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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [sim/] [mips/] [smartmips.igen] - Blame information for rev 225

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1 24 jeremybenn
// -*- C -*-
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//
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// Simulator definition for the SmartMIPS extensions.
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// Copyright (C) 2005 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 .
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011100,5.BASE,5.INDEX,5.RD,00010,001000:SPECIAL:32::LWXS
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"lwxs r, (r)"
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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, r"
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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"
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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"
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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, r"
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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, r"
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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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