gistfile1.txt

static nir_ssa_def *
build_round(nir_builder *nb, nir_ssa_def *src)
{
   nir_ssa_def *half = nir_imm_floatN_t(nb, 0.5, src->bit_size);
   nir_ssa_def *truncated = nir_ftrunc(nb, src);
   nir_ssa_def *remainder = nir_fsub(nb, src, truncated);

   return nir_bcsel(nb, nir_fge(nb, nir_fabs(nb, remainder), half),
                    nir_fadd(nb, truncated, nir_fsign(nb, src)), truncated);
}