diff options
| author | Ian Moffett <ian@osmora.org> | 2024-03-07 17:28:00 -0500 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2024-03-07 17:28:32 -0500 |
| commit | bd5969fc876a10b18613302db7087ef3c40f18e1 (patch) | |
| tree | 7c2b8619afe902abf99570df2873fbdf40a4d1a1 /lib/mlibc/options/ansi/musl-generic-math/scalbnl.c | |
| parent | a95b38b1b92b172e6cc4e8e56a88a30cc65907b0 (diff) | |
lib: Add mlibc
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/scalbnl.c')
| -rw-r--r-- | lib/mlibc/options/ansi/musl-generic-math/scalbnl.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/scalbnl.c b/lib/mlibc/options/ansi/musl-generic-math/scalbnl.c new file mode 100644 index 0000000..db44dab --- /dev/null +++ b/lib/mlibc/options/ansi/musl-generic-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 * 0x1p113L; + n += 16382 - 113; + if (n < -16382) { + x *= 0x1p-16382L * 0x1p113L; + n += 16382 - 113; + if (n < -16382) + n = -16382; + } + } + u.f = 1.0; + u.i.se = 0x3fff + n; + return x * u.f; +} +#endif |