Displaying 2 results from an estimated 2 matches for "30e5f318".
2018 Nov 28
2
Rather poor code optimisation of current clang/LLVM targeting Intel x86 (both -64 and -32)
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2018 Nov 27
2
Rather poor code optimisation of current clang/LLVM targeting Intel x86 (both -64 and -32)
"Sanjay Patel" <spatel at rotateright.com> wrote:
> IIUC, you want to use x86-specific bit-hacks (sbb masking) in cases like
> this:
> unsigned int foo(unsigned int crc) {
> if (crc & 0x80000000)
> crc <<= 1, crc ^= 0xEDB88320;
> else
> crc <<= 1;
> return crc;
> }
To document this for x86 too: rewrite the function