1 /* Copyright (C) 2014-2022 Free Software Foundation, Inc. 2 Contributed by Dimitar Dimitrov <dimitar (at) dinux.eu> 3 4 This file is free software; you can redistribute it and/or modify it 5 under the terms of the GNU General Public License as published by the 6 Free Software Foundation; either version 3, or (at your option) any 7 later version. 8 9 This file is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 General Public License for more details. 13 14 Under Section 7 of GPL version 3, you are granted additional 15 permissions described in the GCC Runtime Library Exception, version 16 3.1, as published by the Free Software Foundation. 17 18 You should have received a copy of the GNU General Public License and 19 a copy of the GCC Runtime Library Exception along with this program; 20 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 21 <http://www.gnu.org/licenses/>. 22 23 (al + C * ah) * (bl + C * bh) = al * bl 24 + C * ah * bl 25 + C * al * bh 26 + C * C * ah * bh -> discard, overflow 27 Where C=(1 << 32) 28 */ 29 30 #include "pru-asm.h" 31 32 .section .text.__pruabi_mpyll, "ax" 33 34 .global SYM(__pruabi_mpyll) 35 FUNC(__pruabi_mpyll) 36 SYM(__pruabi_mpyll): 37 /* + C * ah * bl */ 38 mov r28, r15 39 mov r29, r16 40 nop 41 xin 0, r26, 8 42 43 /* + C * al * bh */ 44 mov r28, r14 45 mov r29, r17 46 mov r15, r26 /* "Loose" ah, record only reslo. */ 47 xin 0, r26, 8 48 49 /* + al * bl */ 50 /* mov r28, r14 -> No need, already loaded. */ 51 mov r29, r16 52 add r15, r15, r26 53 xin 0, r26, 8 54 mov r14, r26 55 add r15, r15, r27 56 57 ret 58 59 ENDFUNC(__pruabi_mpyll) 60
Indexes created Sun Mar 01 05:31:48 UTC 2026