| \ High level floating point 14jan94py |
\ High level floating point 14jan94py |
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| : faligned ( addr -- f-addr ) |
1 cells 4 = [IF] |
| [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; |
' cells Alias sfloats |
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' cell+ Alias sfloat+ |
| : falign ( -- ) here dup aligned swap |
' align Alias sfalign |
| ?DO bl c, LOOP ; |
' aligned Alias sfaligned |
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[ELSE] |
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: sfloats 4 * ; |
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: sfloat+ 4 + ; |
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: sfaligned ( addr -- addr' ) 3 + -4 and ; |
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: sfalign ( -- ) here dup sfaligned swap ?DO bl c, LOOP ; |
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[THEN] |
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1 floats 8 = [IF] |
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' floats Alias dfloats |
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' float+ Alias dfloat+ |
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' falign Alias dfalign |
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' faligned Alias dfaligned |
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[ELSE] |
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: dfloats 8 * ; |
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: dfloat+ 8 + ; |
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: dfaligned ( addr -- addr' ) 7 + -8 and ; |
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: dfalign ( -- ) here dup dfaligned swap ?DO bl c, LOOP ; |
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[THEN] |
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| : f, ( f -- ) here 1 floats allot f! ; |
: f, ( f -- ) here 1 floats allot f! ; |
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\ !! have create produce faligned pfas |
| : fconstant ( r -- ) |
: fconstant ( r -- ) |
| Create falign f, |
falign here f, Create A, |
| DOES> faligned f@ ; |
DOES> @ f@ ; |
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| : fvariable |
: fvariable |
| Create falign 0 f, |
falign here 0. d>f f, AConstant ; |
| DOES> faligned ; |
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| : fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; |
: fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; |
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| : -zeros ( addr u -- addr' u' ) |
: -zeros ( addr u -- addr' u' ) |
| BEGIN dup WHILE 1- 2dup + c@ '0 <> UNTIL 1+ THEN ; |
BEGIN dup WHILE 1- 2dup + c@ '0 <> UNTIL 1+ THEN ; |
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| : f. ( r -- ) scratch represent 0= |
: f$ ( f -- n ) scratch represent 0= |
| IF 2drop scratch 3 min type EXIT THEN |
IF 2drop scratch 3 min type rdrop EXIT THEN |
| IF '- emit THEN dup >r 0< |
IF '- emit THEN ; |
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: f. ( r -- ) f$ dup >r 0< |
| IF '0 emit |
IF '0 emit |
| ELSE scratch r@ min type r@ precision - zeros THEN |
ELSE scratch r@ min type r@ precision - zeros THEN |
| '. emit r@ negate zeros |
'. emit r@ negate zeros |
| scratch r> 0 max /string 0 max -zeros type space ; |
scratch r> 0 max /string 0 max -zeros type space ; |
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\ I'm afraid this does not really implement ansi semantics wrt precision. |
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\ Shouldn't precision indicate the number of places shown after the point? |
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| : fe. ( r -- ) scratch represent 0= |
: fe. ( r -- ) f$ 1- s>d 3 fm/mod 3 * >r 1+ >r |
| IF 2drop scratch 3 min type EXIT THEN |
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| IF '- emit THEN 1- s>d 3 fm/mod 3 * >r 1+ >r |
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| scratch r@ min type '. emit scratch r> /string type |
scratch r@ min type '. emit scratch r> /string type |
| 'E emit r> . ; |
'E emit r> . ; |
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| : fs. ( r -- ) scratch represent 0= |
: fs. ( r -- ) f$ 1- |
| IF 2drop scratch 3 min type EXIT THEN |
scratch over c@ emit '. emit 1 /string type |
| IF '- emit THEN 1- >r |
'E emit . ; |
| scratch 1 min type '. emit scratch 1 /string type |
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| 'E emit r> . ; |
: sfnumber ( c-addr u -- r / ) |
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2dup >float |
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IF |
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2drop state @ |
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IF |
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postpone FLiteral |
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THEN |
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ELSE |
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defers notfound |
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THEN ; |
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| : fnumber ( string -- r / ) dup count >float 0= |
' sfnumber IS notfound |
| IF defers notfound ELSE drop THEN ; |
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| ' fnumber IS notfound |
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| 1e0 fasin 2e0 f* fconstant pi |
1e0 fasin 2e0 f* fconstant pi |
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: f2* 2e0 f* ; |
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: f2/ 2e0 f/ ; |
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: 1/f 1e0 fswap f/ ; |
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: falog ( f -- 10^f ) [ 10e0 fln ] FLiteral f* fexp ; |
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: fsinh fexpm1 fdup fdup 1e0 f+ f/ f+ f2/ ; |
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: fcosh fexp fdup 1/f f+ f2/ ; |
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: ftanh f2* fexpm1 fdup 2e0 f+ f/ ; |
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: fatanh fdup f0< >r fabs 1e0 fover f- f/ f2* flnp1 f2/ |
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r> IF fnegate THEN ; |
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: facosh fdup fdup f* 1e0 f- fsqrt f+ fln ; |
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: fasinh fdup fdup f* 1e0 f+ fsqrt f/ fatanh ; |
