test float fails on sqrt only when in all mode

Created by: davidharrishmc

sim-testfloat-batch-all fails on sqrt but sim-testfloat-batch sqrt passes. Seems like a testfloat test bench issue.

$ cd $WALLY/sim
$ ./sim-testfloat-batch-all
...
 Running f128_div_rnm.tv vectors
# Running f128_sqrt_rne.tv vectors
# 
# Error in f128_sqrt_rne.tv
# TestNum        105 OpCtrl x
# inputs: 00000000000000000000000000000000 4006ffbffffffffffffeffffffffffff 00000000000000000000000000000000
# SrcA: xxxxxxxxxxxxxxxx
#  Res: 00000000000000000000000000000000 00
#  Expected: 4002ffdffeffeffebfe37d57bd39374a xx
# ** Note: $stop    : ../testbench/testbench-fp.sv(961)
#    Time: 1050014245 ns  Iteration: 1  Instance: /testbenchfp
# Break in Module testbenchfp at ../testbench/testbench-fp.sv line 961
# Stopped at ../testbench/testbench-fp.sv line 961


$ ./sim-testfloat-batch sqrt
...
# Running f128_sqrt_rne.tv vectors 
# Running f128_sqrt_rz.tv vectors
...