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Re: GCC viciously beaten by ICC in trig test!

From: Segher Boessenkool <segher at kernel dot crashing dot org>
To: Gabriel Dos Reis <gdr at integrable-solutions dot net>
Cc: gcc at gcc dot gnu dot org, Scott Robert Ladd <coyote at coyotegulch dot com>, Roger Sayle <roger at eyesopen dot com>
Date: Mon, 15 Mar 2004 15:34:43 +0100
Subject: Re: GCC viciously beaten by ICC in trig test!
References: <Pine.LNX.4.44.0403141713460.12909-100000@www.eyesopen.com> <40551459.8050909@coyotegulch.com> <m365d6u8dv.fsf@uniton.integrable-solutions.net>

Note that it has been reported in the past the the x86 native
instruction fsin yields incorrect results for values outside or a
certain interval (I can't remember which exactly).


+/- 2**63, on i387.  Original pentium is supposed to be 1 ulp
accurate for all valid inputs (no idea if it actually is).

Don't know for other chips.

Segher

Follow-Ups:
- Re: GCC viciously beaten by ICC in trig test!
  - From: Geert Bosch

References:
- Re: GCC viciously beaten by ICC in trig test!
  - From: Roger Sayle
- Re: GCC viciously beaten by ICC in trig test!
  - From: Scott Robert Ladd
- Re: GCC viciously beaten by ICC in trig test!
  - From: Gabriel Dos Reis

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