machmode.h (to_machine_mode): New.

[gcc.git] / gcc / machmode.h

diff --git a/gcc/machmode.h b/gcc/machmode.h
index c8c63c7a9e442e3126fe2b6407413293d3c7eb1b..f8ff132372909671fa35edf0a3db9cd857f3816f 100644 (file)
--- a/gcc/machmode.h
+++ b/gcc/machmode.h
@@ -25,6 +25,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 /* Make an enum class that gives all the machine modes.  */
 #include "insn-modes.h"
 
+/* Given MODE as integer value, get the corresponding enum machine_mode
+   enumeration value.  */
+#define to_machine_mode(MODE)  ((enum machine_mode) (MODE))
+
 /* Get the name of mode MODE as a string.  */
 
 extern const char * const mode_name[NUM_MACHINE_MODES];
@@ -76,26 +80,15 @@ extern const unsigned char mode_class[NUM_MACHINE_MODES];
 #define SCALAR_FLOAT_MODE_P(MODE)              \
   (GET_MODE_CLASS (MODE) == MODE_FLOAT)
 
-/* Get the size in bytes of an object of mode MODE.  */
+/* Get the size in bytes and bits of an object of mode MODE.  */
 
 extern CONST_MODE_SIZE unsigned char mode_size[NUM_MACHINE_MODES];
-#define GET_MODE_SIZE(MODE)   mode_size[MODE]
-
-/* Get the size in bytes of the basic parts of an object of mode MODE.  */
+#define GET_MODE_SIZE(MODE)    ((unsigned short) mode_size[MODE])
+#define GET_MODE_BITSIZE(MODE) ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT))
 
-extern const unsigned char mode_unit_size[NUM_MACHINE_MODES];
-#define GET_MODE_UNIT_SIZE(MODE)  mode_unit_size[MODE]
-
-/* Get the number of units in the object.  */
-
-#define GET_MODE_NUNITS(MODE)  \
-  ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
-   : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
-
-/* Get the size in bits of an object of mode MODE.  */
-
-extern const unsigned short mode_bitsize[NUM_MACHINE_MODES];
-#define GET_MODE_BITSIZE(MODE)  mode_bitsize[MODE]
+/* Get the number of value bits of an object of mode MODE.  */
+extern const unsigned short mode_precision[NUM_MACHINE_MODES];
+#define GET_MODE_PRECISION(MODE)  mode_precision[MODE]
 
 /* Get a bitmask containing 1 for all bits in a word
    that fit within mode MODE.  */
@@ -104,17 +97,31 @@ extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES];
 
 #define GET_MODE_MASK(MODE) mode_mask_array[MODE]
 
-extern const unsigned char mode_inner[NUM_MACHINE_MODES];
-
 /* Return the mode of the inner elements in a vector.  */
 
+extern const unsigned char mode_inner[NUM_MACHINE_MODES];
 #define GET_MODE_INNER(MODE) mode_inner[MODE]
 
+/* Get the size in bytes of the basic parts of an object of mode MODE.  */
+
+#define GET_MODE_UNIT_SIZE(MODE)               \
+  (GET_MODE_INNER (MODE) == VOIDmode           \
+   ? GET_MODE_SIZE (MODE)                      \
+   : GET_MODE_SIZE (GET_MODE_INNER (MODE)))
+
+/* Get the number of units in the object.  */
+
+extern const unsigned char mode_nunits[NUM_MACHINE_MODES];
+#define GET_MODE_NUNITS(MODE)  mode_nunits[MODE]
+
 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI).  */
 
 extern const unsigned char mode_wider[NUM_MACHINE_MODES];
 #define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE]
 
+extern const unsigned char mode_2xwider[NUM_MACHINE_MODES];
+#define GET_MODE_2XWIDER_MODE(MODE) mode_2xwider[MODE]
+
 /* Return the mode for data of a given size SIZE and mode class CLASS.
    If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
    The value is BLKmode if no other mode is found.  */