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-rw-r--r--riscv/insns/fclass_d.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/riscv/insns/fclass_d.h b/riscv/insns/fclass_d.h
index 9456123..a355062 100644
--- a/riscv/insns/fclass_d.h
+++ b/riscv/insns/fclass_d.h
@@ -1,3 +1,3 @@
-require_extension('D');
+require_either_extension('D', EXT_ZDINX);
require_fp;
-WRITE_RD(f64_classify(f64(FRS1)));
+WRITE_RD(f64_classify(FRS1_D));