math: enable __ieee754_remainder[f], __ieee754_fmod[f] for Xtensa

Author: igrr

newlib/libm/math/e_fmod.c

@@ -18,7 +18,7 @@
 /* __ieee754_remainder is provided by libgcc and presumably is faster
    then original implementation */
 
-#if 1
+#ifndef __XTENSA__
 
 extern double __ieee754_remainder(double x, double y);
 

newlib/libm/math/e_remainder.c

@@ -26,7 +26,7 @@
 
 /* __ieee754_remainder is provided by libgcc */
 
-#if 0
+#ifdef __XTENSA__
 
 #ifdef __STDC__
 static const double zero = 0.0;
@@ -81,6 +81,6 @@ static double zero = 0.0;
 	return x;
 }
 
-#endif
+#endif /* __XTENSA__ */
 
 #endif /* defined(_DOUBLE_IS_32BITS) */

newlib/libm/math/ef_fmod.c

@@ -18,7 +18,7 @@
 /* __ieee754_remainderf is provided by libgcc and presumably is faster
    then original implementation */
 
-#if 0
+#ifndef __XTENSA__
 
 extern float __ieee754_remainderf(float x, float y);
 

newlib/libm/math/ef_remainder.c

@@ -17,7 +17,7 @@
 
 /* __ieee754_remainderf is provided by libgcc */
 
-#if 0
+#ifdef __XTENSA__
 
 #ifdef __STDC__
 static const float zero = 0.0;
@@ -71,4 +71,4 @@ static float zero = 0.0;
 	return x;
 }
 
-#endif /* 0 */
+#endif /* __XTENSA__ */