39
Table 2.15
Shift Instructions
Instruction
Instruction Code
Operation
Execution Cycles
T Bit
ROTL
Rn
0100nnnn00000100
T
←
Rn
←
MSB
1
MSB
ROTR
Rn
0100nnnn00000101
LSB
→
Rn
→
T
1
LSB
ROTCL
Rn
0100nnnn00100100
T
←
Rn
←
T
1
MSB
ROTCR
Rn
0100nnnn00100101
T
→
Rn
→
T
1
LSB
SHAL
Rn
0100nnnn00100000
T
←
Rn
←
0
1
MSB
SHAR
Rn
0100nnnn00100001
MSB
→
Rn
→
T
1
LSB
SHLL
Rn
0100nnnn00000000
T
←
Rn
←
0
1
MSB
SHLR
Rn
0100nnnn00000001
0
→
Rn
→
T
1
LSB
SHLL2
Rn
0100nnnn00001000
Rn<<2
→
Rn
1
—
SHLR2
Rn
0100nnnn00001001
Rn>>2
→
Rn
1
—
SHLL8
Rn
0100nnnn00011000
Rn<<8
→
Rn
1
—
SHLR8
Rn
0100nnnn00011001
Rn>>8
→
Rn
1
—
SHLL16 Rn
0100nnnn00101000
Rn<<16
→
Rn
1
—
SHLR16 Rn
0100nnnn00101001
Rn>>16
→
Rn
1
—
Table 2.16
Branch Instructions
Instruction
Instruction Code
Operation
Execution
Cycles
T Bit
BF
label
10001011dddddddd
If T = 0, disp
×
2 + PC
→
PC; if T = 1,
nop
3/1
*
—
BT
label
10001001dddddddd
If T = 1, disp
×
2 + PC
→
PC; if T = 0,
nop
3/1
*
—
BRA
label
1010dddddddddddd
Delayed branch, disp
×
2 + PC
→
PC
2
—
BSR
label
1011dddddddddddd
Delayed branch, PC
→
PR, disp
×
2 +
PC
→
PC
2
—
JMP
@Rm
0100mmmm00101011
Delayed branch, Rm
→
PC
2
—
JSR
@Rm
0100mmmm00001011
Delayed branch, PC
→
PR, Rm
→
PC
2
—
RTS
0000000000001011
Delayed branch, PR
→
PC
2
—
Note:
*
The execution state is three cycles when program branches, and one cycle when program
does not branch.
Содержание HD6417032
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Страница 525: ...490 CK RAS CAS TRp TRc TRcc tRASD1 tRASD2 tCASD3 tCASD2 TRr tCSR Figure 20 18 Self Refresh ...
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