X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Flibfirm%2Firopt.h;h=9203ef8e05139456fa981fe9a0e3a245bb0e5f5b;hb=45fc5c69b556a288c3df6058b58ad99b2d865ac5;hp=cb2fb16144b889b01f90f2310bb0136e33c7c1e5;hpb=737e5ba7fa2ce36fd096b36e9e73b5053eec1114;p=libfirm

diff --git a/include/libfirm/iropt.h b/include/libfirm/iropt.h
index cb2fb1614..9203ef8e0 100644
--- a/include/libfirm/iropt.h
+++ b/include/libfirm/iropt.h
@@ -51,20 +51,24 @@
  * - fp_model_fast:
  *     Fastest mode. Associative and distributive law allowed at the expense
  *     of floating point accuracy and correctness. Explicit rounding is disabled.
+ * - fp_no_float_fold:
+ *     Avoid floating point constant folding. Usefull for frontends which do not
+ *     create arithmetic operations in the backends arithmetic mode.
  */
 typedef enum _fp_model_t {
-	fp_explicit_rounding  =  1,  /**< Explicit rounding at assignments, typecasts, return
+	fp_explicit_rounding  = (1u << 0),  /**< Explicit rounding at assignments, typecasts, return
 	                                  and function calls. Conv nodes may NOT be removed, even
 	                                  if they look useless. */
-	fp_strict_algebraic   =  2,  /**< Strict adherence to non-associative and non-distributive
+	fp_strict_algebraic   = (1u << 1),  /**< Strict adherence to non-associative and non-distributive
 	                                  algebra unless the same result is guaranteed. */
-	fp_contradictions     =  4,  /**< FP contradictions are enabled. Only for backend. */
-	fp_strict_eval_order  =  8,  /**< FP instructions must be strict evaluated in given order. */
-	fp_exceptions         = 16,  /**< FP exceptions are supported. No reordering that changes
+	fp_contradictions     = (1u << 2),  /**< FP contradictions are enabled. Only for backend. */
+	fp_strict_eval_order  = (1u << 3),  /**< FP instructions must be strict evaluated in given order. */
+	fp_exceptions         = (1u << 4),  /**< FP exceptions are supported. No reordering that changes
 	                                  the exception flow are allowed. Backends must generate
 	                                  synchronized exception code. */
-	fp_environment_access = 32,  /**< FPU environment can be accessed. Even Constant folding
+	fp_environment_access = (1u << 5),  /**< FPU environment can be accessed. Even Constant folding
 	                                  cannot be done. */
+	fp_no_float_fold      = (1u << 6),
 
 	/** Precise floating point model. Default. */
 	fp_model_precise = fp_explicit_rounding|fp_strict_algebraic|fp_contradictions,
@@ -78,7 +82,7 @@ typedef enum _fp_model_t {
 /** If the expression referenced can be evaluated statically
  *  computed_value returns a tarval representing the result.
  *  Else returns tarval_bad. */
-tarval *computed_value(ir_node *n);
+tarval *computed_value(const ir_node *n);
 
 /** Applies all optimizations to n that are expressible as a pattern
  *  in Firm, i.e., they need not a walk of the graph.