Hardware manual

Rev. 3.0, 09/98, page 35 of 361
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 B1 → (<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 B0 → (<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.
BNOT B ¬ (<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
BTST B ¬ (<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 BC ∧ (<bit-No.> of <EAd>) → C
ANDs the C flag with a specified bit in a general register or memory.
BIAND C ∧ [¬ (<bit-No.> of <EAd>)] → C
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 BC ∨ (<bit-No.> of <EAd>) → C
ORs the C flag with a specified bit in a general register or memory.
BIOR C ∨ [¬ (<bit-No.> of <EAd>)] → C
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 BC ⊕ (<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