[CodeGen][CUDA] Fix bugs #5209
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[CodeGen][CUDA] Fix bugs #5209
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- Support vectorized casts - It is incorrect to extract elements from int8x4 with 0x000000ff & (x >> i * 8) as this value is of type int in C/C++. If this expression is used for sign extensions, the sign bit will be wrong. Simply use C style casts instead and sign bits will just work. Signed-off-by: Wei Pan <[email protected]>
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@vinx13 would be great if you can help to take a look |
vinx13
reviewed
Apr 2, 2020
| return CodeGenC::VisitExpr_(op, os); | ||
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| // We could emit make_float4 like calls, but the emitted code looks | ||
| // too compact to read. Emit this as vectorized unary ops. |
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is there any difference in performance?
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No, typical optimizations like mem2reg will promote temporary into registers and make them equivalent.
vinx13
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Apr 3, 2020
trevor-m
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Apr 16, 2020
- Support vectorized casts - It is incorrect to extract elements from int8x4 with 0x000000ff & (x >> i * 8) as this value is of type int in C/C++. If this expression is used for sign extensions, the sign bit will be wrong. Simply use C style casts instead and sign bits will just work. Signed-off-by: Wei Pan <[email protected]>
zhiics
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to neo-ai/tvm
that referenced
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Apr 17, 2020
- Support vectorized casts - It is incorrect to extract elements from int8x4 with 0x000000ff & (x >> i * 8) as this value is of type int in C/C++. If this expression is used for sign extensions, the sign bit will be wrong. Simply use C style casts instead and sign bits will just work. Signed-off-by: Wei Pan <[email protected]>
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Support vectorized casts
It is incorrect to extract elements from int8x4 with
0x000000ff & (x >> i * 8)
as this value is of type int in C/C++. If this expression
is used for sign extensions, the sign bit will be wrong.
Simply use C style casts instead and sign bits will just work.
Signed-off-by: Wei Pan [email protected]
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