How to use fpu custom instruction ?

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originally posted by cizard@Sep 14 2006, 12:27 AM

so when i write c code : a > b (where a and b are float type), assembler code do not use custom instruction (but use math library function "gtsf2" call).

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I actually had this problem running Altera&#39;s floating point profile example. If I set the project to Release mode, it would no longer use the FPU instructions. I had to modify the compiler flags via right-clicking on the project folder, selecting Properties, then C/C++ Build, the release mode, then Tool Settings/Compiler/General and set the optimization level to -O1 instead of the default of -O2. Then when I looked at the generated .s file, I saw the code written by the compiler was correct (use Compiler flag -save-temps to be able to see the generated .s file).