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Mouad-Scriptz-0andClaude Fable 5.1
0a9ee3698a
NVIDIA's compiler predicates a branched LDS load at no cost, while the selected form costs about 2.5 instructions per dword and splits a ds_read_b128 into four loads (RTX 4060 measurements by @karanvora2599 in loads therefore keep the branch of main, in workgroup, function and device memory alike, and the sentinel dword that only they read goes away: the LDS array is the program's dwords plus the lock again, and the device-memory decision reserves the lock alone. The sentinel budget tests become lock budget tests at that boundary, and the guarded-load test pins the branch. Co-Authored-By: Claude Fable 5.1 <[email protected]>