diff options
Diffstat (limited to 'sysdeps/libm-i387/s_log2.S')
| -rw-r--r-- | sysdeps/libm-i387/s_log2.S | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/sysdeps/libm-i387/s_log2.S b/sysdeps/libm-i387/s_log2.S deleted file mode 100644 index 4632c96f67..0000000000 --- a/sysdeps/libm-i387/s_log2.S +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Written by J.T. Conklin <jtc@netbsd.org>. - * Adapted for use as log2 by Ulrich Drepper <drepper@cygnus.com>. - * Public domain. - * - * Changed to use fyl2xp1 for values near 1, <drepper@cygnus.com>. - */ - -#include <machine/asm.h> - -#ifdef __ELF__ - .section .rodata -#else - .text -#endif - .align ALIGNARG(4) - ASM_TYPE_DIRECTIVE(one,@object) -one: .double 1.0 - ASM_SIZE_DIRECTIVE(one) - /* It is not important that this constant is precise. It is only - a value which is known to be on the safe side for using the - fyl2xp1 instruction. */ - ASM_TYPE_DIRECTIVE(limit,@object) -limit: .double 0.29 - ASM_SIZE_DIRECTIVE(limit) - - -#ifdef PIC -#define MO(op) op##@GOTOFF(%edx) -#else -#define MO(op) op -#endif - - .text -ENTRY(__log2) -#ifdef PIC - call 1f -1: popl %edx - addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %edx -#endif - fldl MO(one) - fldl 4(%esp) // x : 1 - fld %st // x : x : 1 - fsub %st(2), %st // x-1 : x : 1 - fld %st // x-1 : x-1 : x : 1 - fabs // |x-1| : x-1 : x : 1 - fcompl MO(limit) // x-1 : x : 1 - fnstsw // x-1 : x : 1 - andb $0x45, %ah - jz 2f - fstp %st(1) // x-1 : 1 - fyl2xp1 // log(x) - ret - -2: fstp %st(0) // x : 1 - fyl2x // log(x) - ret -END (__log2) -weak_alias (__log2, log2) |