diff options
Diffstat (limited to 'newlib/libc/machine/i386/f_log.S')
| -rw-r--r-- | newlib/libc/machine/i386/f_log.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/f_log.S b/newlib/libc/machine/i386/f_log.S new file mode 100644 index 00000000000..8d5ea72993f --- /dev/null +++ b/newlib/libc/machine/i386/f_log.S @@ -0,0 +1,35 @@ +/* + * ==================================================== + * 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. + * ==================================================== + */ + +/* +Fast version of log using Intel float instructions. + + double _f_log (double x); + +Function calculates the log base e of x. +There is no error checking or setting of errno. +*/ + + #include "i386mach.h" + + .global SYM (_f_log) + +SYM (_f_log): + pushl ebp + movl esp,ebp + + fld1 + fldl2e + fdivrp + fldl 8(ebp) + fyl2x + + leave + ret |