[Frontend] Implement special and random operations - #307

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PSAL-POSTECH:developfrom

jyshin1201:feature/special-ops-new

Commits on Jul 30, 2026

[Frontend] Implement lgamma with Lanczos approximation
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[Frontend] Implement erfinv via the Giles polynomial approximation
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[Frontend] Implement frexp as an aten decomposition
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[Frontend] Implement nextafter with a single-ulp integer step
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[Frontend] Implement rand, randn and randint64 on Philox4_32-10
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[Frontend] Wire ops.load_seed through the kernel load path
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[Frontend] Fix lgamma poles, erfinv at |x| == 1 and the f16 paths
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Commits on Jul 31, 2026

[Frontend] Harden special ops implementations and tests
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