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stdlib: An implementation of SDL_scalbn using ldexp() (thanks, Ozkan!).

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Fixes Bugzilla #3767.
This commit is contained in:
Ryan C. Gordon 2017-08-29 00:36:17 -04:00
parent a0cd7d6bce
commit 620f5342b5
1 changed files with 4 additions and 0 deletions
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4
src/stdlib/SDL_stdlib.c
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@ -187,6 +187,10 @@ SDL_scalbn(double x, int n)
return scalbn(x, n); return scalbn(x, n);
#elif defined(HAVE__SCALB) #elif defined(HAVE__SCALB)
return _scalb(x, n); return _scalb(x, n);
#elif defined(HAVE_LIBC) && defined(HAVE_FLOAT_H) && (FLT_RADIX == 2)
/* from scalbn(3): If FLT_RADIX equals 2 (which is
* usual), then scalbn() is equivalent to ldexp(3). */
return ldexp(x, n);
#else #else
return SDL_uclibc_scalbn(x, n); return SDL_uclibc_scalbn(x, n);
#endif /* HAVE_SCALBN */ #endif /* HAVE_SCALBN */