Texas Instruments TMS320C28x

Shift Operations
2-47Central Processing Unit
Table 2−11. Shift Operations (Continued)
Operation Type Illustration
Rotate ACC right by 1 bit. Bit 0 of ACC
fills the carry bit (C). C fills bit 31 of ACC.
Syntax:
ROR ACC
Rotate right
ACC
32 bits to ACC
C
Logical right shift of ACC:P.
Syntaxes:
LSR64 ACC:P, 1...16
LSR64, ACC:P, T shift = T(5:0)
Shift right
ACC:P
64 bits to ACC:P
0
C
Last
bit out
Discard
other bits
Logical left shift of ACC:P.
Syntaxes:
LSL64 ACC:P, 1...16
LSL64 ACC:P, T shift = T(5:0)
Shift left
0
ACC:P
64 bits to ACC:P
C
Last
bit out
Discard
other bits
Arithmetic right shift of ACC:P.
Syntaxes:
ASR64 ACC:P, 1...16
ASR64, ACC:P, T shift = T(5:0)
Shift right
ACC:P
64 bits to ACC:P
Sign
C
Last
bit out
Discard
other bits
Conditional shift of ACC by 1 bit.
Syntaxes:
NORM ACC, aux++
NORM ACC, aux−−
SUBCU ACC, loc
Shift left
0
ACC
32 bits to ACC
Discard