Re: [PATCH] Fix abs.[sd] and neg.[sd] emulation for NaN operands

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

On Mon, 10 May 2010 11:37:10 -0700, Chris Dearman <chris@mips.com> wrote:
> >>    if (xc == IEEE754_CLASS_SNAN) {
> >> -          SETCX(IEEE754_INVALID_OPERATION);
> >> -          return ieee754dp_nanxcpt(ieee754dp_indef(), "neg");
> >> +          return ieee754dp_nanxcpt(ieee754dp_indef(), "abs");
> >>    }
...
> ieee754dp/sp_nanxcpt also sets the invalid exception bit so I think this 
> is duplicated code. I think the same fix should have been applied to 
> ieee754sp_neg/ieee754dp_neg for consistency.

ieee754d/sp_nanxcpt will set the invalid exception bit if its first
argument was a signaling NaN.  And ieee754dp/sp_indef() is a quiet
NaN.

---
Atsushi Nemoto