Add WASM br instruction

3 files changed, 10 insertions, 1 deletions

diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBr.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBr.java
new file mode 100644
index 00000000..90c3eb94
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmBr.java
@@ -0,0 +1,4 @@
+package org.shedlang.compiler.backends.wasm.structure.ast.instructions;
+
+public record WasmBr(int labelIndex) implements WasmInstruction {
+}
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmInstruction.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmInstruction.java
index 28ddcc7c..8de6c0b1 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmInstruction.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/instructions/WasmInstruction.java
@@ -1,4 +1,4 @@
 package org.shedlang.compiler.backends.wasm.structure.ast.instructions;
 
-public sealed interface WasmInstruction permits WasmBlock, WasmCall, WasmCallIndirect, WasmDrop, WasmGlobalGet, WasmGlobalSet, WasmI32Add, WasmI32Const, WasmI32Eq, WasmI32Load, WasmI32Ne, WasmI32Store, WasmI32Sub, WasmI64Const, WasmIf, WasmLocalGet, WasmLocalSet, WasmLoop, WasmMemoryAddressConst, WasmMemoryGrow, WasmReturn, WasmTableElementIndexConst {
+public sealed interface WasmInstruction permits WasmBlock, WasmBr, WasmCall, WasmCallIndirect, WasmDrop, WasmGlobalGet, WasmGlobalSet, WasmI32Add, WasmI32Const, WasmI32Eq, WasmI32Load, WasmI32Ne, WasmI32Store, WasmI32Sub, WasmI64Const, WasmIf, WasmLocalGet, WasmLocalSet, WasmLoop, WasmMemoryAddressConst, WasmMemoryGrow, WasmReturn, WasmTableElementIndexConst {
 }
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructions.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructions.java
index 6eb91258..c0d6d484 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructions.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/binary/WasmBinaryFormatInstructions.java
@@ -53,6 +53,11 @@ public class WasmBinaryFormatInstructions {
                 writer.writeByte(0x0b);
             }
 
+            case WasmBr br -> {
+                writer.writeByte(0x0c);
+                writer.writeUnsignedInt32(br.labelIndex());
+            }
+
             case WasmReturn ignored -> {
                 writer.writeByte(0x0f);
             }