Please note: We are aware of an issue affecting replies on the Arm Community forums, which may not be loading as expected.
We apologize for any inconvenience and appreciate your patience while we investigate and work to resolve the issue.
Thank you for your understanding.
Dear,
I am developing projcet using cortex-A8, I optimize some algorithm code on cortex-A8 cpu.
The code shall be ported to cortex-A15 in near future, I got some information about BEON and VFP from website,the different NEON / VFP version betweem cortex-A8 and cortex-a15.
cortex-a8: SIMD/VFPv3
cortex-a15:SIMD2/VFPv4
could you tell me the detailed difference of noen version between cortex-A8 and cortex-a15?
Thank you in advance.
BRS,
Meng
Hi Meng,
ARMv7-A/R Architecture Reference Manual, section A1.4.1 "Instruction set architecture extensions". Both Cortex-A8 and Cortex-A15 implement the non-trapping variants.
Really simply put, SIMDv2 and VFPv4 has a fused multiply-accumulate and IEEE754-2008 half-precision (16-bit) floating point support. That's the big, big differences.
Ta,
Matt