Hello, Zhihong. Thanks for your comments.
1. I am afraid that an equivalence of "floor(val + 0.5)" to "cell(val)" is incorrect: "floor(2.1 + 0.5)" returns 2 while "cell(2.1)" returns 3. We can’t use such replacement, as you have suggested. 2. >> For compare_rows(), it seems the computation of oa and ob can be delayed to when ba == bb (after the first two if statements). I have checked some examples of ASM code generated by different compilers with -O2/O3 flags on https://gcc.godbolt.org and didn’t see any big benefit in result CPU instructions. You can check yourself an attached example below.
simplified_compare_rows.c
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Best regards, Denis Smirnov | Developer s...@arenadata.io Arenadata | Godovikova 9-17, Moscow 129085 Russia
