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emmansun / base64

Base64 with SIMD acceleration
https://godoc.org/github.com/emmansun/base64
BSD 3-Clause "New" or "Revised" License
3 stars 0 forks source link

s390x optimization #19

Open emmansun opened 4 hours ago

emmansun commented 4 hours ago
emmansun commented 2 hours ago

s390x中，如何实现类似VCMPGTUB/PCMPGTB指令的效果？

emmansun commented 2 hours ago

s390x中，如何实现类似VCMPGTUB/PCMPGTB指令的效果？

目前用了三条指令来模拟：

    VSB X0, RANGE0_END, X2
    VMXB NEG, X2, X2
    VMNB ZERO, X2, X2