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-rw-r--r--riscv/isa_parser.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/riscv/isa_parser.cc b/riscv/isa_parser.cc
index 6aeee14..4fc53f7 100644
--- a/riscv/isa_parser.cc
+++ b/riscv/isa_parser.cc
@@ -157,7 +157,7 @@ isa_parser_t::isa_parser_t(const char* str, const char *priv)
extension_table[EXT_ZCB] = true;
extension_table[EXT_ZCMT] = true;
extension_table[EXT_ZCMP] = true;
- if (extension_table['F'])
+ if (extension_table['F'] && max_xlen == 32)
extension_table[EXT_ZCF] = true;
} else if (ext_str == "zca") {
extension_table[EXT_ZCA] = true;