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 25 ENTRY(__muldi3) 26 ENTRY(__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 44 ENDPROC(__muldi3) 45 ENDPROC(__aeabi_lmul)
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