From: tkoenig@netcologne.de   
      
   Kent Dickey  schrieb:   
      
   > GCC has actually optimized the loop itself better, but it has lots of   
   > fixup code to create 64-bit register versions of the unsigned inputs   
   > (because the RISC-V ABI specifies all 32-bit quantities must be   
   > sign-extended at the function call boundaries, even if they are   
   > unsigned).   
      
   You mean 0xffffffff as unsigned has to be passed as   
   0xffffffffffffffff ?  Somebody was not thinking that one through...   
      
   At least Loongarch gets that one right; unsigned and signed are   
   zero- and sign-extended, respectively.   
      
      
   [...]   
      
   > RISC-V gives us a modern example   
   > of how to handle not having a full suite of 32-bit instructions, and   
   > what that would look like.   
      
   Seems like it...   
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