| \ High level floating point 14jan94py |
\ High level floating point 14jan94py |
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| 1 cells 4 = [IF] |
\ Copyright (C) 1995 Free Software Foundation, Inc. |
| ' cells Alias sfloats |
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| ' cell+ Alias sfloat+ |
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| ' align Alias sfalign |
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| ' aligned Alias sfaligned |
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| [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! ; |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation; either version 2 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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|
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\ You should have received a copy of the GNU General Public License |
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\ along with this program; if not, write to the Free Software |
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\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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|
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\ 1 cells 4 = [IF] |
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\ ' cells Alias sfloats |
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\ ' cell+ Alias sfloat+ |
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\ ' align Alias sfalign |
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\ ' aligned Alias sfaligned |
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\ [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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: sfalign ( -- ) \ float-ext s-f-align |
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here dup sfaligned swap ?DO bl c, LOOP ; |
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: dfalign ( -- ) \ float-ext d-f-align |
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here dup dfaligned swap ?DO bl c, LOOP ; |
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| \ !! have create produce faligned pfas |
1 sfloats constant sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus |
| : fconstant ( r -- ) |
dofield: lastxt code-address! \ change the constant into a field |
| falign here f, Create A, |
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| DOES> @ f@ ; |
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| : fvariable |
1 dfloats constant dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus |
| falign here 0. d>f f, AConstant ; |
dofield: lastxt code-address! \ change the constant into a field |
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: f, ( f -- ) here 1 floats allot f! ; |
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: fconstant ( r -- ) \ float |
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Create f, |
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DOES> ( -- r ) |
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f@ ; |
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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> dup f@ float+ >r ; |
| : FLiteral ( r -- ) postpone FLit falign f, ; immediate |
: FLiteral ( r -- ) |
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BEGIN here cell+ dup faligned <> WHILE postpone noop REPEAT |
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postpone FLit 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 ) |
| scratch over c@ emit '. emit 1 /string type |
scratch over c@ emit '. emit 1 /string type |
| 'E emit . ; |
'E emit . ; |
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require debugging.fs |
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| : sfnumber ( c-addr u -- r / ) |
: sfnumber ( c-addr u -- r / ) |
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2dup [CHAR] e scan |
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dup 0= |
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IF |
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2drop 2dup [CHAR] E scan |
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THEN |
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nip |
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IF |
| 2dup >float |
2dup >float |
| IF |
IF |
| 2drop state @ |
2drop state @ |
| IF |
IF |
| postpone FLiteral |
POSTPONE FLiteral |
| THEN |
THEN |
| ELSE |
EXIT |
| defers notfound |
THEN |
| THEN ; |
THEN |
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defers notfound ; |
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| ' sfnumber IS notfound |
' sfnumber IS notfound |
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| 1e0 fasin 2e0 f* fconstant pi |
: fvariable ( -- ) |
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Create 0.0E0 f, ; |
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\ does> ( -- f-addr ) |
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1.0e0 fasin 2.0e0 f* fconstant pi |
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: f2* 2.0e0 f* ; |
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: f2/ 0.5e0 f* ; |
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: 1/f 1.0e0 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 ) [ 10.0e0 fln ] FLiteral f* fexp ; |
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\ : fsinh fexpm1 fdup fdup 1.0e0 f+ f/ f+ f2/ ; |
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\ : fcosh fexp fdup 1/f f+ f2/ ; |
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\ : ftanh f2* fexpm1 fdup 2.0e0 f+ f/ ; |
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\ : fatanh fdup f0< >r fabs 1.0e0 fover f- f/ f2* flnp1 f2/ |
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\ r> IF fnegate THEN ; |
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\ : facosh fdup fdup f* 1.0e0 f- fsqrt f+ fln ; |
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\ : fasinh fdup fdup f* 1.0e0 f+ fsqrt f/ fatanh ; |
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\ !! factor out parts |
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: f~ ( f1 f2 f3 -- flag ) \ float-ext |
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fdup f0= |
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IF |
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fdrop f= EXIT |
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THEN |
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fdup f0> |
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IF |
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frot frot f- fabs fswap |
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ELSE |
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fnegate frot frot fover fabs fover fabs f+ frot frot |
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f- fabs frot frot f* |
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THEN |
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f< ; |
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| : f2* 2e0 f* ; |
: f.s ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0 |
| : f2/ 2e0 f/ ; |
?DO dup i - 1- floats fp@ + f@ f. LOOP drop ; |
| : 1/f 1e0 fswap f/ ; |
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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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