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// vmsbc.vxm vd, vs2, rs1
VI_XI_LOOP_CARRY
({
auto &v0 = P.VU.elt<uint64_t>(0, midx);
const uint64_t mmask = UINT64_C(1) << mpos; \
const uint128_t op_mask = (UINT64_MAX >> (64 - sew));
uint64_t carry = insn.v_vm() == 0 ? (v0 >> mpos) & 0x1 : 0;
uint128_t res = (op_mask & vs2) - (op_mask & rs1) - carry;
carry = (res >> sew) & 0x1u;
vd = (vd & ~mmask) | ((carry << mpos) & mmask);
})
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