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[PATCH, alpha]: Fix sysdeps/alpha/remqu.S clobbering $f3 reg

Hello!

Attached patch fixes sysdeps/alpha/remqu.S clobbering $f3 register via
$y_is_neg path. There was missing restore of $f3 before the return
from the function.

The patch also reorders insns a bit, so it becomes similar as much as
possible to divqu.S.

Without the patch, math/big testcase from Go-1.11 testsuite (that
includes lots of corner cases that exercise remqu) FAIL, with patched
function, the testcase PASSes without problems.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>

Uros.

Attachment: libc-alpha.diff.txt
Description: Text document

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