Rev. 1.0, 02/00, page 39 of 1141
Table 2.5
Logic Instructions
Instruction
Size
*
Function
AND
B/W/L
Rd
∧
Rs
→
Rd, Rd
∧
#IMM
→
Rd
Performs a logical AND operation on a general register and
another general register or immediate data
OR
B/W/L
Rd
∨
Rs
→
Rd, Rd
∨
#IMM
→
Rd
Performs a logical OR operation on a general register and
another general register or immediate data
XOR
B/W/L
Rd
⊕
Rs
→
Rd, Rd
⊕
#IMM
→
Rd
Performs a logical exclusive OR operation on a general register
and another general register or immediate data
NOT
B/W/L
~ Rd
→
Rd
Takes the one's complement (logical complement) of general
register contents
Note:
*
Size refers to the operand size.
B:
Byte
W: Word
L:
Longword
Table 2.6
Shift Instructions
Instruction
Size
*
Function
SHAL
SHAR
B/W/L
Rd (shift)
→
Rd
Performs an arithmetic shift on general register contents
A 1-bit or 2-bit shift is possible
SHLL
SHLR
B/W/L
Rd (shift)
→
Rd
Performs a logical shift on general register contents
A 1-bit or 2-bit shift is possible
ROTL
ROTR
B/W/L
Rd (rotate)
→
Rd
Rotates general register contents
1-bit or 2-bit rotation is possible
ROTXL
ROTXR
B/W/L
Rd (rotate)
→
Rd
Rotates general register contents through the carry flag
1-bit or 2-bit rotation is possible
Note:
*
Size refers to the operand size.
B:
Byte
W: Word
L:
Longword