Cmpgt, Compare for greater than (dalu), Instruction formats and opcodes – Freescale Semiconductor StarCore SC140 User Manual
Page 437: Instruction fields, Operation assembler syntax
CMPGT
SC140 DSP Core Reference Manual
A-123
CMPGT
Compare for Greater Than (DALU)
CMPGT
Description
Status and Conditions that Affect Instruction
None.
Status and Conditions Changed by Instruction
Example
cmpgt d2,d3
Instruction Formats and Opcodes
Note:
** indicates serial grouping encoding.
Instruction Fields
Da JJJ
Single
Source Data Register
Operation
Assembler Syntax
Dn > Da
→ T
CMPGT Da,Dn
CMPGT Da,Dn
Compares two data registers (Da and Dn). The T bit is set if the signed value in the second data register
(Dn) is greater than the signed value in the first (Da); T is cleared otherwise.
Register Address
Bit Name
Description
SR[1]
T
Sets T bit if Dn > Da, otherwise cleared.
Register/Memory Address
Before
After
D2
$0000 35FA
D3
$0000 35FB
SR
$00E4 0000
$00E4 0002
Instruction
Words Cycles Type
Opcode
15
8
7
0
CMPGT Da,Dn
1
1
1
0
*
1
1
0
0
F
F
F
1
1
1
0
J
J
J
000
D0
010
D2
100
D4
110
D6
001
D1
011
D3
101
D5
111
D7
Note:
This instruction can specify D8-D15 as operands by using a prefix.