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| author | Marek Vasut <marex@denx.de> | 2016-05-26 18:01:44 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-06-02 21:21:46 -0400 |
| commit | 0bf65c6422d51768bc30735dbd97cf66f09a0450 (patch) | |
| tree | dca234426d819fab0723a763fb751f5fa52e052f /arch | |
| parent | 40d67c75e47e2e76cc310515c55d758151b9fdde (diff) | |
| download | u-boot-imx-0bf65c6422d51768bc30735dbd97cf66f09a0450.zip u-boot-imx-0bf65c6422d51768bc30735dbd97cf66f09a0450.tar.gz u-boot-imx-0bf65c6422d51768bc30735dbd97cf66f09a0450.tar.bz2 | |
arm: lib: import muldi3.S from Linux
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/lib/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/lib/muldi3.S | 46 |
2 files changed, 48 insertions, 1 deletions
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index de933ab..0e05e87 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -6,7 +6,8 @@ # lib-$(CONFIG_USE_PRIVATE_LIBGCC) += ashldi3.o ashrdi3.o lshrdi3.o \ - lib1funcs.o uldivmod.o div0.o div64.o + lib1funcs.o uldivmod.o div0.o \ + div64.o muldi3.o ifdef CONFIG_CPU_V7M obj-y += vectors_m.o crt0.o diff --git a/arch/arm/lib/muldi3.S b/arch/arm/lib/muldi3.S new file mode 100644 index 0000000..daa5704 --- /dev/null +++ b/arch/arm/lib/muldi3.S @@ -0,0 +1,46 @@ +/* + * 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) |