diff --git a/parser/common/parser_fp16_t.h b/parser/common/parser_fp16_t.h
index 191ef2a..c36e4ae 100644
--- a/parser/common/parser_fp16_t.h
+++ b/parser/common/parser_fp16_t.h
@@ -211,7 +211,7 @@ constexpr uint32_t kFp32MaxExp = 0xFFU;
 constexpr uint32_t kFp32MaxMan = 0x7FFFFFU;
 /// @ingroup fp32 special value judgment
 /// @brief   whether a fp32 is NaN
-inline bool FP32_IS_NAN(cons uint16_t x) {
+inline bool FP32_IS_NAN(const uint16_t x) {
     return ((((x) & kFp32ExpMask) == kFp32ExpMask) && ((x) & kFp32ManMask));
 }
 /// @ingroup fp32 special value judgment
@@ -637,7 +637,7 @@ T GetManSum(int16_t e_a, const T &m_a, int16_t e_b, const T &m_b) {
   T sum = 0;
   if (e_a != e_b) {
     T m_tmp = 0;
-    int16_t e_tmp = static_cast<int16_t>std::abs(e_a - e_b);
+    int16_t e_tmp = static_cast<int16_t>(std::abs(e_a - e_b));
     if (e_a > e_b) {
       m_tmp = m_b;
       m_tmp = RightShift(m_tmp, e_tmp);