MdePkg/Library/BaseLib/Arm/Math64.S

#------------------------------------------------------------------------------
#
# Replacement for Math64.c that is coded to use older GCC intrinsics.
# Doing this reduces the number of intrinsics that are required when
# you port to a new version of gcc.
#
# Need to split this into multple files to size optimize the image.
#
# Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#------------------------------------------------------------------------------

  .text
  .align 2
  GCC_ASM_EXPORT(InternalMathLShiftU64)

ASM_PFX(InternalMathLShiftU64):
  stmfd  sp!, {r4, r5, r6}
  mov  r6, r1
  rsb  ip, r2, #32
  mov  r4, r6, asl r2
  subs  r1, r2, #32
  orr  r4, r4, r0, lsr ip
  mov  r3, r0, asl r2
  movpl  r4, r0, asl r1
  mov  r5, r0
  mov  r0, r3
  mov  r1, r4
  ldmfd  sp!, {r4, r5, r6}
  bx  lr

  .align 2
  GCC_ASM_EXPORT(InternalMathRShiftU64)

ASM_PFX(InternalMathRShiftU64):
  stmfd  sp!, {r4, r5, r6}
  mov  r5, r0
  rsb  ip, r2, #32
  mov  r3, r5, lsr r2
  subs  r0, r2, #32
  orr  r3, r3, r1, asl ip
  mov  r4, r1, lsr r2
  movpl  r3, r1, lsr r0
  mov  r6, r1
  mov  r0, r3
  mov  r1, r4
  ldmfd  sp!, {r4, r5, r6}
  bx  lr

  .align 2
  GCC_ASM_EXPORT(InternalMathARShiftU64)

ASM_PFX(InternalMathARShiftU64):
  stmfd  sp!, {r4, r5, r6}
  mov  r5, r0
  rsb  ip, r2, #32
  mov  r3, r5, lsr r2
  subs  r0, r2, #32
  orr  r3, r3, r1, asl ip
  mov  r4, r1, asr r2
  movpl  r3, r1, asr r0
  mov  r6, r1
  mov  r0, r3
  mov  r1, r4
  ldmfd  sp!, {r4, r5, r6}
  bx  lr

  .align 2
  GCC_ASM_EXPORT(InternalMathLRotU64)

ASM_PFX(InternalMathLRotU64):
  stmfd  sp!, {r4, r5, r6, r7, lr}
  add  r7, sp, #12
  mov  r6, r1
  rsb  ip, r2, #32
  mov  r4, r6, asl r2
  rsb  lr, r2, #64
  subs  r1, r2, #32
  orr  r4, r4, r0, lsr ip
  mov  r3, r0, asl r2
  movpl  r4, r0, asl r1
  sub  ip, r2, #32
  mov  r5, r0
  mov  r0, r0, lsr lr
  rsbs  r2, r2, #32
  orr  r0, r0, r6, asl ip
  mov  r1, r6, lsr lr
  movpl  r0, r6, lsr r2
  orr  r1, r1, r4
  orr  r0, r0, r3
  ldmfd  sp!, {r4, r5, r6, r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathRRotU64)

ASM_PFX(InternalMathRRotU64):
  stmfd  sp!, {r4, r5, r6, r7, lr}
  add  r7, sp, #12
  mov  r5, r0
  rsb  ip, r2, #32
  mov  r3, r5, lsr r2
  rsb  lr, r2, #64
  subs  r0, r2, #32
  orr  r3, r3, r1, asl ip
  mov  r4, r1, lsr r2
  movpl  r3, r1, lsr r0
  sub  ip, r2, #32
  mov  r6, r1
  mov  r1, r1, asl lr
  rsbs  r2, r2, #32
  orr  r1, r1, r5, lsr ip
  mov  r0, r5, asl lr
  movpl  r1, r5, asl r2
  orr  r0, r0, r3
  orr  r1, r1, r4
  ldmfd  sp!, {r4, r5, r6, r7, pc}

  .align 2
  GCC_ASM_EXPORT(InternalMathMultU64x32)

ASM_PFX(InternalMathMultU64x32):
  stmfd  sp!, {r7, lr}
  add  r7, sp, #0
  mov  r3, #0
  mov  ip, r0
  mov  lr, r1
  umull  r0, r1, ip, r2
  mla  r1, lr, r2, r1
  mla  r1, ip, r3, r1
  ldmfd  sp!, {r7, pc}

  .align 2
  GCC_ASM_EXPORT(InternalMathMultU64x64)

ASM_PFX(InternalMathMultU64x64):
  stmfd  sp!, {r7, lr}
  add  r7, sp, #0
  mov  ip, r0
  mov  lr, r1
  umull  r0, r1, ip, r2
  mla  r1, lr, r2, r1
  mla  r1, ip, r3, r1
  ldmfd  sp!, {r7, pc}

  .align 2
  GCC_ASM_EXPORT(InternalMathDivU64x32)

ASM_PFX(InternalMathDivU64x32):
  stmfd  sp!, {r7, lr}
  add  r7, sp, #0
  mov  r3, #0
  bl   ASM_PFX(__udivdi3)
  ldmfd  sp!, {r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathModU64x32)

ASM_PFX(InternalMathModU64x32):
  stmfd  sp!, {r7, lr}
  add  r7, sp, #0
  mov  r3, #0
  bl   ASM_PFX(__umoddi3)
  ldmfd  sp!, {r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathDivRemU64x32)

ASM_PFX(InternalMathDivRemU64x32):
  stmfd  sp!, {r4, r5, r6, r7, lr}
  add  r7, sp, #12
  stmfd  sp!, {r10, r11}
  subs  r6, r3, #0
  mov  r10, r0
  mov  r11, r1
  moveq  r4, r2
  moveq  r5, #0
  beq  L22
  mov  r4, r2
  mov  r5, #0
  mov  r3, #0
  bl   ASM_PFX(__umoddi3)
  str  r0, [r6, #0]
L22:
  mov  r0, r10
  mov  r1, r11
  mov  r2, r4
  mov  r3, r5
  bl   ASM_PFX(__udivdi3)
  ldmfd  sp!, {r10, r11}
  ldmfd  sp!, {r4, r5, r6, r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathDivRemU64x64)

ASM_PFX(InternalMathDivRemU64x64):
  stmfd  sp!, {r4, r5, r6, r7, lr}
  add  r7, sp, #12
  stmfd  sp!, {r10, r11}
  ldr  r6, [sp, #28]
  mov  r4, r0
  cmp  r6, #0
  mov  r5, r1
  mov  r10, r2
  mov  r11, r3
  beq  L26
  bl   ASM_PFX(__umoddi3)
  stmia  r6, {r0-r1}
L26:
  mov  r0, r4
  mov  r1, r5
  mov  r2, r10
  mov  r3, r11
  bl   ASM_PFX(__udivdi3)
  ldmfd  sp!, {r10, r11}
  ldmfd  sp!, {r4, r5, r6, r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathDivRemS64x64)

ASM_PFX(InternalMathDivRemS64x64):
  stmfd  sp!, {r4, r5, r6, r7, lr}
  add  r7, sp, #12
  stmfd  sp!, {r10, r11}
  ldr  r6, [sp, #28]
  mov  r4, r0
  cmp  r6, #0
  mov  r5, r1
  mov  r10, r2
  mov  r11, r3
  beq  L30
  bl   ASM_PFX(__moddi3)
  stmia  r6, {r0-r1}
L30:
  mov  r0, r4
  mov  r1, r5
  mov  r2, r10
  mov  r3, r11
  bl   ASM_PFX(__divdi3)
  ldmfd  sp!, {r10, r11}
  ldmfd  sp!, {r4, r5, r6, r7, pc}


  .align 2
  GCC_ASM_EXPORT(InternalMathSwapBytes64)

ASM_PFX(InternalMathSwapBytes64):
  stmfd  sp!, {r4, r5, r7, lr}
  mov  r5, r1
  bl  ASM_PFX(SwapBytes32)
  mov  r4, r0
  mov  r0, r5
  bl  ASM_PFX(SwapBytes32)
  mov  r1, r4
  ldmfd  sp!, {r4, r5, r7, pc}


ASM_FUNCTION_REMOVE_IF_UNREFERENCED