Table 2-7 Bit Manipulation Instructions
Instruction
Size
*
Function
BSET
B
1
→
(<bit-No.> of <EAd>)
Sets a specified bit in a general register or memory operand to 1. The bit
number is specified by 3-bit immediate data or the lower 3 bits of a general
register.
BCLR
B
0
→
(<bit-No.> of <EAd>)
Clears a specified bit in a general register or memory operand to 0. The bit
number is specified by 3-bit immediate data or the lower 3 bits of a general
register.
BNOT
B
¬ (<bit-No.> of <EAd>)
→
(<bit-No.> of <EAd>)
Inverts a specified bit in a general register or memory operand. The bit
number is specified by 3-bit immediate data or the lower 3 bits of a general
register.
BTST
B
¬ (<bit-No.> of <EAd>)
→
Z
Tests a specified bit in a general register or memory operand and sets or
clears the Z flag accordingly. The bit number is specified by 3-bit immediate
data or the lower 3 bits of a general register.
BAND
B
C
∧
(<bit-No.> of <EAd>)
→
C
ANDs the carry flag with a specified bit in a general register or memory
operand and stores the result in the carry flag.
BIAND
B
C
∧
[¬ (<bit-No.> of <EAd>)]
→
C
ANDs the carry flag with the inverse of a specified bit in a general register or
memory operand and stores the result in the carry flag.
The bit number is specified by 3-bit immediate data.
Note:
*
Size refers to the operand size.
B: Byte
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