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