8.9 T32 branch target alignment

armasm can issue warnings about non word-aligned branch targets in T32 code.

On some processors, non word-aligned T32 instructions sometimes take one or more additional cycles to execute in loops. This means that it can be an advantage to ensure that branch targets are word-aligned. To ensure armasm reports such warnings, use the --diag_warning 1604 command-line option when invoking it.

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