version 1.46, 2004/12/31 13:23:57
|
version 1.54, 2009/05/24 17:36:36
|
Line 1
|
Line 1
|
\ High level floating point 14jan94py |
\ High level floating point 14jan94py |
|
|
\ Copyright (C) 1995,1997,2003,2004 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
\ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
\ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
\ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
\ of the License, or (at your option) any later version. |
\ of the License, or (at your option) any later version. |
|
|
\ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
Line 15
|
Line 15
|
\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
|
|
\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
|
|
|
\ 1 cells 4 = [IF] |
\ 1 cells 4 = [IF] |
\ ' cells Alias sfloats |
\ ' cells Alias sfloats |
Line 51
|
Line 50
|
\G enough space to align it. |
\G enough space to align it. |
here dup dfaligned swap ?DO bl c, LOOP ; |
here dup dfaligned swap ?DO bl c, LOOP ; |
|
|
1 sfloats (Field) sfloat+ , ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus |
(Field) sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus |
\G @code{1 sfloats +}. |
\G @code{1 sfloats +}. |
|
1 sfloats , |
|
|
1 dfloats (Field) dfloat+ , ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus |
(Field) dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus |
\G @code{1 dfloats +}. |
\G @code{1 dfloats +}. |
|
1 dfloats , |
|
|
: f, ( f -- ) \ gforth |
: f, ( f -- ) \ gforth |
\G Reserve data space for one floating-point number and store |
\G Reserve data space for one floating-point number and store |
\G @i{f} in the space. |
\G @i{f} in the space. |
Line 127 DOES> ( -- r )
|
Line 128 DOES> ( -- r )
|
scratch over c@ emit '. emit 1 /string type |
scratch over c@ emit '. emit 1 /string type |
'E emit . ; |
'E emit . ; |
|
|
require debugs.fs |
|
|
|
: sfnumber ( c-addr u -- r true | false ) |
: sfnumber ( c-addr u -- r true | false ) |
2dup [CHAR] e scan ( c-addr u c-addr2 u2 ) |
2dup [CHAR] e scan ( c-addr u c-addr2 u2 ) |
dup 0= |
dup 0= |
Line 142 require debugs.fs
|
Line 141 require debugs.fs
|
2drop false |
2drop false |
THEN ; |
THEN ; |
|
|
:noname ( c-addr u -- ) |
[ifundef] compiler-notfound1 |
|
defer compiler-notfound1 |
|
' no.extensions IS compiler-notfound1 |
|
|
|
:noname compiler-notfound1 execute ; is compiler-notfound |
|
|
|
defer interpreter-notfound1 |
|
' no.extensions IS interpreter-notfound1 |
|
|
|
:noname interpreter-notfound1 execute ; is interpreter-notfound |
|
[then] |
|
|
|
:noname ( c-addr u -- ... xt ) |
2dup sfnumber |
2dup sfnumber |
IF |
IF |
2drop POSTPONE FLiteral |
2drop [comp'] FLiteral |
ELSE |
ELSE |
defers compiler-notfound |
defers compiler-notfound1 |
ENDIF ; |
ENDIF ; |
IS compiler-notfound |
IS compiler-notfound1 |
|
|
:noname ( c-addr u -- r ) |
:noname ( c-addr u -- ... xt ) |
2dup sfnumber |
2dup sfnumber |
IF |
IF |
2drop |
2drop ['] noop |
ELSE |
ELSE |
defers interpreter-notfound |
defers interpreter-notfound1 |
ENDIF ; |
ENDIF ; |
IS interpreter-notfound |
IS interpreter-notfound1 |
|
|
: fvariable ( "name" -- ) \ float f-variable |
: fvariable ( "name" -- ) \ float f-variable |
Create 0.0E0 f, ; |
Create 0.0E0 f, ; |
Line 222 set-current
|
Line 233 set-current
|
fnegate f~rel |
fnegate f~rel |
THEN ; |
THEN ; |
|
|
|
-0e fp@ c@ $80 = [if] 0 [else] 7 [endif] constant fsign-offset |
|
|
|
: fcopysign ( r1 r2 -- r3 ) \ gforth |
|
\G r3 takes its absolute value from r1 and its sign from r2 |
|
\ !! implementation relies on IEEE DP format |
|
fp@ dup fsign-offset + dup c@ $80 and >r ( r1 r2 addr-r1sign ) |
|
float + dup c@ $7f and r> or swap c! |
|
fdrop ; |
|
|
\ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com> |
\ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com> |
\ not sure if they are a good idea |
\ not sure if they are a good idea |
|
|
: FTRUNC ( r1 -- r2 ) |
: ftrunc ( r1 -- r2 ) \ X:ftrunc |
\ round towards 0 |
\ round towards 0 |
\ !! should be implemented properly |
fdup fabs floor fswap fcopysign ; |
F>D D>F ; |
|
|
|
: FMOD ( r1 r2 -- r ) |
: FMOD ( r1 r2 -- r ) |
\ remainder of r1/r2 |
\ remainder of r1/r2 |
FOVER FOVER F/ ftrunc F* F- ; |
FOVER FOVER F/ ftrunc F* F- ; |
|
|