Motorola DigitalDNA ColdFire MCF5272 User Manual page 79

Table 2-10 lists execution times for MOVE.{B,W} instructions.
Table 2-10. Move Byte and Word Execution Times
Source
Rx
Dy 1(0/0)
Ay 1(0/0)
(Ay) 3(1/0)
(Ay)+ 3(1/0)
-(Ay) 3(1/0)
(d16,Ay) 3(1/0)
(d8,Ay,Xi*SF) 4(1/0)
(xxx).w 3(1/0)
(xxx).l 3(1/0)
(d16,PC) 3(1/0)
(d8,PC,Xi*SF) 4(1/0)
#<xxx> 1(0/0)
Table 2-11 lists timings for MOVE.L.
Source
Rx
Dy 1(0/0)
Ay 1(0/0)
(Ay) 2(1/0)
(Ay)+ 2(1/0)
-(Ay) 2(1/0)
(d16,Ay) 2(1/0)
(d8,Ay,Xi*SF) 3(1/0)
(xxx).w 2(1/0)
(xxx).l 2(1/0)
(d16,PC) 2(1/0)
(d8,PC,Xi*SF) 3(1/0)
#<xxx> 1(0/0)
Table 2-12 gives execution times for MOVE.L instructions accessing program-visible
registers of the MAC unit, along with other MOVE.L timings. Execution times for moving
contents of the ACC or MACSR into a destination location represent the best-case scenario
when the store instruction is executed and no load, MAC, or MSAC instructions are in the
(Ax) (Ax)+
1(0/1) 1(0/1)
1(0/1) 1(0/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
31/1) 3(1/1)
3(1/1) 3(1/1)
4(1/1) 4(1/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
4(1/1) 4(1/1)
3(0/1) 3(0/1)
Table 2-11. Move Long Execution Times
(Ax) (Ax)+
1(0/1) 1(0/1)
1(0/1) 1(0/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
3(1/1) 3(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
3(1/1) 3(1/1)
2(0/1) 2(0/1)
Chapter 2. ColdFire Core
Destination
-(Ax) (d16,Ax) (d8,Ax,Xi*SF)
1(0/1) 1(0/1)
1(0/1) 1(0/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
3(1/1) 3(1/1)
4(1/1) —
3(1/1) —
3(1/1) —
3(1/1) 3(1/1)
4(1/1) —
3(0/1) —
Destination
-(Ax) (d16,Ax)
1(0/1) 1(0/1)
1(0/1) 1(0/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
2(1/1) 2(1/1)
3(1/1) —
2(1/1) —
2(1/1) —
2(1/1) 2(1/1)
3(1/1) —
2(0/1) —
Instruction Timing
(xxx).wl
2(0/1) 1(0/1)
2(0/1) 1(0/1)
4(1/1) 3(1/1)
4(1/1) 3(1/1)
4(1/1) 3(1/1)
— —
— —
— —
— —
— —
— —
— —
(d8,Ax,Xi*SF) (xxx).wl
2(0/1) 1(0/1)
2(0/1) 1(0/1)
3(1/1) 2(1/1)
3(1/1) 2(1/1)
3(1/1) 2(1/1)
— —
— —
— —
— —
— —
— —
— —
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