-if(RS2 == 0)
- RD = UINT64_MAX;
-else if(sreg_t(RS1) == INT64_MIN && sreg_t(RS2) == -1)
- RD = RS1;
+require_extension('M');
+sreg_t lhs = sext_xlen(RS1);
+sreg_t rhs = sext_xlen(RS2);
+if(rhs == 0)
+ WRITE_RD(UINT64_MAX);
+else if(lhs == INT64_MIN && rhs == -1)
+ WRITE_RD(lhs);
else
- RD = sext_xprlen(sext_xprlen(RS1) / sext_xprlen(RS2));
+ WRITE_RD(sext_xlen(lhs / rhs));