rt-thread/bsp/stm32_radio/mp3/real/arm/asmmisc.s

69 lines
2.2 KiB
ArmAsm

;/* ***** BEGIN LICENSE BLOCK *****
; * Version: RCSL 1.0/RPSL 1.0
; *
; * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
; *
; * The contents of this file, and the files included with this file, are
; * subject to the current version of the RealNetworks Public Source License
; * Version 1.0 (the "RPSL") available at
; * http://www.helixcommunity.org/content/rpsl unless you have licensed
; * the file under the RealNetworks Community Source License Version 1.0
; * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
; * in which case the RCSL will apply. You may also obtain the license terms
; * directly from RealNetworks. You may not use this file except in
; * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
; * applicable to this file, the RCSL. Please see the applicable RPSL or
; * RCSL for the rights, obligations and limitations governing use of the
; * contents of the file.
; *
; * This file is part of the Helix DNA Technology. RealNetworks is the
; * developer of the Original Code and owns the copyrights in the portions
; * it created.
; *
; * This file, and the files included with this file, is distributed and made
; * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
; * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
; * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
; * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
; *
; * Technology Compatibility Kit Test Suite(s) Location:
; * http://www.helixcommunity.org/content/tck
; *
; * Contributor(s):
; *
; * ***** END LICENSE BLOCK ***** */
AREA |.text|, CODE, READONLY
THUMB
REQUIRE8
PRESERVE8
; int xmp3_MULSHIFT32(int x, int y)
EXPORT xmp3_MULSHIFT32
EXPORT xmp3_FASTABS
;.cpu cortex-m3
;.fpu softvfp
;.syntax unified
;.thumb
;.text
; .global xmp3_MULSHIFT32
; .thumb_func
xmp3_MULSHIFT32 PROC
smull r2, r0, r1, r0
; mov pc, lr // KJ changed to BX for Cortex
BX lr
ENDP
;.global xmp3_FASTABS
;.thumb_func
xmp3_FASTABS PROC
mov r1, r0
mov r0, #0x0
eor r0, r1, r1, asr # 31
sub r0, r0, r1, asr # 31
bx lr
ENDP
END