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Re: Not supporting all rounding modes

From: Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>
To: thomas at codesourcery dot com
Cc: gniibe at fsij dot org, iwamatsu at nigauri dot org, libc-alpha at sourceware dot org
Date: Tue, 29 May 2012 23:13:42 +0900 (JST)
Subject: Re: Not supporting all rounding modes
References: <87396xrc7u.fsf@schwinge.name><87r4u39lwf.fsf@schwinge.name><87mx4r9k2o.fsf@schwinge.name>

Thomas Schwinge <thomas@codesourcery.com> wrote:
> Turns out this is directly from back when Kaz and Yutaka Niibe (CCed)
> added the SH glibc port, twelve years ago.  Do you guys happen to
> remember the history about these rounding modes, or would you agree to
> remove FE_UPWARD and FE_DOWNWARD from the list of supported modes?  Or,
> does SH-4-based hardware exist that supports all four modes, and we have
> to do this in a more fine-grained fashion?

I can't recall how that file was written.  AFAIK, SH FPU supports
only two rounding modes as you pointed out and the comment in fenv.h
is simply wrong.

Regards,
	kaz

References:
- Re: [PATCH 1/4 v3] [SH/SH4]: Add support fedisableexcept, feenableexcept, fegetexcept and feupdateenv
  - From: Thomas Schwinge
- Not supporting all rounding modes (was: [PATCH 1/4 v3] [SH/SH4]: Add support fedisableexcept, feenableexcept, fegetexcept and feupdateenv)
  - From: Thomas Schwinge
- Re: Not supporting all rounding modes
  - From: Thomas Schwinge

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