From wikipedia:
The A7 features an Apple-designed[2] 64-bit[4] 1.3[2]–1.4[3] GHz ARMv8-A[6][5] dual-core CPU,[2] called Cyclone.[6] The ARMv8-A instruction set doubles the number of registers of the A7 compared to the ARMv7 used in A6.[12] It now has 31 general purpose registers that are each 64-bits wide and 32 floating-point/NEON registers that are each 128-bits wide.[4]
The A7 also integrates a graphics processing unit (GPU) which AnandTech believes to be a PowerVR G6430 in a four cluster configuration.[9]