### Diff for /gforth/float.fs between versions 1.15 and 1.17

version 1.15, 1995/08/27 19:56:29 version 1.17, 1995/10/16 18:33:08
Line 1 Line 1
\ High level floating point                            14jan94py  \ High level floating point                            14jan94py

1 cells 4 = [IF]  \ 1 cells 4 = [IF]
' cells   Alias sfloats  \ ' cells   Alias sfloats
' cell+   Alias sfloat+  \ ' cell+   Alias sfloat+
' align   Alias sfalign  \ ' align   Alias sfalign
' aligned Alias sfaligned  \ ' aligned Alias sfaligned
[ELSE]  \ [ELSE]
: sfloats  2* 2* ;  \ : sfloats  2* 2* ;
: sfloat+  4 + ;  \ : sfloat+  4 + ;
: sfaligned ( addr -- addr' )  3 + -4 and ;  \ : sfaligned ( addr -- addr' )  3 + -4 and ;
: sfalign ( -- )  here dup sfaligned swap ?DO  bl c,  LOOP ;  \ : sfalign ( -- )  here dup sfaligned swap ?DO  bl c,  LOOP ;
[THEN]  \ [THEN]

1 floats 8 = [IF]  \ 1 floats 8 = [IF]
' floats   Alias dfloats  \ ' floats   Alias dfloats
' float+   Alias dfloat+  \ ' float+   Alias dfloat+
' falign   Alias dfalign  \ ' falign   Alias dfalign
' faligned Alias dfaligned  \ ' faligned Alias dfaligned
[ELSE]  \ [ELSE]
: dfloats  2* 2* 2* ;  \ : dfloats  2* 2* 2* ;
: dfloat+  8 + ;  \ : dfloat+  8 + ;
: dfaligned ( addr -- addr' )  7 + -8 and ;  \ : dfaligned ( addr -- addr' )  7 + -8 and ;
: dfalign ( -- )  here dup dfaligned swap ?DO  bl c,  LOOP ;  \ : dfalign ( -- )  here dup dfaligned swap ?DO  bl c,  LOOP ;
[THEN]  \ [THEN]

: sfalign ( -- ) \ float-ext s-f-align
here dup sfaligned swap ?DO  bl c,  LOOP ;
: dfalign ( -- ) \ float-ext d-f-align
here dup dfaligned swap ?DO  bl c,  LOOP ;

1 sfloats constant sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus
dofield: lastxt code-address! \ change the constant into a field

1 dfloats constant dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus
dofield: lastxt code-address! \ change the constant into a field

: f, ( f -- )  here 1 floats allot f! ;  : f, ( f -- )  here 1 floats allot f! ;

: fconstant  ( r -- )  : fconstant  ( r -- ) \ float
Create f,      Create f,
DOES> f@ ;  DOES> ( -- r )
f@ ;

: fdepth  ( -- n )  f0 @ fp@ - [ 1 floats ] Literal / ;  : fdepth  ( -- n )  f0 @ fp@ - [ 1 floats ] Literal / ;

Line 68 Line 80
scratch over c@ emit '. emit 1 /string type    scratch over c@ emit '. emit 1 /string type
'E emit . ;    'E emit . ;

require debugging.fs

: sfnumber ( c-addr u -- r / )  : sfnumber ( c-addr u -- r / )
2dup >float      2dup [CHAR] e scan
dup 0=
IF
2drop 2dup [CHAR] E scan
THEN
nip
IF      IF
2drop state @          2dup >float
IF          IF
postpone FLiteral              2drop state @
IF
POSTPONE FLiteral
THEN
EXIT
THEN          THEN
ELSE      THEN
defers notfound      defers notfound ;
THEN ;

' sfnumber IS notfound  ' sfnumber IS notfound

Line 105 Line 127
\ : facosh   fdup fdup f* 1.0e0 f- fsqrt f+ fln ;  \ : facosh   fdup fdup f* 1.0e0 f- fsqrt f+ fln ;
\ : fasinh   fdup fdup f* 1.0e0 f+ fsqrt f/ fatanh ;  \ : fasinh   fdup fdup f* 1.0e0 f+ fsqrt f/ fatanh ;

: f~ ( f1 f2 f3 -- flag )  fdup f0= IF  fdrop f= EXIT  THEN  \ !! factor out parts
fdup f0>   IF  frot frot f- fabs fswap  : f~ ( f1 f2 f3 -- flag ) \ float-ext
ELSE  fnegate frot frot fover fabs fover fabs f+ frot frot      fdup f0=
f- fabs frot frot f*  THEN  f< ;      IF
fdrop f= EXIT
THEN
fdup f0>
IF
frot frot f- fabs fswap
ELSE
fnegate frot frot fover fabs fover fabs f+ frot frot
f- fabs frot frot f*
THEN
f< ;

: f.s  ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0   : f.s  ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0
?DO  dup i - 1- floats fp@ + f@ f.  LOOP  drop ;     ?DO  dup i - 1- floats fp@ + f@ f.  LOOP  drop ;

 Removed from v.1.15 changed lines Added in v.1.17

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