ARM NEON assembler error: “instruction cannot be conditional”

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北恋
北恋 2021-01-22 20:13

According to the arm info center vadd can be executed condtitionally however when i try

vaddeq.f32 d0,d0,d1

Xcode returns

65:i         


        
3条回答
  •  暖寄归人
    2021-01-22 20:53

    Only instructions shared by NEON and VFP can be executed conditionally.

    (vldmia for example.)

    For me, there have been a few situations where conditional execution could have saved me from some minor headaches, but in general, you won't need it that badly.

    Take a careful look at the NEON logical and compare operations. They very well indicate how NEON is supposed to be programmed.

    cya.

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