diff --git a/CodeEmitter/CodeEmitter/ASIMDOps.inl b/CodeEmitter/CodeEmitter/ASIMDOps.inl
index df0116ccd..648abce29 100644
--- a/CodeEmitter/CodeEmitter/ASIMDOps.inl
+++ b/CodeEmitter/CodeEmitter/ASIMDOps.inl
@@ -4534,7 +4534,16 @@ public:
   }
 
   // Cryptographic four-register
-  // TODO
+  void eor3(VRegister rd, VRegister rn, VRegister rm, VRegister ra) {
+    Crypto4Register(0b00, rm, ra, rn, rd);
+  }
+  void bcax(VRegister rd, VRegister rn, VRegister rm, VRegister ra) {
+    Crypto4Register(0b01, rm, ra, rn, rd);
+  }
+  void sm3ss1(VRegister rd, VRegister rn, VRegister rm, VRegister ra) {
+    Crypto4Register(0b10, rm, ra, rn, rd);
+  }
+
   // Cryptographic two-register SHA 512
   // TODO
   // Conversion between floating-point and fixed-point
@@ -5012,6 +5021,16 @@ private:
     dc32(Instr);
   }
 
+  void Crypto4Register(uint32_t opcode, VRegister rm, VRegister ra, VRegister rn, VRegister rd) {
+    uint32_t Instr = 0b1100'1110'0000'0000'0000'0000'0000'0000;
+    Instr |= opcode << 21;
+    Instr |= rm.Idx() << 16;
+    Instr |= ra.Idx() << 10;
+    Instr |= rn.Idx() << 5;
+    Instr |= rd.Idx();
+    dc32(Instr);
+  }
+
   // Conversion between floating-point and fixed-point
   template<typename T, typename T2>
   void ScalarConvertBetweenFPAndFixed(uint32_t S, uint32_t rmode, uint32_t opcode, uint32_t scale, ARMEmitter::Size GPRSize,
diff --git a/FEXCore/unittests/Emitter/ASIMD_Tests.cpp b/FEXCore/unittests/Emitter/ASIMD_Tests.cpp
index 1723982ed..b0bdc4b7e 100644
--- a/FEXCore/unittests/Emitter/ASIMD_Tests.cpp
+++ b/FEXCore/unittests/Emitter/ASIMD_Tests.cpp
@@ -3137,7 +3137,9 @@ TEST_CASE_METHOD(TestDisassembler, "Emitter: ASIMD: Cryptographic three-register
   TEST_SINGLE(sm4ekey(VReg::v30, VReg::v29, VReg::v15), "sm4ekey v30.4s, v29.4s, v15.4s");
 }
 TEST_CASE_METHOD(TestDisassembler, "Emitter: ASIMD: Cryptographic four-register") {
-  // TODO: Implement in emitter.
+  TEST_SINGLE(eor3(VReg::v30, VReg::v29, VReg::v15, VReg::v7), "eor3 v30.16b, v29.16b, v15.16b, v7.16b");
+  TEST_SINGLE(bcax(VReg::v30, VReg::v29, VReg::v15, VReg::v7), "bcax v30.16b, v29.16b, v15.16b, v7.16b");
+  TEST_SINGLE(sm3ss1(VReg::v30, VReg::v29, VReg::v15, VReg::v7), "sm3ss1 v30.4s, v29.4s, v15.4s, v7.4s");
 }
 TEST_CASE_METHOD(TestDisassembler, "Emitter: ASIMD: Cryptographic two-register SHA 512") {
   // TODO: Implement in emitter.