arch/hexagon/lib/divsi3.S

   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
   8 SYM_FUNC_START(__hexagon_divsi3)
   9         {
  10                 p0 = cmp.gt(r0,#-1)
  11                 p1 = cmp.gt(r1,#-1)
  12                 r3:2 = vabsw(r1:0)
  13         }
  14         {
  15                 p3 = xor(p0,p1)
  16                 r4 = sub(r2,r3)
  17                 r6 = cl0(r2)
  18                 p0 = cmp.gtu(r3,r2)
  19         }
  20         {
  21                 r0 = mux(p3,#-1,#1)
  22                 r7 = cl0(r3)
  23                 p1 = cmp.gtu(r3,r4)
  24         }
  25         {
  26                 r0 = mux(p0,#0,r0)
  27                 p0 = or(p0,p1)
  28                 if (p0.new) jumpr:nt r31
  29                 r6 = sub(r7,r6)
  30         }
  31         {
  32                 r7 = r6
  33                 r5:4 = combine(#1,r3)
  34                 r6 = add(#1,lsr(r6,#1))
  35                 p0 = cmp.gtu(r6,#4)
  36         }
  37         {
  38                 r5:4 = vaslw(r5:4,r7)
  39                 if (!p0) r6 = #3
  40         }
  41         {
  42                 loop0(1f,r6)
  43                 r7:6 = vlsrw(r5:4,#1)
  44                 r1:0 = #0
  45         }
  46         .falign
  47 1:
  48         {
  49                 r5:4 = vlsrw(r5:4,#2)
  50                 if (!p0.new) r0 = add(r0,r5)
  51                 if (!p0.new) r2 = sub(r2,r4)
  52                 p0 = cmp.gtu(r4,r2)
  53         }
  54         {
  55                 r7:6 = vlsrw(r7:6,#2)
  56                 if (!p0.new) r0 = add(r0,r7)
  57                 if (!p0.new) r2 = sub(r2,r6)
  58                 p0 = cmp.gtu(r6,r2)
  59         }:endloop0
  60         {
  61                 if (!p0) r0 = add(r0,r7)
  62         }
  63         {
  64                 if (p3) r0 = sub(r1,r0)
  65                 jumpr r31
  66         }
  67 SYM_FUNC_END(__hexagon_divsi3)