RFC: remove the "tile" architecture from glibc

[Joseph Myers]

On Wed, 31 Jan 2018, Adhemerval Zanella wrote:

> I will work on ia64 and sh4 results this week.

Looking at the sh4 results you posted on the wiki, I see you note many NaN 
issues.

It seems from sh manuals that sh in fact uses the same reversed quiet / 
signaling NaN convention as hppa and older mips (I haven't checked if 
J-Core keeps this peculiarity - if it doesn't, that's a new ABI).  So to 
fix those failures, you need:

* Fix GCC to use mips_single_format / mips_double_format on sh (and 
preferably backport this to active release branches so those generate the 
correct NaNs there).

* Fix (with bug filed first, as a user-visible issue) glibc to know the 
NaN format for sh as well (nan-high-order-bit.h needed, and 
sysdeps/sh/soft-fp/sfp-machine.h should have _FP_QNANNEGATEDP and 
_FP_NANFRAC_* updated as in the non-NAN2008 case of 
sysdeps/mips/mips32/sfp-machine.h).

Given those fixed, you might then get more meaningful test results for 
sh4.

-- 
Joseph S. Myers
joseph@codesourcery.com