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ArmPkg/CompilerIntrinsicsLib: Add uread, uwrite GCC assembly sources

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The new sources are a copy of the RVCT version.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Pete Batard <pete@akeo.ie>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Pete Batard
2019-05-13 09:54:16 +01:00
committed by Leif Lindholm
parent d039044be4
commit 96ef5a8e30
3 changed files with 109 additions and 0 deletions
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54
ArmPkg/Library/CompilerIntrinsicsLib/Arm/uread.S Normal file
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#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#------------------------------------------------------------------------------
#include <AsmMacroIoLib.h>
#
#UINT32
#EFIAPI
#__aeabi_uread4 (
# IN VOID *Pointer
# );
#
ASM_FUNC(__aeabi_uread4)
ldrb r1, [r0]
ldrb r2, [r0, #1]
ldrb r3, [r0, #2]
ldrb r0, [r0, #3]
orr r1, r1, r2, lsl #8
orr r1, r1, r3, lsl #16
orr r0, r1, r0, lsl #24
bx lr
#
#UINT64
#EFIAPI
#__aeabi_uread8 (
# IN VOID *Pointer
# );
#
ASM_FUNC(__aeabi_uread8)
mov r3, r0
ldrb r1, [r3]
ldrb r2, [r3, #1]
orr r1, r1, r2, lsl #8
ldrb r2, [r3, #2]
orr r1, r1, r2, lsl #16
ldrb r0, [r3, #3]
orr r0, r1, r0, lsl #24
ldrb r1, [r3, #4]
ldrb r2, [r3, #5]
orr r1, r1, r2, lsl #8
ldrb r2, [r3, #6]
orr r1, r1, r2, lsl #16
ldrb r2, [r3, #7]
orr r1, r1, r2, lsl #24
bx lr