FLOAT_INDEX      2712 src/alloc.c      GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr)))
FLOAT_INDEX      2715 src/alloc.c      SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr)))
FLOAT_INDEX      2718 src/alloc.c      UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr)))