xref: /gem5/src/arch/x86/isa/decoder/x87.isa

// Copyright (c) 2007 The Hewlett-Packard Development Company
// Copyright (c) 2012-13 Mark D. Hill and David A. Wood
// Copyright (c) 2015 Advanced Micro Devices, Inc.
//
// All rights reserved.
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black
//          Nilay Vaish
//          Steve Reinhardt

format WarnUnimpl {
    0x1B: decode OPCODE_OP_BOTTOM3 {
        0x0: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: Inst::FADD1(Eq);
                // 32-bit memory operand
                default: Inst::FADD1(Md);
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::FMUL1(Eq);
                default: Inst::FMUL1(Md);
            }
            0x2: fcom();
            0x3: fcomp();
            0x4: decode MODRM_MOD {
                0x3: Inst::FSUB1(Eq);
                default: Inst::FSUB1(Md);
            }
            0x5: fsubr();
            0x6: decode MODRM_MOD {
                0x3: Inst::FDIV1(Eq);
                default: Inst::FDIV1(Md);
            }
            0x7: fdivr();
        }
        0x1: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: Inst::FLD(Eq);
                // 32-bit load
                default: Inst::FLD(Md);
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::FXCH(Eq);
                default: Inst::UD2();
            }
            0x2: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: fnop();
                    default: Inst::UD2();
                }
                default: Inst::FST(Ed);
            }
            0x3: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: Inst::FSTP(Ed);
            }
            0x4: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: Inst::FCHS();
                    0x1: Inst::FABS();
                    0x4: ftst();
                    0x5: fxam();
                    default: Inst::UD2();
                }
                default: Inst::FLDENV(M);
            }
            0x5: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: Inst::FLD1();
                    0x1: Inst::FLDL2T();
                    0x2: Inst::FLDL2E();
                    0x3: Inst::FLDPI();
                    0x4: Inst::FLDLG2();
                    0x5: Inst::FLDLN2();
                    0x6: Inst::FLDZ();
                }
                default: Inst::FLDCW(Mw);
            }
            0x6: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: f2xm1();
                    0x1: Inst::FYL2X();
                    0x2: Inst::FPTAN();
                    0x3: fpatan();
                    0x4: fxtract();
                    0x5: Inst::FPREM1();
                    0x6: fdecstp();
                    0x7: fincstp();
                }
                default: Inst::FNSTENV(M);
            }
            0x7: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: Inst::FPREM();
                    0x1: fyl2xp1();
                    0x2: fsqrt();
                    0x3: Inst::FSINCOS();
                    0x4: frndint();
                    0x5: fscale();
                    0x6: Inst::FSIN();
                    0x7: Inst::FCOS();
                }
                default: Inst::FNSTCW(Mw);
            }
        }
        //0x2: esc2();
        0x2: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: fcmovb();
                default: fiadd();
            }
            0x1: decode MODRM_MOD {
                0x3: fcmove();
                default: fimul();
            }
            0x2: decode MODRM_MOD {
                0x3: fcmovbe();
                default: ficom();
            }
            0x3: decode MODRM_MOD {
                0x3: fcmovu();
                default: ficomp();
            }
            0x4: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fisub();
            }
            0x5: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x1: fucompp();
                    default: Inst::UD2();
                }
                default: fisubr();
            }
            0x6: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fidiv();
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fidivr();
            }
        }
        //0x3: esc3();
        0x3: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: fcmovnb();
                default: Inst::FILD(Md); // 32-bit int
            }
            0x1: decode MODRM_MOD {
                0x3: fcmovne();
                default: fisttp();
            }
            0x2: decode MODRM_MOD {
                0x3: fcmovnbe();
                default: fist();
            }
            0x3: decode MODRM_MOD {
                0x3: fcmovnu();
                default: fistp();
            }
            0x4: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x2: fnclex();
                    0x3: fninit();
                    default: Inst::UD2();
                }
                default: Inst::UD2();
            }
            0x5: decode MODRM_MOD {
                // 'R' insists on having a size qualifier, so I picked 'q',
                // but I don't think it has any effect
                0x3: Inst::FUCOMI(Rq);
                // 80-bit load
                default: Inst::FLD80(M);
            }
            0x6: decode MODRM_MOD {
                0x3: fcomi();
                default: Inst::UD2();
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: Inst::FST80P(M);
            }
        }
        //0x4: esc4();
        0x4: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: Inst::FADD2(Eq);
                default: Inst::FADD2(Mq);
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::FMUL2(Eq);
                default: Inst::FMUL2(Mq);
            }
            0x2: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fcom();
            }
            0x3: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fcomp();
            }
            0x4: decode MODRM_MOD {
                0x3: fsubr();
                default: Inst::FSUB2(Mq);
            }
            0x5: decode MODRM_MOD {
                0x3: Inst::FSUB2(Eq);
                default: fsubr();
            }
            0x6: decode MODRM_MOD {
                0x3: fdivr();
                default: Inst::FDIV2(Mq);
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::FDIV2(Eq);
                default: fdivr();
            }
        }
        //0x5: esc5();
        0x5: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: ffree();
                // 64-bit load
                default: Inst::FLD(Mq);
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fisttp();
            }
            0x2: decode MODRM_MOD {
                0x3: Inst::FST(Eq);
                default: Inst::FST(Mq);
            }
            0x3: decode MODRM_MOD {
                0x3: Inst::FSTP(Eq);
                default: Inst::FSTP(Mq);
            }
            0x4: decode MODRM_MOD {
                0x3: fucom();
                default: frstor();
            }
            0x5: decode MODRM_MOD {
                0x3: fucomp();
                default: Inst::UD2();
            }
            0x6: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fnsave();
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: Inst::FNSTSW(Mw);
            }
        }
        //0x6: esc6();
        0x6: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x1: Inst::FADDP();
                    default: Inst::FADDP(Eq);
                }
                default: fiadd();
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::FMULP(Eq);
                default: fimul();
            }
            0x2: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: ficom();
            }
            0x3: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x1: fcompp();
                    default: Inst::UD2();
                }
                default: ficomp();
            }
            0x4: decode MODRM_MOD {
                0x3: fsubrp();
                default: fisub();
            }
            0x5: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x1: Inst::FSUBP();
                    default: Inst::FSUBP(Eq);
                }
                default: fisubr();
            }
            0x6: decode MODRM_MOD {
                0x3: fdivrp();
                default: fidiv();
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::FDIVP(Eq);
                default: fidivr();
            }
        }
        //0x7: esc7();
        0x7: decode MODRM_REG {
            0x0: decode MODRM_MOD {
                // The ffreep instruction isn't entirely real. It should work
                // the same as ffree but then also pop the register stack.
                0x3: ffreep();
                default: Inst::FILD(Mw); // 16-bit int
            }
            0x1: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fisttp();
            }
            0x2: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fist();
            }
            0x3: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fistp();
            }
            0x4: decode MODRM_MOD {
                0x3: decode MODRM_RM {
                    0x0: Inst::FNSTSW(rAw);
                    default: Inst::UD2();
                }
                default: fbld();
            }
            0x5: decode MODRM_MOD {
                // 'R' insists on having a size qualifier, so I picked 'q',
                // but I don't think it has any effect
                0x3: Inst::FUCOMIP(Rq);
                default: Inst::FILD(Mq); // 64-bit int
            }
            0x6: decode MODRM_MOD {
                0x3: fcomip();
                default: fbstp();
            }
            0x7: decode MODRM_MOD {
                0x3: Inst::UD2();
                default: fistp();
            }
        }
    }
}