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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modsi3.S (1066B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (c) 2021, The Linux Foundation. All rights reserved.
      4 */
      5
      6#include <linux/linkage.h>
      7
      8SYM_FUNC_START(__hexagon_modsi3)
      9        {
     10                p2 = cmp.ge(r0,#0)
     11                r2 = abs(r0)
     12                r1 = abs(r1)
     13        }
     14        {
     15                r3 = cl0(r2)
     16                r4 = cl0(r1)
     17                p0 = cmp.gtu(r1,r2)
     18        }
     19        {
     20                r3 = sub(r4,r3)
     21                if (p0) jumpr r31
     22        }
     23        {
     24                p1 = cmp.eq(r3,#0)
     25                loop0(1f,r3)
     26                r0 = r2
     27                r2 = lsl(r1,r3)
     28        }
     29        .falign
     301:
     31        {
     32                p0 = cmp.gtu(r2,r0)
     33                if (!p0.new) r0 = sub(r0,r2)
     34                r2 = lsr(r2,#1)
     35                if (p1) r1 = #0
     36        }:endloop0
     37        {
     38                p0 = cmp.gtu(r2,r0)
     39                if (!p0.new) r0 = sub(r0,r1)
     40                if (p2) jumpr r31
     41        }
     42        {
     43                r0 = neg(r0)
     44                jumpr r31
     45        }
     46SYM_FUNC_END(__hexagon_modsi3)