###################################-*-asm*- # # Copyright (C) 2009-2016 Free Software Foundation, Inc. # # Contributed by Michael Eager . # # This file is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; either version 3, or (at your option) any # later version. # # GCC is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public # License for more details. # # Under Section 7 of GPL version 3, you are granted additional # permissions described in the GCC Runtime Library Exception, version # 3.1, as published by the Free Software Foundation. # # You should have received a copy of the GNU General Public License and # a copy of the GCC Runtime Library Exception along with this program; # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see # . # # mulsi3.S # # Multiply operation for 32 bit integers. # Input : Operand1 in Reg r5 # Operand2 in Reg r6 # Output: Result [op1 * op2] in Reg r3 # ####################################### .globl __mulsi3 .ent __mulsi3 .type __mulsi3,@function __mulsi3: .frame r1,0,r15 add r3,r0,r0 BEQI r5,$L_Result_Is_Zero # Multiply by Zero BEQI r6,$L_Result_Is_Zero # Multiply by Zero BGEId r5,$L_R5_Pos XOR r4,r5,r6 # Get the sign of the result RSUBI r5,r5,0 # Make r5 positive $L_R5_Pos: BGEI r6,$L_R6_Pos RSUBI r6,r6,0 # Make r6 positive $L_R6_Pos: bri $L1 $L2: add r5,r5,r5 $L1: srl r6,r6 addc r7,r0,r0 beqi r7,$L2 bneid r6,$L2 add r3,r3,r5 blti r4,$L_NegateResult rtsd r15,8 nop $L_NegateResult: rtsd r15,8 rsub r3,r3,r0 $L_Result_Is_Zero: rtsd r15,8 addi r3,r0,0 .end __mulsi3 .size __mulsi3, . - __mulsi3