add FLT_MAX, FLT_EPSILON, NAN, and HUGE_VALF to MSL_C headers (#316)

include/MSL_C/MSL_Common/Src/float.h

@@ -21,6 +21,11 @@
 // TODO: OK?
 #define __signbitd(x) ((*(unsigned char*)&(x)) & 0x80)
 
+extern unsigned long __float_nan[];
+extern unsigned long __float_huge[];
+extern unsigned long __float_max[];
+extern unsigned long __float_epsilon[];
+
 inline int __fpclassifyf(float __value) {
     unsigned long integer = *(unsigned long*)&__value;
 

include/MSL_C/float.h

@@ -0,0 +1,10 @@
+
+#ifndef MSL_FLOAT_H_
+#define MSL_FLOAT_H_
+
+#include "MSL_C/MSL_Common/Src/float.h"
+
+#define FLT_MAX (*(float*) __float_max)
+#define FLT_EPSILON (*(float*) __float_epsilon)
+
+#endif

include/MSL_C/math.h

@@ -3,6 +3,9 @@
 
 #include "MSL_C/MSL_Common/Src/float.h"
 
+#define NAN (*(float*) __float_nan)
+#define HUGE_VALF (*(float*) __float_huge)
+
 #define M_PI 3.14159265358979323846f
 
 #define DEG_TO_RAD(degrees) (degrees * (M_PI / 180.0f))
@@ -50,10 +53,6 @@ double sqrt(double);
 double tan(double);
 float tanf(float);
 
-extern float __float_nan[4];
-extern float __float_epsilon[4];
-extern float __float_max[4];
-
 inline double sqrt_step(double tmpd, float mag) {
     return tmpd * 0.5 * (3.0 - mag * (tmpd * tmpd));
 }
@@ -66,9 +65,9 @@ inline float sqrtf(float mag) {
         tmpd = sqrt_step(tmpd, mag);
         return mag * tmpd;
     } else if (mag < 0.0) {
-        return __float_nan[0];
+        return NAN;
     } else if (fpclassify(mag) == 1) {
-        return __float_nan[0];
+        return NAN;
     } else {
         return mag;
     }

include/dol2asm.h

@@ -80,10 +80,8 @@
 #define _HUGE_ENUF 1e+300
 #define INFINITY ((float)(_HUGE_ENUF * _HUGE_ENUF))
 #define HUGE_VAL ((double)INFINITY)
-#define HUGE_VALF ((float)INFINITY)
 #define HUGE_VALL ((long double)INFINITY)
 
-#define FLOAT_INF HUGE_VALF
 #define DOUBLE_INF HUGE_VAL
 
 #pragma section ".dead"