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While the documentation for _BitScanReverse64 on MSDN says that it's
available on ARM, this isn't true. It's only available on ARM64. So
let's match reality.
Signed-off-by: Erik Faye-Lund <[email protected]>
Acked-by: Matt Turner <[email protected]>
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Otherwise we'll get errors such as
error: conflicting types for ‘ffs’
error: conflicting types for ‘ffsll’
We might want to improve the heuristics and provide a definition only
when a native one is missing. We can address that at a later stage.
Signed-off-by: Emil Velikov <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
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The functions are also useful for mesa.
Introduce src/util/bitscan.{h,c}. Move ffs function
implementations from src/mesa/main/imports.{h,c}.
Move bit scan related functions from
src/gallium/auxiliary/util/u_math.h. Merge platform
handling with what is available from within mesa.
v2: Try to fix MSVC compile.
Reviewed-by: Brian Paul <[email protected]>
Tested-by: Brian Paul <[email protected]>
Signed-off-by: Mathias Fröhlich <[email protected]>
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