162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#include <linux/linkage.h> 362306a36Sopenharmony_ci 462306a36Sopenharmony_ci/* 562306a36Sopenharmony_ci * Multiply operation for 32 bit integers. 662306a36Sopenharmony_ci * Input : Operand1 in Reg r5 762306a36Sopenharmony_ci * Operand2 in Reg r6 862306a36Sopenharmony_ci * Output: Result [op1 * op2] in Reg r3 962306a36Sopenharmony_ci */ 1062306a36Sopenharmony_ci .text 1162306a36Sopenharmony_ci .globl __mulsi3 1262306a36Sopenharmony_ci .type __mulsi3, @function 1362306a36Sopenharmony_ci .ent __mulsi3 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci__mulsi3: 1662306a36Sopenharmony_ci .frame r1, 0, r15 1762306a36Sopenharmony_ci add r3, r0, r0 1862306a36Sopenharmony_ci beqi r5, result_is_zero /* multiply by zero */ 1962306a36Sopenharmony_ci beqi r6, result_is_zero /* multiply by zero */ 2062306a36Sopenharmony_ci bgeid r5, r5_pos 2162306a36Sopenharmony_ci xor r4, r5, r6 /* get the sign of the result */ 2262306a36Sopenharmony_ci rsubi r5, r5, 0 /* make r5 positive */ 2362306a36Sopenharmony_cir5_pos: 2462306a36Sopenharmony_ci bgei r6, r6_pos 2562306a36Sopenharmony_ci rsubi r6, r6, 0 /* make r6 positive */ 2662306a36Sopenharmony_cir6_pos: 2762306a36Sopenharmony_ci bri l1 2862306a36Sopenharmony_cil2: 2962306a36Sopenharmony_ci add r5, r5, r5 3062306a36Sopenharmony_cil1: 3162306a36Sopenharmony_ci srl r6, r6 3262306a36Sopenharmony_ci addc r7, r0, r0 3362306a36Sopenharmony_ci beqi r7, l2 3462306a36Sopenharmony_ci bneid r6, l2 3562306a36Sopenharmony_ci add r3, r3, r5 3662306a36Sopenharmony_ci blti r4, negateresult 3762306a36Sopenharmony_ci rtsd r15, 8 3862306a36Sopenharmony_ci nop 3962306a36Sopenharmony_cinegateresult: 4062306a36Sopenharmony_ci rtsd r15, 8 4162306a36Sopenharmony_ci rsub r3, r3, r0 4262306a36Sopenharmony_ciresult_is_zero: 4362306a36Sopenharmony_ci rtsd r15, 8 4462306a36Sopenharmony_ci addi r3, r0, 0 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_ci.size __mulsi3, . - __mulsi3 4762306a36Sopenharmony_ci.end __mulsi3 48