From d9d09e74e2850794c98f503194e425cd278d8f70 Mon Sep 17 00:00:00 2001 From: jkh Date: Fri, 19 Aug 1994 23:52:29 +0000 Subject: Latest fix from jtc: The fyl2xp1 instruction has such a limited range: -(1 - (sqrt(2) / 2)) <= x <= sqrt(2) - 1 it's not worth trying to use it. Also, I'm not sure fyl2xp1's extra precision will matter once the result is converted from extended real (80 bits) back to double real (64 bits). Reviewed by: jkh Submitted by: jtc --- lib/msun/i387/s_log1p.S | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'lib/msun/i387') diff --git a/lib/msun/i387/s_log1p.S b/lib/msun/i387/s_log1p.S index 4f14451..ad511be 100644 --- a/lib/msun/i387/s_log1p.S +++ b/lib/msun/i387/s_log1p.S @@ -35,10 +35,21 @@ #include -RCSID("$Id: s_log1p.S,v 1.1.1.1 1994/08/19 09:40:01 jkh Exp $") +RCSID("$Id: s_log1p.S,v 1.4 1994/08/19 03:55:57 jtc Exp $") +/* + * The fyl2xp1 instruction has such a limited range: + * -(1 - (sqrt(2) / 2)) <= x <= sqrt(2) - 1 + * it's not worth trying to use it. + * + * Also, I'm not sure fyl2xp1's extra precision will + * matter once the result is converted from extended + * real (80 bits) back to double real (64 bits). + */ ENTRY(log1p) fldln2 fldl 4(%esp) - fyl2xp1 + fld1 + faddp + fyl2x ret -- cgit v1.1