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.
