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Conditional execution of NEON instructions

Most NEON instructions always execute unconditionally.

In ARM state, except for the instructions that are common to both VFP and NEON, you cannot use a condition code to control the execution of NEON instructions.

In Thumb state, you can use an IT instruction to set condition codes on up to four following NEON instructions. However, ARM deprecates the use of any NEON instruction that does not also exist in VFP, in an IT block.