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| 1 : | anton | 1.1 | \ High level floating point 14jan94py |
| 2 : | |||
| 3 : | : faligned ( addr -- f-addr ) | ||
| 4 : | [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; | ||
| 5 : | |||
| 6 : | anton | 1.2 | : falign ( -- ) |
| 7 : | here dup aligned swap | ||
| 8 : | anton | 1.1 | ?DO bl c, LOOP ; |
| 9 : | |||
| 10 : | : f, ( f -- ) here 1 floats allot f! ; | ||
| 11 : | |||
| 12 : | anton | 1.2 | \ !! have create produce faligned pfas |
| 13 : | anton | 1.1 | : fconstant ( r -- ) |
| 14 : | Create falign f, | ||
| 15 : | DOES> faligned f@ ; | ||
| 16 : | |||
| 17 : | : fvariable | ||
| 18 : | Create falign 0 f, | ||
| 19 : | DOES> faligned ; | ||
| 20 : | |||
| 21 : | : fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; | ||
| 22 : | |||
| 23 : | : FLit ( -- r ) r> faligned dup f@ float+ >r ; | ||
| 24 : | : FLiteral ( r -- ) postpone FLit falign f, ; immediate | ||
| 25 : | |||
| 26 : | &16 Value precision | ||
| 27 : | : set-precision to precision ; | ||
| 28 : | |||
| 29 : | : scratch ( r -- addr len ) | ||
| 30 : | pad precision - precision ; | ||
| 31 : | |||
| 32 : | : zeros ( n -- ) 0 max 0 ?DO '0 emit LOOP ; | ||
| 33 : | |||
| 34 : | : -zeros ( addr u -- addr' u' ) | ||
| 35 : | BEGIN dup WHILE 1- 2dup + c@ '0 <> UNTIL 1+ THEN ; | ||
| 36 : | |||
| 37 : | : f. ( r -- ) scratch represent 0= | ||
| 38 : | IF 2drop scratch 3 min type EXIT THEN | ||
| 39 : | IF '- emit THEN dup >r 0< | ||
| 40 : | IF '0 emit | ||
| 41 : | ELSE scratch r@ min type r@ precision - zeros THEN | ||
| 42 : | '. emit r@ negate zeros | ||
| 43 : | scratch r> 0 max /string 0 max -zeros type space ; | ||
| 44 : | |||
| 45 : | : fe. ( r -- ) scratch represent 0= | ||
| 46 : | IF 2drop scratch 3 min type EXIT THEN | ||
| 47 : | IF '- emit THEN 1- s>d 3 fm/mod 3 * >r 1+ >r | ||
| 48 : | scratch r@ min type '. emit scratch r> /string type | ||
| 49 : | 'E emit r> . ; | ||
| 50 : | |||
| 51 : | : fs. ( r -- ) scratch represent 0= | ||
| 52 : | IF 2drop scratch 3 min type EXIT THEN | ||
| 53 : | IF '- emit THEN 1- >r | ||
| 54 : | scratch 1 min type '. emit scratch 1 /string type | ||
| 55 : | 'E emit r> . ; | ||
| 56 : | |||
| 57 : | : fnumber ( string -- r / ) dup count >float 0= | ||
| 58 : | IF defers notfound ELSE drop THEN ; | ||
| 59 : | |||
| 60 : | ' fnumber IS notfound | ||
| 61 : | |||
| 62 : | 1e0 fasin 2e0 f* fconstant pi |
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