Cheney-Shue’s Profile | Apple Developer Forums

Does Apple M4 support ARM SVE instructions?

It's said Apple M4 is an ARMv9 chip. I wrote assembly with ARM SVE instructions. And set an iPad M4 simulated device as running target. When execute, it throw "EXC_BAD_INSTRUCTION" error. Does Apple M4 support SVE?

Developer Tools & Services General

2

0

3k

Jun ’24

How to enable BFloat16 data type?

When compile source with __bf16 variable, it throw exception, "__bf16 is not supported on this target". The compiler is xcode build-in clang-1400.0.29.202. Is Apple silicon support bf16 type?

Developer Tools & Services Xcode Xcode LLVM Compiler simd

2

0

2.9k

Mar ’23

aarch64 intrinsics

Many useful ARM intrinsics (such as fma, rng, ld64b, etc.) are described in Arm C Language Extensions. But the arm_acle.h header file shipped with Xcode not include them. Are these intrinsics supported by Apple Silicon chip?

Developer Tools & Services Xcode Xcode Apple Silicon Accelerate

1

0

2.1k

May ’23

How to access ARM system registers?

I want to retrieve processor features at runtime. I used 'MRS' instruction to access system registers. But it failed on my M1 MacBook. I tried the same code on Nvidia Orin(ARM ISA), it's works. On MacOS, I found only 'NZCV' system register I can access. Does Apple impose limitation on other system registers?

Developer Tools & Services General

1

0

475

Jul ’24

Cheney-Shue

Post

Replies

Boosts

Views

Activity