There are 3 instructions, MULX, ADCX, and ADOX, which would be very useful to see in qemu. I looked into putting them in myself, but the startup time for hacking qemu is longer than I can affort in this period.
Apparently, MULX is implemented in Haswell, while ADCX and ADOX will appear in Broadwell (or so says the rumours). I need these instructions for hacking the GMP library (GNUs bignum library). Documentation for the instructions is available at http://software.intel.com/file/45088. Would some kind qemu hacker consider adding these instructions? There is support in binutils 23.1 for these instructions, but I think it is there already in version 22.x. In the meantime, I'm using an inferior, comparatively slow emulator. :-) -- Torbjörn
