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| author | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
|---|---|---|
| committer | Vladimir Azarov <avm@intermediate-node.net> | 2024-10-01 15:47:05 +0200 |
| commit | 4abab5ad6c8465a7528ccdd5f49367da05f78bbd (patch) | |
| tree | ebf009bf1376a5a223a915bc27cbbd791a1316bc /src/math/copysign.c | |
Initial version
Diffstat (limited to 'src/math/copysign.c')
| -rw-r--r-- | src/math/copysign.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/math/copysign.c b/src/math/copysign.c new file mode 100644 index 0000000..b09331b --- /dev/null +++ b/src/math/copysign.c @@ -0,0 +1,8 @@ +#include "libm.h" + +double copysign(double x, double y) { + union {double f; uint64_t i;} ux={x}, uy={y}; + ux.i &= -1ULL/2; + ux.i |= uy.i & 1ULL<<63; + return ux.f; +} |