add jump admin instructions

Author: CharlieTap

ir/src/commonMain/kotlin/io/github/charlietap/chasm/ir/instruction/AdminInstruction.kt

@@ -1,8 +1,50 @@
 package io.github.charlietap.chasm.ir.instruction
 
+import io.github.charlietap.chasm.type.ReferenceType
+
 sealed interface AdminInstruction : Instruction {
 
     data object EndBlock : AdminInstruction
 
     data object EndFunction : AdminInstruction
+
+    data class Jump(
+        val offset: Int,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
+
+    data class JumpIf(
+        val offset: Int,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
+
+    data class JumpTable(
+        val offsets: List<Int>,
+        val defaultOffset: Int,
+        val adjustments: List<StackAdjustment>,
+    ) : AdminInstruction
+
+    data class JumpOnNull(
+        val offset: Int,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
+
+    data class JumpOnNonNull(
+        val offset: Int,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
+
+    data class JumpOnCast(
+        val offset: Int,
+        val srcReferenceType: ReferenceType,
+        val dstReferenceType: ReferenceType,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
+
+    data class JumpOnCastFail(
+        val offset: Int,
+        val srcReferenceType: ReferenceType,
+        val dstReferenceType: ReferenceType,
+        val adjustment: StackAdjustment,
+    ) : AdminInstruction
 }

ir/src/commonMain/kotlin/io/github/charlietap/chasm/ir/instruction/StackAdjustment.kt

@@ -0,0 +1,24 @@
+package io.github.charlietap.chasm.ir.instruction
+
+import kotlin.jvm.JvmInline
+
+fun StackAdjustment(
+    depth: Int,
+    keep: Int,
+): StackAdjustment {
+    val encoded = (depth.toLong() shl 32) or (keep.toLong() and 0xFFFFFFFFL)
+    return StackAdjustment(encoded)
+}
+
+@JvmInline
+value class StackAdjustment(
+    @PublishedApi internal val encoded: Long,
+) {
+    inline val depth: Int
+        get() = (encoded ushr 32).toInt()
+
+    inline val keep: Int
+        get() = (encoded and 0xFFFFFFFF).toInt()
+
+    override fun toString(): String = "StackAdjustment(depth=$depth, keep=$keep)"
+}

predecoder/src/commonMain/kotlin/io/github/charlietap/chasm/predecoder/instruction/admin/AdminInstructionPredecoder.kt

@@ -32,5 +32,12 @@ internal inline fun AdminInstructionPredecoder(
     when (instruction) {
         is AdminInstruction.EndBlock -> endBlockDispatcher(EndBlock)
         is AdminInstruction.EndFunction -> endFunctionDispatcher(EndFunction)
+        is AdminInstruction.Jump -> TODO()
+        is AdminInstruction.JumpIf -> TODO()
+        is AdminInstruction.JumpOnCast -> TODO()
+        is AdminInstruction.JumpOnCastFail -> TODO()
+        is AdminInstruction.JumpOnNonNull -> TODO()
+        is AdminInstruction.JumpOnNull -> TODO()
+        is AdminInstruction.JumpTable -> TODO()
     }
 }

predecoder/src/commonMain/kotlin/io/github/charlietap/chasm/predecoder/instruction/control/ControlInstructionPredecoder.kt

@@ -7,22 +7,6 @@ import io.github.charlietap.chasm.predecoder.Predecoder
 import io.github.charlietap.chasm.predecoder.PredecodingContext
 import io.github.charlietap.chasm.runtime.dispatch.DispatchableInstruction
 import io.github.charlietap.chasm.runtime.error.ModuleTrapError
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.Br
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrIf
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrOnCast
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrOnCastFail
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrOnNonNull
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrOnNull
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.BrTable
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.CallIndirect
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.CallRef
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.Nop
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.Return
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.ReturnCallIndirect
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.ReturnCallRef
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.Throw
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.ThrowRef
-import io.github.charlietap.chasm.runtime.instruction.ControlInstruction.Unreachable
 
 internal fun ControlInstructionPredecoder(
     context: PredecodingContext,