softfloat: add float{32,64}_is_{de,}normal

This paves the way for upcoming work.
Reviewed-by: NBastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: NEmilio G. Cota <cota@braap.org>
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>

include/fpu/softfloat.h

@@ -464,6 +464,16 @@ static inline int float32_is_zero_or_denormal(float32 a)
     return (float32_val(a) & 0x7f800000) == 0;
 }
 
+static inline bool float32_is_normal(float32 a)
+{
+    return ((float32_val(a) + 0x00800000) & 0x7fffffff) >= 0x01000000;
+}
+
+static inline bool float32_is_denormal(float32 a)
+{
+    return float32_is_zero_or_denormal(a) && !float32_is_zero(a);
+}
+
 static inline float32 float32_set_sign(float32 a, int sign)
 {
     return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
@@ -605,6 +615,16 @@ static inline int float64_is_zero_or_denormal(float64 a)
     return (float64_val(a) & 0x7ff0000000000000LL) == 0;
 }
 
+static inline bool float64_is_normal(float64 a)
+{
+    return ((float64_val(a) + (1ULL << 52)) & -1ULL >> 1) >= 1ULL << 53;
+}
+
+static inline bool float64_is_denormal(float64 a)
+{
+    return float64_is_zero_or_denormal(a) && !float64_is_zero(a);
+}
+
 static inline float64 float64_set_sign(float64 a, int sign)
 {
     return make_float64((float64_val(a) & 0x7fffffffffffffffULL)