FX1S Datasheet, PDF (189/480 Pages) Mitsubishi Electric Semiconductor – FX1S

ÏÐÈÊËÀÄÍÛÅ ÈÍÑÒÐÓÊÖÈÈ
ÀÐÈÔÌÅÒÈ×ÅÑÊÈÅ ÈÍÑÒÐÓÊÖÈÈ
6.4.2
ÂÛ×ÈÒÀÍÈÅ ×ÈÑËÎÂÛÕ ÄÀÍÍÛÕ (SUB, DSUB)
SUB (S1+) (S2+) (D+)
S+, S2+
K, H, KnX, KnY, KnM, KnS,
T, C, D, V, Z
D+
KnY, KnM, KnS,
T, C, D, V, Z
SUB
FNC 21
Âû÷èòàíèå ÷èñëîâûõ äàííûõ
CPU
FX1S
FX1N
FX2N FX2NC
©
©
©
©
Èìï. èíñòðóêöèÿ (P) Îáðàáîòêà Øàãè ïðîãðàììû
16 Bit 32 Bit SUB/SUBP
7
© © DSUB/DSUBP 13
ÔÓÍÊÖÈß
Âû÷èòàíèå äâóõ ÷èñëîâûõ äàííûõ. Ðåçóëüòàò âû÷èòàíèÿ õðàíèòñÿ ïî àäðåñó öåëè.
ÎÏÈÑÀÍÈÅ
b Çíà÷åíèå äàííûõ â (S2+) âû÷èòàåòñÿ èç çíà÷åíèÿ äàííûõ (S1+). Ðåçóëüòàò âû÷èòàíèÿ
çàïîìèíàåòñÿ â àäðåñå öåëè (D+).
(S1+) - (S2+) = (D+)
b  ñòàðøåì áèòå çàïîìèíàåòñÿ çíàê ÷èñëà âû÷èòàíèÿ:
0: çíàê ïîëîæèòåëüíîãî ÷èñëà
1: çíàê îòðèöàòåëüíîãî ÷èñëà
b Ïðè âûïîëíåíèè 32-õ áèòíîé èíñòðóêöèè â íåé óêàçûâàåòñÿ îïåðàíä ñëîâà ìëàäøèõ 16
áèò. Ñëåäóþùèé çà íåé îïåðàíä ÿâëÿåòñÿ îïåðàíäîì ñëîâà ñòàðøèõ 16 áèò.
Ðåêîìåíäóåòñÿ ïðè çàäàíèè àäðåñà ïðèìåíÿòü ÷åòíûå ÷èñëà, ÷òîáû íå
çàïðîãðàììèðîâàòü ïî îøèáêå íàëîæåíèå àäðåñîâ.
b  àäðåñå èñòî÷íèêà (S+) è àäðåñå öåëè (D+) íóæíî òàêæå óêàçûâàòü îäèíàêîâûå òèïû
îïåðàíäîâ.
Ïðîãðàììèðîâàíèå FX1S/FX1N/FX2N/FX2NC
6 – 47