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| 1 : | anton | 1.1 | \ High level floating point 14jan94py |
| 2 : | |||
| 3 : | pazsan | 1.6 | 1 cells 4 = [IF] |
| 4 : | ' cells Alias sfloats | ||
| 5 : | ' cell+ Alias sfloat+ | ||
| 6 : | ' align Alias sfalign | ||
| 7 : | ' aligned Alias sfaligned | ||
| 8 : | [ELSE] | ||
| 9 : | pazsan | 1.8 | : sfloats 2* 2* ; |
| 10 : | pazsan | 1.6 | : sfloat+ 4 + ; |
| 11 : | : sfaligned ( addr -- addr' ) 3 + -4 and ; | ||
| 12 : | : sfalign ( -- ) here dup sfaligned swap ?DO bl c, LOOP ; | ||
| 13 : | [THEN] | ||
| 14 : | |||
| 15 : | 1 floats 8 = [IF] | ||
| 16 : | ' floats Alias dfloats | ||
| 17 : | ' float+ Alias dfloat+ | ||
| 18 : | ' falign Alias dfalign | ||
| 19 : | ' faligned Alias dfaligned | ||
| 20 : | [ELSE] | ||
| 21 : | pazsan | 1.8 | : dfloats 2* 2* 2* ; |
| 22 : | pazsan | 1.6 | : dfloat+ 8 + ; |
| 23 : | : dfaligned ( addr -- addr' ) 7 + -8 and ; | ||
| 24 : | : dfalign ( -- ) here dup dfaligned swap ?DO bl c, LOOP ; | ||
| 25 : | [THEN] | ||
| 26 : | |||
| 27 : | anton | 1.1 | : f, ( f -- ) here 1 floats allot f! ; |
| 28 : | |||
| 29 : | : fconstant ( r -- ) | ||
| 30 : | anton | 1.13 | Create f, |
| 31 : | DOES> f@ ; | ||
| 32 : | anton | 1.1 | |
| 33 : | : fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; | ||
| 34 : | |||
| 35 : | pazsan | 1.14 | : FLit ( -- r ) r> dup f@ float+ >r ; |
| 36 : | : FLiteral ( r -- ) | ||
| 37 : | BEGIN here cell+ dup faligned <> WHILE postpone noop REPEAT | ||
| 38 : | postpone FLit f, ; immediate | ||
| 39 : | anton | 1.1 | |
| 40 : | anton | 1.13 | &15 Value precision |
| 41 : | anton | 1.1 | : set-precision to precision ; |
| 42 : | |||
| 43 : | : scratch ( r -- addr len ) | ||
| 44 : | pad precision - precision ; | ||
| 45 : | |||
| 46 : | : zeros ( n -- ) 0 max 0 ?DO '0 emit LOOP ; | ||
| 47 : | |||
| 48 : | : -zeros ( addr u -- addr' u' ) | ||
| 49 : | BEGIN dup WHILE 1- 2dup + c@ '0 <> UNTIL 1+ THEN ; | ||
| 50 : | |||
| 51 : | pazsan | 1.4 | : f$ ( f -- n ) scratch represent 0= |
| 52 : | IF 2drop scratch 3 min type rdrop EXIT THEN | ||
| 53 : | IF '- emit THEN ; | ||
| 54 : | |||
| 55 : | : f. ( r -- ) f$ dup >r 0< | ||
| 56 : | IF '0 emit | ||
| 57 : | anton | 1.1 | ELSE scratch r@ min type r@ precision - zeros THEN |
| 58 : | '. emit r@ negate zeros | ||
| 59 : | scratch r> 0 max /string 0 max -zeros type space ; | ||
| 60 : | benschop | 1.3 | \ I'm afraid this does not really implement ansi semantics wrt precision. |
| 61 : | \ Shouldn't precision indicate the number of places shown after the point? | ||
| 62 : | anton | 1.1 | |
| 63 : | pazsan | 1.4 | : fe. ( r -- ) f$ 1- s>d 3 fm/mod 3 * >r 1+ >r |
| 64 : | anton | 1.1 | scratch r@ min type '. emit scratch r> /string type |
| 65 : | 'E emit r> . ; | ||
| 66 : | |||
| 67 : | pazsan | 1.4 | : fs. ( r -- ) f$ 1- |
| 68 : | scratch over c@ emit '. emit 1 /string type | ||
| 69 : | 'E emit . ; | ||
| 70 : | |||
| 71 : | anton | 1.7 | : sfnumber ( c-addr u -- r / ) |
| 72 : | 2dup >float | ||
| 73 : | IF | ||
| 74 : | 2drop state @ | ||
| 75 : | IF | ||
| 76 : | postpone FLiteral | ||
| 77 : | THEN | ||
| 78 : | ELSE | ||
| 79 : | defers notfound | ||
| 80 : | THEN ; | ||
| 81 : | anton | 1.1 | |
| 82 : | anton | 1.7 | ' sfnumber IS notfound |
| 83 : | anton | 1.13 | |
| 84 : | : fvariable ( -- ) | ||
| 85 : | Create 0e0 f, ; | ||
| 86 : | \ does> ( -- f-addr ) | ||
| 87 : | anton | 1.1 | |
| 88 : | 1e0 fasin 2e0 f* fconstant pi | ||
| 89 : | pazsan | 1.6 | |
| 90 : | : f2* 2e0 f* ; | ||
| 91 : | pazsan | 1.12 | : f2/ .5e0 f* ; |
| 92 : | pazsan | 1.6 | : 1/f 1e0 fswap f/ ; |
| 93 : | |||
| 94 : | |||
| 95 : | anton | 1.10 | \ We now have primitives for these, so we need not define them |
| 96 : | pazsan | 1.6 | |
| 97 : | anton | 1.10 | \ : falog ( f -- 10^f ) [ 10e0 fln ] FLiteral f* fexp ; |
| 98 : | |||
| 99 : | \ : fsinh fexpm1 fdup fdup 1e0 f+ f/ f+ f2/ ; | ||
| 100 : | \ : fcosh fexp fdup 1/f f+ f2/ ; | ||
| 101 : | \ : ftanh f2* fexpm1 fdup 2e0 f+ f/ ; | ||
| 102 : | |||
| 103 : | \ : fatanh fdup f0< >r fabs 1e0 fover f- f/ f2* flnp1 f2/ | ||
| 104 : | \ r> IF fnegate THEN ; | ||
| 105 : | \ : facosh fdup fdup f* 1e0 f- fsqrt f+ fln ; | ||
| 106 : | \ : fasinh fdup fdup f* 1e0 f+ fsqrt f/ fatanh ; | ||
| 107 : | pazsan | 1.9 | |
| 108 : | pazsan | 1.11 | : f~ ( f1 f2 f3 -- flag ) fdup f0= IF fdrop f= EXIT THEN |
| 109 : | fdup f0> IF frot frot f- fabs fswap | ||
| 110 : | ELSE fnegate frot frot fover fabs fover fabs f+ frot frot | ||
| 111 : | f- fabs frot frot f* THEN f< ; | ||
| 112 : | |||
| 113 : | pazsan | 1.9 | : f.s ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0 |
| 114 : | ?DO dup i - 1- floats fp@ + f@ f. LOOP drop ; |
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