[gfx1250][gemm] Add PTPC FP8/A8W4, non-tile-aligned M, and strided A/C support#649

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gfx1250/gemm_ptpc

Commits on Jun 6, 2026

feat: add ptpc fp8, a8w4 gemm

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optimize ptpc epilogue vgpr prefetch

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ptpc use no-scale wmma for compatibility

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mxscale/ptpc a8w4 use latest fp8 scheduler

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add M out-of-bounds support (non-tile-aligned M, no host padding)

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[gemm_fp8fp4_gfx1250] auto-select m_oob output clip; drop m_oob_store

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Remove m_oob_clip flag: non-tile-aligned M is now the default GEMM path

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Commits on Jun 7, 2026

ptpc: set scale buffer num_records from runtime M/N to keep OOB clipping

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gemm_fp8fp4_gfx1250: add runtime lda/ldc strides for strided A/C; drop compile-time M

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