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

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// Redistribution and use of this software in source and binary forms,
// with or without modification, are permitted provided that the
// following conditions are met:
//
// The software must be used only for Non-Commercial Use which means any
// use which is NOT directed to receiving any direct monetary
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//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.  Redistributions
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.  No right of
// sublicense is granted herewith.  Derivatives of the software and
// output created using the software may be prepared, but only for
// Non-Commercial Uses.  Derivatives of the software may be shared with
// others provided: (i) the others agree to abide by the list of
// conditions herein which includes the Non-Commercial Use restrictions;
// and (ii) such Derivatives of the software include the above copyright
// notice to acknowledge the contribution from this software where
// applicable, this list of conditions and the disclaimer below.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// Authors: Gabe Black

0x1B: decode OPCODE_OP_BOTTOM3 {
    //0x0: esc0();
    0x0: decode MODRM_REG {
        0x0: fadd();
        0x1: fmul();
        0x2: fcom();
        0x3: fcomp();
        0x4: fsub();
        0x5: fsubr();
        0x6: fdiv();
        0x7: fdivr();
    }
    //0x1: esc1();
    0x1: decode MODRM_REG {
        0x0: fld();
        0x1: decode MODRM_MOD {
            0x3: fxch();
            default: Inst::UD2();
        }
        0x2: decode MODRM_MOD {
            0x3: decode MODRM_RM {
                0x0: fnop();
                default: Inst::UD2();
            }
            default: fst();
        }
        0x3: decode MODRM_MOD {
            0x3: Inst::UD2();
            default: fstp();
        }
        0x4: decode MODRM_MOD {
            0x3: decode MODRM_RM {
                0x0: fchs();
                0x1: fabs();
                0x4: ftst();
                0x5: fxam();
                default: Inst::UD2();
            }
            default: fldenv();
        }
        0x5: decode MODRM_MOD {
            0x3: decode MODRM_RM {
                0x0: fld1();
                0x1: fldl2t();
                0x2: fldl2e();
                0x3: fldpi();
                0x4: fldlg2();
                0x5: fldln2();
                0x6: fldz();
            }
            default: fldcw();
        }
        0x6: decode MODRM_MOD {
            0x3: decode MODRM_RM {
                0x0: f2xm1();
                0x1: fyl2x();
                0x2: fptan();
                0x3: fpatan();
                0x4: fxtract();
                0x5: fprem1();
                0x6: fdecstp();
                0x7: fincstp();
            }
            default: fnstenv();
        }
        0x7: decode MODRM_MOD {
            0x3: decode MODRM_RM {
                0x0: fprem();
                0x1: fyl2xp1();
                0x2: fsqrt();
                0x3: fsincos();
                0x4: frndint();
                0x5: fscale();
                0x6: fsin();
                0x7: fcos();
            }
            default: fnstcw();
        }
    }
    //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: fild();
        }
        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 {
            0x3: fucomi();
            default: fld();
        }
        0x6: decode MODRM_MOD {
            0x3: fcomi();
            default: Inst::UD2();
        }
        0x7: decode MODRM_MOD {
            0x3: Inst::UD2();
            default: fstp();
        }
    }
    //0x4: esc4();
    0x4: decode MODRM_REG {
        0x0: fadd();
        0x1: fmul();
        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: fsub();
        }
        0x5: decode MODRM_MOD {
            0x3: fsub();
            default: fsubr();
        }
        0x6: decode MODRM_MOD {
            0x3: fdivr();
            default: fdiv();
        }
        0x7: decode MODRM_MOD {
            0x3: fdiv();
            default: fdivr();
        }
    }
    //0x5: esc5();
    0x5: decode MODRM_REG {
        0x0: decode MODRM_MOD {
            0x3: ffree();
            default: fld();
        }
        0x1: decode MODRM_MOD {
            0x3: Inst::UD2();
            default: fisttp();
        }
        0x2: fst();
        0x3: fstp();
        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: fnstsw();
        }
    }
    //0x6: esc6();
    0x6: decode MODRM_REG {
        0x0: decode MODRM_MOD {
            0x3: faddp();
            default: fiadd();
        }
        0x1: decode MODRM_MOD {
            0x3: fmulp();
            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: fsubp();
            default: fisubr();
        }
        0x6: decode MODRM_MOD {
            0x3: fdivrp();
            default: fidiv();
        }
        0x7: decode MODRM_MOD {
            0x3: fdivp();
            default: fidivr();
        }
    }
    //0x7: esc7();
    0x7: decode MODRM_REG {
        0x0: decode MODRM_MOD {
            0x3: Inst::UD2();
            default: fild();
        }
        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: fnstsw();
                default: Inst::UD2();
            }
            default: fbld();
        }
        0x5: decode MODRM_MOD {
            0x3: fucomip();
            default: fild();
        }
        0x6: decode MODRM_MOD {
            0x3: fcomip();
            default: fbstp();
        }
        0x7: decode MODRM_MOD {
            0x3: Inst::UD2();
            default: fistp();
        }
    }
}