cpu_flags_arm options

aes
Use the AES cryptography instruction set
crc32
Use the CRC32 instruction set
edsp
Use the enhanced DSP instructions (ARMv*E and ARMv6+)
iwmmxt
Use the iwMMXt instruction set
iwmmxt2
Use the iwMMXt2 instruction set
neon
Use the NEON (ASIMD) instruction set
sha1
Use the SHA-1 cryptography instruction set
sha2
Use the SHA-2 cryptography instruction set
thumb
Enable Thumb instruction set (ARMv*T and ARMv6+)
thumb2
Enable Thumb-2 instruction set (ARMv*T2 and ARMv7+)
v4
Use instructions added in ARMv4
v5
Use instructions added in ARMv5
v6
Use instructions added in ARMv6
v7
Use instructions added in ARMv7
v8
Use instructions added in ARMv8
vfp
Use the VFP version 2 instruction set
vfp-d32
Indicate that the FPU has 32 64-bit VFP (v3+) registers (16 otherwise)
vfpv3
Use the VFP version 3 instruction set
vfpv4
Use the VFP version 4 instruction set