1*4882a593Smuzhiyun/* 2*4882a593Smuzhiyun * linux/arch/arm/lib/muldi3.S 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Author: Nicolas Pitre 5*4882a593Smuzhiyun * Created: Oct 19, 2005 6*4882a593Smuzhiyun * Copyright: Monta Vista Software, Inc. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun#include <linux/linkage.h> 12*4882a593Smuzhiyun#include <asm/assembler.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun#ifdef __ARMEB__ 15*4882a593Smuzhiyun#define xh r0 16*4882a593Smuzhiyun#define xl r1 17*4882a593Smuzhiyun#define yh r2 18*4882a593Smuzhiyun#define yl r3 19*4882a593Smuzhiyun#else 20*4882a593Smuzhiyun#define xl r0 21*4882a593Smuzhiyun#define xh r1 22*4882a593Smuzhiyun#define yl r2 23*4882a593Smuzhiyun#define yh r3 24*4882a593Smuzhiyun#endif 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun.pushsection .text.__muldi3, "ax" 27*4882a593SmuzhiyunENTRY(__muldi3) 28*4882a593SmuzhiyunENTRY(__aeabi_lmul) 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun mul xh, yl, xh 31*4882a593Smuzhiyun mla xh, xl, yh, xh 32*4882a593Smuzhiyun mov ip, xl, lsr #16 33*4882a593Smuzhiyun mov yh, yl, lsr #16 34*4882a593Smuzhiyun bic xl, xl, ip, lsl #16 35*4882a593Smuzhiyun bic yl, yl, yh, lsl #16 36*4882a593Smuzhiyun mla xh, yh, ip, xh 37*4882a593Smuzhiyun mul yh, xl, yh 38*4882a593Smuzhiyun mul xl, yl, xl 39*4882a593Smuzhiyun mul ip, yl, ip 40*4882a593Smuzhiyun adds xl, xl, yh, lsl #16 41*4882a593Smuzhiyun adc xh, xh, yh, lsr #16 42*4882a593Smuzhiyun adds xl, xl, ip, lsl #16 43*4882a593Smuzhiyun adc xh, xh, ip, lsr #16 44*4882a593Smuzhiyun ret lr 45*4882a593Smuzhiyun 46*4882a593SmuzhiyunENDPROC(__muldi3) 47*4882a593SmuzhiyunENDPROC(__aeabi_lmul) 48*4882a593Smuzhiyun.popsection 49