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-rw-r--r--riscv/insns/c_subw.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/riscv/insns/c_subw.h b/riscv/insns/c_subw.h
index 580f5b5..8099973 100644
--- a/riscv/insns/c_subw.h
+++ b/riscv/insns/c_subw.h
@@ -1,3 +1,3 @@
-require_extension('C');
+require_extension(EXT_ZCA);
require_rv64;
WRITE_RVC_RS1S(sext32(RVC_RS1S - RVC_RS2S));