EXTRACT_I32: Support constant src1

src/xenia/cpu/backend/x64/x64_sequences.cc

@@ -6461,13 +6461,21 @@ struct EXTRACT_I32
       // e.vpshufb(e.xmm0, i.src1, e.xmm0);
       // e.vmovd(i.dest.reg().cvt32(), e.xmm0);
       // Get the desired word in xmm0, then extract that.
+      Xmm src1;
+      if (i.src1.is_constant) {
+        src1 = e.xmm1;
+        e.LoadConstantXmm(src1, i.src1.constant());
+      } else {
+        src1 = i.src1.reg();
+      }
+
       e.xor_(e.rax, e.rax);
       e.mov(e.al, i.src2);
       e.and_(e.al, 0x03);
       e.shl(e.al, 4);
       e.mov(e.rdx, reinterpret_cast<uint64_t>(extract_table_32));
       e.vmovaps(e.xmm0, e.ptr[e.rdx + e.rax]);
-      e.vpshufb(e.xmm0, i.src1, e.xmm0);
+      e.vpshufb(e.xmm0, src1, e.xmm0);
       e.vpextrd(i.dest, e.xmm0, 0);
       e.ReloadMembase();
     }