diff --git a/src/frontend/A64/decoder/a64.inc b/src/frontend/A64/decoder/a64.inc
index fae18f1c..4b694665 100644
--- a/src/frontend/A64/decoder/a64.inc
+++ b/src/frontend/A64/decoder/a64.inc
@@ -678,7 +678,7 @@ INST(NOT,                    "NOT",                                       "0Q101
 //INST(SADDL,                  "SADDL, SADDL2",                             "0Q001110zz1mmmmm000000nnnnnddddd")
 INST(SADDW,                  "SADDW, SADDW2",                             "0Q001110zz1mmmmm000100nnnnnddddd")
 //INST(SSUBL,                  "SSUBL, SSUBL2",                             "0Q001110zz1mmmmm001000nnnnnddddd")
-//INST(SSUBW,                  "SSUBW, SSUBW2",                             "0Q001110zz1mmmmm001100nnnnnddddd")
+INST(SSUBW,                  "SSUBW, SSUBW2",                             "0Q001110zz1mmmmm001100nnnnnddddd")
 //INST(ADDHN,                  "ADDHN, ADDHN2",                             "0Q001110zz1mmmmm010000nnnnnddddd")
 //INST(SABAL,                  "SABAL, SABAL2",                             "0Q001110zz1mmmmm010100nnnnnddddd")
 //INST(SUBHN,                  "SUBHN, SUBHN2",                             "0Q001110zz1mmmmm011000nnnnnddddd")
diff --git a/src/frontend/A64/translate/impl/impl.h b/src/frontend/A64/translate/impl/impl.h
index 2cdbc1f2..c2e3d453 100644
--- a/src/frontend/A64/translate/impl/impl.h
+++ b/src/frontend/A64/translate/impl/impl.h
@@ -805,7 +805,7 @@ struct TranslatorVisitor final {
     bool SADDL(bool Q, Imm<2> size, Reg Rm, Reg Rn, Vec Vd);
     bool SADDW(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd);
     bool SSUBL(bool Q, Imm<2> size, Reg Rm, Reg Rn, Vec Vd);
-    bool SSUBW(bool Q, Imm<2> size, Reg Rm, Vec Vn, Vec Vd);
+    bool SSUBW(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd);
     bool ADDHN(bool Q, Imm<2> size, Vec Vm, Vec Vn, Reg Rd);
     bool SABAL(bool Q, Imm<2> size, Reg Rm, Reg Rn, Vec Vd);
     bool SUBHN(bool Q, Imm<2> size, Vec Vm, Vec Vn, Reg Rd);
diff --git a/src/frontend/A64/translate/impl/simd_three_different.cpp b/src/frontend/A64/translate/impl/simd_three_different.cpp
index e8503079..ef0c8647 100644
--- a/src/frontend/A64/translate/impl/simd_three_different.cpp
+++ b/src/frontend/A64/translate/impl/simd_three_different.cpp
@@ -24,6 +24,22 @@ bool TranslatorVisitor::SADDW(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
     return true;
 }
 
+bool TranslatorVisitor::SSUBW(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
+    if (size == 0b11) {
+        return ReservedValue();
+    }
+
+    const size_t esize = 8 << size.ZeroExtend();
+    const size_t part = Q ? 1 : 0;
+
+    const IR::U128 operand1 = V(128, Vn);
+    const IR::U128 operand2 = ir.VectorSignExtend(esize, Vpart(64, Vm, part));
+    const IR::U128 result = ir.VectorSub(esize * 2, operand1, operand2);
+
+    V(128, Vd, result);
+    return true;
+}
+
 bool TranslatorVisitor::UADDW(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
     if (size == 0b11) {
         return ReservedValue();