mirrors/musl
1
0
Fork 0
mirror of https://git.musl-libc.org/git/musl synced 2025-01-08 07:42:09 +03:00
Code Issues Packages Projects Releases Wiki Activity

write floating point limit constants to 21 significant decimal places

Browse Source 
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.
This commit is contained in:
Rich Felker 2013-11-20 17:40:33 -05:00
parent d8e8f1464c
commit 46db37289f
2 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/float.h
View File

@ -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)

4
include/math.h
View File

@ -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);