version 1.57, 2010/03/22 17:08:06
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version 1.68, 2012/12/31 15:25:18
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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) 1995,1997,2003,2004,2005,2006,2007,2009,2010,2011,2012 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= |
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IF |
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2drop 2dup [CHAR] E scan ( c-addr u c-addr3 u3 ) |
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THEN |
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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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Create si-prefixes ," PTGMk munpf" |
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si-prefixes count bl scan drop Constant zero-exp |
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: prefix-number ( c-addr u -- r true | false ) |
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si-prefixes count bounds DO |
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2dup I c@ scan nip dup 0<> IF |
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1 = IF 1- fp-char @ ELSE I c@ THEN |
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>float1 |
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dup IF 1000 s>f zero-exp I - s>f f** f* THEN |
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UNLOOP EXIT THEN drop |
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LOOP |
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sfnumber ; |
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[ELSE] |
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: sfnumber ( c-addr u -- r true | false ) |
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>float ; |
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: prefix-number sfnumber ; |
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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 prefix-number |
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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 202 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, ; |