more fixes

Author: vinay-deshmukh

libc/src/__support/FPUtil/FPBits.h

@@ -251,7 +251,7 @@ template <FPType fp_type> struct FPStorage : public FPLayout<fp_type> {
 
     // Cast operator to get convert from BiasedExponent to Exponent.
     LIBC_INLINE constexpr operator Exponent() const {
-      return Exponent(UP::value - EXP_BIAS);
+      return Exponent(static_cast<int32_t>(UP::value - EXP_BIAS));
     }
 
     LIBC_INLINE constexpr BiasedExponent &operator++() {

libc/src/__support/FPUtil/NormalFloat.h

@@ -16,6 +16,7 @@
 #include "src/__support/macros/config.h"
 
 #include <stdint.h>
+#include <sys/_types/_int32_t.h>
 
 namespace LIBC_NAMESPACE_DECL {
 namespace fputil {
@@ -105,7 +106,7 @@ template <typename T> struct NormalFloat {
 
     constexpr int SUBNORMAL_EXPONENT = -FPBits<T>::EXP_BIAS + 1;
     if (exponent < SUBNORMAL_EXPONENT) {
-      unsigned shift = SUBNORMAL_EXPONENT - exponent;
+      unsigned shift = static_cast<unsigned>(SUBNORMAL_EXPONENT - exponent);
       // Since exponent > subnormalExponent, shift is strictly greater than
       // zero.
       if (shift <= FPBits<T>::FRACTION_LEN + 1) {
@@ -160,7 +161,7 @@ template <typename T> struct NormalFloat {
     if (bits.is_subnormal()) {
       unsigned shift = evaluate_normalization_shift(bits.get_mantissa());
       mantissa = static_cast<StorageType>(bits.get_mantissa() << shift);
-      exponent = 1 - FPBits<T>::EXP_BIAS - shift;
+      exponent = 1 - FPBits<T>::EXP_BIAS - static_cast<int32_t>(shift);
     } else {
       exponent = bits.get_biased_exponent() - FPBits<T>::EXP_BIAS;
       mantissa = ONE | bits.get_mantissa();

libc/src/__support/str_to_integer.h

@@ -96,7 +96,7 @@ strtointeger(const char *__restrict src, int base,
   if (base < 0 || base == 1 || base > 36)
     return {0, 0, EINVAL};
 
-  src_cur = first_non_whitespace(src, src_len) - src;
+  src_cur = static_cast<size_t>(first_non_whitespace(src, src_len) - src);
 
   char result_sign = '+';
   if (src[src_cur] == '+' || src[src_cur] == '-') {