diff --git a/include/float.h b/include/float.h
index bf56581..4f30a05 100644
--- a/include/float.h
+++ b/include/float.h
@@ -12,7 +12,11 @@
 #ifndef _FLOAT_H
 #define _FLOAT_H
 
-#define FLT_ROUNDS 1
+#if __STDC_HOSTED__
+#define FLT_ROUNDS -1 /* This needs to reflect fesetround() in <fenv.h> */
+#else
+#define FLT_ROUNDS 1 /* For freestanding, just round to nearest */
+#endif
 
 #define FLT_EVAL_METHOD 0
 
@@ -22,14 +26,38 @@
 #define DBL_MANT_DIG 53
 #define LDBL_MANT_DIG 113
 
-#define DECIMAL_DIG 10
+#define DECIMAL_DIG 17
 
 #define FLT_DIG 6
-#define DBL_DIG 10
+#define DBL_DIG 15
 #define LDBL_DIG 10
 
+#define FLT_MIN_EXP -125
+#define DBL_MIN_EXP -1021
+#define LDBL_MIN_EXP -120
+
+#define FLT_MAX_EXP +128
+#define DBL_MAX_EXP +1024
+#define LDBL_MAX_EXP +122
+
 #define FLT_MIN_10_EXP -37
-#define DBL_MIN_10_EXP -37
+#define DBL_MIN_10_EXP -307
 #define LDBL_MIN_10_EXP -37
 
+#define FLT_MAX_10_EXP +38
+#define DBL_MAX_10_EXP +308
+#define LDBL_MAX_10_EXP +37
+
+#define FLT_MAX 3.40282347E+38F
+#define DBL_MAX 1.7976931348623157E+308
+#define LDBL_MAX 1E+37
+
+#define FLT_EPSILON 1.19209290E-07F
+#define DBL_EPSILON 2.2204460492503131E-16
+#define LDBL_EPSILON 1E-9
+
+#define FLT_MIN 1.17549435E-38F
+#define DBL_MIN 2.2250738585072014E-308
+#define LDBL_MIN 1E-37
+
 #endif