alpha.h (MASK_SUPPORT_ARCH, [...]): Define such that MASK_SUPPORT_ARCH is not negative.

h
        * alpha.h (MASK_SUPPORT_ARCH, MASK_CPU_EV5, MASK_CPU_EV6): Define
        such that MASK_SUPPORT_ARCH is not negative.

From-SVN: r27765

gcc/config/alpha/alpha.h

@@ -157,14 +157,14 @@ extern enum alpha_fp_trap_mode alpha_fptm;
 
 /* This means that the processor is an EV5, EV56, or PCA56.  This is defined
    only in TARGET_CPU_DEFAULT.  */
-#define MASK_CPU_EV5	(1 << 29)
+#define MASK_CPU_EV5	(1 << 28)
 
 /* Likewise for EV6.  */
-#define MASK_CPU_EV6	(1 << 30)
+#define MASK_CPU_EV6	(1 << 29)
 
 /* This means we support the .arch directive in the assembler.  Only
    defined in TARGET_CPU_DEFAULT.  */
-#define MASK_SUPPORT_ARCH (1 << 31)
+#define MASK_SUPPORT_ARCH (1 << 30)
 #define TARGET_SUPPORT_ARCH	(target_flags & MASK_SUPPORT_ARCH)
 
 /* These are for target os support and cannot be changed at runtime.  */