+/**
+ * Returns the value Zero represented in this mode.
+ *
+ * Zero is the additive neutral element and as such
+ * is defined only for modes allowing addition, i.e.
+ * floats and ints, and references (NULL-Pointer)
+ * else returns tarval_bad.
+ */
+tarval *get_mode_null(ir_mode *mode);
+
+/**
+ * Returns the value One, represented in this mode.
+ *
+ * One, being the multiplicative neutral element,
+ * is defined only for modes allowing multiplication,
+ * i.e. ints and floats.
+ */
+tarval *get_mode_one(ir_mode *mode);
+
+/**
+ * Returns the positive infinite value of a mode.
+ *
+ * This is only valid for float_numbers, other modes
+ * will result in tarval_bad.
+ */
+tarval *get_mode_infinite(ir_mode *mode);
+
+/**
+ * Returns the NAN value of a given mode.
+ *
+ * This is only valid for float_numbers, other modes
+ * will result in tarval_bad.
+ */
+tarval *get_mode_NAN(ir_mode *mode);
+
+extern ir_mode *mode_M; /**< memory */
+
+/* -- A set of predifined, numerical modes according to Techreport 1999-44 -- */
+extern ir_mode *mode_F; /**< signed float(32) */
+extern ir_mode *mode_D; /**< signed double(64) */
+extern ir_mode *mode_E; /**< signed extended(80) */
+extern ir_mode *mode_Bs; /**< signed byte (former char) */
+extern ir_mode *mode_Bu; /**< unsigned byte (former char) */
+extern ir_mode *mode_Hs; /**< signed short integer */
+extern ir_mode *mode_Hu; /**< unsigened short integer */
+extern ir_mode *mode_Is; /**< signed integer */
+extern ir_mode *mode_Iu; /**< unsigned integer */
+extern ir_mode *mode_Ls; /**< signed long integer */
+extern ir_mode *mode_Lu; /**< unsigned long integer */
+
+extern ir_mode *mode_C; /**< 8 bit char */
+extern ir_mode *mode_U; /**< 16 bit unicode char */
+
+extern ir_mode *mode_P; /**< pointer */
+extern ir_mode *mode_P_mach; /**< A pointer mode that is set by the client of libfirm. This mode
+ represents the pointer size of the target machine. Is initialized
+ to mode_P. */
+
+/* -- Auxiliary modes necessary for the Firm representation -- */
+extern ir_mode *mode_b; /**< internal boolean */
+
+extern ir_mode *mode_X; /**< execution */
+extern ir_mode *mode_BB; /**< block */
+
+extern ir_mode *mode_T; /**< tuple (none) */
+extern ir_mode *mode_ANY;/**< undefined mode */
+extern ir_mode *mode_BAD;/**< bad mode */
+
+/*@{*/
+/** Access routines for JNI Interface */
+ir_mode *get_modeF(void);
+ir_mode *get_modeD(void);
+ir_mode *get_modeE(void);
+ir_mode *get_modeBs(void);
+ir_mode *get_modeBu(void);
+ir_mode *get_modeHs(void);
+ir_mode *get_modeHu(void);
+ir_mode *get_modeIs(void);
+ir_mode *get_modeIu(void);
+ir_mode *get_modeLs(void);
+ir_mode *get_modeLu(void);
+ir_mode *get_modeC(void);
+ir_mode *get_modeU(void);
+ir_mode *get_modeP(void);
+ir_mode *get_modeb(void);
+ir_mode *get_modeX(void);
+ir_mode *get_modeBB(void);
+ir_mode *get_modeM(void);
+ir_mode *get_modeT(void);
+ir_mode *get_modeANY(void);
+ir_mode *get_modeBAD(void);
+
+/** Returns the machine specific pointer mode. */
+ir_mode *get_modeP_mach(void);
+
+/**
+ * Sets the machine specific pointer mode.
+ * If not set, the predefined mode mode_P will be used.
+ */
+void set_modeP_mach(ir_mode *p);
+
+/**
+ Functions to check, whether a modecode is signed, float, int, character,
+ reference, num, numP, data, datab or dataM.
+
+ For more exact definitions read the corresponding pages
+ in the firm documentation or the following enumeration
+
+ The set of "float" is defined as:
+ float = {irm_F, irm_D, irm_E}
+
+ The set of "int" is defined as:
+ int = {irm_Bs, irm_Bu, irm_Hs, irm_Hu, irm_Is, irm_Iu, irm_Ls, irm_Lu}
+
+ The set of "character" is defined as:
+ character = {irm_C, irm_U}
+
+ The set of "reference" is defined as:
+ reference = {irm_P}
+
+ The set of "num" is defined as:
+ num = {float || int}
+
+ The set of "numP" is defined as:
+ numP = {float || int || reference}
+
+ The set of "data" is defined as:
+ data = {num || character || reference}
+
+ The set of "datab" is defined as:
+ datab = {data || irm_b }
+
+ The set of "dataM" is defined as:
+ dataM = {data || irm_M}
+*/
+/*@}*/