Texas Instruments TMS320C3x - Manual (Page 652)

POP Pop Integer
13-194
Syntax POP dst
Operation *SP– –
→
dst
Operands dst register (Rn, 0
≤
n
≤
27)
Opcode
31 24 23 16 8 7 0 15
0 0 0 0 1 0 1 0 1 dst 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Description The top of the current system stack is popped and loaded into the dst register
(32 LSBs). The top of the stack is assumed to be a signed integer. The POP
is performed with a postdecrement of the stack pointer. The exponent bits of
an extended-precision register (R7–R0) are left unmodified.
Cycles 1
Status Bits These condition flags are modified only if the destination register is R7 – R0.
LUF Unaffected
LV Unaffected
UF 0
N 1 if a negative result is generated; 0 otherwise
Z 1 if a 0 result is generated; 0 otherwise
V 0
C Unaffected
OVM Operation is not affected by OVM bit value.
Example POP R3
Before Instruction After Instruction
R3 00 0000 12DA R3 00 FFFF 0DA4
SP 809856 SP 809855
LUF 0 LUF 0
LV 0 LV 0
UF 0 UF 0
N 0 N 1
Z 0 Z 0
V 0 V 0
C 0 C 0
Data memory
809856h FFFF0DA4 809856h FFFF0DA4
4,826 –62,044
–62,044 –62,044
Mode Bit