123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
// -*- C -*-
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//
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// Simulator definition for the SmartMIPS extensions.
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// Copyright (C) 2005-2020 Free Software Foundation, Inc.
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// Contributed by Nigel Stephens (nigel@mips.com) and
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// David Ung (davidu@mips.com) of MIPS Technologies.
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//
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// This file is part of GDB, the GNU debugger.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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011100,5.BASE,5.INDEX,5.RD,00010,001000:SPECIAL:32::LWXS
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"lwxs r<RD>, <INDEX>(r<BASE>)"
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*smartmips:
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{
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GPR[RD] = EXTEND32 (do_load(SD_, AccessLength_WORD, GPR[BASE], GPR[INDEX]<<2));
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}
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011100,5.RS,5.RT,00000,10001,000001:SPECIAL:32::MADDP
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"maddp r<RS>, r<RT>"
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*smartmips:
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{
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unsigned64 res;
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unsigned64 rs, rt;
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int i;
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check_mult_hilo (SD_, HIHISTORY, LOHISTORY);
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TRACE_ALU_INPUT2 (GPR[RS], GPR[RT]);
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res = 0;
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rs = GPR[RS];
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rt = GPR[RT];
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for (i = 0; i < 32; i++)
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{
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if (rs & 1)
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res ^= rt;
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rs >>= 1;
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rt <<= 1;
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}
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LO ^= EXTEND32 (VL4_8 (res));
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HI ^= EXTEND32 (VH4_8 (res));
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TRACE_ALU_RESULT2 (HI, LO);
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}
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000000,0000000000,5.RD,00001,010010:SPECIAL:32::MFLHXU
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"mflhxu r<RD>"
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*smartmips:
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{
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check_mf_hilo (SD_, HIHISTORY, LOHISTORY);
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TRACE_ALU_INPUT3 (ACX,HI,LO);
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GPR[RD] = LO;
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LO = HI;
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HI = ACX;
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ACX = 0;
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TRACE_ALU_RESULT4 (ACX,HI,LO,GPR[RD]);
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}
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000000,5.RS,000000000000001,010011:SPECIAL:32::MTLHX
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"mtlhx r<RS>"
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*smartmips:
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{
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check_mf_hilo (SD_, HIHISTORY, LOHISTORY);
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TRACE_ALU_INPUT3 (HI,LO,GPR[RS]);
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ACX = HI;
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HI = LO;
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LO = GPR[RS];
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TRACE_ALU_RESULT4 (ACX,HI,LO,GPR[RS]);
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}
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000000,5.RS,5.RT,00000,10001,011001:SPECIAL:32::MULTP
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"multp r<RS>, r<RT>"
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*smartmips:
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{
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unsigned64 res;
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unsigned64 rs, rt;
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int i;
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check_mult_hilo (SD_, HIHISTORY, LOHISTORY);
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TRACE_ALU_INPUT2 (GPR[RS], GPR[RT]);
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res = 0;
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rs = GPR[RS];
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rt = GPR[RT];
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for (i = 0; i < 32; i++)
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{
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if (rs & 1)
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res ^= rt;
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rs >>= 1;
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rt <<= 1;
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}
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LO = EXTEND32 (VL4_8 (res));
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HI = EXTEND32 (VH4_8 (res));
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ACX = 0;
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TRACE_ALU_RESULT2 (HI, LO);
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}
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011100,5.RS,5.RT,00000,10010,000001:SPECIAL:32::PPERM
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"pperm r<RS>, r<RT>"
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*smartmips:
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{
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int i;
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ACX = (ACX << 6) | MSEXTRACTED(HI,26,31);
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HI = EXTEND32 ((HI << 6) | MSEXTRACTED(LO,26,31));
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LO = EXTEND32 (LO << 6);
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for (i = 0; i < 6; i++) {
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int sbit = 5*i;
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int ebit = sbit + 4;
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int tbit = EXTRACTED(GPR[RT],sbit,ebit);
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LO |= MSEXTRACTED(GPR[RS],tbit,tbit) << i;
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}
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}
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