diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2008-05-26 13:36:53 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-05-26 13:36:53 -0700 |
| commit | 1a20d3ecf5c2a6435df2b756435b1eb1c657d45b (patch) | |
| tree | 41a6bd0fce8a82fe199471a66aa9a84895544325 | |
| parent | 4b6011bc6ec71660859139ac8d28b7d0badd681c (diff) | |
x86: string_32.h: workaround for broken gcc 4.0
gcc 4.0 fails to allocate %eax for the pattern operand in the rep
store instructions used by memset; force it to do so by declaring a
register variable.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | include/asm-x86/string_32.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/asm-x86/string_32.h b/include/asm-x86/string_32.h index 8d0c593c4413..193578cd1fd9 100644 --- a/include/asm-x86/string_32.h +++ b/include/asm-x86/string_32.h @@ -267,11 +267,18 @@ void *__constant_c_and_count_memset(void *s, unsigned long pattern, asm volatile("rep ; stosl" \ x \ : "=&c" (d0), "=&D" (d1) \ - : "a" (pattern), "0" (count/4), "1" ((long)s) \ + : "a" (eax), "0" (count/4), "1" ((long)s) \ : "memory") { int d0, d1; +#if __GNUC__ == 4 && __GNUC_MINOR__ == 0 + /* Workaround for broken gcc 4.0 */ + register unsigned long eax asm("%eax") = pattern; +#else + unsigned long eax = pattern; +#endif + switch (count % 4) { case 0: COMMON(""); |