version 1.4, 1994/06/01 10:02:22
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version 1.13, 1995/02/06 18:14:33
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\ 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 ( -- ) |
' align Alias sfalign |
here dup faligned swap |
' aligned Alias sfaligned |
?DO bl c, LOOP ; |
[ELSE] |
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: sfloats 2* 2* ; |
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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 2* 2* 2* ; |
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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 |
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: fconstant ( r -- ) |
: fconstant ( r -- ) |
falign here f, Create A, |
Create f, |
DOES> @ f@ ; |
DOES> f@ ; |
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: fvariable |
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falign here 0. d>f f, AConstant ; |
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: fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; |
: fdepth ( -- n ) f0 @ fp@ - [ 1 floats ] Literal / ; |
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: FLit ( -- r ) r> faligned dup f@ float+ >r ; |
: FLit ( -- r ) r> faligned dup f@ float+ >r ; |
: FLiteral ( r -- ) postpone FLit falign f, ; immediate |
: FLiteral ( r -- ) postpone FLit falign f, ; immediate |
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&16 Value precision |
&15 Value precision |
: set-precision to precision ; |
: set-precision to precision ; |
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: scratch ( r -- addr len ) |
: scratch ( r -- addr len ) |
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scratch over c@ emit '. emit 1 /string type |
scratch over c@ emit '. emit 1 /string type |
'E emit . ; |
'E emit . ; |
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: fnumber ( string -- r / ) |
: sfnumber ( c-addr u -- r / ) |
?dup IF dup count >float 0= |
2dup >float |
IF defers notfound |
IF |
ELSE drop state @ |
2drop state @ |
IF postpone FLiteral THEN THEN THEN ; |
IF |
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postpone FLiteral |
' fnumber IS notfound |
THEN |
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ELSE |
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defers notfound |
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THEN ; |
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' sfnumber IS notfound |
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: fvariable ( -- ) |
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Create 0e0 f, ; |
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\ does> ( -- f-addr ) |
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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/ .5e0 f* ; |
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: 1/f 1e0 fswap f/ ; |
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\ We now have primitives for these, so we need not define them |
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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 ; |
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: f~ ( f1 f2 f3 -- flag ) fdup f0= IF fdrop f= EXIT THEN |
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fdup f0> IF frot frot f- fabs fswap |
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ELSE fnegate frot frot fover fabs fover fabs f+ frot frot |
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f- fabs frot frot f* THEN f< ; |
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: f.s ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0 |
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?DO dup i - 1- floats fp@ + f@ f. LOOP drop ; |