compiler-rt/lib/builtins/hexagon/divsi3.S

   1 //===----------------------Hexagon builtin routine ------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9
  10
  11         .macro FUNCTION_BEGIN name
  12         .text
  13         .p2align 5
  14         .globl \name
  15         .type  \name, @function
  16 \name:
  17         .endm
  18
  19         .macro FUNCTION_END name
  20         .size  \name, . - \name
  21         .endm
  22
  23
  24 FUNCTION_BEGIN __hexagon_divsi3
  25         {
  26                 p0 = cmp.ge(r0,#0)
  27                 p1 = cmp.ge(r1,#0)
  28                 r1 = abs(r0)
  29                 r2 = abs(r1)
  30         }
  31         {
  32                 r3 = cl0(r1)
  33                 r4 = cl0(r2)
  34                 r5 = sub(r1,r2)
  35                 p2 = cmp.gtu(r2,r1)
  36         }
  37 #if (__HEXAGON_ARCH__ == 60)
  38         {
  39                 r0 = #0
  40                 p1 = xor(p0,p1)
  41                 p0 = cmp.gtu(r2,r5)
  42         }
  43                 if (p2) jumpr r31
  44 #else
  45         {
  46                 r0 = #0
  47                 p1 = xor(p0,p1)
  48                 p0 = cmp.gtu(r2,r5)
  49                 if (p2) jumpr r31
  50         }
  51 #endif
  52         {
  53                 r0 = mux(p1,#-1,#1)
  54                 if (p0) jumpr r31
  55                 r4 = sub(r4,r3)
  56                 r3 = #1
  57         }
  58         {
  59                 r0 = #0
  60                 r3:2 = vlslw(r3:2,r4)
  61                 loop0(1f,r4)
  62         }
  63         .falign
  64 1:
  65         {
  66                 p0 = cmp.gtu(r2,r1)
  67                 if (!p0.new) r1 = sub(r1,r2)
  68                 if (!p0.new) r0 = add(r0,r3)
  69                 r3:2 = vlsrw(r3:2,#1)
  70         }:endloop0
  71         {
  72                 p0 = cmp.gtu(r2,r1)
  73                 if (!p0.new) r0 = add(r0,r3)
  74                 if (!p1) jumpr r31
  75         }
  76         {
  77                 r0 = neg(r0)
  78                 jumpr r31
  79         }
  80 FUNCTION_END __hexagon_divsi3
  81
  82   .globl __qdsp_divsi3
  83   .set   __qdsp_divsi3, __hexagon_divsi3