diff options
Diffstat (limited to 'sysdeps/libm-i387/e_logl.S')
| -rw-r--r-- | sysdeps/libm-i387/e_logl.S | 51 |
1 files changed, 47 insertions, 4 deletions
diff --git a/sysdeps/libm-i387/e_logl.S b/sysdeps/libm-i387/e_logl.S index 4c1550e929..1657dfd5fb 100644 --- a/sysdeps/libm-i387/e_logl.S +++ b/sysdeps/libm-i387/e_logl.S @@ -9,9 +9,52 @@ RCSID("$NetBSD: $") + +#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(__ieee754_logl) - fldln2 - fldt 4(%esp) - fyl2x + fldln2 // log(2) + fldt 4(%esp) // x : log(2) +#ifdef PIC + call 1f +1: popl %edx + addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %edx +#endif + fld %st // x : x : log(2) + fsubl MO(one) // x-1 : x : log(2) + fld %st // x-1 : x-1 : x : log(2) + fabs // |x-1| : x-1 : x : log(2) + fcompl MO(limit) // x-1 : x : log(2) + fnstsw // x-1 : x : log(2) + sahf + ja 2f + fstp %st(1) // x-1 : log(2) + fyl2xp1 // log(x) + ret + +2: fincstp // x : log(2) + fyl2x // log(x) ret -PSEUDO_END(__ieee754_logl) +END (__ieee754_logl) |