388 lines
7.9 KiB
C
388 lines
7.9 KiB
C
// -*- C -*-
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// Simulator definition for the MIPS 32/64 revision 2 instructions.
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// Copyright (C) 2004-2022 Free Software Foundation, Inc.
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// Contributed by David Ung, of MIPS Technologies.
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//
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// This file is part of the MIPS sim.
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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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:function:::void:do_dsbh:int rd, int rt
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{
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union { uint64_t d; uint16_t h[4]; } u;
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TRACE_ALU_INPUT1 (GPR[rt]);
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u.d = GPR[rt];
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u.h[0] = SWAP_2 (u.h[0]);
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u.h[1] = SWAP_2 (u.h[1]);
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u.h[2] = SWAP_2 (u.h[2]);
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u.h[3] = SWAP_2 (u.h[3]);
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GPR[rd] = u.d;
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TRACE_ALU_RESULT1 (GPR[rd]);
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}
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:function:::void:do_dshd:int rd, int rt
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{
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uint64_t d;
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TRACE_ALU_INPUT1 (GPR[rt]);
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d = GPR[rt];
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GPR[rd] = ((d >> 48)
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| (d << 48)
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| ((d & 0x0000ffff00000000ULL) >> 16)
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| ((d & 0x00000000ffff0000ULL) << 16));
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TRACE_ALU_RESULT1 (GPR[rd]);
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}
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:function:::void:do_dext:int rt, int rs, int lsb, int size
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{
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TRACE_ALU_INPUT3 (GPR[rs], lsb, size);
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GPR[rt] = EXTRACTED64 (GPR[rs], lsb + size, lsb);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_dextm:int rt, int rs, int lsb, int size
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{
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TRACE_ALU_INPUT3 (GPR[rs], lsb, size);
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GPR[rt] = EXTRACTED64 (GPR[rs], lsb + size + 32, lsb);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_dextu:int rt, int rs, int lsb, int size
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{
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TRACE_ALU_INPUT3 (GPR[rs], lsb, size);
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GPR[rt] = EXTRACTED64 (GPR[rs], lsb + 32 + size, lsb + 32);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_di:int rt
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{
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TRACE_ALU_INPUT0 ();
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GPR[rt] = EXTEND32 (SR);
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SR &= ~status_IE;
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_dins:int rt, int rs, int lsb, int msb
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{
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TRACE_ALU_INPUT4 (GPR[rt], GPR[rs], lsb, msb);
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if (lsb <= msb)
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GPR[rt] ^= (GPR[rt] ^ (GPR[rs] << lsb)) & MASK64 (msb, lsb);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_dinsm:int rt, int rs, int lsb, int msb
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{
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TRACE_ALU_INPUT4 (GPR[rt], GPR[rs], lsb, msb);
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if (lsb <= msb + 32)
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GPR[rt] ^= (GPR[rt] ^ (GPR[rs] << lsb)) & MASK64 (msb + 32, lsb);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_ei:int rt
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{
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TRACE_ALU_INPUT0 ();
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GPR[rt] = EXTEND32 (SR);
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SR |= status_IE;
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_ext:int rt, int rs, int lsb, int size
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{
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TRACE_ALU_INPUT3 (GPR[rs], lsb, size);
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GPR[rt] = EXTEND32 (EXTRACTED32 (GPR[rs], lsb + size, lsb));
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_mfhc1:int rt, int fs
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{
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check_fpu (SD_);
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if (SizeFGR() == 64)
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GPR[rt] = EXTEND32 (WORD64HI (FGR[fs]));
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else if ((fs & 0x1) == 0)
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GPR[rt] = EXTEND32 (FGR[fs + 1]);
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else
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{
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if (STATE_VERBOSE_P(SD))
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sim_io_eprintf (SD,
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"Warning: PC 0x%lx: MFHC1 32-bit use of odd FPR number\n",
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(long) CIA);
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GPR[rt] = EXTEND32 (0xBADF00D);
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}
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TRACE_ALU_RESULT (GPR[rt]);
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}
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:function:::void:do_mthc1:int rt, int fs
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{
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check_fpu (SD_);
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if (SizeFGR() == 64)
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StoreFPR (fs, fmt_uninterpreted_64, SET64HI (GPR[rt]) | VL4_8 (FGR[fs]));
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else if ((fs & 0x1) == 0)
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StoreFPR (fs + 1, fmt_uninterpreted_32, VL4_8 (GPR[rt]));
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else
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{
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if (STATE_VERBOSE_P(SD))
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sim_io_eprintf (SD,
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"Warning: PC 0x%lx: MTHC1 32-bit use of odd FPR number\n",
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(long) CIA);
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StoreFPR (fs, fmt_uninterpreted_32, 0xDEADC0DE);
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}
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TRACE_FP_RESULT (GPR[rt]);
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}
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:function:::void:do_ins:int rt, int rs, int lsb, int msb
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{
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TRACE_ALU_INPUT4 (GPR[rt], GPR[rs], lsb, msb);
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if (lsb <= msb)
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GPR[rt] = EXTEND32 (GPR[rt] ^
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((GPR[rt] ^ (GPR[rs] << lsb)) & MASK32 (msb, lsb)));
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_dinsu:int rt, int rs, int lsb, int msb
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{
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TRACE_ALU_INPUT4 (GPR[rt], GPR[rs], lsb, msb);
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if (lsb <= msb)
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GPR[rt] ^= (GPR[rt] ^ (GPR[rs] << (lsb + 32)))
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& MASK64 (msb + 32, lsb + 32);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_seb:int rd, int rt
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{
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TRACE_ALU_INPUT1 (GPR[rt]);
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GPR[rd] = EXTEND8 (GPR[rt]);
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TRACE_ALU_RESULT1 (GPR[rd]);
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}
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:function:::void:do_seh:int rd, int rt
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{
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TRACE_ALU_INPUT1 (GPR[rt]);
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GPR[rd] = EXTEND16 (GPR[rt]);
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TRACE_ALU_RESULT1 (GPR[rd]);
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}
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:function:::void:do_rdhwr:int rt, int rd
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{
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// Return 0 for all hardware registers currently
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GPR[rt] = EXTEND32 (0);
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TRACE_ALU_RESULT1 (GPR[rt]);
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}
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:function:::void:do_wsbh:int rd, int rt
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{
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union { uint32_t w; uint16_t h[2]; } u;
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TRACE_ALU_INPUT1 (GPR[rt]);
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u.w = GPR[rt];
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u.h[0] = SWAP_2 (u.h[0]);
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u.h[1] = SWAP_2 (u.h[1]);
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GPR[rd] = EXTEND32 (u.w);
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TRACE_ALU_RESULT1 (GPR[rd]);
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}
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011111,5.RS,5.RT,5.SIZE,5.LSB,000011::64::DEXT
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"dext r<RT>, r<RS>, <LSB>, <SIZE+1>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dext (SD_, RT, RS, LSB, SIZE);
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}
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011111,5.RS,5.RT,5.SIZE,5.LSB,000001::64::DEXTM
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"dextm r<RT>, r<RS>, <LSB>, <SIZE+33>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dextm (SD_, RT, RS, LSB, SIZE);
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}
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011111,5.RS,5.RT,5.SIZE,5.LSB,000010::64::DEXTU
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"dextu r<RT>, r<RS>, <LSB+32>, <SIZE+1>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dextu (SD_, RT, RS, LSB, SIZE);
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}
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010000,01011,5.RT,01100,00000,0,00,000::32::DI
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"di":RT == 0
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"di r<RT>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_di (SD_, RT);
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}
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011111,5.RS,5.RT,5.MSB,5.LSB,000111::64::DINS
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"dins r<RT>, r<RS>, <LSB>, <MSB-LSB+1>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dins (SD_, RT, RS, LSB, MSB);
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}
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011111,5.RS,5.RT,5.MSB,5.LSB,000101::64::DINSM
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"dinsm r<RT>, r<RS>, <LSB>, <MSB+32-LSB+1>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dinsm (SD_, RT, RS, LSB, MSB);
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}
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011111,5.RS,5.RT,5.MSB,5.LSB,000110::64::DINSU
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"dinsu r<RT>, r<RS>, <LSB+32>, <MSB-LSB+1>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dinsu (SD_, RT, RS, LSB, MSB);
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}
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011111,00000,5.RT,5.RD,00010,100100::64::DSBH
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"dsbh r<RD>, r<RT>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dsbh (SD_, RD, RT);
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}
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011111,00000,5.RT,5.RD,00101,100100::64::DSHD
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"dshd r<RD>, r<RT>"
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*mips64r2:
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*mips64r6:
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{
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check_u64 (SD_, instruction_0);
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do_dshd (SD_, RD, RT);
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}
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010000,01011,5.RT,01100,00000,1,00,000::32::EI
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"ei":RT == 0
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"ei r<RT>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_ei (SD_, RT);
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}
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011111,5.RS,5.RT,5.SIZE,5.LSB,000000::32::EXT
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"ext r<RT>, r<RS>, <LSB>, <SIZE+1>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_ext (SD_, RT, RS, LSB, SIZE);
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}
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010001,00011,5.RT,5.FS,00000000000:COP1Sa:32,f::MFHC1
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"mfhc1 r<RT>, f<FS>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_mfhc1 (SD_, RT, FS);
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}
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010001,00111,5.RT,5.FS,00000000000:COP1Sa:32,f::MTHC1
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"mthc1 r<RT>, f<FS>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_mthc1 (SD_, RT, FS);
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}
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011111,5.RS,5.RT,5.MSB,5.LSB,000100::32::INS
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"ins r<RT>, r<RS>, <LSB>, <MSB-LSB+1>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_ins (SD_, RT, RS, LSB, MSB);
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}
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011111,00000,5.RT,5.RD,10000,100000::32::SEB
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"seb r<RD>, r<RT>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_seb (SD_, RD, RT);
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}
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011111,00000,5.RT,5.RD,11000,100000::32::SEH
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"seh r<RD>, r<RT>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_seh (SD_, RD, RT);
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}
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000001,5.BASE,11111,16.OFFSET::32::SYNCI
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"synci <OFFSET>(r<BASE>)"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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// sync i-cache - nothing to do currently
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}
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011111,00000,5.RT,5.RD,00000,111011::32::RDHWR
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"rdhwr r<RT>, r<RD>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_rdhwr (SD_, RT, RD);
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}
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011111,00000,5.RT,5.RD,00010,100000::32::WSBH
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"wsbh r<RD>, r<RT>"
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*mips32r2:
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*mips32r6:
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*mips64r2:
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*mips64r6:
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{
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do_wsbh (SD_, RD, RT);
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}
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