+/**
+ * The output mode for tarval values.
+ *
+ * Some modes allow more that one representation, for instance integers
+ * can be represented hex or decimal. Of course it would be enough to have
+ * one and let every backend convert it into the 'right' one.
+ * However, we can do this in the tarval much simplier...
+ */
+typedef enum {
+ TVO_NATIVE, /**< the default output mode, depends on the mode */
+ TVO_HEX, /**< use hex representation, always possible */
+ TVO_DECIMAL, /**< use decimal representation */
+ TVO_OCTAL, /**< use octal representation */
+ TVO_BINARY, /**< use binary representation */
+ TVO_FLOAT, /**< use floating point representation (i.e 1.342e-2)*/
+ TVO_HEXFLOAT /**< use hexadecimal floating point representation (i.e 0x1.ea32p-12)*/
+} tv_output_mode;
+
+/**
+ * This structure contains helper information to format the output
+ * of a tarval of a mode.
+ */
+typedef struct tarval_mode_info {
+ tv_output_mode mode_output; /**< if != TVO_NATIVE select a special mode */
+ const char *mode_prefix; /**< if set, this prefix will be printed
+ before a value of this mode */
+ const char *mode_suffix; /**< if set, this suffix will be printed
+ after a value of this mode */
+} tarval_mode_info;
+
+/**
+ * Specify the output options of one mode.
+ *
+ * This functions stores the modinfo, so DO NOT DESTROY it.
+ *
+ * @param mode a ir_mode that should be associated
+ * @param modeinfo the output format info
+ *
+ * @return zero on success.
+ */
+int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo);
+
+/**
+ * Returns the output options of one mode.
+ *
+ * This functions returns the modinfo of a given mode.
+ *
+ * @param mode a ir_mode that should be associated
+ *
+ * @return the output option
+ */
+const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode);
+