Yeah, they're compound but don't have to be serial, due to the VPMIN/VPMAX instructions, but definitely much nicer on x86. For instance: int all(uint32x4_t v

Yeah, they're compound but don't have to be serial, due to the VPMIN/VPMAX instructions, but definitely much nicer on x86. For instance: int all(uint32x4_t v) { uint32x2_t x = vpmin_u32(vget_low_u32(v), vget_high_u32(v)); uint32x2_t y = vpmin_u32(x, x); return y[0] != 0; } (You can get away with a single UMINV/UMAXV on AArch64.)