Ever wonder what these "features" (hardware capabilities) in ARM Linux's
/proc/cpuinfo mean ?
Here is the answer (from Linux kernel source
file
arch/arm/include/asm/hwcap.h):
| 26bit | Program Counter is 26-bit long |
crunch | MaverickCrunch instructoin extension. Now obsolete. |
edsp | DSP Enhancement instructions |
fastmult | Fast multiplication |
fpa | Floating Point Accelerator instructions. Now obsolete. |
half | ? |
idiv | Integer divide instructions available in both ARM and Thumb |
idiva | Integer divide instructions available in ARM only |
idivt | Integer divide instructions available in Thumb only |
iwmmxt | Intel Wireless MMX Technology, an implementation of MMX on embedded processors. |
java | Jazelle technology |
neon | NEON SIMD instructions |
swp | SWP (SWaP) instruction, which is used to implement a binary semaphore (mutex) |
thumb | Thumb instructions |
| thumbee | Thumb Execution Environment |
| tls | Thread local storage |
vfp | Vector Floating Point instruction extension |
vfpv3 | Vector Floating Point instruction extension version 3, with 32 double-precision registers |
vfpv3d16 | Vector Floating Point instruction extension version 3, with 16 double-precision registers |
vfpv4 | Vector Floating Point instruction extension version 4 |
Also, check
this link.
