ARM MacBook vs. Intel MacBook: A SIMD Benchmark

Re:ARM MacBook vs. Intel MacBook: A SIMD Benchmark by andy_ppp on Sunday December 13, 2020 @04:22PM (#25410414)

I’m kind of interested about what happens if you throw random opcodes at processors now!

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Re:ARM MacBook vs. Intel MacBook: A SIMD Benchmark by aw1621107 on Sunday December 13, 2020 @04:54PM (#25410722)

You might be interested in sandsifter [0], which does precisely that!

[0]: https://github.com/xoreaxeaxeax/sandsifter

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Re:ARM MacBook vs. Intel MacBook: A SIMD Benchmark by dirtypersian on Sunday December 13, 2020 @04:45PM (#25410628)

I would guess the processor would just cause an exception/interrupt and it would just call an OS level exception/interrupt handler which would probably tell the user what the exception/interrupt was that occured; in this case an unsupported instruction.

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Re:ARM MacBook vs. Intel MacBook: A SIMD Benchmark by nicoburns on Sunday December 13, 2020 @04:49PM (#25410662)

I believe most processors have undocumented opcodes. Often used for internal debugging or similar.

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Re:ARM MacBook vs. Intel MacBook: A SIMD Benchmark by grishka on Sunday December 13, 2020 @04:57PM (#25410747)

Your program will crash with SIGILL.

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