diff options
Diffstat (limited to 'newlib/libm/common/s_log2.c')
| -rw-r--r-- | newlib/libm/common/s_log2.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/newlib/libm/common/s_log2.c b/newlib/libm/common/s_log2.c index 7ad2cd88b..e5087858b 100644 --- a/newlib/libm/common/s_log2.c +++ b/newlib/libm/common/s_log2.c @@ -34,8 +34,8 @@ The Newlib implementations are not full, intrinisic calculations, but rather are derivatives based on <<log>>. (Accuracy might be slightly off from a direct calculation.) In addition to functions, they are also implemented as macros defined in math.h: -. #define log2(x) (log (x) / _M_LOG2_E) -. #define log2f(x) (logf (x) / (float) _M_LOG2_E) +. #define log2(x) (log (x) / _M_LN2) +. #define log2f(x) (logf (x) / (float) _M_LN2) To use the functions instead, just undefine the macros first. You can use the (non-ANSI) function <<matherr>> to specify error @@ -79,7 +79,7 @@ C99, POSIX, System V Interface Definition (Issue 6). double x; #endif { - return (log(x) / M_LOG2_E); + return (log(x) / M_LN2); } #endif /* defined(_DOUBLE_IS_32BITS) */ |