Texas Instruments TMS320C28x Reference Manual page 473

SB 8bitOffset,COND
SB 8bitOffset,COND
SYNTAX OPTIONS
SB 8bitOffset,COND
Operands 8bitOffset
COND
Description
Flags and V
Modes Modes
Repeat
6-316
0110 COND CCCC CCCC
8-bit signed immediate constant offset value (−128 to
+127 range)
Conditional codes:
COND Syntax Description
0000 NEQ Not Equal To
0001 EQ Equal To
0010 GT Greater Then
0011 GEQ Greater Then Or Equal To
0100 LT Less Then
0101 LEQ Less Then Or Equal To
0110 HI Higher
0111 HIS, C Higher Or Same, Carry
Set
1000 LO, NC Lower, Carry Clear
1001 LOS Lower Or Same
1010 NOV No Overflow
1011 OV Overflow
1100 NTC Test Bit Not Set
1101 TC Test Bit Set
1110 NBIO BIO Input Equal To Zero
1111 UNC Unconditional
Short conditional branch. If the specified condition is true, then branch
by adding the signed 8-bit constant value to the current PC value;
otherwise continue execution without branching:
If (COND = true) PC = PC + signed 8-bit offset;
If (COND = false) PC = PC + 1;
Note: If (COND = true) then the instruction takes 7 cycles.
If (COND = false) then the instruction takes 4 cycles.
If (COND = UNC) then the instruction takes 4 cycles.
If the V flag is tested by the condition, then V is cleared.
This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
OPCODE OBJMODE RPT CYC
X − 7/4
Flags Tested
Z = 0
Z = 1
Z = 0 AND N = 0
N = 0
N = 1
Z = 1 OR N = 1
C = 1 AND Z = 0
C = 1
C = 0
C = 0 OR Z = 1
V = 0
V = 1
TC = 0
TC = 1
BIO = 0
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