+/** checks for l <= x <= h */
+#define _IN_RANGE(x, l, h) ((unsigned)((x) - (l)) <= (unsigned)((h) - (l)))
+
+/** returns true if it's Intel architecture */
+#define ARCH_INTEL(x) _IN_RANGE((x), arch_i386, arch_core)
+
+/** returns true if it's AMD architecture */
+#define ARCH_AMD(x) _IN_RANGE((x), arch_k6, arch_opteron)
+
+#define IS_P6_ARCH(x) (_IN_RANGE((x), arch_pentium_pro, arch_core) || \
+ _IN_RANGE((x), arch_athlon, arch_opteron))
+
+/** floating point support */
+typedef enum fp_support {
+ fp_none, /**< no floating point instructions are used */
+ fp_x87, /**< use x87 instructions */
+ fp_sse2 /**< use SSE2 instructions */
+} fp_support;
+
+/** Sets the used flag to the current floating point architecture. */
+#define FP_USED(cg) ((cg)->used_fp = (cg)->fp_kind)
+
+/** Returns non-zero if the current floating point architecture is SSE2. */
+#define USE_SSE2(cg) ((cg)->fp_kind == fp_sse2)
+
+/** Returns non-zero if the current floating point architecture is x87. */
+#define USE_x87(cg) ((cg)->fp_kind == fp_x87)