| \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 constant sfloat+ ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus |
1 sfloats (Field) sfloat+ , ( sf-addr1 -- sf-addr2 ) \ float-ext s-float-plus |
| \G Increment @i{sf-addr1} by the number of address units corresponding to the size of |
\G Increment @i{sf-addr1} by the number of address units corresponding to the size of |
| \G a single-precision IEEE floating-point number, to give @i{sf-addr2}."" |
\G a single-precision IEEE floating-point number, to give @i{sf-addr2}."" |
| dofield: lastxt code-address! \ change the constant into a field |
|
| |
|
| 1 dfloats constant dfloat+ ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus |
1 dfloats (Field) dfloat+ , ( df-addr1 -- df-addr2 ) \ float-ext d-float-plus |
| \G Increment @i{df-addr1} by the number of address units corresponding to the size of |
\G Increment @i{df-addr1} by the number of address units corresponding to the size of |
| \G a double-precision IEEE floating-point number, to give @i{df-addr2}."" |
\G a double-precision IEEE floating-point number, to give @i{df-addr2}."" |
| dofield: lastxt code-address! \ change the constant into a field |
|
| |
|
| : 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 |
| f- fabs frot frot f* f< ; |
f- fabs frot frot f* f< ; |
| |
|
| : f~ ( r1 r2 r3 -- flag ) \ float-ext f-proximate |
: f~ ( r1 r2 r3 -- flag ) \ float-ext f-proximate |
| \G ANS Forth medley: r3>0: @code{f~abs}; r3=0: r1=r2; r3<0: @code{fnegate f~abs}. |
\G ANS Forth medley: r3>0: @code{f~abs}; r3=0: r1=r2; r3<0: @code{fnegate f~rel}. |
| fdup f0= |
fdup f0= |
| IF |
IF |
| fdrop f= \ !! this does not work, because 0=-0 with f= on Linux-Intel |
fdrop f= \ !! this does not work, because 0=-0 with f= on Linux-Intel |
