[ 源代码： isa-support ]
软件包：vfpv2-support（21）
CPU feature checking - require VFPv2
The packages in the isa-support family probe for microprocessor Instruction Set Architecture features such as SSE3. By refusing to install on machines lacking a required feature, they allow ISA requirements to be handled in terms of package dependencies.
This is a mostly dummy package which checks for VFPv2 and refuses to install on unsupported hardware.
VFP (Vector Floating Point) technology is a floating-point unit (FPU) coprocessor extension to the ARM architecture. It provides single- and double-precision floating-point computation fully compliant with IEEE 754-1985.
VFPv2 has 16 64-bit FPU registers. It is available for some ARMv5 and all ARMv6 cores.