It's certainly a curious topic and while discussing together, we concluded that iPhone5 has A15 dual core -
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438g/index.html
What it is ?
The Cortex-A15 MPCore processor is a high-performance, low-power processor that implements the ARMv7-A architecture. The Cortex-A15 MPCore processor has one to four processors in a single multiprocessor device, or MPCore device, with L1 and L2 cache subsystems.
In addition, A15 MPCore is a lot more powerful with -
NEON technology is the implementation of the Advanced Single Instruction Multiple Data (SIMD) extension to the ARMv7-A architecture. It provides support for integer and floating-point vector operations. This technology extends the processor functionality to provide support for the ARMv7 Advanced SIMDv2 instruction set.
VFP is the vector floating-point coprocessor extension to the ARMv7-A architecture. It provides low-cost high performance floating-point computation. VFP extends the processor functionality to provide support for the ARMv7 VFPv4 instruction set.
You can configure the Cortex-A15 MPCore processor to include different combinations of support for Advanced SIMD and VFP extensions.
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438g/index.html
What it is ?
The Cortex-A15 MPCore processor is a high-performance, low-power processor that implements the ARMv7-A architecture. The Cortex-A15 MPCore processor has one to four processors in a single multiprocessor device, or MPCore device, with L1 and L2 cache subsystems.
In addition, A15 MPCore is a lot more powerful with -
NEON technology is the implementation of the Advanced Single Instruction Multiple Data (SIMD) extension to the ARMv7-A architecture. It provides support for integer and floating-point vector operations. This technology extends the processor functionality to provide support for the ARMv7 Advanced SIMDv2 instruction set.
VFP is the vector floating-point coprocessor extension to the ARMv7-A architecture. It provides low-cost high performance floating-point computation. VFP extends the processor functionality to provide support for the ARMv7 VFPv4 instruction set.
You can configure the Cortex-A15 MPCore processor to include different combinations of support for Advanced SIMD and VFP extensions.
sources : http://support.arm.com
NS throw some light on another revealation from www.anandtech.com which goes as follows -
The iPhone 5 will ship with and only run iOS 6.0. To coincide with the launch of iOS 6.0, Apple has seeded developers with a newer version of its development tools. Xcode 4.5 makes two major changes: it drops support for the ARMv6 ISA (used by the ARM11 core in the iPhone 2G and iPhone 3G), keeps support for ARMv7 (used by modern ARM cores) and it adds support for a new architecture target designed to support the new A6 SoC: armv7s.
What's the main difference between the armv7 and armv7s architecture targets for the LLVM C compiler? The presence of VFPv4 support. The armv7s target supports it, the v7 target doesn't. Why does this matter?
