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 --- arch/arm/lib/Makefile | 3 ++- arch/arm/lib/muldi3.S | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+), 1 deletion(-) create mode 100644 arch/arm/lib/muldi3.S
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 8945915..86489fd 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..2043059 --- /dev/null +++ b/arch/arm/lib/muldi3.S @@ -0,0 +1,48 @@ +/* + * linux/arch/arm/lib/muldi3.S + * + * Author: Nicolas Pitre + * Created: Oct 19, 2005 + * Copyright: Monta Vista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#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)