2.5.5
Bit Manipulations
Table 2.8 describes the bit-manipulation instructions. Figure 2.7 shows their object code formats.
Table 2.8 Bit-Manipulation Instructions
Instruction
Size*
Function
BSET
B
1 → (<bit no.> of <EAd>)
Sets a specified bit in a general register or memory to 1. The bit is
specified by a bit number, given in 3-bit immediate data or the lower
three bits of a general register.
BCLR
BNOT
BTST
B
B
B
0 → (<bit no.> of <EAd>)
Clears a specified bit in a general register or memory to 0. The bit is
specified by a bit number, given in 3-bit immediate data or the lower
three bits of a general register.
¬ (<bit no.> of <EAd>) → (<bit no.> of <EAd>)
Inverts a specified bit in a general register or memory. The bit is
specified by a bit number, given in 3-bit immediate data or the lower
three bits of a general register.
¬ (<bit no.> of <EAd>) → Z
Tests a specified bit in a general register or memory and sets or
clears the Z flag accordingly. The bit is specified by a bit number,
given in 3-bit immediate data or the lower three bits of a general
register.
BAND
B
B
B
C
(<bit no.> of <EAd>) → C
ANDs the C flag with a specified bit in a general register or memory.
C [¬ (<bit no.> of <EAd>)] → C
BIAND
ANDs the C flag with the inverse of a specified bit in a general
register or memory.
The bit number is specified by 3-bit immediate data.
BOR
C
(<bit no.> of <EAd>) → C
ORs the C flag with a specified bit in a general register or memory.
C [¬ (<bit no.> of <EAd>)] → C
BIOR
ORs the C flag with the inverse of a specified bit in a general register
or memory.
The bit number is specified by 3-bit immediate data.
BXOR
C
(<bit no.> of <EAd>) → C
XORs the C flag with a specified bit in a general register or memory.
Note: * Size: Operand size
B: Byte
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HITACHI [ HITACHI SEMICONDUCTOR ]
