Swap %Rd, %Rs - Seiko Epson S1C17 Series Manual

swap %rd, %rs

Function Swap
Standard)
Extension 1) Unusable
Extension 2) Unusable
15 14 13 12 11 10
Code
0 0 1
| |
IL IE C
Flag
| |
– – –
Mode
Src:Register direct %rs = %r0 to %r7
Dst:Register direct %rd = %r0 to %r7
CLK
One cycle
Description (1) Standard
Swaps the byte order of the 16 low-order bits of the rs register high and low and loads the
results to the rd register.
23
rs X
23
0
rd
(2) Delayed slot instruction
This instruction may be executed as a delayed slot instruction by writing it directly after a
branch instruction with the "d" bit.
Example
When r1 = 0x123456
swap %r2,%r1
S1C17 FAMILY S1C17 CORE MANUAL
rd(15:8) ← rs(7:0), rd(7:0) ← rs(15:8), rd(23:16) ← 0
9 8 7
| |
0 1 1 r d
| | | | |
V Z N
| | |
– – –
16 15
X X X X X X X
16
0 0 0 0 0 0 0
15
; 0x005634 → r2
6 5 4 3 2 1 0
|
1 1 1 1 r s
| | | | |
8 7
Byte 1 Byte 0
Byte 0 Byte 1
8 7
EPSON
7 DETAILS OF INSTRUCTIONS
0
0
7-119