diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index de933ab66d077f064a4ddf7798558b5a9501940a..0e05e87deafcb7581a6cc1c8def80fd2ec98fa6b 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 0000000000000000000000000000000000000000..daa5704a2550f8b74032173420346178ec4d7b80 --- /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 +#include + +#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)