74 lines
1.6 KiB
YAML
74 lines
1.6 KiB
YAML
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structures:
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main:
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bits: 32
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ranges:
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31-28:
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name: cond
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27:
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name: 0
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26:
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name: 1
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25:
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name: I
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24:
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name: P
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description: pre / post indexing bit
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values:
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0: post, add offset after transfer
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1: pre, add offset before transfer
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23:
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name: U
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description: up / down bit
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values:
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0: down, subtract offset from base
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1: up, addition offset to base
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22:
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name: B
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description: byte / word bit
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values:
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0: transfer word quantity
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1: transfer byte quantity
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21:
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name: W
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description: write-back bit
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values:
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0: no write-back
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1: write address into base
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20:
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name: L
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description: load / store bit
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values:
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0: store to memory
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1: load from memory
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19-16:
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name: Rn
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description: base register
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15-12:
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name: Rd
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description: source / destination register
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11-0:
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name: offset
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depends-on: 25
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values:
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0:
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description: offset is an immediate value
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structure: immediateOffset
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1:
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description: offset is a register
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structure: registerOffset
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immediateOffset:
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bits: 12
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ranges:
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11-0:
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name: 12-bit immediate offset
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description: unsigned number
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registerOffset:
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bits: 12
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ranges:
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11-4:
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name: shift
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description: shift applied to Rm
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3-0:
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name: Rm
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description: offset register
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