| ###################################-*-asm*- |
| # |
| # Copyright (C) 2009-2021 Free Software Foundation, Inc. |
| # |
| # Contributed by Michael Eager <eager@eagercon.com>. |
| # |
| # 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 |
| # <http://www.gnu.org/licenses/>. |
| # |
| # mulsi3.S |
| # |
| # Multiply operation for 32 bit integers. |
| # Input : Operand1 in Reg r5 |
| # Operand2 in Reg r6 |
| # Output: Result [op1 * op2] in Reg r3 |
| # |
| ####################################### |
| |
| /* An executable stack is *not* required for these functions. */ |
| #ifdef __linux__ |
| .section .note.GNU-stack,"",%progbits |
| .previous |
| #endif |
| |
| .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 |
