Djay and Vjay Updated for iPhone 5s, 64-Bit A7 Processor 2-4 Times Faster for Some Tasks

[OneMike]

Vjay is a terrible, terrible name

video jockey. I think it's an awesome name.

 

[skratch77]

The only publication I've read that didn't shrug off the A7 as nothing special was The Verge.

The truth is that Apple has embraced the much more efficient Arm v8 instruction set, while I imagine that Samsung's foray into 64 bit will likely still be using the BIG little instruction set which is akin to Intel's chasing MHz with the old NetBurst design while AMD sought efficiency and parallelism.

The a15 big little is based on av7 and is the last reference design from arm and its the last version that is 32 bit and based on v7.

Samsung has no where to go from a15 and has no choice to use a50 series arch that is...you guessed it 64 bit and uses v8 instruction set

 

[mdelvecchio]

I think you have it in reverse. If anybody else had created a 64 bit chip, people like you would be decrying that its nothing but useless hardware spec used for bragging and that its all about the user experience. But when apple does it, its amazing and a game-changer.

that's because it works when apple does it.

please see:

- fingerprint scanners
- tablets
- cell phones
- music stores
- mp3 players
- personal computers

 

[SPUY767]

The a15 big little is based on av7 and is the last reference design from arm and its the last version that is 32 bit and based on v7.

Samsung has no where to go from a15 and has no choice to use a50 series arch that is...you guessed it 64 bit and uses v8 instruction set

I stand corrected, I just assumed that Samsung would be in the same position as Intel knowingly eating its own inferior dog food.

 

[123]

And people said 64-bit was useless in a mobile phone.

"64-bit" is completely useless for a mobile phone. The ARMv8 instruction set is good, the A7 processor is good, but this has absolutely NOTHING to do with being 64-bit. The fastest way to move memory is via new NEON SIMD instructions (nothing to do with 64-bit). Faster processing is possible due to better SIMD instructions (128-bit) and more registers (in 64-bit mode, but it is irrelevant that they are 64-bit wide). FPU has been 64-bit before.