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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/scalbnf.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/scalbnf.c')
| -rw-r--r-- | system/lib/libc/musl/src/math/scalbnf.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/math/scalbnf.c b/system/lib/libc/musl/src/math/scalbnf.c new file mode 100644 index 00000000..0b62c3c7 --- /dev/null +++ b/system/lib/libc/musl/src/math/scalbnf.c @@ -0,0 +1,31 @@ +#include <math.h> +#include <stdint.h> + +float scalbnf(float x, int n) +{ + union {float f; uint32_t i;} u; + float_t y = x; + + if (n > 127) { + y *= 0x1p127f; + n -= 127; + if (n > 127) { + y *= 0x1p127f; + n -= 127; + if (n > 127) + n = 127; + } + } else if (n < -126) { + y *= 0x1p-126f; + n += 126; + if (n < -126) { + y *= 0x1p-126f; + n += 126; + if (n < -126) + n = -126; + } + } + u.i = (uint32_t)(0x7f+n)<<23; + x = y * u.f; + return x; +} |