version 1.2, 1994/05/07 14:55:49
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version 1.5, 1994/06/17 12:34:59
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\ High level floating point 14jan94py |
\ High level floating point 14jan94py |
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: faligned ( addr -- f-addr ) |
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[ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; |
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: falign ( -- ) |
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here dup aligned swap |
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?DO bl c, LOOP ; |
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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 |
\ !! 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 ; |
IF '0 emit |
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: f. ( r -- ) f$ dup >r 0< |
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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> . ; |
: fnumber ( string -- r / ) |
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?dup IF dup count >float 0= |
: fnumber ( string -- r / ) dup count >float 0= |
IF defers notfound |
IF defers notfound ELSE drop THEN ; |
ELSE drop state @ |
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IF postpone FLiteral THEN THEN THEN ; |
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' fnumber IS notfound |
' fnumber IS notfound |
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