Aha, hw.optional! That's useful, thanks Georges! -- Jason Liu
On Mon, Apr 26, 2021 at 2:16 PM Georges Martin <jrjsm...@gmail.com> wrote: > $ sysctl hw.optional | grep -E 'neon|armv8' > hw.optional.neon: 1 > hw.optional.neon_hpfp: 1 > hw.optional.neon_fp16: 1 > hw.optional.armv8_1_atomics: 1 > hw.optional.armv8_crc32: 1 > hw.optional.armv8_2_fhm: 1 > hw.optional.armv8_2_sha512: 1 > hw.optional.armv8_2_sha3: 1 > > Le 26 avr. 2021 à 19:55, Jason Liu <jason...@umich.edu> a écrit : > > On Mon, Apr 26, 2021 at 1:42 PM Christopher Jones < > jon...@hep.phy.cam.ac.uk> wrote: > >> Thats not at all surprising as those instruction sets are very much >> specific to X86_64 systems. >> >> RISC processors, Arm, do have their own sets of SIMD instructions (e.g. >> Neon), but they are entirely different to those on X86_64 machines. >> >> Whether or these are supported on Apple’s M1 processors I have no idea. >> > > It looks like the M1 supports Neon SIMD instructions, but not SVE SIMD > (which I guess is supposed to be similar to AVX?): > > https://discussions.apple.com/thread/252073619 > > -- > Jason Liu > > > On Mon, Apr 26, 2021 at 1:42 PM Christopher Jones < > jon...@hep.phy.cam.ac.uk> wrote: > >> >> >> On 26 Apr 2021, at 6:28 pm, Jason Liu <jason...@umich.edu> wrote: >> >> Thanks Arno :) >> >> I'm kind of surprised that the M1 doesn't seem to support any SSE or >> AVX.... >> >> >> >> Thats not at all surprising as those instruction sets are very much >> specific to X86_64 systems. >> >> RISC processors, Arm, do have their own sets of SIMD instructions (e.g. >> Neon), but they are entirely different to those on X86_64 machines. >> >> Whether or these are supported on Apple’s M1 processors I have no idea. >> >> Chris >> >> >> >> >> Does "sysctl machdep.cpu.features" return anything? >> >> -- >> Jason Liu >> >> >> On Mon, Apr 26, 2021 at 1:23 PM Arno Hautala <a...@alum.wpi.edu> wrote: >> >>> > On 26 Apr 2021, at 13:20, Jason Liu <jason...@umich.edu> wrote: >>> > >>> > sysctl machdep.cpu.brand_string ; sysctl machdep.cpu | grep -i >>> "avx\|sse” >>> >>> $ sysctl machdep.cpu.brand_string ; sysctl machdep.cpu | grep -i >>> "avx\|sse” >>> machdep.cpu.brand_string: Apple M1 >>> >>> -- >>> arno s hautala /-| a...@alum.wpi.edu >>> >>> pgp b2c9d448 >>> >>> >>> >> >
