Vectorize Ramp in OpenGLCompute backend#6372
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dsharletg merged 1 commit intohalide:masterfrom Nov 3, 2021
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Currently, ramps are generated as a number of independent scalar expressions that are finally gathered into a vector. For instance, indexing in vectorized code is filled with ramps like the following: ``` int _11 = int(1) * int(1); int _12 = _10 + _11; int _13 = int(2) * int(1); int _14 = _10 + _13; int _15 = int(3) * int(1); int _16 = _10 + _15; ivec4 _17 = ivec4(_10, _12, _14, _16); ``` This patch simplifies the generated code using a multiply add expression on a vector containing an arithmetic expression, such that the code is as follows: ``` ivec4 _11 = ivec4(0, 1, 2, 3) * int(1) + _10; ``` This is more performant due to vectorization, more compact, and more readable because the base and the stride are easily identifiable.
dsharletg
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Nov 3, 2021
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Thanks, this makes sense and is a nice change. |
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Currently, ramps are generated as a number of independent scalar
expressions that are finally gathered into a vector. For instance,
indexing in vectorized code is filled with ramps like the following:
This patch simplifies the generated code using a multiply add expression
on a vector containing an arithmetic sequence, such that the code is
as follows:
This is more performant due to vectorization, more compact, and more
readable because the base and the stride are easily identifiable.