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* amdgpu/math: Don't use llvm instrinsic for native_logJan Vesely2017-10-251-0/+5
AMDGPU targets don't have insturction for it, so it'll be expanded to C * log2 anyway. v2: use native_log2 instead of the more precise sw implementation v3: move to amdgpu v4: drop old AMD copyright Reviewer: Aaron Watry Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu> llvm-svn: 316587
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