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IRET
6-116
IRET
Interrupt Return
SYNTAX OPTIONS
OPCODE
OBJMODE
RPT
CYC
IRET
0111 0110 0000 0010
X
−
8
Operands
None
Description
Return from an interrupt. The IRET instruction restores the PC value and
other register values that were automatically saved by an interrupt
operation. The order in which the values are restored is opposite to the order
in which they were saved. All values are popped from the stack using 32-bit
operations. The stack pointer is not forced to align to an even address during
the register restore operations:
SP = SP – 2;
PC = [SP];
SP = SP – 2;
DBGSTAT:IER = [SP];
SP = SP − 2;
DP:ST1 = [SP];
SP = SP – 2;
AR1:AR0 = [SP];
SP = SP – 2;
PH:PL = [SP];
SP = SP – 2;
AH:AL = [SP];
SP = SP – 2;
T:ST0 = [SP];
SP = SP – 1;
Note:
Interrupts cannot be serviced until the IRET instruction completes execution.
Flags and
SXM
The operation restores the state of all flags and modes of the ST0 register.
g
Modes
OVM
TC
C
Z
N
V
PM
OVC
INTM
The operation restores the state of the specified flags and modes of the ST1
register. The following bits are not affected: LOOP, IDLESTAT, M0M1MAP
Summary of Contents for TMS320C28x
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Page 269: ...IN loc16 PA 6 112 MOV AL 0 AL 0 UOUT IORegC AL IOspace IORegC AL 10...
Page 308: ...MAXCUL P loc32 6 151 Saturate MOVL Var64 2 ACC Store result into Var64 MOVL Var64 P...
Page 509: ...SUBL ACC P PM 6 352 SUBL ACC P PM ACC S B 11 M X 4 MOVH Y ACC 5 Store Q15 result into Y...
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