Instruction formats and opcodes, Instruction fields – Freescale Semiconductor StarCore SC140 User Manual
Page 697
SBC
SC140 DSP Core Reference Manual
A-383
The two instructions shown can be used for a 64-bit subtraction, with the sub d0,d1,d1 performing the
lower 32 bits, and the resultant borrow used for the LSB calculation of the upper 32 bits calculated by sbc
d2,d3.
Instruction Formats and Opcodes
Note:
** indicates serial grouping encoding.
Instruction Fields
Dc,Dd
ee
Data Register Pairs
SR
$00E4 0001
$00E4 0000
EMR
$0000 0000
Instruction
Words Cycles Type
Opcode
15
8
7
0
SBC Dc,Dd
1
1
1
0
*
1
0
1
1
e
e
0
1
1
1
1
0
1
1
00
D0,D1
01
D2,D3
10
D4,D5
11
D6,D7
Note:
This instruction can specify D8-D15 as operands by using a prefix.
Register/Memory Address
Before
After