[libc][NFC] Simplify FPBits expressions (#78590)

Author: gchatelet

libc/src/__support/FPUtil/aarch64/FEnvImpl.h

@@ -155,8 +155,8 @@ LIBC_INLINE int set_except(int excepts) {
 LIBC_INLINE int raise_except(int excepts) {
   float zero = 0.0f;
   float one = 1.0f;
-  float largeValue = float(FPBits<float>(FPBits<float>::MAX_NORMAL));
-  float smallValue = float(FPBits<float>(FPBits<float>::MIN_NORMAL));
+  float largeValue = FPBits<float>::max_normal();
+  float smallValue = FPBits<float>::min_normal();
   auto divfunc = [](float a, float b) {
     __asm__ __volatile__("ldr  s0, %0\n\t"
                          "ldr  s1, %1\n\t"

libc/src/__support/FPUtil/aarch64/fenv_darwin_impl.h

@@ -161,8 +161,8 @@ LIBC_INLINE int set_except(int excepts) {
 LIBC_INLINE int raise_except(int excepts) {
   float zero = 0.0f;
   float one = 1.0f;
-  float large_value = float(FPBits<float>(FPBits<float>::MAX_NORMAL));
-  float small_value = float(FPBits<float>(FPBits<float>::MIN_NORMAL));
+  float large_value = FPBits<float>::max_normal();
+  float small_value = FPBits<float>::min_normal();
   auto divfunc = [](float a, float b) {
     __asm__ __volatile__("ldr  s0, %0\n\t"
                          "ldr  s1, %1\n\t"

libc/src/__support/FPUtil/arm/FEnvImpl.h

@@ -135,8 +135,8 @@ LIBC_INLINE int set_except(int excepts) {
 LIBC_INLINE int raise_except(int excepts) {
   float zero = 0.0f;
   float one = 1.0f;
-  float large_value = float(FPBits<float>(FPBits<float>::MAX_NORMAL));
-  float small_value = float(FPBits<float>(FPBits<float>::MIN_NORMAL));
+  float large_value = FPBits<float>::max_normal();
+  float small_value = FPBits<float>::min_normal();
   auto divfunc = [](float a, float b) {
     __asm__ __volatile__("flds  s0, %0\n\t"
                          "flds  s1, %1\n\t"