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Architecture Changes
F-5
Migration From C27x to C28x
F.1.2 Full Context Save and Restore
On both C27x and C28x, the registers in Figure F
on the stack on an interrupt or trap operation and automatically restored on an
IRET instruction.
Figure F
−
2. Full Context Save/Restore
31 16
1 0
T
ST0
AH
AL
PH
PL
AR1
AR0
DP
ST1
DBGSTAT
IER
PCH
PCL
Due to the register changes described in section F.1.1. C28x additional regis-
ters must be saved for a full-context store. Figure F
3 shows the difference
between a C27x and C28x full-context save/restore for an interrupt or trap.
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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