diff --git a/src/dynarmic/backend/x64/emit_x64_packed.cpp b/src/dynarmic/backend/x64/emit_x64_packed.cpp
index c8f99a94..9d2002f9 100644
--- a/src/dynarmic/backend/x64/emit_x64_packed.cpp
+++ b/src/dynarmic/backend/x64/emit_x64_packed.cpp
@@ -94,8 +94,8 @@ void EmitX64::EmitPackedAddU16(EmitContext& ctx, IR::Inst* inst) {
             // !(b <= a+b) == b > a+b
             code.movdqa(tmp_a, xmm_a);
             code.movdqa(tmp_b, xmm_b);
-            code.paddw(tmp_a, code.XmmBConst<16>(xword, 0x8000));
-            code.paddw(tmp_b, code.XmmBConst<16>(xword, 0x8000));
+            code.paddw(tmp_a, code.XmmConst(xword, 0x80008000, 0));
+            code.paddw(tmp_b, code.XmmConst(xword, 0x80008000, 0));
             code.pcmpgtw(tmp_b, tmp_a);  // *Signed* comparison!
 
             ctx.reg_alloc.DefineValue(ge_inst, tmp_b);
@@ -217,8 +217,8 @@ void EmitX64::EmitPackedSubU16(EmitContext& ctx, IR::Inst* inst) {
 
     // (a >= b) == !(b > a)
     code.pcmpeqb(ones, ones);
-    code.paddw(xmm_a, code.XmmBConst<16>(xword, 0x8000));
-    code.paddw(xmm_b, code.XmmBConst<16>(xword, 0x8000));
+    code.paddw(xmm_a, code.XmmConst(xword, 0x80008000, 0));
+    code.paddw(xmm_b, code.XmmConst(xword, 0x80008000, 0));
     code.movdqa(xmm_ge, xmm_b);
     code.pcmpgtw(xmm_ge, xmm_a);  // *Signed* comparison!
     code.pxor(xmm_ge, ones);
@@ -654,7 +654,7 @@ void EmitX64::EmitPackedAbsDiffSumS8(EmitContext& ctx, IR::Inst* inst) {
     const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
 
     // TODO: Optimize with zero-extension detection
-    code.movaps(tmp, code.XmmBConst<8>(xword, 0xFF));
+    code.movaps(tmp, code.XmmConst(xword, 0x0000'0000'ffff'ffff, 0));
     code.pand(xmm_a, tmp);
     code.pand(xmm_b, tmp);
     code.psadbw(xmm_a, xmm_b);