diff options
Diffstat (limited to 'newlib/libc/machine/i386/memset.S')
| -rw-r--r-- | newlib/libc/machine/i386/memset.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/memset.S b/newlib/libc/machine/i386/memset.S new file mode 100644 index 00000000000..12e33e443f4 --- /dev/null +++ b/newlib/libc/machine/i386/memset.S @@ -0,0 +1,59 @@ +/* + * ==================================================== + * Copyright (C) 1998 by Cygnus Solutions. All rights reserved. + * + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + + #include "i386mach.h" + + .global SYM (memset) + +SYM (memset): + + pushl ebp + movl esp,ebp + pushl edi + pushl ebx + movl 8(ebp),edi + movl 12(ebp),eax + movl 16(ebp),ecx + cld + +#ifndef __OPTIMIZE_SIZE__ + andl $255,eax + movl ecx,ebx + testl $3,edi + jne .L19 + cmpl $16,ecx + jbe .L19 + + movl eax,edx + sall $8,eax + orl edx,eax + + movl eax,edx + sall $16,edx + orl edx,eax + + shrl $2,ecx + andl $3,ebx + rep + stosl + movl ebx,ecx +#endif /* not __OPTIMIZE_SIZE__ */ + +.L19: + rep + stosb + + movl 8(ebp),eax + + leal -8(ebp),esp + popl ebx + popl edi + leave + ret |