diff --git a/WasmNet.Core/WasmCompiler.cs b/WasmNet.Core/WasmCompiler.cs
index deb5393..49369d2 100644
--- a/WasmNet.Core/WasmCompiler.cs
+++ b/WasmNet.Core/WasmCompiler.cs
@@ -188,34 +188,34 @@ private void CompileInstruction(WasmInstruction instruction)
             case WasmOpcode.I32Ne or WasmOpcode.I64Ne or WasmOpcode.F32Ne or WasmOpcode.F64Ne:
                 NotEqual();
                 break;
-            case WasmOpcode.I32LtS:
+            case WasmOpcode.I32LtS or WasmOpcode.I64LtS:
                 Clt();
                 break;
-            case WasmOpcode.I32LtU:
+            case WasmOpcode.I32LtU or WasmOpcode.I64LtU:
                 Clt_Un();
                 break;
-            case WasmOpcode.I32GtS:
+            case WasmOpcode.I32GtS or WasmOpcode.I64GtS:
                 Cgt();
                 break;
-            case WasmOpcode.I32GtU:
+            case WasmOpcode.I32GtU or WasmOpcode.I64GtU:
                 Cgt_Un();
                 break;
-            case WasmOpcode.I32GeS:
+            case WasmOpcode.I32GeS or WasmOpcode.I64GeS:
                 // >= is the same as !(<)
                 Clt();
                 I32Eqz();
                 break;
-            case WasmOpcode.I32GeU:
+            case WasmOpcode.I32GeU or WasmOpcode.I64GeU:
                 // >= is the same as !(<)
                 Clt_Un();
                 I32Eqz();
                 break;
-            case WasmOpcode.I32LeS:
+            case WasmOpcode.I32LeS or WasmOpcode.I64LeS:
                 // <= is the same as !(>)
                 Cgt();
                 I32Eqz();
                 break;
-            case WasmOpcode.I32LeU:
+            case WasmOpcode.I32LeU or WasmOpcode.I64LeU:
                 // <= is the same as !(>)
                 Cgt_Un();
                 I32Eqz();
diff --git a/WasmNet.Core/WasmOpcode.cs b/WasmNet.Core/WasmOpcode.cs
index 9ef3d61..9af9db1 100644
--- a/WasmNet.Core/WasmOpcode.cs
+++ b/WasmNet.Core/WasmOpcode.cs
@@ -54,6 +54,14 @@ public enum WasmOpcode
     I64Eqz = 0x50,
     I64Eq = 0x51,
     I64Ne = 0x52,
+    I64LtS = 0x53,
+    I64LtU = 0x54,
+    I64GtS = 0x55,
+    I64GtU = 0x56,
+    I64LeS = 0x57,
+    I64LeU = 0x58,
+    I64GeS = 0x59,
+    I64GeU = 0x5A,
     F32Eq = 0x5B,
     F32Ne = 0x5C,
     F64Eq = 0x61,
diff --git a/WasmNet.Core/WasmReader.cs b/WasmNet.Core/WasmReader.cs
index c0e5a82..fdbdedc 100644
--- a/WasmNet.Core/WasmReader.cs
+++ b/WasmNet.Core/WasmReader.cs
@@ -543,6 +543,14 @@ or WasmOpcode.I64Load32S
             case WasmOpcode.I64Eqz:
             case WasmOpcode.I64Eq:
             case WasmOpcode.I64Ne:
+            case WasmOpcode.I64LtS:
+            case WasmOpcode.I64LtU:
+            case WasmOpcode.I64GtS:
+            case WasmOpcode.I64GtU:
+            case WasmOpcode.I64LeS:
+            case WasmOpcode.I64LeU:
+            case WasmOpcode.I64GeS:
+            case WasmOpcode.I64GeU:
             case WasmOpcode.F32Add:
             case WasmOpcode.F32Sub:
             case WasmOpcode.F32Mul:
diff --git a/WasmNet.Tests/IntegrationTests/0062-I32GeS.wat b/WasmNet.Tests/IntegrationTests/0062-I32GeS.wat
index 11c9186..4b0174c 100644
--- a/WasmNet.Tests/IntegrationTests/0062-I32GeS.wat
+++ b/WasmNet.Tests/IntegrationTests/0062-I32GeS.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:0)
 
 (module
-    (memory 1)
     (func (export "ges") (result i32)
         i32.const 10
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0063-I32LtS.wat b/WasmNet.Tests/IntegrationTests/0063-I32LtS.wat
index d242a6f..b081c38 100644
--- a/WasmNet.Tests/IntegrationTests/0063-I32LtS.wat
+++ b/WasmNet.Tests/IntegrationTests/0063-I32LtS.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:1)
 
 (module
-    (memory 1)
     (func (export "lts") (result i32)
         i32.const 10
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0064-I32LeS.wat b/WasmNet.Tests/IntegrationTests/0064-I32LeS.wat
index 38dcd2b..31b0b3d 100644
--- a/WasmNet.Tests/IntegrationTests/0064-I32LeS.wat
+++ b/WasmNet.Tests/IntegrationTests/0064-I32LeS.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:1)
 
 (module
-    (memory 1)
     (func (export "les") (result i32)
         i32.const 42
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0065-I32GtS.wat b/WasmNet.Tests/IntegrationTests/0065-I32GtS.wat
index 49ad2a1..29ce8d8 100644
--- a/WasmNet.Tests/IntegrationTests/0065-I32GtS.wat
+++ b/WasmNet.Tests/IntegrationTests/0065-I32GtS.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:0)
 
 (module
-    (memory 1)
     (func (export "gts") (result i32)
         i32.const 42
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0077-I32GeU.wat b/WasmNet.Tests/IntegrationTests/0077-I32GeU.wat
index c5ce8a7..144817e 100644
--- a/WasmNet.Tests/IntegrationTests/0077-I32GeU.wat
+++ b/WasmNet.Tests/IntegrationTests/0077-I32GeU.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:0)
 
 (module
-    (memory 1)
     (func (export "geu") (result i32)
         i32.const 10
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0078-I32LtU.wat b/WasmNet.Tests/IntegrationTests/0078-I32LtU.wat
index 4bbb71c..d881603 100644
--- a/WasmNet.Tests/IntegrationTests/0078-I32LtU.wat
+++ b/WasmNet.Tests/IntegrationTests/0078-I32LtU.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:1)
 
 (module
-    (memory 1)
     (func (export "ltu") (result i32)
         i32.const 10
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0079-I32LeU.wat b/WasmNet.Tests/IntegrationTests/0079-I32LeU.wat
index b86b9f8..01a89df 100644
--- a/WasmNet.Tests/IntegrationTests/0079-I32LeU.wat
+++ b/WasmNet.Tests/IntegrationTests/0079-I32LeU.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:1)
 
 (module
-    (memory 1)
     (func (export "leu") (result i32)
         i32.const 42
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0080-I32GtU.wat b/WasmNet.Tests/IntegrationTests/0080-I32GtU.wat
index 1cfb7fd..0ff5a14 100644
--- a/WasmNet.Tests/IntegrationTests/0080-I32GtU.wat
+++ b/WasmNet.Tests/IntegrationTests/0080-I32GtU.wat
@@ -2,7 +2,6 @@
 ;; expect: (i32:0)
 
 (module
-    (memory 1)
     (func (export "gtu") (result i32)
         i32.const 42
         i32.const 42
diff --git a/WasmNet.Tests/IntegrationTests/0109-I64LtS.wat b/WasmNet.Tests/IntegrationTests/0109-I64LtS.wat
new file mode 100644
index 0000000..43a08bb
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0109-I64LtS.wat
@@ -0,0 +1,10 @@
+;; invoke: lts
+;; expect: (i32:1)
+
+(module
+    (func (export "lts") (result i32)
+        i64.const -10
+        i64.const 42
+        i64.lt_s
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0110-I64LtU.wat b/WasmNet.Tests/IntegrationTests/0110-I64LtU.wat
new file mode 100644
index 0000000..32cf937
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0110-I64LtU.wat
@@ -0,0 +1,10 @@
+;; invoke: ltu
+;; expect: (i32:1)
+
+(module
+    (func (export "ltu") (result i32)
+        i64.const 10
+        i64.const 42
+        i64.lt_u
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0111-I64GtS.wat b/WasmNet.Tests/IntegrationTests/0111-I64GtS.wat
new file mode 100644
index 0000000..d94cbca
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0111-I64GtS.wat
@@ -0,0 +1,10 @@
+;; invoke: gts
+;; expect: (i32:1)
+
+(module
+    (func (export "gts") (result i32)
+        i64.const 42
+        i64.const -42
+        i64.gt_s
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0112-I64GtU.wat b/WasmNet.Tests/IntegrationTests/0112-I64GtU.wat
new file mode 100644
index 0000000..9341c48
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0112-I64GtU.wat
@@ -0,0 +1,10 @@
+;; invoke: gtu
+;; expect: (i32:1)
+
+(module
+    (func (export "gtu") (result i32)
+        i64.const 42
+        i64.const 1
+        i64.gt_u
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0113-I64LeS.wat b/WasmNet.Tests/IntegrationTests/0113-I64LeS.wat
new file mode 100644
index 0000000..819b16b
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0113-I64LeS.wat
@@ -0,0 +1,10 @@
+;; invoke: les
+;; expect: (i32:1)
+
+(module
+    (func (export "les") (result i32)
+        i64.const -42
+        i64.const -42
+        i64.le_s
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0114-I64LeU.wat b/WasmNet.Tests/IntegrationTests/0114-I64LeU.wat
new file mode 100644
index 0000000..47e34cf
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0114-I64LeU.wat
@@ -0,0 +1,10 @@
+;; invoke: leu
+;; expect: (i32:1)
+
+(module
+    (func (export "leu") (result i32)
+        i64.const 42
+        i64.const 42
+        i64.le_u
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0115-I64GeS.wat b/WasmNet.Tests/IntegrationTests/0115-I64GeS.wat
new file mode 100644
index 0000000..6b75c63
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0115-I64GeS.wat
@@ -0,0 +1,10 @@
+;; invoke: ges
+;; expect: (i32:1)
+
+(module
+    (func (export "ges") (result i32)
+        i64.const -42
+        i64.const -42
+        i64.ge_s
+    )
+)
\ No newline at end of file
diff --git a/WasmNet.Tests/IntegrationTests/0116-I64GeU.wat b/WasmNet.Tests/IntegrationTests/0116-I64GeU.wat
new file mode 100644
index 0000000..61c7aa6
--- /dev/null
+++ b/WasmNet.Tests/IntegrationTests/0116-I64GeU.wat
@@ -0,0 +1,10 @@
+;; invoke: geu
+;; expect: (i32:1)
+
+(module
+    (func (export "geu") (result i32)
+        i64.const 42
+        i64.const 42
+        i64.ge_u
+    )
+)
\ No newline at end of file