[PATCH] do not use .set mips2 on mips64

[Atsushi Nemoto]

The ".set mips2" downgrades the ISA level on mips64 (which implies at
least mips3).  Do not use it if mips64.

diff -urNp uClibc-20060611/libc/sysdeps/linux/mips/bits/atomicity.h uClibc/libc/sysdeps/linux/mips/bits/atomicity.h
--- uClibc-20060611/libc/sysdeps/linux/mips/bits/atomicity.h	2006-06-11 16:11:24.000000000 +0900
+++ uClibc/libc/sysdeps/linux/mips/bits/atomicity.h	2006-07-05 22:04:44.000000000 +0900
@@ -32,7 +32,9 @@ exchange_and_add (volatile uint32_t *mem
     ("/* Inline exchange & add */\n"
      "1:\n\t"
      ".set	push\n\t"
+#ifndef __mips64
      ".set	mips2\n\t"
+#endif
      "ll	%0,%3\n\t"
      "addu	%1,%4,%0\n\t"
      "sc	%1,%2\n\t"
@@ -56,7 +58,9 @@ atomic_add (volatile uint32_t *mem, int 
     ("/* Inline atomic add */\n"
      "1:\n\t"
      ".set	push\n\t"
+#ifndef __mips64
      ".set	mips2\n\t"
+#endif
      "ll	%0,%2\n\t"
      "addu	%0,%3,%0\n\t"
      "sc	%0,%1\n\t"
@@ -78,7 +82,9 @@ compare_and_swap (volatile long int *p, 
     ("/* Inline compare & swap */\n"
      "1:\n\t"
      ".set	push\n\t"
+#ifndef __mips64
      ".set	mips2\n\t"
+#endif
      "ll	%1,%5\n\t"
      "move	%0,$0\n\t"
      "bne	%1,%3,2f\n\t"