en:pfw:dlshift_drshift
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en:pfw:dlshift_drshift [2024-04-04 23:51] – [Test results (noForth t)] albert | en:pfw:dlshift_drshift [2024-04-09 14:41] (current) – [Test results (noForth t)] albert | ||
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decimal | decimal | ||
: DLSHIFT ( lo hi n -- lo' hi' ) \ n in [0,32*2] | : DLSHIFT ( lo hi n -- lo' hi' ) \ n in [0,32*2] | ||
- | tuck lshift >r \ hi' | + | tuck lshift >r \ hi' |
- | 2dup 32 - negate rshift | + | 2dup 32 - |
- | | + | 2dup |
- | lshift | + | |
- | 2r> r> or or ; | + | lshift |
+ | 2r> r> or or ; | ||
+ | |||
: DRSHIFT ( lo hi n -- lo' hi' ) \ n in [0,32*2] | : DRSHIFT ( lo hi n -- lo' hi' ) \ n in [0,32*2] | ||
- | tuck 2dup rshift >r | + | tuck 2dup rshift >r |
- | | + | 32 - |
- | | + | 2dup |
- | rshift 2r> or or \ build lo' | + | |
- | r> ; \ hi' | + | rshift 2r> or or \ compose |
+ | r> ; \ hi' | ||
</ | </ | ||
===== Possibly a problem ===== | ===== Possibly a problem ===== | ||
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: (TEST) ( ud ud -- ) 2over 2over du.hex du.hex | : (TEST) ( ud ud -- ) 2over 2over du.hex du.hex | ||
cr ." #shifts dlshift--------- drshift---------" | cr ." #shifts dlshift--------- drshift---------" | ||
- | 32 2* 3 + -2 | + | 32 2* 2 + -2 |
do cr i 3 and 0= if cr then i 7 .r space | do cr i 3 and 0= if cr then i 7 .r space | ||
2over 2over i dlshift du.hex i drshift du.hex | 2over 2over i dlshift du.hex i drshift du.hex | ||
Line 134: | Line 136: | ||
40 0000000000000000 0000000000000000 | 40 0000000000000000 0000000000000000 | ||
- | 41 0000000000000000 0000000000000000 | + | 41 0000000000000000 0000000000000000 OK.0 |
- | 42 0000000000000000 0000000000000000 | + | |
</ | </ | ||
< | < | ||
- | |||
@)test2 0000000000000001 8000000000000000 | @)test2 0000000000000001 8000000000000000 | ||
#shifts dlshift--------- drshift--------- | #shifts dlshift--------- drshift--------- | ||
Line 225: | Line 225: | ||
40 0000000000000000 0000000000000000 | 40 0000000000000000 0000000000000000 | ||
- | | + | 41 0000000000000000 0000000000000000 |
- | | + | |
</ | </ | ||
===== Contributions ===== | ===== Contributions ===== |
en/pfw/dlshift_drshift.1712267470.txt.gz · Last modified: 2024-04-04 23:51 by albert