binutils-gdb/include
Victor Do Nascimento 51bb8593e6 aarch64: rcpc3: New RCPC3_ADDR operand types
The particular choices of address indexing, along with their encoding
for RCPC3 instructions lead to the requirement of a new set of operand
descriptions, along with the relevant inserter/extractor set.

That is, for the integer load/stores, there is only a single valid
indexing offset quantity and offset mode is allowed - The value is
always equivalent to the amount of data read/stored by the
operation and the offset is post-indexed for Load-Acquire RCpc, and
pre-indexed with writeback for Store-Release insns.

This indexing quantity/mode pair is selected by the setting of a
single bit in the instruction. To represent these insns, we add the
following operand types:

  - AARCH64_OPND_RCPC3_ADDR_OPT_POSTIND
  - AARCH64_OPND_RCPC3_ADDR_OPT_PREIND_WB

In the case of loads and stores involving SIMD/FP registers, the
optional offset is encoded as an 8-bit signed immediate, but neither
post-indexing or pre-indexing with writeback is available.  This
created the need for an operand type similar to
AARCH64_OPND_ADDR_OFFSET, with the difference that FLD_index should
not be checked.

We thus introduce the AARCH64_OPND_RCPC3_ADDR_OFFSET operand, a
variant of AARCH64_OPND_ADDR_OFFSET, w/o the FLD_index bitfield.
2024-01-15 13:11:48 +00:00
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opcode aarch64: rcpc3: New RCPC3_ADDR operand types 2024-01-15 13:11:48 +00:00
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