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Add a row_reduce primitive and migrate sum onto it (lesson 3, M3) - #124

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Sep 26, 2026

Commits on Sep 26, 2026

Add a row_reduce primitive and migrate sum onto it (lesson 3, M3)

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b936c2b
row_reduce: review nits (bound_iwork doc, rule width, index names, includes)

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46231be
Keep the retired CSR row-sum kernels and tile_int under old-code

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fa13a60
row_reduce: one position array in the sparse alloc instead of marker + col_to_pos

dance858
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75da34e
row_reduce: review cleanups (pd alloc map, memcpy fill, index names, sum axis hoist)

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f7c08c3