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require_rv64;
require_extension(EXT_ZPN);
reg_t sa = insn.p_imm5();
if (sa != 0) {
WRITE_RD(sext32(((P_SW(RS1, 0) >> (sa - 1)) + 1) >> 1));
} else {
WRITE_RD(sext32(P_SW(RS1, 0)));
}
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