mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-10-02 09:30:43 +09:00
0bf65c6422
Import muldi3.S from Linux 4.4.6 , commit 0d1912303e54ed1b2a371be0bba51c384dd57326 on arm32. This file implements __aeabi_lmul and it's alias __muldi3, which is needed when doing Thumb1 builds. This patch also defines CONFIG_THUMB2_KERNEL and CONFIG_ARM_ASM_UNIFIED which is necessary for correct build of these files both in ARM and Thumb mode, just like Linux does. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Albert Aribaud <albert.u.boot@aribaud.net> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Tom Rini <trini@konsulko.com>
47 lines
767 B
ArmAsm
47 lines
767 B
ArmAsm
/*
|
|
* linux/arch/arm/lib/muldi3.S
|
|
*
|
|
* Author: Nicolas Pitre
|
|
* Created: Oct 19, 2005
|
|
* Copyright: Monta Vista Software, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
#ifdef __ARMEB__
|
|
#define xh r0
|
|
#define xl r1
|
|
#define yh r2
|
|
#define yl r3
|
|
#else
|
|
#define xl r0
|
|
#define xh r1
|
|
#define yl r2
|
|
#define yh r3
|
|
#endif
|
|
|
|
ENTRY(__muldi3)
|
|
ENTRY(__aeabi_lmul)
|
|
|
|
mul xh, yl, xh
|
|
mla xh, xl, yh, xh
|
|
mov ip, xl, lsr #16
|
|
mov yh, yl, lsr #16
|
|
bic xl, xl, ip, lsl #16
|
|
bic yl, yl, yh, lsl #16
|
|
mla xh, yh, ip, xh
|
|
mul yh, xl, yh
|
|
mul xl, yl, xl
|
|
mul ip, yl, ip
|
|
adds xl, xl, yh, lsl #16
|
|
adc xh, xh, yh, lsr #16
|
|
adds xl, xl, ip, lsl #16
|
|
adc xh, xh, ip, lsr #16
|
|
ret lr
|
|
|
|
ENDPROC(__muldi3)
|
|
ENDPROC(__aeabi_lmul)
|