Table 6-27 Data Alu Shifting Instructions - Motorola DSP56800 Manual

Instruction Set Introduction
Operation
ASL
ASLL
ASR
ASRR
ASRAC
LSL
LSR
LSRR
LSRAC
ROL
ROR
6-24
Table 6-27. Data ALU Shifting Instructions
Operands C
FDD 2
Y1,X0,FDD 2
Y0,X0,FDD
Y1,Y0,FDD
Y0,Y0,FDD
A1,Y0,FDD
B1,Y1,FDD
FDD 2
Y1,X0,FDD 2
Y0,X0,FDD
Y1,Y0,FDD
Y0,Y0,FDD
A1,Y0,FDD
B1,Y1,FDD
Y1,X0,F 2
Y0,X0,F
Y1,Y0,F
Y0,Y0,F
A1,Y0,F
B1,Y1,F
FDD 2
FDD 2
Y1,X0,FDD 2
Y0,X0,FDD
Y1,Y0,FDD
Y0,Y0,FDD
A1,Y0,FDD
B1,Y1,FDD
Y1,X0,F 2
Y0,X0,F
Y1,Y0,F
Y0,Y0,F
A1,Y0,F
B1,Y1,F
FDD 2
FDD 2
DSP56800 Family Manual
W Comments
1 Arithmetic shift left entire register by 1 bit
1 Arithmetic shift left of the first operand by value
specified in four LSBs of the second operand;
places result in FDD
1 Arithmetic shift right entire register by 1 bit
1 Arithmetic shift right of the first operand by
value specified in four LSBs of the second
operand; places result in FDD
1 Arithmetic word shifting with accumulation
1 1-bit logical shift left of word
1 1-bit logical shift right of word
1 Logical shift right of the first operand by value
specified in four LSBs of the second operand;
places result in FDD (when result is to an accu-
mulator F, zero extends into F2)
1 Logical word shifting with accumulation
1 Rotate 16-bit register left by 1 bit through the
carry bit
1 Rotate 16-bit register right by 1 bit through the
carry bit