diff options
Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/wtf')
-rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h index 9ea57fd..a18949e 100644 --- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h +++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/MathExtras.h @@ -98,12 +98,25 @@ inline bool signbit(double x) { struct ieee_double *p = (struct ieee_double *)&x #if COMPILER(MSVC) || COMPILER(RVCT) -inline long long llround(double num) { return static_cast<long long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); } -inline long long llroundf(float num) { return static_cast<long long>(num > 0 ? num + 0.5f : ceil(num - 0.5f)); } -inline long lround(double num) { return static_cast<long>(num > 0 ? num + 0.5 : ceil(num - 0.5)); } -inline long lroundf(float num) { return static_cast<long>(num > 0 ? num + 0.5f : ceilf(num - 0.5f)); } -inline double round(double num) { return num > 0 ? floor(num + 0.5) : ceil(num - 0.5); } -inline float roundf(float num) { return num > 0 ? floorf(num + 0.5f) : ceilf(num - 0.5f); } +// We must not do 'num + 0.5' or 'num - 0.5' because they can cause precision loss. +static double round(double num) +{ + double integer = ceil(num); + if (num > 0) + return integer - num > 0.5 ? integer - 1.0 : integer; + return integer - num >= 0.5 ? integer - 1.0 : integer; +} +static float roundf(float num) +{ + float integer = ceilf(num); + if (num > 0) + return integer - num > 0.5f ? integer - 1.0f : integer; + return integer - num >= 0.5f ? integer - 1.0f : integer; +} +inline long long llround(double num) { return static_cast<long long>(round(num)); } +inline long long llroundf(float num) { return static_cast<long long>(roundf(num)); } +inline long lround(double num) { return static_cast<long>(round(num)); } +inline long lroundf(float num) { return static_cast<long>(roundf(num)); } inline double trunc(double num) { return num > 0 ? floor(num) : ceil(num); } #endif |