+# define SSE_POSSIBLE
+#endif
+
+#ifdef SSE_PRESENT
+# define SSE_POSSIBLE
+#endif
+
+#ifdef NO_SSE
+# undef SSE_PRESENT
+# undef SSE_POSSIBLE
+# undef SSE2_PRESENT
+#endif
+
+#ifdef SSE2_PRESENT
+#define Sys_HaveSSE() true
+#define Sys_HaveSSE2() true
+#elif defined(SSE_POSSIBLE)
+// runtime detection of SSE/SSE2 capabilities for x86
+qboolean Sys_HaveSSE(void);
+qboolean Sys_HaveSSE2(void);
+#else
+#define Sys_HaveSSE() false
+#define Sys_HaveSSE2() false