ArmPkg/Library/ArmSoftFloatLib/Arm/__aeabi_cdcmp.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2015, Linaro Limited. All rights reserved.
   4 //
   5 // This program and the accompanying materials
   6 // are licensed and made available under the terms and conditions of the BSD License
   7 // which accompanies this distribution.  The full text of the license may be found at
   8 // http://opensource.org/licenses/bsd-license.php
   9 //
  10 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 //
  13 //------------------------------------------------------------------------------
  14
  15     EXPORT      __aeabi_cdrcmple
  16     EXPORT      __aeabi_cdcmpeq
  17     EXPORT      __aeabi_cdcmple
  18     IMPORT      _softfloat_float64_eq
  19     IMPORT      _softfloat_float64_lt
  20
  21     AREA        __aeabi_cdcmp, CODE, READONLY
  22     PRESERVE8
  23
  24 __aeabi_cdrcmple
  25     MOV         IP, R0
  26     MOV         R0, R2
  27     MOV         R2, IP
  28
  29     MOV         IP, R1
  30     MOV         R1, R3
  31     MOV         R3, IP
  32
  33 __aeabi_cdcmpeq
  34 __aeabi_cdcmple
  35     PUSH        {R0 - R3, IP, LR}
  36     BL          _softfloat_float64_eq
  37     SUB         IP, R0, #1
  38     CMP         IP, #0                  // sets C and Z if R0 == 1
  39     POPEQ       {R0 - R3, IP, PC}
  40
  41     LDM         SP, {R0 - R3}
  42     BL          _softfloat_float64_lt
  43     SUB         IP, R0, #1
  44     CMP         IP, #1                  // sets C if R0 == 0
  45     POP         {R0 - R3, IP, PC}
  46
  47     END