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Fix 10 bugs in BF16 XQA MLA kernel for SM120/SM121 #2689

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Fix 10 bugs in BF16 XQA MLA kernel for SM120/SM121 #2689

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f218d52
Support BF16 MLA on SM120 with shared-mem fallback
maomao123321 Mar 3, 2026
c8d017f
Fix 10 bugs in BF16 XQA MLA kernel for SM120/SM121
blake-snc Mar 4, 2026
242b3db
Address review feedback: simplify ternaries, deduplicate smem config,…
blake-snc Mar 4, 2026
177b984
Address review comments: SM12x guard, remove duplicate init, add swiz…
blake-snc Mar 5, 2026
a961520
fix hardcoded device 0 in configureKernel()
blake-snc Mar 5, 2026
80a5e14
use is_sm12x_supported() for SM12x capability checks
blake-snc Mar 5, 2026
3f82fdb
include CUDA version requirements in SM12x error messages
blake-snc Mar 5, 2026
eac68a6
ci: retrigger CI after infrastructure failures
blake-snc Mar 24, 2026
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5 changes: 5 additions & 0 deletions csrc/xqa/defines.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,8 +36,13 @@
#define IS_MLA (HEAD_GRP_SIZE == 128 && HEAD_ELEMS == 576)

#if IS_MLA
#if defined(MLA_BF16) && MLA_BF16
#define INPUT_ELEM __nv_bfloat16
#define INPUT_ELEM2 __nv_bfloat162
#else
#define INPUT_ELEM __nv_fp8_e4m3
#define INPUT_ELEM2 __nv_fp8x2_e4m3
#endif
#define HEAD_ELEMS_V 512
#else
// 1 means fp16 and 0 means bf16 input/output
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