muldi3.S (771B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * linux/arch/arm/lib/muldi3.S 4 * 5 * Author: Nicolas Pitre 6 * Created: Oct 19, 2005 7 * Copyright: Monta Vista Software, Inc. 8 */ 9 10#include <linux/linkage.h> 11#include <asm/assembler.h> 12 13#ifdef __ARMEB__ 14#define xh r0 15#define xl r1 16#define yh r2 17#define yl r3 18#else 19#define xl r0 20#define xh r1 21#define yl r2 22#define yh r3 23#endif 24 25ENTRY(__muldi3) 26ENTRY(__aeabi_lmul) 27 28 mul xh, yl, xh 29 mla xh, xl, yh, xh 30 mov ip, xl, lsr #16 31 mov yh, yl, lsr #16 32 bic xl, xl, ip, lsl #16 33 bic yl, yl, yh, lsl #16 34 mla xh, yh, ip, xh 35 mul yh, xl, yh 36 mul xl, yl, xl 37 mul ip, yl, ip 38 adds xl, xl, yh, lsl #16 39 adc xh, xh, yh, lsr #16 40 adds xl, xl, ip, lsl #16 41 adc xh, xh, ip, lsr #16 42 ret lr 43 44ENDPROC(__muldi3) 45ENDPROC(__aeabi_lmul)