(CANONICALIZE_COMPARISON): New macro.

From-SVN: r7354

diff --git a/gcc/config/alpha/alpha.h b/gcc/config/alpha/alpha.h
index ba135336986c778a667dd0151542c4b72fc8be65..5b7e72eb64372b8305bb852bb476025b629b71c8 100644 (file)
--- a/gcc/config/alpha/alpha.h
+++ b/gcc/config/alpha/alpha.h
@@ -1278,6 +1278,26 @@ extern char *current_function_name;
 
 #define FLOAT_STORE_FLAG_VALUE 0.5
 
+/* Canonicalize a comparison from one we don't have to one we do have.  */
+
+#define CANONICALIZE_COMPARISON(CODE,OP0,OP1) \
+  do {                                                                 \
+    if (((CODE) == GE || (CODE) == GT || (CODE) == GEU || (CODE) == GTU) \
+       && (GET_CODE (OP1) == REG || (OP1) == const0_rtx))              \
+      {                                                                        \
+       rtx tem = (OP0);                                                \
+       (OP0) = (OP1);                                                  \
+       (OP1) = tem;                                                    \
+       (CODE) = swap_condition (CODE);                                 \
+      }                                                                        \
+    if (((CODE) == LT || (CODE) == LTU)                                        \
+       && GET_CODE (OP1) == CONST_INT && INTVAL (OP1) == 256)          \
+      {                                                                        \
+       (CODE) = (CODE) == LT ? LE : LEU;                               \
+       (OP1) = GEN_INT (255);                                          \
+      }                                                                        \
+  } while (0)
+
 /* Specify the machine mode that pointers have.
    After generation of rtl, the compiler makes no further distinction
    between pointers and any other objects of this machine mode.  */