compiler-rt: fix few builtins build warnings. (#88991)

Author: devnexen

compiler-rt/lib/builtins/fp_add_impl.inc

@@ -91,7 +91,7 @@ static __inline fp_t __addXf3__(fp_t a, fp_t b) {
 
   // Shift the significand of b by the difference in exponents, with a sticky
   // bottom bit to get rounding correct.
-  const unsigned int align = aExponent - bExponent;
+  const unsigned int align = (unsigned int)(aExponent - bExponent);
   if (align) {
     if (align < typeWidth) {
       const bool sticky = (bSignificand << (typeWidth - align)) != 0;

compiler-rt/lib/builtins/fp_fixint_impl.inc

@@ -34,7 +34,7 @@ static __inline fixint_t __fixint(fp_t a) {
   // If 0 <= exponent < significandBits, right shift to get the result.
   // Otherwise, shift left.
   if (exponent < significandBits)
-    return sign * (significand >> (significandBits - exponent));
+    return (fixint_t)(sign * (significand >> (significandBits - exponent)));
   else
-    return sign * ((fixuint_t)significand << (exponent - significandBits));
+    return (fixint_t)(sign * ((fixuint_t)significand << (exponent - significandBits)));
 }

compiler-rt/lib/builtins/fp_lib.h

@@ -43,8 +43,8 @@ static __inline int rep_clz(rep_t a) { return clzsi(a); }
 // 32x32 --> 64 bit multiply
 static __inline void wideMultiply(rep_t a, rep_t b, rep_t *hi, rep_t *lo) {
   const uint64_t product = (uint64_t)a * b;
-  *hi = product >> 32;
-  *lo = product;
+  *hi = (rep_t)(product >> 32);
+  *lo = (rep_t)product;
 }
 COMPILER_RT_ABI fp_t __addsf3(fp_t a, fp_t b);
 
@@ -239,7 +239,7 @@ static __inline int normalize(rep_t *significand) {
   return 1 - shift;
 }
 
-static __inline void wideLeftShift(rep_t *hi, rep_t *lo, int count) {
+static __inline void wideLeftShift(rep_t *hi, rep_t *lo, unsigned int count) {
   *hi = *hi << count | *lo >> (typeWidth - count);
   *lo = *lo << count;
 }

compiler-rt/lib/builtins/int_types.h

@@ -107,8 +107,8 @@ typedef union {
 
 static __inline ti_int make_ti(di_int h, di_int l) {
   twords r;
-  r.s.high = h;
-  r.s.low = l;
+  r.s.high = (du_int)h;
+  r.s.low = (du_int)l;
   return r.all;
 }