This question applies to a Cortex-A76 using arm64-v8a with the latest Android Studio. When I try to use the SIMD instructions: fcadd or fcmla, I get the build error: "error: instruction requires: complxnum". Is there something unique about the mobile phone arm instruction set (like those instructions were not included in the hardware) or do I not understand how to properly include "complxnum" in the build instructions? All my other assembly code is working fine. Thanks in advance!
Cortex A-76 unfortunately doesn't include the complxnum subset of instructions, which includes fcadd and fcmla. A-76 implements Arm v8.2A with a couple of 8.3 & 8.4 additions, but doesn't appear to have the complxnum instructions that were added in v8.3A.