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| author | Alon Zakai <alonzakai@gmail.com> | 2014-01-13 16:55:19 -0800 |
|---|---|---|
| committer | Alon Zakai <alonzakai@gmail.com> | 2014-01-13 16:56:03 -0800 |
| commit | cd1edebb5034ea52396a5b68304e84ae80878740 (patch) | |
| tree | 6a6f8364ea74985d11c4f6ff74e5b80e08dc849d /system/lib/libc/musl/src/math/scalbnl.c | |
| parent | af59788f8b7b76515e36bee1bf66edf497b801db (diff) | |
| parent | 2914deb17f3857bb02eeec87a58a3ed6d4a8853a (diff) | |
Merge branch 'incoming' of github.com:kripken/emscripten into incoming1.8.8
conflicts: tests/test_core.py tools/shared.py
Diffstat (limited to 'system/lib/libc/musl/src/math/scalbnl.c')
| -rw-r--r-- | system/lib/libc/musl/src/math/scalbnl.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/math/scalbnl.c b/system/lib/libc/musl/src/math/scalbnl.c new file mode 100644 index 00000000..08a4c587 --- /dev/null +++ b/system/lib/libc/musl/src/math/scalbnl.c @@ -0,0 +1,36 @@ +#include "libm.h" + +#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 +long double scalbnl(long double x, int n) +{ + return scalbn(x, n); +} +#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 +long double scalbnl(long double x, int n) +{ + union ldshape u; + + if (n > 16383) { + x *= 0x1p16383L; + n -= 16383; + if (n > 16383) { + x *= 0x1p16383L; + n -= 16383; + if (n > 16383) + n = 16383; + } + } else if (n < -16382) { + x *= 0x1p-16382L; + n += 16382; + if (n < -16382) { + x *= 0x1p-16382L; + n += 16382; + if (n < -16382) + n = -16382; + } + } + u.f = 1.0; + u.i.se = 0x3fff + n; + return x * u.f; +} +#endif |