No more 32-bits; Arm's 2023 CPU 64-bit only

Ink

Administrator
Thread author
Verified
Staff Member
Well-known
Jan 8, 2011
22,361
Arm has announced that from 2023, all of its new smartphone CPU cores will be 64-bit only, with no 32-bit compatibility mode. We have had 64-bit capable smartphone processors since 2013 when Apple included the 64-bit A7 processor in the iPhone 5s. 64-bit CPUs came to Android soon after, but all those CPUs could run both 32-bit code and 64-bit code. So, we went from 32-bit only, to 32-bit and 64-bit, and now we are leaving 32-bits behind and moving to a 64-bit only era. What does that mean for Android? Let’s find out.

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MacDefender

Level 16
Verified
Top Poster
Oct 13, 2019
779
Makes perfect sense. Apple already has some of their cores in the “bionic” configuration only supporting 64 bit. Unlike the x86_64 being a logical extension of 32 bit x86 instructions, the 64 bit ARM instruction set is a total reinvention that threw away decades of ARM’s weirdness to reinvent a simpler instruction set that’s more RISC. The logic on the chip to support 32 bit instructions is wasteful and comes at the cost of being able to execute 64-bit ARM faster.
 

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