diff options
Diffstat (limited to 'lib/mlibc/options/ansi/musl-generic-math/fmod.c')
-rw-r--r-- | lib/mlibc/options/ansi/musl-generic-math/fmod.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/lib/mlibc/options/ansi/musl-generic-math/fmod.c b/lib/mlibc/options/ansi/musl-generic-math/fmod.c deleted file mode 100644 index 6849722..0000000 --- a/lib/mlibc/options/ansi/musl-generic-math/fmod.c +++ /dev/null @@ -1,68 +0,0 @@ -#include <math.h> -#include <stdint.h> - -double fmod(double x, double y) -{ - union {double f; uint64_t i;} ux = {x}, uy = {y}; - int ex = ux.i>>52 & 0x7ff; - int ey = uy.i>>52 & 0x7ff; - int sx = ux.i>>63; - uint64_t i; - - /* in the followings uxi should be ux.i, but then gcc wrongly adds */ - /* float load/store to inner loops ruining performance and code size */ - uint64_t uxi = ux.i; - - if (uy.i<<1 == 0 || isnan(y) || ex == 0x7ff) - return (x*y)/(x*y); - if (uxi<<1 <= uy.i<<1) { - if (uxi<<1 == uy.i<<1) - return 0*x; - return x; - } - - /* normalize x and y */ - if (!ex) { - for (i = uxi<<12; i>>63 == 0; ex--, i <<= 1); - uxi <<= -ex + 1; - } else { - uxi &= -1ULL >> 12; - uxi |= 1ULL << 52; - } - if (!ey) { - for (i = uy.i<<12; i>>63 == 0; ey--, i <<= 1); - uy.i <<= -ey + 1; - } else { - uy.i &= -1ULL >> 12; - uy.i |= 1ULL << 52; - } - - /* x mod y */ - for (; ex > ey; ex--) { - i = uxi - uy.i; - if (i >> 63 == 0) { - if (i == 0) - return 0*x; - uxi = i; - } - uxi <<= 1; - } - i = uxi - uy.i; - if (i >> 63 == 0) { - if (i == 0) - return 0*x; - uxi = i; - } - for (; uxi>>52 == 0; uxi <<= 1, ex--); - - /* scale result */ - if (ex > 0) { - uxi -= 1ULL << 52; - uxi |= (uint64_t)ex << 52; - } else { - uxi >>= -ex + 1; - } - uxi |= (uint64_t)sx << 63; - ux.i = uxi; - return ux.f; -} |