cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ucmpdi2.c (568B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 */
      4
      5#include <linux/module.h>
      6#include <linux/libgcc.h>
      7
      8word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
      9{
     10	const DWunion au = {.ll = a};
     11	const DWunion bu = {.ll = b};
     12
     13	if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
     14		return 0;
     15	else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
     16		return 2;
     17	if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
     18		return 0;
     19	else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
     20		return 2;
     21	return 1;
     22}
     23EXPORT_SYMBOL(__ucmpdi2);