1/* 2 * linux/arch/arm/lib/muldi3.S 3 * 4 * Author: Nicolas Pitre 5 * Created: Oct 19, 2005 6 * Copyright: Monta Vista Software, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#include <linux/linkage.h> 14#include <asm/assembler.h> 15 16#ifdef __ARMEB__ 17#define xh r0 18#define xl r1 19#define yh r2 20#define yl r3 21#else 22#define xl r0 23#define xh r1 24#define yl r2 25#define yh r3 26#endif 27 28ENTRY(__muldi3) 29ENTRY(__aeabi_lmul) 30 31 mul xh, yl, xh 32 mla xh, xl, yh, xh 33 mov ip, xl, lsr #16 34 mov yh, yl, lsr #16 35 bic xl, xl, ip, lsl #16 36 bic yl, yl, yh, lsl #16 37 mla xh, yh, ip, xh 38 mul yh, xl, yh 39 mul xl, yl, xl 40 mul ip, yl, ip 41 adds xl, xl, yh, lsl #16 42 adc xh, xh, yh, lsr #16 43 adds xl, xl, ip, lsl #16 44 adc xh, xh, ip, lsr #16 45 ret lr 46 47ENDPROC(__muldi3) 48ENDPROC(__aeabi_lmul) 49