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use faster vqtbl1q_u8 on ARM64

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This commit is contained in:
Ahmet Inan 2023-05-05 08:37:13 +02:00
commit 2b7645ced3
2 changed files with 13 additions and 1 deletions
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6
rotate.hh
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@ -51,11 +51,15 @@ public:
{
if (s < 0)
s += WIDTH;
TYPE ret;
#ifdef __aarch64__
ret.m = vqtbl1q_s8(a.m, vunsigned(rot[s]).m);
#else
int8x8x2_t b { vget_low_s8(a.m), vget_high_s8(a.m) };
int8x8_t c = vtbl2_s8(b, vget_low_s8(rot[s].m));
int8x8_t d = vtbl2_s8(b, vget_high_s8(rot[s].m));
TYPE ret;
ret.m = vcombine_s8(c, d);
#endif
return ret;
}
};