Pst/Ddata Specification For Mac Instructions - Motorola ColdFire MCF5281 User Manual

Table 29-22. PST/DDATA Specification for User-Mode Instructions (continued)
Instruction Operand Syntax
wddata.b <ea>y
wddata.l <ea>y
wddata.w <ea>y
1
For JMP and JSR instructions, the optional target instruction address is displayed only for those effective address fields
defining variant addressing modes. This includes the following <ea>x values: (An), (d16,An), (d8,An,Xi), (d8,PC,Xi).
2
For Move Multiple instructions (MOVEM), the processor automatically generates line-sized transfers if the operand
address reaches a 0-modulo-16 boundary and there are four or more registers to be transferred. For these line-sized
transfers, the operand data is never captured nor displayed, regardless of the CSR value.
The automatic line-sized burst transfers are provided to maximize performance during these sequential memory access
operations.
3
During normal exception processing, the PST output is driven to a 0xC indicating the exception processing state. The
exception stack write operands, as well as the vector read and target address of the exception handler may also be
displayed.
Exception Processing PST = 0xC, {PST = 0xB,DD = destination}, // stack frame
The PST/DDATA specification for the reset exception is shown below:
Exception Processing PST = 0xC,
The initial references at address 0 and 4 are never captured nor displayed since these
accesses are treated as instruction fetches.
For all types of exception processing, the PST = 0xC value is driven at all times, unless the
PST output is needed for one of the optional marker values or for the taken branch indicator
(0x5).
Table 29-23 shows the PST/DDATA specification for multiply-accumulate instructions.
Table 29-23. PST/DDATA Specification for MAC Instructions
Instruction Operand Syntax
mac.l Ry,Rx,Accx
mac.l RyRx,<ea>,Rw,Accx
mac.w Ry,Rx,Accx
mac.w Ry,Rx,<ea>,Rw,Accx
move.l <ea>y,Accx
move.l Accy,Accx
move.l <ea>y,MACR
move.l <ea>y,MASK
move.l <ea>y,Accext01
move.l <ea>y,Accext23
MOTOROLA
PST = 0x4, {PST = 0x8, DD = source operand
PST = 0x4, {PST = 0xB, DD = source operand
PST = 0x4, {PST = 0x9, DD = source operand
{PST = 0xB,DD = destination}, // stack frame
{PST = 0xB,DD = source},
PST = 0x5, {PST = [0x9AB],DD = target}
PST = 0x5, {PST = [0x9AB],DD = target}
PST = 0x1
PST = 0x1, {PST = 0xB, DD = source operand}
PST = 0x1
PST = 0x1, {PST = 0xB, DD = source operand}
PST = 0x1
PST = 0x1
PST = 0x1
PST = 0x1
PST = 0x1
PST = 0x1
Chapter 29. Debug Support
Processor Status, DDATA Definition
PST/DDATA
// vector read
// handler PC
// handler PC
PST/DDATA
29-43