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Chapter 3 Functions
3.2 Functions
Bit TeST & Set
Test bit & set
[ Flag Change ]
[ Description Example ]
[ Related Instructions ] BCLR,BSET,BNOT,BNTST,BTST,BTSTC
[ Selectable dest ]
dest
bit,R0 bit,R1 bit,R2 bit,R3
bit,A0 bit,A1 [A0] [A1]
base:8[A0] base:8[A1] bit,base:8[SB] bit,base:8[FB]
base:16[A0] base:16[A1] bit,base:16[SB]
bit,base:16
C
bit,base:11[SB]
BTSTS BTSTS
[ Function ]
• This instruction transfers inverted
dest
to the Z flag and non-inverted
dest
to the C flag. Then it stores
1 in
dest
.
Conditions
Z : The flag is set when
dest
is 0; otherwise cleared.
C : The flag is set when
dest
is 1; otherwise cleared.
BTSTS flag
BTSTS 4,Ram
BTSTS 16,Ram:16[SB]
BTSTS [A0]
[ Syntax ]
BTSTS dest
[ Operation ]
Z
________
dest
C dest
dest 1
UIOBSZDC
[ Instruction Code/Number of Cycles ]
Page=
162
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