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ARM Compiler armasm User Guide : Advanced SIMD operations not affected by flush-to-zero mode

Advanced SIMD operations not affected by flush-to-zero mode

Some Advanced SIMD instructions can be carried out on denormalized numbers even in flush-to-zero mode, without flushing the results to zero.

These instructions are as follows:

  • Copy, absolute value, and negate (VMOV, VMVN, V{Q}ABS, and V{Q}NEG).

  • Duplicate (VDUP).

  • Swap (VSWP).

  • Load and store (VLDR and VSTR).

  • Load multiple and store multiple (VLDM and VSTM).

  • Transfer between extension registers and ARM general-purpose registers (VMOV).

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