PM0044 |
STM8 addressing modes |
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6.5Indirect (Short Pointer Long, Long Pointer Long)
Table 28. Overview of Indirect addressing instructions
Addressing mode |
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Syntax |
EA formula |
Ptr Adr |
Ptr |
Dest adr |
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Size |
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Short Pointer Long |
Indirect |
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((shortptr.w)) |
((shortptr.w)) |
00..FF |
Word |
0000..FFFF |
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Long Pointer Long |
Indirect |
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((longptr.w)) |
((longptr.w)) |
0000..FFFF |
Word |
0000..FFFF |
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The data byte required for the operation is found by its memory address, located in memory (pointer).
The pointer address follows the op-code. The indirect addressing mode is made of three sub-modes:
Table 29. Available Long Pointer Long and Short Pointer Long Indirect Instructions
Instructions |
Functions |
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LD, LDW |
Load |
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CP |
Compare |
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AND, OR, XOR |
Logical Operations |
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ADC, ADD, SUB, SBC |
Arithmetic Addition/Subtraction operations |
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BCP |
Bit Compare |
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CALL, JP |
Call or Jump subroutine |
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Table 30. Available Long Pointer Long Indirect Instructions
Instructions |
Functions |
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CLR |
Clear |
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TNZ |
Test Negative or Zero |
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CPL, NEG |
1’s or 2’s Complement |
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SLA, SLL, SRL, SRA, RLC, RRC |
Shift and Rotate Operations |
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SWAP |
Swap Nibbles |
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INC, DEC |
Increment/Decrement |
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Doc ID 13590 Rev 3 |
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