Which iphone has armv6

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Now live: A fully responsive profile. Linked 0. Related 0. Choose carefully when excluding architectures. An application build with armv7 will run on all current iOS devices, even those that support newer architectures it will run as bit on iPhone 5S and later.

In addition to the device architecture, Project Settings will also let you choose architectures for the Simulators, where appropriate i. Just as with the device architectures, a special Match Device option is provided for the Simulator Architectures. Selecting this option will once again not hardcode any architectures in the project; instead Elements will automatically pick the appropriate Simulator architectures, based on which device architectures you are building for.

On armv7, the Thumb-2 instruction set no longer has this limitation, so Apple recommends you compile using it almost all the time. You can make the Thumb build setting conditional so that it is off for older devices and on for newer ones.

To do this, go to your Xcode build settings and select the Compile for Thumb option. Go to the menu at the bottom-left of the screen and choose the Add Build Setting Condition option. In the new build setting condition, choose ARMv6 for the architecture, turn off Thumb for it, add another condition, choose ARMv7 for its architecture, and enable Thumb for it.

According to Stephen Canon's answer here , both single and double-precision floating-point operations are supported in hardware in armv6. I've found that single-precision arithmetic performs slightly better on this platform, perhaps due to more operations fitting into cache. On armv7, the NEON SIMD floating-point unit only works on single-precision operations, so there can be a vast difference in performance between single and double precision operations.

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