a0_hi
a0_hi = 8.8560319441088875e-1,
a0_hi = 8.8560319441088875e-01, /* 0x3fec56dc, 0x82a74aef */
r.a = (float)(thi + a0_hi);
r.b = ((a0_hi - r.a) + thi) + tlo;
r.a = (float)(thi + a0_hi);
r.b = ((a0_hi - r.a) + thi) + tlo;