 | Services and Modeling for Embedded Software Development |
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| Services and Modeling for Embedded Software Development |
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Encoding (format 4):
0 | 0 | 1 | 1 | 1 | 1 | 0 | d2 | d1 | d0 | a2 | a1 | a0 | s2 | s1 | s0 |
Syntax:
STW (-Rd,S),Ra
Constraints:
Outcome:
Notes:
For the avoidance of doubt, the decrement of Ra is carried out before Ra is used to compute the address for loading.
This opcode accesses data memory, and the computed address is therefore a byte address. Accessing a non-existent memory location will trigger a bus error exception.
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| 3.5.11. STB: Indexed Store Byte with Predecrement |  | 3.6. Detailed Descriptions of 16-bit Branch/Jump Instructions |