среда, 22 июля 2026 г.

optimization of SASS stall counts

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Optimal instructions scheduling is NP-hard task. For this reason almost all compilers implement metaheuristic methods like list scheduling/G...
среда, 1 июля 2026 г.

identification of const bank0 params

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Official documentation doesn't disclose ConstBank0 ( c[0x0] ) memory layout used at the SASS level for kernel arguments and special regi...
вторник, 23 июня 2026 г.

RE of PTX grammar from ptxas, part 4

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Parts 1 , 2 & 3 First of all, it should be noted that the mask of instruction attributes has size 20 bytes, so I updated dump for them...
среда, 10 июня 2026 г.

recovering tokens from (f)lex generated code

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While doing some reverse engineering of ptxas I discovered that their lexer was generated by lex in fast mode (lex -f). Knowing that nvidi...
вторник, 2 июня 2026 г.

RE of PTX grammar from ptxas, part 3

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Parts 1 & 2 Pseudo instructions Surprise-surprise - some PTX instructions not mapped directly to underlying SASS 1:1. Instead they gene...
четверг, 28 мая 2026 г.

RE of PTX grammar from ptxas, part 2

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Part 1 PTX instructions that cicc cannot generate While reverse-engineering Nvidia's compilation pipeline, I extracted the set of PTX i...
воскресенье, 24 мая 2026 г.

RE of PTX grammar from ptxas

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Disclaimer Highly likely that author is an illiterate, inattentive, and incompetent lazy person with a poor imagination - therefore his hypo...