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authorRich Felker <dalias@aerifal.cx>2013-11-20 17:40:33 -0500
committerRich Felker <dalias@aerifal.cx>2013-11-20 17:40:33 -0500
commit46db37289f917e23877a0e0df88cbb150805bc97 (patch)
treee39e35854721b6912e3484207aeba5991dbc9ed6
parentd8e8f1464cb02d6a62f01c7153ca4d7b0cd5c5e6 (diff)
downloadmusl-46db37289f917e23877a0e0df88cbb150805bc97.tar.gz
write floating point limit constants to 21 significant decimal places
this is enough to produce the correct value even if the constant is interpreted as 80-bit extended precision, which matters on archs with excess precision (FLT_EVAL_METHOD==2) under at least some interpretations of the C standard. the shorter representations, while correct if converted to the nominal precision at translation time, could produce an incorrect value at extended precision, yielding results such as (double)DBL_MAX != DBL_MAX.
-rw-r--r--include/float.h16
-rw-r--r--include/math.h4
2 files changed, 10 insertions, 10 deletions
diff --git a/include/float.h b/include/float.h
index c7b208af..2b2ad399 100644
--- a/include/float.h
+++ b/include/float.h
@@ -3,10 +3,10 @@
#define FLT_RADIX 2
-#define FLT_TRUE_MIN 1.40129846e-45F
-#define FLT_MIN 1.17549435e-38F
-#define FLT_MAX 3.40282347e+38F
-#define FLT_EPSILON 1.19209290e-07F
+#define FLT_TRUE_MIN 1.40129846432481707092e-45F
+#define FLT_MIN 1.17549435082228750797e-38F
+#define FLT_MAX 3.40282346638528859812e+38F
+#define FLT_EPSILON 1.1920928955078125e-07F
#define FLT_MANT_DIG 24
#define FLT_MIN_EXP (-125)
@@ -16,10 +16,10 @@
#define FLT_MIN_10_EXP (-37)
#define FLT_MAX_10_EXP 38
-#define DBL_TRUE_MIN 4.9406564584124654e-324
-#define DBL_MIN 2.2250738585072014e-308
-#define DBL_MAX 1.7976931348623157e+308
-#define DBL_EPSILON 2.2204460492503131e-16
+#define DBL_TRUE_MIN 4.94065645841246544177e-324
+#define DBL_MIN 2.22507385850720138309e-308
+#define DBL_MAX 1.79769313486231570815e+308
+#define DBL_EPSILON 2.22044604925031308085e-16
#define DBL_MANT_DIG 53
#define DBL_MIN_EXP (-1021)
diff --git a/include/math.h b/include/math.h
index dc176012..3c2105ef 100644
--- a/include/math.h
+++ b/include/math.h
@@ -349,7 +349,7 @@ long double truncl(long double);
#if defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE)
#undef MAXFLOAT
-#define MAXFLOAT 3.40282347e+38F
+#define MAXFLOAT 3.40282346638528859812e+38F
#endif
#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
@@ -379,7 +379,7 @@ double yn(int, double);
#endif
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define HUGE 3.40282347e+38F
+#define HUGE 3.40282346638528859812e+38F
double scalb(double, double);
float scalbf(float, float);