\ High level floating point 14jan94py : faligned ( addr -- f-addr ) [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; : falign ( -- ) here dup faligned swap ?DO bl c, LOOP ; : f, ( f -- ) here 1 floats allot f! ; \ !! have create produce faligned pfas : fconstant ( r -- ) falign here f, Create A, DOES> @ f@ ; : fvariable falign here 0. d>f f, AConstant ; : fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; : FLit ( -- r ) r> faligned dup f@ float+ >r ; : FLiteral ( r -- ) postpone FLit falign f, ; immediate &16 Value precision : set-precision to precision ; : scratch ( r -- addr len ) pad precision - precision ; : zeros ( n -- ) 0 max 0 ?DO '0 emit LOOP ; : -zeros ( addr u -- addr' u' ) BEGIN dup WHILE 1- 2dup + c@ '0 <> UNTIL 1+ THEN ; : f\$ ( f -- n ) scratch represent 0= IF 2drop scratch 3 min type rdrop EXIT THEN IF '- emit THEN ; : f. ( r -- ) f\$ dup >r 0< IF '0 emit ELSE scratch r@ min type r@ precision - zeros THEN '. emit r@ negate zeros scratch r> 0 max /string 0 max -zeros type space ; \ I'm afraid this does not really implement ansi semantics wrt precision. \ Shouldn't precision indicate the number of places shown after the point? : fe. ( r -- ) f\$ 1- s>d 3 fm/mod 3 * >r 1+ >r scratch r@ min type '. emit scratch r> /string type 'E emit r> . ; : fs. ( r -- ) f\$ 1- scratch over c@ emit '. emit 1 /string type 'E emit . ; : fnumber ( string -- r / ) ?dup IF dup count >float 0= IF defers notfound ELSE drop state @ IF postpone FLiteral THEN THEN THEN ; ' fnumber IS notfound 1e0 fasin 2e0 f* fconstant pi