OPSIZE))),
+        IsaData(
+            "tst", "Test Operand", modes = listOf(
+                AllowedAdrMode(
+                    ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL, null, modInfo = RWM_READ_OP1_OPSIZE,
+                    affectedCc = cc("-**00")
+                )
+            )
+        ),
 
         // System Control Instructions
         IsaData(
             "andi", "AND Immediate to Status Register", id = "andi to SR", altMnemonics = listOf("and"), isPrivileged = true,
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr",
+                    affectedCc = cc("AAAAA"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "eori", "Exclusive-OR Immediate to Status Register", id = "eori to SR", altMnemonics = listOf("eor"), isPrivileged = true,
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr",
+                    affectedCc = cc("*****"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "ori", "Inclusive-OR Immediate to Status Register", id = "ori to SR", altMnemonics = listOf("or"), isPrivileged = true,
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr",
+                    affectedCc = cc("OOOOO"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "move", "Move from Status Register", id = "move from SR",
@@ -667,13 +810,19 @@ object M68kIsa {
                     ALL_EXCEPT_AREG_IMMEDIATE_AND_PC_REL,
                     OP_SIZE_W,
                     "sr",
-                    modInfo = RWM_SET_OP2_W
+                    modInfo = RWM_SET_OP2_W,
+                    testedCc = cc("?????")
                 )
             )
         ),
         IsaData(
             "move", "Move to Status Register", id = "move to SR", isPrivileged = true,
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    ALL_EXCEPT_AREG, setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "sr",
+                    affectedCc = cc("*****")
+                )
+            )
         ),
         IsaData(
             "move", "Move User Stack Pointer", id = "move USP", isPrivileged = true,
@@ -686,7 +835,8 @@ object M68kIsa {
         IsaData("reset", "Reset External Devices", isPrivileged = true, hasOps = false, modes = NO_OPS_UNSIZED),
         IsaData(
             "rte", "Return from Exception", isPrivileged = true, hasOps = false,
-            modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK))
+            modes = listOf(AllowedAdrMode(size = OP_UNSIZED, modInfo = RWM_MODIFY_STACK)),
+            changesControlFlow = true
         ),
         IsaData(
             "stop", "Stop", isPrivileged = true,
@@ -695,59 +845,70 @@ object M68kIsa {
 
         IsaData(
             "chk", "Check Register Against Bound",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_READ_OP2_W))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, DREG_ONLY, OP_SIZE_W, modInfo = RWM_READ_OP1_W or RWM_READ_OP2_W, affectedCc = cc("-*UUU")))
+        ),
+        IsaData("illegal", "Take Illegal Instruction Trap", hasOps = false, modes = NO_OPS_UNSIZED, changesControlFlow = true),
+        IsaData("trap", "Trap", modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), null, OP_UNSIZED)), changesControlFlow = true),
+        IsaData(
+            "trapv", "Trap on Overflow", hasOps = false,
+            modes = listOf(AllowedAdrMode(size = OP_UNSIZED, testedCc = cc("---?-"))),
+            changesControlFlow = true
         ),
-        IsaData("illegal", "Take Illegal Instruction Trap", hasOps = false, modes = NO_OPS_UNSIZED),
-        IsaData("trap", "Trap", modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), null, OP_UNSIZED))),
-        IsaData("trapv", "Trap on Overflow", hasOps = false, modes = NO_OPS_UNSIZED),
 
         IsaData(
             "andi", "AND Immediate to Condition Code Register", id = "andi to CCR", altMnemonics = listOf("and"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "ccr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_B, "ccr",
+                    affectedCc = cc("AAAAA"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "eori", "Exclusive-OR Immediate to Condition Code Register", id = "eori to CCR", altMnemonics = listOf("eor"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "ccr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_B, "ccr",
+                    affectedCc = cc("*****"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "ori", "Inclusive-OR Immediate to Condition Code Register", id = "ori to CCR", altMnemonics = listOf("or"),
-            modes = listOf(AllowedAdrMode(setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "ccr"))
+            modes = listOf(
+                AllowedAdrMode(
+                    setOf(AddressMode.IMMEDIATE_DATA), setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_B, "ccr",
+                    affectedCc = cc("OOOOO"), testedCc = cc("?????")
+                )
+            )
         ),
         IsaData(
             "move", "Move to Condition Code Register", id = "move to CCR",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_AREG, setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "ccr"))
+            modes = listOf(
+                AllowedAdrMode(ALL_EXCEPT_AREG, setOf(AddressMode.SPECIAL_REGISTER_DIRECT), OP_SIZE_W, "ccr", affectedCc = cc("*****")),
+            )
         ),
 
         // Multiprocessor Instructions
         IsaData(
             "tas", "Test Operand and Set",
-            modes = listOf(AllowedAdrMode(ALL_EXCEPT_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_MODIFY_OP1_B))
+            modes = listOf(AllowedAdrMode(ALL_EXCEPT_IMMEDIATE_AND_PC_REL, null, OP_SIZE_B, modInfo = RWM_MODIFY_OP1_B, affectedCc = cc("-**00")))
         )
     )
 
-    val mnemonics =
-        isaData.asSequence()
-            .flatMap {
-                if (it.conditionCodes.isEmpty()) it.altMnemonics.plus(it.mnemonic) else it.altMnemonics.plus(it.conditionCodes
-                    .map { cc ->
-                        it.mnemonic.replace("CC", cc)
-                    })
-            }
-            .toSet()
+    private val mnemonicLookupMap = isaData.asSequence()
+        .flatMap {
+            (if (it.conditionCodes.isEmpty()) it.altMnemonics.plus(it.mnemonic) else it.altMnemonics.plus(it.conditionCodes
+                .map { cc ->
+                    it.mnemonic.replace("CC", cc)
+                })).map { mnemonic -> mnemonic to it }
+        }
+        .groupBy({ it.first }) { it.second }
+
+    val mnemonics = mnemonicLookupMap.keys
 
     fun findMatchingInstructions(mnemonic: String): List<IsaData> {
-        val lowerMnemonic = mnemonic.lowercase()
-        return isaData
-            .filter {
-                if (it.conditionCodes.isEmpty()) {
-                    (it.mnemonic == lowerMnemonic) || it.altMnemonics.any { altMnemonic -> altMnemonic == lowerMnemonic }
-                } else {
-                    it.altMnemonics.any { altMnemonic -> altMnemonic == lowerMnemonic } ||
-                            it.conditionCodes.any { cc ->
-                                it.mnemonic.replace("CC", cc) == lowerMnemonic
-                            }
-                }
-            }
+        return mnemonicLookupMap.getOrDefault(mnemonic.lowercase(), emptyList())
     }
 
     fun findMatchingOpMode(candidates: List<IsaData>, op1: AddressMode?, op2: AddressMode?, opSize: Int?, specialReg: String?): List<IsaData> {

src/main/java/de/platon42/intellij/plugins/m68k/documentation/M68kInstructionDocumentationProvider.kt

@@ -10,6 +10,7 @@ import com.intellij.psi.PsiFile
 import de.platon42.intellij.plugins.m68k.asm.AddressMode
 import de.platon42.intellij.plugins.m68k.asm.IsaData
 import de.platon42.intellij.plugins.m68k.asm.M68kIsa
+import de.platon42.intellij.plugins.m68k.asm.getCcInfo
 import de.platon42.intellij.plugins.m68k.psi.M68kAsmInstruction
 import de.platon42.intellij.plugins.m68k.psi.M68kAsmOp
 import de.platon42.intellij.plugins.m68k.psi.M68kOperandSize
@@ -36,24 +37,67 @@ class M68kInstructionDocumentationProvider : AbstractDocumentationProvider() {
         val defBuilder = createDefinition(isaData)
         builder.append(defBuilder.wrapWith(DocumentationMarkup.DEFINITION_ELEMENT))
 
+        val hasSameCcsForEverything = isaData.modes.map { it.affectedCc }.distinct().count() == 1
+        var alreadyShownCcsOnce = false
         val mnemonicInfoRows = HtmlBuilder()
-        val headerCells = listOf(
-            HtmlChunk.text("Mnemonic").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL),
-            HtmlChunk.text("Op1").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL),
-            HtmlChunk.text("Op2").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL)
-        )
-        mnemonicInfoRows.append(HtmlChunk.tag("tr").children(headerCells))
-        isaData.modes.forEach { allowedAdrMode ->
-            val mnemonics = findOpSizeDescriptions(allowedAdrMode.size)
-                .map { HtmlChunk.text(isaData.mnemonic + it).wrapWith(HtmlChunk.div()) }
-            mnemonicInfoRows.append(
-                HtmlChunk.tag("tr").children(
-                    DocumentationMarkup.SECTION_CONTENT_CELL.children(mnemonics),
-                    DocumentationMarkup.SECTION_CONTENT_CELL.child(collectAddressModes(allowedAdrMode.op1)),
-                    DocumentationMarkup.SECTION_CONTENT_CELL.child(collectAddressModes(allowedAdrMode.op2))
-                )
-            )
-        }
+        mnemonicInfoRows.appendWithSeparators(HtmlChunk.tag("tr").child(HtmlChunk.hr().wrapWith(DocumentationMarkup.SECTION_CONTENT_CELL).attr("colspan", "3")),
+            isaData.modes.map { allowedAdrMode ->
+                val addressModeInfoRows = HtmlBuilder()
+                val headerCells = if (allowedAdrMode.op2 != null) {
+                    listOf(
+                        HtmlChunk.text("Mnemonic / CCs").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL),
+                        HtmlChunk.text("Operand 1").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL),
+                        HtmlChunk.text("Operand 2").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL)
+                    )
+                } else if (allowedAdrMode.op1 != null) {
+                    listOf(
+                        HtmlChunk.text("Mnemonic / CCs").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL),
+                        HtmlChunk.text("Operand").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL)
+                    )
+                } else {
+                    listOf(HtmlChunk.text("Mnemonic / CCs").wrapWith(DocumentationMarkup.SECTION_HEADER_CELL))
+                }
+                addressModeInfoRows.append(HtmlChunk.tag("tr").children(headerCells))
+
+                val contentBuilder = HtmlBuilder()
+                val mnemonics = findOpSizeDescriptions(allowedAdrMode.size)
+                    .map { HtmlChunk.text(isaData.mnemonic + it) }
+                contentBuilder.appendWithSeparators(HtmlChunk.br(), mnemonics)
+                contentBuilder.append(HtmlChunk.hr())
+                if (alreadyShownCcsOnce && hasSameCcsForEverything) {
+                    contentBuilder.append(HtmlChunk.text("Condition Codes: Same as above"))
+                } else {
+                    alreadyShownCcsOnce = true
+                    contentBuilder.append(HtmlChunk.text("Condition Codes: "))
+                    contentBuilder.append(HtmlChunk.br())
+                    if (allowedAdrMode.affectedCc == 0) {
+                        contentBuilder.append(HtmlChunk.text("Not affected."))
+                    } else {
+                        val ccMap = getCcInfo(allowedAdrMode.affectedCc)
+                        val ccShortTableRows = HtmlBuilder()
+                        ccShortTableRows.append(
+                            HtmlChunk.tag("tr").children(ccMap.keys.map { HtmlChunk.text(it).wrapWith(DocumentationMarkup.SECTION_HEADER_CELL) })
+                        )
+                        ccShortTableRows.append(
+                            HtmlChunk.tag("tr").children(ccMap.values.map {
+                                HtmlChunk.text(it.first).wrapWith(DocumentationMarkup.SECTION_CONTENT_CELL)
+                            })
+                        )
+                        contentBuilder.append(ccShortTableRows.wrapWith(DocumentationMarkup.SECTIONS_TABLE))
+                        contentBuilder.appendWithSeparators(HtmlChunk.br(), ccMap.map {
+                            HtmlChunk.text(it.key + " - " + it.value.second)
+                        })
+                    }
+                }
+                val cellsPerRow = ArrayList<HtmlChunk>(3)
+                cellsPerRow.add(contentBuilder.toFragment())
+
+                if (allowedAdrMode.op1 != null) cellsPerRow.add(collectAddressModes(allowedAdrMode.op1))
+                if (allowedAdrMode.op1 != null) cellsPerRow.add(collectAddressModes(allowedAdrMode.op2))
+
+                addressModeInfoRows.append(HtmlChunk.tag("tr").children(cellsPerRow.map { it.wrapWith(DocumentationMarkup.SECTION_CONTENT_CELL) }))
+                addressModeInfoRows.toFragment()
+            })
 
         val contentBuilder = HtmlBuilder()
         contentBuilder.append(mnemonicInfoRows.wrapWith(DocumentationMarkup.SECTIONS_TABLE))

src/main/java/de/platon42/intellij/plugins/m68k/documentation/M68kRegisterFlowDocumentationProvider.kt

@@ -13,8 +13,8 @@ import com.intellij.ui.JBColor
 import de.platon42.intellij.plugins.m68k.asm.*
 import de.platon42.intellij.plugins.m68k.asm.Register.Companion.getRegFromName
 import de.platon42.intellij.plugins.m68k.psi.*
-import de.platon42.intellij.plugins.m68k.psi.M68kAddressModeUtil.getOtherReadWriteModifyRegisters
-import de.platon42.intellij.plugins.m68k.psi.M68kAddressModeUtil.getReadWriteModifyRegisters
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.checkIfInstructionUsesRegister
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.evaluateRegisterUse
 import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.findExactIsaDataAndAllowedAdrModeForInstruction
 import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.getOpSizeOrDefault
 import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.modifyRwmWithOpsize
@@ -52,7 +52,7 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
 
         val firstOp = asmInstruction.addressingModeList[0] == addressingMode
         val cursorRwm = modifyRwmWithOpsize((adrMode.modInfo ushr if (firstOp) RWM_OP1_SHIFT else RWM_OP2_SHIFT) and RWM_OP_MASK, opSize)
-        val backtrace: MutableList<HtmlChunk> = ArrayList()
+        val backtrace = ArrayList<HtmlChunk>()
         val missingBits = if (cursorRwm and RWM_SET_L != 0) {
             if (totalRwm and RWM_SET_L == RWM_SET_L) {
                 backtrace.add(
@@ -64,10 +64,10 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
                 )
                 0
             } else {
-                (RWM_SET_L and RWM_SIZE_MASK) and totalRwm.inv()
+                RWM_SIZE_MASK and totalRwm.inv()
             }
         } else {
-            (RWM_SET_L and RWM_SIZE_MASK) and ((cursorRwm and RWM_MODIFY_L) ushr 8)
+            RWM_SIZE_MASK and (((cursorRwm and RWM_MODIFY_L) ushr RWM_MODIFY_SHIFT) or ((cursorRwm and RWM_READ_L) ushr RWM_READ_SHIFT))
         }
         val initialStatement: M68kStatement = asmInstruction.parent as M68kStatement
         val localLabelName = PsiTreeUtil.findChildOfType(initialStatement, M68kLocalLabel::class.java)?.name ?: "-->"
@@ -85,7 +85,7 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
             )
         })
         backtrace.reverse()
-        val traceBits = (cursorRwm or (cursorRwm ushr 8)) and RWM_SIZE_MASK
+        val traceBits = (cursorRwm or (cursorRwm ushr RWM_MODIFY_SHIFT) or (cursorRwm ushr RWM_READ_SHIFT)) and RWM_SIZE_MASK
         backtrace.addAll(analyseFlow(register, traceBits, false, initialStatement, linesLimit) {
             PsiTreeUtil.getNextSiblingOfType(
                 it,
@@ -108,10 +108,10 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
         startingStatement: M68kStatement,
         linesLimit: Int,
         direction: (statement: M68kStatement) -> M68kStatement?
-    ): MutableList<HtmlChunk> {
+    ): List<HtmlChunk> {
         var missingBits = rwmBits
         var currStatement = startingStatement
-        val statementLines: MutableList<HtmlChunk> = ArrayList()
+        val statementLines = ArrayList<HtmlChunk>()
         val rn = register.regname
         var addAbrevDots = false
         var lines = 0
@@ -189,12 +189,12 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
 
     private fun rwmToDisplayText(rwm: Int, rn: String) =
         when (rwm) {
-            RWM_READ_B -> "reads $rn.b"
-            RWM_READ_W -> "reads $rn.w"
-            RWM_READ_L -> "reads $rn.l"
-            RWM_MODIFY_B -> "modifies $rn.b"
-            RWM_MODIFY_W -> "modifies $rn.w"
-            RWM_MODIFY_L -> "modifies $rn.l"
+            RWM_READ_B -> "uses $rn.b"
+            RWM_READ_W -> "uses $rn.w"
+            RWM_READ_L -> "uses $rn.l"
+            RWM_MODIFY_B -> "changes $rn.b"
+            RWM_MODIFY_W -> "changes $rn.w"
+            RWM_MODIFY_L -> "changes $rn.l"
             RWM_SET_B -> "sets $rn.b"
             RWM_SET_W -> "sets $rn.w"
             RWM_SET_L -> "sets $rn.l"
@@ -210,30 +210,6 @@ class M68kRegisterFlowDocumentationProvider : AbstractDocumentationProvider() {
         )
         .children(DocumentationMarkup.SECTION_CONTENT_CELL.child(HtmlChunk.nbsp()))
 
-    private fun evaluateRegisterUse(
-        asmInstruction: M68kAsmInstruction,
-        adrMode: AllowedAdrMode,
-        register: Register
-    ): List<Int> {
-        val opSize = getOpSizeOrDefault(asmInstruction.asmOp.opSize, adrMode)
-
-        val rwm1 = modifyRwmWithOpsize((adrMode.modInfo ushr RWM_OP1_SHIFT) and RWM_OP_MASK, opSize)
-        val rwm2 = if (asmInstruction.addressingModeList.size > 1) modifyRwmWithOpsize((adrMode.modInfo ushr RWM_OP2_SHIFT) and RWM_OP_MASK, opSize) else 0
-        return getReadWriteModifyRegisters(asmInstruction.addressingModeList[0], rwm1).asSequence()
-            .plus(getReadWriteModifyRegisters(asmInstruction.addressingModeList.getOrNull(1), rwm2))
-            .plus(getOtherReadWriteModifyRegisters(adrMode.modInfo))
-            .filter { it.first == register }
-            .map { it.second }
-            .toList()
-    }
-
-    private fun checkIfInstructionUsesRegister(instruction: M68kAsmInstruction, register: Register): Boolean {
-        if (instruction.addressingModeList.isEmpty()) {
-            return false
-        }
-        return instruction.addressingModeList.any { aml -> getReadWriteModifyRegisters(aml, 0).any { it.first == register } }
-    }
-
     override fun getCustomDocumentationElement(editor: Editor, file: PsiFile, contextElement: PsiElement?, targetOffset: Int): PsiElement? {
         if (contextElement == null) return null
         if (contextElement is M68kDataRegister || contextElement is M68kAddressRegister) return contextElement

src/main/java/de/platon42/intellij/plugins/m68k/inspections/M68kDeadWriteInspection.kt

@@ -0,0 +1,104 @@
+package de.platon42.intellij.plugins.m68k.inspections
+
+import com.intellij.codeInspection.InspectionManager
+import com.intellij.codeInspection.ProblemDescriptor
+import com.intellij.codeInspection.ProblemHighlightType
+import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.util.SmartList
+import de.platon42.intellij.plugins.m68k.asm.*
+import de.platon42.intellij.plugins.m68k.asm.M68kIsa.findMatchingInstructions
+import de.platon42.intellij.plugins.m68k.psi.*
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.checkIfInstructionUsesRegister
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.evaluateRegisterUse
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.findExactIsaDataAndAllowedAdrModeForInstruction
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.getConcreteTestedCcFromMnemonic
+
+class M68kDeadWriteInspection : AbstractBaseM68kLocalInspectionTool() {
+
+    companion object {
+        private const val DISPLAY_NAME = "Dead writes to registers"
+
+        private const val DEAD_WRITE_MSG_TEMPLATE = "Register %s is overwritten later without being used"
+        private const val POSSIBLY_DEAD_WRITE_MSG_TEMPLATE = "Register %s is overwritten later (only CC evaluated?)"
+    }
+
+    override fun getDisplayName() = DISPLAY_NAME
+
+    override fun checkAsmInstruction(asmInstruction: M68kAsmInstruction, manager: InspectionManager, isOnTheFly: Boolean): Array<ProblemDescriptor>? {
+        val asmOp = asmInstruction.asmOp
+        if (asmInstruction.addressingModeList.isEmpty()) return emptyArray()
+
+        val isaDataCandidates = findMatchingInstructions(asmOp.mnemonic)
+        if (isaDataCandidates.isEmpty()) return emptyArray()
+        val (_, adrMode) = findExactIsaDataAndAllowedAdrModeForInstruction(asmInstruction) ?: return emptyArray()
+
+        val opSize = M68kIsaUtil.getOpSizeOrDefault(asmInstruction.asmOp.opSize, adrMode)
+        val rwm1 = M68kIsaUtil.modifyRwmWithOpsize((adrMode.modInfo ushr RWM_OP1_SHIFT) and RWM_OP_MASK, opSize)
+        val rwm2 = if (asmInstruction.addressingModeList.size > 1) M68kIsaUtil.modifyRwmWithOpsize(
+            (adrMode.modInfo ushr RWM_OP2_SHIFT) and RWM_OP_MASK, opSize
+        ) else 0
+        val regsWritten = M68kAddressModeUtil.getReadWriteModifyRegisters(asmInstruction.addressingModeList[0], rwm1).asSequence()
+            .plus(M68kAddressModeUtil.getReadWriteModifyRegisters(asmInstruction.addressingModeList.getOrNull(1), rwm2))
+            .plus(M68kAddressModeUtil.getOtherReadWriteModifyRegisters(adrMode.modInfo))
+            .filter { (it.second and RWM_SET_L) > 0 }
+            .distinct()
+            .toList()
+
+        val hints = SmartList<ProblemDescriptor>()
+        for (regPair in regsWritten) {
+            val register = regPair.first
+            var rwm = regPair.second
+            var currStatement = asmInstruction.parent as M68kStatement
+
+            var ccModification = adrMode.affectedCc
+            var ccOverwritten = false
+            var ccTested = false
+            var hasModification = false
+
+            while (true) {
+                currStatement = PsiTreeUtil.getNextSiblingOfType(currStatement, M68kStatement::class.java) ?: break
+                val globalLabel = PsiTreeUtil.findChildOfType(currStatement, M68kGlobalLabel::class.java)
+                if (globalLabel != null) break
+                if (PsiTreeUtil.getChildOfType(currStatement, M68kPreprocessorDirective::class.java) != null) break
+
+                // as we cannot evaluate macros right now, abort at macros containing the register name (only lower case for simplicity)
+                val macroCall = PsiTreeUtil.getChildOfType(currStatement, M68kMacroCall::class.java)
+                if (macroCall?.exprList?.any { it.textMatches(register.regname) } == true) break
+
+                val currAsmInstruction = PsiTreeUtil.getChildOfType(currStatement, M68kAsmInstruction::class.java) ?: continue
+                val (isaData, currAdrMode) = findExactIsaDataAndAllowedAdrModeForInstruction(currAsmInstruction) ?: continue
+                if (isaData.changesControlFlow) break
+                val testedCc = getConcreteTestedCcFromMnemonic(currAsmInstruction.asmOp.mnemonic, isaData, currAdrMode)
+                if (((testedCc and ccModification) > 0) && !ccOverwritten) ccTested = true
+                if (currAdrMode.affectedCc != 0) ccOverwritten = true
+                if (checkIfInstructionUsesRegister(currAsmInstruction, register)) {
+                    val totalRwms = evaluateRegisterUse(currAsmInstruction, currAdrMode, register).reduce(Int::or)
+                    if (totalRwms and RWM_READ_L > 0) break
+                    if (totalRwms and RWM_MODIFY_L > 0) {
+                        hasModification = true
+                        ccOverwritten = false
+                        ccModification = ccModification or currAdrMode.affectedCc
+                        rwm = (totalRwms ushr RWM_MODIFY_SHIFT) and RWM_SET_L
+                    }
+                    if (totalRwms and RWM_SET_L >= rwm) {
+                        if (ccTested && hasModification) {
+                            break
+                        }
+                        hints.add(
+                            manager.createProblemDescriptor(
+                                asmInstruction,
+                                asmInstruction,
+                                (if (ccTested) POSSIBLY_DEAD_WRITE_MSG_TEMPLATE else DEAD_WRITE_MSG_TEMPLATE).format(register.regname),
+                                if (ccTested) ProblemHighlightType.WEAK_WARNING else ProblemHighlightType.WARNING,
+                                isOnTheFly
+                            )
+                        )
+                        break
+                    }
+                }
+            }
+        }
+        return hints.toTypedArray()
+    }
+}

src/main/java/de/platon42/intellij/plugins/m68k/inspections/M68kSyntaxInspection.kt

@@ -133,7 +133,6 @@ class M68kSyntaxInspection : AbstractBaseM68kLocalInspectionTool() {
                 )
             }
             
-
             val supportedOpSizes = findSupportedOpSizes(matchingModeIsaDataIgnoringSize, op1, op2, specialReg)
             return arrayOf(
                 when (supportedOpSizes) {

src/main/java/de/platon42/intellij/plugins/m68k/inspections/M68kUnexpectedConditionalInstructionInspection.kt

@@ -0,0 +1,54 @@
+package de.platon42.intellij.plugins.m68k.inspections
+
+import com.intellij.codeInspection.InspectionManager
+import com.intellij.codeInspection.ProblemDescriptor
+import com.intellij.codeInspection.ProblemHighlightType
+import com.intellij.psi.util.PsiTreeUtil
+import de.platon42.intellij.plugins.m68k.asm.M68kIsa.findMatchingInstructions
+import de.platon42.intellij.plugins.m68k.psi.*
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil
+import de.platon42.intellij.plugins.m68k.utils.M68kIsaUtil.findExactIsaDataAndAllowedAdrModeForInstruction
+
+class M68kUnexpectedConditionalInstructionInspection : AbstractBaseM68kLocalInspectionTool() {
+
+    companion object {
+        private const val DISPLAY_NAME = "Unaffected condition codes before conditional instruction"
+
+        private const val UNAFFECTED_CONDITION_CODES_MSG_TEMPLATE = "Condition codes unaffected by instruction (%s - %s)"
+    }
+
+    override fun getDisplayName() = DISPLAY_NAME
+
+    override fun checkAsmInstruction(asmInstruction: M68kAsmInstruction, manager: InspectionManager, isOnTheFly: Boolean): Array<ProblemDescriptor>? {
+        val asmOp = asmInstruction.asmOp
+        if (asmInstruction.addressingModeList.isEmpty()) return emptyArray()
+
+        val isaDataCandidates = findMatchingInstructions(asmOp.mnemonic)
+        if (isaDataCandidates.isEmpty()) return emptyArray()
+        val (isaData, adrMode) = findExactIsaDataAndAllowedAdrModeForInstruction(asmInstruction) ?: return emptyArray()
+        if ((adrMode.affectedCc > 0) || (adrMode.testedCc > 0) || isaData.changesControlFlow) return emptyArray()
+
+        var currStatement = asmInstruction.parent as M68kStatement
+        while (true) {
+            currStatement = PsiTreeUtil.getNextSiblingOfType(currStatement, M68kStatement::class.java) ?: break
+            val globalLabel = PsiTreeUtil.findChildOfType(currStatement, M68kGlobalLabel::class.java)
+            if (globalLabel != null) break
+            if (PsiTreeUtil.findChildOfAnyType(currStatement, M68kMacroCall::class.java, M68kPreprocessorDirective::class.java) != null) break
+            val currAsmInstruction = PsiTreeUtil.getChildOfType(currStatement, M68kAsmInstruction::class.java) ?: continue
+            val (currIsaData, currAdrMode) = findExactIsaDataAndAllowedAdrModeForInstruction(currAsmInstruction) ?: break
+            val testedCc = M68kIsaUtil.getConcreteTestedCcFromMnemonic(currAsmInstruction.asmOp.mnemonic, currIsaData, currAdrMode)
+            if (testedCc == 0) break
+
+            return arrayOf(
+                manager.createProblemDescriptor(
+                    asmInstruction,
+                    asmInstruction,
+                    UNAFFECTED_CONDITION_CODES_MSG_TEMPLATE.format(isaData.mnemonic, isaData.description),
+                    ProblemHighlightType.WARNING,
+                    isOnTheFly
+                )
+            )
+        }
+        return emptyArray()
+    }
+}

src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kAddressModeUtil.kt

@@ -43,8 +43,8 @@ object M68kAddressModeUtil {
             is M68kProgramCounterIndirectWithDisplacementOldAddressingMode,
             is M68kAbsoluteAddressAddressingMode -> emptyList()
 
-            is M68kAddressRegisterIndirectPostIncAddressingMode -> listOf(Register.getRegFromName(addressingMode.addressRegister.text) to RWM_MODIFY_L)
-            is M68kAddressRegisterIndirectPreDecAddressingMode -> listOf(Register.getRegFromName(addressingMode.addressRegister.text) to RWM_MODIFY_L)
+            is M68kAddressRegisterIndirectPostIncAddressingMode -> listOf(Register.getRegFromName(addressingMode.addressRegister.text) to (RWM_READ_L or RWM_MODIFY_L))
+            is M68kAddressRegisterIndirectPreDecAddressingMode -> listOf(Register.getRegFromName(addressingMode.addressRegister.text) to (RWM_READ_L or RWM_MODIFY_L))
             is M68kWithAddressRegisterIndirect -> {
                 if (addressingMode is M68kWithIndexRegister) {
                     listOf(

src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kLookupUtil.kt

@@ -11,7 +11,7 @@ import de.platon42.intellij.plugins.m68k.stubs.M68kSymbolDefinitionStubIndex
 object M68kLookupUtil {
 
     fun findAllGlobalLabels(project: Project): List<M68kGlobalLabel> {
-        val results: MutableList<M68kGlobalLabel> = ArrayList()
+        val results = ArrayList<M68kGlobalLabel>()
         StubIndex.getInstance().processAllKeys(M68kGlobalLabelStubIndex.KEY, project)
         {
             results.addAll(StubIndex.getElements(M68kGlobalLabelStubIndex.KEY, it, project, GlobalSearchScope.allScope(project), M68kGlobalLabel::class.java))
@@ -21,7 +21,7 @@ object M68kLookupUtil {
     }
 
     fun findAllGlobalLabels(file: M68kFile): List<M68kGlobalLabel> {
-        val results: MutableList<M68kGlobalLabel> = ArrayList()
+        val results = ArrayList<M68kGlobalLabel>()
         StubIndex.getInstance().processAllKeys(
             M68kGlobalLabelStubIndex.KEY,
             {
@@ -44,7 +44,7 @@ object M68kLookupUtil {
 
     fun findAllLocalLabels(globalLabel: M68kGlobalLabel): List<M68kLocalLabel> {
         val statement = PsiTreeUtil.getStubOrPsiParentOfType(globalLabel, M68kStatement::class.java)!!
-        val results: MutableList<M68kLocalLabel> = ArrayList()
+        val results = ArrayList<M68kLocalLabel>()
         var currentStatement = PsiTreeUtil.getNextSiblingOfType(statement, M68kStatement::class.java)
         while (currentStatement != null) {
             val child = currentStatement.firstChild
@@ -56,7 +56,7 @@ object M68kLookupUtil {
     }
 
     fun findAllSymbolDefinitions(project: Project): List<M68kSymbolDefinition> {
-        val results: MutableList<M68kSymbolDefinition> = ArrayList()
+        val results = ArrayList<M68kSymbolDefinition>()
         StubIndex.getInstance().processAllKeys(M68kSymbolDefinitionStubIndex.KEY, project)
         {
             results.addAll(
@@ -74,7 +74,7 @@ object M68kLookupUtil {
     }
 
     fun findAllSymbolDefinitions(file: M68kFile): List<M68kSymbolDefinition> {
-        val results: MutableList<M68kSymbolDefinition> = ArrayList()
+        val results = ArrayList<M68kSymbolDefinition>()
         StubIndex.getInstance().processAllKeys(
             M68kSymbolDefinitionStubIndex.KEY,
             {
@@ -97,7 +97,7 @@ object M68kLookupUtil {
 
 
     fun findAllMacroDefinitions(project: Project): List<M68kMacroDefinition> {
-        val results: MutableList<M68kMacroDefinition> = ArrayList()
+        val results = ArrayList<M68kMacroDefinition>()
         StubIndex.getInstance().processAllKeys(M68kMacroDefinitionStubIndex.KEY, project)
         {
             results.addAll(
@@ -115,7 +115,7 @@ object M68kLookupUtil {
     }
 
     fun findAllMacroDefinitions(file: M68kFile): List<M68kMacroDefinition> {
-        val results: MutableList<M68kMacroDefinition> = ArrayList()
+        val results = ArrayList<M68kMacroDefinition>()
         StubIndex.getInstance().processAllKeys(
             M68kMacroDefinitionStubIndex.KEY,
             {
@@ -135,6 +135,4 @@ object M68kLookupUtil {
     }
 
     fun findAllMacroDefinitionNames(project: Project): Collection<String> = StubIndex.getInstance().getAllKeys(M68kMacroDefinitionStubIndex.KEY, project)
-
-
 }

src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kPsiImplUtil.kt

@@ -117,7 +117,7 @@ object M68kPsiImplUtil {
     // RegisterListAddressingMode
     @JvmStatic
     fun getRegisters(element: M68kRegisterListAddressingMode): Set<Register> {
-        val registers: MutableSet<Register> = HashSet()
+        val registers = HashSet<Register>()
         element.registerList.forEach { registers.add(Register.getRegFromName(it.text)) }
         element.registerRangeList.forEach {
             var startReg = Register.getRegFromName(it.startRegister.text)

src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kChooseByNameContributor.kt

@@ -19,7 +19,7 @@ class M68kChooseByNameContributor : ChooseByNameContributorEx {
 //    }
 
 //    override fun getItemsByName(name: String, pattern: String, project: Project, includeNonProjectItems: Boolean): Array<NavigationItem> {
-//        val result: MutableList<NavigationItem> = ArrayList()
+//        val result = ArrayList<NavigationItem>()
 //        processElementsWithName(name, result::add, FindSymbolParameters.wrap(pattern, project, includeNonProjectItems))
 //        return result.toTypedArray()
 //    }

src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kGlobalLabelSymbolReference.kt

@@ -28,7 +28,7 @@ class M68kGlobalLabelSymbolReference(element: M68kSymbolReference) :
             val refName = ref.element.symbolName
             val project = ref.element.project
 
-            val targets: MutableList<M68kNamedElement> = SmartList()
+            val targets = SmartList<M68kNamedElement>()
             StubIndex.getInstance()
                 .processElements(M68kGlobalLabelStubIndex.KEY, refName, project, GlobalSearchScope.allScope(project), M68kGlobalLabel::class.java)
                 {

src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kLocalLabelReference.kt

@@ -21,7 +21,7 @@ class M68kLocalLabelReference(element: M68kSymbolReference) : PsiPolyVariantRefe
 
         fun findLocalLabels(element: M68kSymbolReference, predicate: (M68kLocalLabel) -> Boolean): List<M68kLocalLabel> {
             val statement = PsiTreeUtil.getStubOrPsiParentOfType(element, M68kStatement::class.java)!!
-            val results: MutableList<M68kLocalLabel> = SmartList()
+            val results = SmartList<M68kLocalLabel>()
             // go backward
             var currentStatement = PsiTreeUtil.getPrevSiblingOfType(statement, M68kStatement::class.java)
             while (currentStatement != null) {

src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kMacroReference.kt

@@ -25,7 +25,7 @@ class M68kMacroReference(element: M68kMacroCall) :
             val macroName = ref.element.macroName
             val project = ref.element.project
 
-            val targets: MutableList<M68kMacroDefinition> = SmartList()
+            val targets = SmartList<M68kMacroDefinition>()
             StubIndex.getInstance()
                 .processElements(M68kMacroDefinitionStubIndex.KEY, macroName, project, GlobalSearchScope.allScope(project), M68kMacroDefinition::class.java)
                 {

src/main/java/de/platon42/intellij/plugins/m68k/utils/M68kIsaUtil.kt

@@ -1,6 +1,7 @@
 package de.platon42.intellij.plugins.m68k.utils
 
 import de.platon42.intellij.plugins.m68k.asm.*
+import de.platon42.intellij.plugins.m68k.asm.ConditionCode.Companion.getCcFromMnemonic
 import de.platon42.intellij.plugins.m68k.psi.M68kAddressModeUtil
 import de.platon42.intellij.plugins.m68k.psi.M68kAsmInstruction
 import de.platon42.intellij.plugins.m68k.psi.M68kSpecialRegisterDirectAddressingMode
@@ -34,6 +35,30 @@ object M68kIsaUtil {
         return matchedIsaData.map { it to M68kIsa.findMatchingAddressMode(it.modes, op1, op2, opSize, specialReg) }
     }
 
+    fun checkIfInstructionUsesRegister(instruction: M68kAsmInstruction, register: Register): Boolean {
+        if (instruction.addressingModeList.isEmpty()) {
+            return false
+        }
+        return instruction.addressingModeList.any { aml -> M68kAddressModeUtil.getReadWriteModifyRegisters(aml, 0).any { it.first == register } }
+    }
+
+    fun evaluateRegisterUse(asmInstruction: M68kAsmInstruction, adrMode: AllowedAdrMode, register: Register): List<Int> {
+        val opSize = getOpSizeOrDefault(asmInstruction.asmOp.opSize, adrMode)
+
+        val rwm1 = modifyRwmWithOpsize((adrMode.modInfo ushr RWM_OP1_SHIFT) and RWM_OP_MASK, opSize)
+        val rwm2 = if (asmInstruction.addressingModeList.size > 1) modifyRwmWithOpsize((adrMode.modInfo ushr RWM_OP2_SHIFT) and RWM_OP_MASK, opSize) else 0
+        return M68kAddressModeUtil.getReadWriteModifyRegisters(asmInstruction.addressingModeList[0], rwm1).asSequence()
+            .plus(M68kAddressModeUtil.getReadWriteModifyRegisters(asmInstruction.addressingModeList.getOrNull(1), rwm2))
+            .plus(M68kAddressModeUtil.getOtherReadWriteModifyRegisters(adrMode.modInfo))
+            .filter { it.first == register }
+            .map { it.second }
+            .distinct()
+            .toList()
+    }
+
+    fun getConcreteTestedCcFromMnemonic(mnemonic: String, isaData: IsaData, adrMode: AllowedAdrMode) =
+        if (isaData.conditionCodes.isNotEmpty()) getCcFromMnemonic(isaData.mnemonic, mnemonic).testedCc else adrMode.testedCc
+
     fun getOpSizeOrDefault(opSize: Int, adrMode: AllowedAdrMode): Int {
         if (opSize == OP_UNSIZED && (adrMode.size != OP_UNSIZED)) {
             return if ((adrMode.size and OP_SIZE_W) == OP_SIZE_W) {

src/main/resources/META-INF/plugin.xml

@@ -50,6 +50,12 @@
         <localInspection implementationClass="de.platon42.intellij.plugins.m68k.inspections.M68kSyntaxInspection"
                          displayName="Assembly instruction validity" groupName="M68k"
                          enabledByDefault="true" level="ERROR"/>
+        <localInspection implementationClass="de.platon42.intellij.plugins.m68k.inspections.M68kDeadWriteInspection"
+                         displayName="Dead writes to registers" groupName="M68k"
+                         enabledByDefault="true" level="WARNING"/>
+        <localInspection implementationClass="de.platon42.intellij.plugins.m68k.inspections.M68kUnexpectedConditionalInstructionInspection"
+                         displayName="Unaffected condition codes before conditional instruction" groupName="M68k"
+                         enabledByDefault="true" level="WARNING"/>
     </extensions>
 
     <actions>

src/main/resources/inspectionDescriptions/M68kDeadWrite.html

@@ -0,0 +1,15 @@
+<html>
+<body>
+Finds dead writes to registers, i.e. writes that will not have any effect.
+
+Issues a weak warning if the instruction affects only condition codes that are later tested.
+
+Analysis is terminated at the next global label or instruction that reads the register or changes control flow
+(or preprocessor statements, like conditional IF statements).
+<!-- tooltip end -->
+<p>Note: As there is no evaluation of macros right now, the inspection might report some false positives.
+
+    As an attempt to reduce these false positives, macros containing the register name will abort the analysis.
+</p>
+</body>
+</html>

src/main/resources/inspectionDescriptions/M68kUnexpectedConditionalInstruction.html

@@ -0,0 +1,18 @@
+<html>
+<body>
+Usually, it is expected that an instruction checking the condition codes or using
+the condition codes is preceded by an instruction that actually affects the condition
+codes. This inspection checks that this is the case.
+
+For example, the 'movea' and 'adda' instructions (which can be (and are!) often written
+as 'move' and 'add') do not affect the condition codes and a conditional branch
+will not work as expected.
+
+However, this does not need to be a programming error. Advanced coders sometimes
+make use of the fact that instructions do not change condition codes and thus
+optimize the order of execution.
+
+<!-- tooltip end -->
+Analysis is terminated at the next global label, macrocall or preprocessor statement.
+</body>
+</html>

src/test/java/de/platon42/intellij/plugins/m68k/documentation/M68kInstructionDocumentationProviderTest.kt

@@ -19,7 +19,47 @@ internal class M68kInstructionDocumentationProviderTest : AbstractDocumentationP
         )
         assertThat(generateDocumentation(myFixture)).isEqualToIgnoringWhitespace(
             """
-<div class="definition"><pre><b>Move Quick</b></pre></div><div class="content"><table class="sections"><tr><td class="section" valign="top">Mnemonic</td><td class="section" valign="top">Op1</td><td class="section" valign="top">Op2</td></tr><tr><td valign="top"><div>moveq.l</div></td><td valign="top"><div>#&lt;xxx&gt;</div></td><td valign="top"><div>Dn</div></td></tr></table></div>
+<div class="definition">
+    <pre><b>Move Quick</b></pre>
+</div>
+<div class="content">
+    <table class="sections">
+        <tr>
+            <td class="section" valign="top">Mnemonic / CCs</td>
+            <td class="section" valign="top">Operand 1</td>
+            <td class="section" valign="top">Operand 2</td>
+        </tr>
+        <tr>
+            <td valign="top">moveq.l
+                <hr/>
+                Condition Codes: <br/>
+                <table class="sections">
+                    <tr>
+                        <td class="section" valign="top">X</td>
+                        <td class="section" valign="top">N</td>
+                        <td class="section" valign="top">Z</td>
+                        <td class="section" valign="top">V</td>
+                        <td class="section" valign="top">C</td>
+                    </tr>
+                    <tr>
+                        <td valign="top">-</td>
+                        <td valign="top">*</td>
+                        <td valign="top">*</td>
+                        <td valign="top">0</td>
+                        <td valign="top">0</td>
+                    </tr>
+                </table>
+                X - Not affected<br/>N - From result (usually if negative)<br/>Z - From result (usually if zero)<br/>V - Always cleared<br/>C - Always cleared
+            </td>
+            <td valign="top">
+                <div>#&lt;xxx&gt;</div>
+            </td>
+            <td valign="top">
+                <div>Dn</div>
+            </td>
+        </tr>
+    </table>
+</div>
 """
         )
     }
@@ -39,15 +79,13 @@ internal class M68kInstructionDocumentationProviderTest : AbstractDocumentationP
 <div class="content">
     <table class="sections">
         <tr>
-            <td class="section" valign="top">Mnemonic</td>
-            <td class="section" valign="top">Op1</td>
-            <td class="section" valign="top">Op2</td>
+            <td class="section" valign="top">Mnemonic / CCs</td>
+            <td class="section" valign="top">Operand</td>
         </tr>
         <tr>
-            <td valign="top">
-                <div>bra.s</div>
-                <div>bra.b</div>
-                <div>bra.w</div>
+            <td valign="top">bra.s<br/>bra.b<br/>bra.w
+                <hr/>
+                Condition Codes: <br/>Not affected.
             </td>
             <td valign="top">
                 <div>(xxx).w|l</div>

src/test/java/de/platon42/intellij/plugins/m68k/documentation/M68kRegisterFlowDocumentationProviderTest.kt

@@ -11,7 +11,7 @@ import org.junit.jupiter.api.extension.ExtendWith
 internal class M68kRegisterFlowDocumentationProviderTest : AbstractDocumentationProviderTest() {
 
     @Test
-    internal fun check_documentation_for_a_register_in_code_flow(@MyFixture myFixture: CodeInsightTestFixture) {
+    internal fun check_documentation_for_a_read_register_in_code_flow(@MyFixture myFixture: CodeInsightTestFixture) {
         myFixture.configureByText(
             "documentme.asm", """
 label
@@ -34,7 +34,7 @@ nextlabel
         assertThat(generateDocumentation(myFixture))
             .isEqualToIgnoringWhitespace(
                 """
-<div class="definition">move instruction reads d0.w</div>
+<div class="definition">move instruction uses d0.w</div>
 <table class="sections" style="padding-left: 8pt; padding-right: 8pt">
     <tr>
         <td valign="top">        </td>
@@ -44,7 +44,7 @@ nextlabel
     <tr>
         <td valign="top">        </td>
         <td valign="top"><code>add.w #1,<font color="#ffc800">d0</font></code></td>
-        <td valign="top"> ; modifies d0.w</td>
+        <td valign="top"> ; changes d0.w</td>
     </tr>
     <tr>
         <td valign="top">&nbsp;</td>
@@ -56,7 +56,7 @@ nextlabel
     <tr>
         <td valign="top">        </td>
         <td valign="top"><code>move.w <font color="#ffc800">d0</font>,d1</code></td>
-        <td valign="top"> ; reads d0.w</td>
+        <td valign="top"> ; uses d0.w</td>
     </tr>
     <tr>
         <td valign="top">        </td>
@@ -66,7 +66,7 @@ nextlabel
     <tr>
         <td valign="top">        </td>
         <td valign="top"><code>addq.b #1,<font color="#ffc800">d0</font></code></td>
-        <td valign="top"> ; modifies d0.b</td>
+        <td valign="top"> ; changes d0.b</td>
     </tr>
     <tr>
         <td valign="top">--&gt;</td>
@@ -76,7 +76,7 @@ nextlabel
     <tr>
         <td valign="top">        </td>
         <td valign="top"><code>move.l <font color="#ffc800">d0</font>,d2</code></td>
-        <td valign="top"> ; reads d0.l</td>
+        <td valign="top"> ; uses d0.l</td>
     </tr>
     <tr>
         <td valign="top">&nbsp;</td>
@@ -96,7 +96,88 @@ nextlabel
         <td valign="top"> ; <font color="#00ff00">sets d0.l</font></td>
     </tr>
 </table>
-            """.trimIndent()
+"""
+            )
+    }
+
+
+    @Test
+    internal fun check_documentation_for_a_written_register_in_code_flow(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.configureByText(
+            "documentme.asm", """
+label
+    moveq.l #0,d0
+    add.w   #1,d0
+    move.l  d1,-(sp)
+    move.w  d0,d1
+    move.b  d2,d0
+    addq.b  #1,d0
+    move.w  d0,d<caret>1
+    move.l  d0,d2
+    move.w  d1,d2
+    clr.b   d0
+    moveq.l #0,d0
+    move.l  (sp)+,d1
+    rts
+nextlabel
+"""
+        )
+        assertThat(generateDocumentation(myFixture))
+            .isEqualToIgnoringWhitespace(
+                """
+<div class="definition">move instruction sets d1.w</div>
+<table class="sections" style="padding-left: 8pt; padding-right: 8pt">
+    <tr>
+        <td colspan="3" valign="top"><b>label</b></td>
+    </tr>
+    <tr>
+        <td valign="top">        </td>
+        <td valign="top"><code>move.l <font color="#ffc800">d1</font>,-(sp)</code></td>
+        <td valign="top"> ; uses d1.l</td>
+    </tr>
+    <tr>
+        <td valign="top">        </td>
+        <td valign="top"><code>move.w d0,<font color="#ffc800">d1</font></code></td>
+        <td valign="top"> ; sets d1.w</td>
+    </tr>
+    <tr>
+        <td valign="top">&nbsp;</td>
+        <td valign="top">
+            <div class="grayed">[...]</div>
+        </td>
+        <td valign="top">&nbsp;</td>
+    </tr>
+    <tr>
+        <td valign="top">--&gt;</td>
+        <td valign="top"><b><code>move.w d0,<font color="#ffc800">d1</font></code></b></td>
+        <td valign="top"> ; &lt;--</td>
+    </tr>
+    <tr>
+        <td valign="top">&nbsp;</td>
+        <td valign="top">
+            <div class="grayed">[...]</div>
+        </td>
+        <td valign="top">&nbsp;</td>
+    </tr>
+    <tr>
+        <td valign="top">        </td>
+        <td valign="top"><code>move.w <font color="#ffc800">d1</font>,d2</code></td>
+        <td valign="top"> ; uses d1.w</td>
+    </tr>
+    <tr>
+        <td valign="top">&nbsp;</td>
+        <td valign="top">
+            <div class="grayed">[...]</div>
+        </td>
+        <td valign="top">&nbsp;</td>
+    </tr>
+    <tr>
+        <td valign="top">        </td>
+        <td valign="top"><code>move.l (sp)+,<font color="#ffc800">d1</font></code></td>
+        <td valign="top"> ; <font color="#00ff00">sets d1.l</font></td>
+    </tr>
+</table>
+"""
             )
     }
 }

src/test/java/de/platon42/intellij/plugins/m68k/inspections/AbstractInspectionTest.kt

@@ -11,6 +11,7 @@ import org.junit.jupiter.api.extension.ExtendWith
 @ExtendWith(LightCodeInsightExtension::class)
 @TestDataPath("src/test/resources/inspections")
 abstract class AbstractInspectionTest : AbstractM68kTest() {
+
     protected fun assertHighlightings(myFixture: CodeInsightTestFixture, count: Int, snippet: String) {
         assertThat(myFixture.doHighlighting())
             .areExactly(count, Condition({ it.description?.contains(snippet) ?: false }, "containing"))

src/test/java/de/platon42/intellij/plugins/m68k/inspections/M68kDeadWriteInspectionTest.kt

@@ -0,0 +1,211 @@
+package de.platon42.intellij.plugins.m68k.inspections
+
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import de.platon42.intellij.jupiter.MyFixture
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+internal class M68kDeadWriteInspectionTest : AbstractInspectionTest() {
+
+    @Test
+    internal fun find_direct_dead_write_to_register(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.l   d0,d2
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun find_direct_dead_write_to_register_with_modification(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.l   d0,d1
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun no_dead_write_to_register_due_to_part_modification(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d1,d0
+    moveq.l #123,d1
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun use_of_condition_code_causes_weak_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    scc     d0
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later (only CC evaluated?)")
+    }
+
+    @Test
+    internal fun use_of_conditional_instruction_for_non_conditional_causes_full_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    st      d0
+    moveq.l #123,d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d1 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun use_of_condition_code_after_modification_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d0,d1
+    seq     .foo
+    moveq.l #123,d1
+.foo
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun use_of_control_flow_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.l  #123,d1
+    add.b   d0,d1
+    bra.s   .foo
+    moveq.l #123,d1
+.foo
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun movem_can_cause_multiple_warnings(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    movem.l (a0),d0-d7
+    add.l   d0,d1
+    moveq.l #123,d3
+    clr.l   #123,d6
+    movem.l (a0),d5-d7
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d5 is overwritten later without being used")
+        assertHighlightings(myFixture, 1, "Register d6 is overwritten later without being used")
+        assertHighlightings(myFixture, 1, "Register d7 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun overwrite_in_same_instruction_with_read_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.w  (a0,d3.w),d3
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun partial_overwrite_in_causes_no_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.b  d2,d3
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun oversized_overwrite_in_causes_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    move.w  #123,d3
+    move.l  d2,d3
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d3 is overwritten later without being used")
+    }
+
+    @Test
+    internal fun conditional_write_does_not_cause_a_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    IF  0
+    move.w  #123,d3
+    ELSE
+    clr.w   d3
+    ENDC
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun modification_extending_width_does_not_cause_a_warning_on_smaller_write_later(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+	move.b  (a0)+,d0
+	lsl     #8,d0
+	move.b  (a0)+,d0
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun macro_call_with_register_name_will_not_cause_a_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    moveq.l #-1,d0
+    COPRMOVE d0,bltafwm
+    move.l  pd_CurrPlanesPtr(a4),d0
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun macro_call_with_different_register_name_will_cause_a_warning(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kDeadWriteInspection::class.java)
+        myFixture.configureByText(
+            "deadwrite.asm", """
+    moveq.l #-1,d0
+    COPRMOVE d1,bltafwm
+    move.l  pd_CurrPlanesPtr(a4),d0
+        """
+        )
+        assertHighlightings(myFixture, 1, "Register d0 is overwritten later without being used")
+    }
+}

src/test/java/de/platon42/intellij/plugins/m68k/inspections/M68kUnexpectedConditionalInstructionInspectionTest.kt

@@ -0,0 +1,74 @@
+package de.platon42.intellij.plugins.m68k.inspections
+
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
+import de.platon42.intellij.jupiter.MyFixture
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+internal class M68kUnexpectedConditionalInstructionInspectionTest : AbstractInspectionTest() {
+
+    @Test
+    internal fun movea_causes_warning_when_used_for_conditional_branching(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kUnexpectedConditionalInstructionInspection::class.java)
+        myFixture.configureByText(
+            "unexpectedcc.asm", """
+    move.l  d0,a1
+    bne.s   .cont
+    rts
+.cont
+        """
+        )
+        assertHighlightings(myFixture, 1, "Condition codes unaffected by instruction (movea - Move Address)")
+    }
+
+    @Test
+    internal fun no_warning_on_consecutive_conditional_branches(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kUnexpectedConditionalInstructionInspection::class.java)
+        myFixture.configureByText(
+            "unexpectedcc.asm", """
+	move.b  P61_arplist(pc,d0),d0
+	beq.b   .arp0
+	bmi.b   .arp1
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun no_warning_on_macro_call_inbetween(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kUnexpectedConditionalInstructionInspection::class.java)
+        myFixture.configureByText(
+            "unexpectedcc.asm", """
+    move.l  pd_PalCurShamPalPtr(a4),a1
+    PALSTEPDOWN
+    bne.s   .loopline
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun no_warning_flow_control_instruction(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kUnexpectedConditionalInstructionInspection::class.java)
+        myFixture.configureByText(
+            "unexpectedcc.asm", """
+    bsr     foo
+    bne.s   .loopline
+        """
+        )
+        assertThat(myFixture.doHighlighting()).isEmpty()
+    }
+
+    @Test
+    internal fun warning_on_conditional_set_series_with_suba(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.enableInspections(M68kUnexpectedConditionalInstructionInspection::class.java)
+        myFixture.configureByText(
+            "unexpectedcc.asm", """
+    sub.l   a0,a0
+    seq     d0
+    sne     d1
+        """
+        )
+        assertHighlightings(myFixture, 1, "Condition codes unaffected by instruction (suba - Subtract Address)")
+    }
+}