[2026春季][T1-1-1] Ifelseer#90
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Implemented using NineToothed DSL with libdevice functions:
- copysign: Copy sign from y to absolute value of x
- gcd: Greatest common divisor using Euclidean algorithm (64 iterations)
- lcm: Least common multiple using gcd-based formula
- nextafter: Next representable floating-point value toward y
- lgamma: Natural logarithm of gamma function
All operators include:
- Kernel implementation (src/ntops/kernels/)
- PyTorch interface (src/ntops/torch/)
- Comprehensive tests (tests/)
- Performance reports (reports/)
Tested with float32 and float16 types, covering edge cases.
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