뒤에 붙는 D32 D16 F16은 다시 자세히 보니
Double / Float 와 몇개의 레지스터를 가지나 숫자를 표현한 듯?
VFPv1 Obsolete VFPv2 An optional extension to the ARM instruction set in the ARMv5TE, ARMv5TEJ and ARMv6 architectures. VFPv2 has 16 64bit FPU registers. VFPv3 or VFPv3-D32 Implemented on most Cortex-A8 and A9 ARMv7 processors. It is backwards compatible with VFPv2, except that it cannot trap floating-point exceptions. VFPv3 has 32 64bit FPU registers as standard, adds VCVT instructions to convert between scalar, float and double, adds immediate mode to VMOV such that constants can be loaded into FPU registers. VFPv3-D16 As above, but with only 16 64-bit FPU registers. Implemented on Cortex-R4 and R5 processors and the Tegra 2 (Cortex-A9). VFPv3-F16 Uncommon; it supports IEEE754-2008 half-precision (16-bit) floating point as a storage format. VFPv4 or VFPv4-D32 Implemented on Cortex-A12 and A15 ARMv7 processors, Cortex-A7 optionally has VFPv4-D32 in the case of an FPU with Neon.[110] VFPv4 has 32 64-bit FPU registers as standard, adds both half-precision support as a storage format and fused multiply-accumulate instructions to the features of VFPv3. VFPv4-D16 As above, but it has only 16 64-bit FPU registers. Implemented on Cortex-A5 and A7 processors in the case of an FPU without Neon.[110] VFPv5-D16-M Implemented on Cortex-M7 when single and double-precision floating-point core option exists. |
[링크 : https://en.wikipedia.org/wiki/ARM_architecture]
[링크 : https://wiki.debian.org/ArmHardFloatPort/VfpComparison]
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