2009-04-20 Joey Ye <joey.ye@intel.com>

[pf3gnuchains/gcc-fork.git] / gcc / real.h

diff --git a/gcc/real.h b/gcc/real.h
index 8cdf471..5a68653 100644 (file)
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -409,16 +409,18 @@ extern REAL_VALUE_TYPE dconst2;
 extern REAL_VALUE_TYPE dconstm1;
 extern REAL_VALUE_TYPE dconsthalf;
 
-/* Enumerate the special constant values we need. */
-enum real_value_const {
-  rv_e,
-  rv_third,
-  rv_sqrt2,
-  rv_max
-};
+#define dconst_e()  (*dconst_e_ptr ())
+#define dconst_third()  (*dconst_third_ptr ())
+#define dconst_sqrt2()  (*dconst_sqrt2_ptr ())
+
+/* Function to return the real value special constant 'e'.  */
+extern const REAL_VALUE_TYPE * dconst_e_ptr (void);
 
-/* Function to return a real value special constant.  */
-extern const REAL_VALUE_TYPE * get_real_const (enum real_value_const);
+/* Returns the special REAL_VALUE_TYPE corresponding to 1/3.  */
+extern const REAL_VALUE_TYPE * dconst_third_ptr (void);
+
+/* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2).  */
+extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void);
 
 /* Function to return a real value (not a tree node)
    from a given integer constant.  */
@@ -436,6 +438,11 @@ extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode);
 /* Replace R by 1/R in the given machine mode, if the result is exact.  */
 extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *);
 
+/* Return true if arithmetic on values in IMODE that were promoted
+   from values in TMODE is equivalent to direct arithmetic on values
+   in TMODE.  */
+bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode);
+
 /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node.  */
 extern tree build_real (tree, REAL_VALUE_TYPE);