[LLVMdev] [PATCH] Add support for ARM modified immediate syntax

Mihail Popa mihail.popa at gmail.com
Mon Jul 29 07:47:55 PDT 2013


Please review the attached patch. It adds support for "modified immediate"
syntax form to the relevant ARM instructions. Basically these immediate
fields are represented via a pair of values: one being a base value and the
other a modifier. Since some of these values may have multiple
representations, the ARM architecture specification defines a syntax to
guarantee that a specific encoding is obtained. Supporting this syntax is a
requirement for any real assembler/disassembler testing since it's the only
way to guarantee that a binary can be disassembled and reassembled into an
exact copy of its former self.

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