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vadiklyutiy
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Dec 19, 2024
- add a primitive of exp2 for float types. This primitive could be useful when optimizing the flash attention. Specifically, flash attention rewrites the exponential function as ``` # log2_e = 1.44269504 exp(a) = exp2(a * log2_e) ``` The transformation can hint the nvcc compiler to generate better code (more ffma instructions instead of fmuls and fadds) . --------- Co-authored-by: xiaocenxiaocen <xiao.zhang@centml.ai>
vadiklyutiy
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Dec 20, 2024
- add a primitive of exp2 for float types. This primitive could be useful when optimizing the flash attention. Specifically, flash attention rewrites the exponential function as ``` # log2_e = 1.44269504 exp(a) = exp2(a * log2_e) ``` The transformation can hint the nvcc compiler to generate better code (more ffma instructions instead of fmuls and fadds) . --------- Co-authored-by: xiaocenxiaocen <xiao.zhang@centml.ai>
vadiklyutiy
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Dec 26, 2024
- add a primitive of exp2 for float types. This primitive could be useful when optimizing the flash attention. Specifically, flash attention rewrites the exponential function as ``` # log2_e = 1.44269504 exp(a) = exp2(a * log2_e) ``` The transformation can hint the nvcc compiler to generate better code (more ffma instructions instead of fmuls and fadds) . --------- Co-authored-by: xiaocenxiaocen <xiao.zhang@centml.ai>
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