version 1.56, 2009/12/31 15:32:35
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version 1.65, 2012/05/26 10:20:01
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\ High level floating point 14jan94py |
\ High level floating point 14jan94py |
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\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007,2009 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007,2009,2010,2011 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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Line 88 DOES> ( -- r )
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Line 88 DOES> ( -- r )
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\G @code{F.} @code{FE.} and @code{FS.} to @i{u}. |
\G @code{F.} @code{FE.} and @code{FS.} to @i{u}. |
to precision ; |
to precision ; |
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: scratch ( r -- addr len ) |
: scratch ( -- addr len ) |
pad precision - precision ; |
pad precision - precision ; |
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: zeros ( n -- ) 0 max 0 ?DO '0 emit LOOP ; |
: zeros ( n -- ) 0 max 0 ?DO '0 emit LOOP ; |
Line 128 DOES> ( -- r )
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Line 128 DOES> ( -- r )
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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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[IFDEF] fp-char |
: sfnumber ( c-addr u -- r true | false ) |
: sfnumber ( c-addr u -- r true | false ) |
2dup [CHAR] e scan ( c-addr u c-addr2 u2 ) |
fp-char @ >float1 ; |
dup 0= |
[ELSE] |
IF |
: sfnumber ( c-addr u -- r true | false ) |
2drop 2dup [CHAR] E scan ( c-addr u c-addr3 u3 ) |
>float ; |
THEN |
[THEN] |
nip |
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IF |
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>float |
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ELSE |
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2drop false |
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THEN ; |
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[ifdef] recognizer: |
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[IFDEF] 2lit, |
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: flit, postpone Fliteral ; |
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:noname ['] noop ; |
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:noname ['] flit, ; |
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[ELSE] |
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' noop |
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:noname postpone Fliteral ; |
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[THEN] |
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dup |
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recognizer: r:fnumber |
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: fnum-recognizer ( addr u -- float int-table | addr u r:fail ) |
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2dup sfnumber |
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IF |
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2drop r:fnumber EXIT |
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THEN |
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r:fail ; |
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' fnum-recognizer |
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forth-recognizer get-recognizers |
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1+ forth-recognizer set-recognizers |
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[else] |
[ifundef] compiler-notfound1 |
[ifundef] compiler-notfound1 |
defer compiler-notfound1 |
defer compiler-notfound1 |
' no.extensions IS compiler-notfound1 |
' no.extensions IS compiler-notfound1 |
Line 170 IS compiler-notfound1
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Line 188 IS compiler-notfound1
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defers interpreter-notfound1 |
defers interpreter-notfound1 |
ENDIF ; |
ENDIF ; |
IS interpreter-notfound1 |
IS interpreter-notfound1 |
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[then] |
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: fvariable ( "name" -- ) \ float f-variable |
: fvariable ( "name" -- ) \ float f-variable |
Create 0.0E0 f, ; |
Create 0.0E0 f, ; |
Line 233 set-current
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Line 252 set-current
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fnegate f~rel |
fnegate f~rel |
THEN ; |
THEN ; |
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-0e fp@ c@ $80 = [if] 0 [else] 7 [endif] constant fsign-offset |
-0e 8 0 [do] fp@ [i] + c@ $80 = [if] [i] constant fsign-offset [then] [loop] |
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: fcopysign ( r1 r2 -- r3 ) \ gforth |
: fcopysign ( r1 r2 -- r3 ) \ gforth |
\G r3 takes its absolute value from r1 and its sign from r2 |
\G r3 takes its absolute value from r1 and its sign from r2 |