ComparableVersion sp1 = new ComparableVersion("1.0-sp1-redhat");
        ComparableVersion sp2 = new ComparableVersion("1.0-sp-1-redhat");
        ComparableVersion sp3 = new ComparableVersion("1.0-sp.1-redhat");
        assertTrue(f.compareTo(sp1) < 0, "expected " + f + " < " + sp1);
        assertTrue(f.compareTo(sp2) < 0, "expected " + f + " < " + sp2);
        assertTrue(f.compareTo(sp3) < 0, "expected " + f + " < " + sp3);
    }

            work = right ^ keys[keysi++];
            fval |= SP8[work & 0x0000003f];
            fval |= SP6[work >>> 8 & 0x0000003f];
            fval |= SP4[work >>> 16 & 0x0000003f];
            fval |= SP2[work >>> 24 & 0x0000003f];
            leftt ^= fval;
            work = leftt << 28 | leftt >>> 4;
            work ^= keys[keysi++];
            fval = SP7[work & 0x0000003f];

					sp = sp[1:]
				}
				if len(sp) > 0 {
					sa.IsExtended()[0] = 1
				}
				return sp
			}
			sp2 := formatSPD(spd, blk.GNU().Sparse())
			for len(sp2) > 0 {
				var spHdr block
				sp2 = formatSPD(sp2, spHdr.Sparse())
				spb = append(spb, spHdr[:]...)
			}

			// Update size fields in the header block.
			realSize := hdr.Size