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

// Copyright (c) 2007 The Hewlett-Packard Development Company
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// Authors: Gabe Black

////////////////////////////////////////////////////////////////////
//
// Decode the two byte opcodes
//
0x2: decode OPCODE_PREFIXA {
    0x0F: decode OPCODE_OP_TOP5 {
        format WarnUnimpl {
            0x00: decode OPCODE_OP_BOTTOM3 {
                0x00: group6();
                0x01: group7();
                0x02: lar_Gv_Ew();
                0x03: lsl_Gv_Ew();
                //sandpile.org doesn't seem to know what this is... ?
                0x04: loadall_or_reset_or_hang();
#if FULL_SYSTEM
                0x05: syscall();
#else
                0x05: SyscallInst::syscall('xc->syscall(rax)');
#endif
                0x06: clts();
                //sandpile.org says (AMD) after sysret, so I might want to check
                //if that means amd64 or AMD machines
                0x07: loadall_or_sysret();
            }
            0x01: decode OPCODE_OP_BOTTOM3 {
                0x0: invd();
                0x1: wbinvd();
                0x2: Inst::UD2();
                0x3: Inst::UD2();
                0x4: Inst::UD2();
                0x5: threednow();
                0x6: threednow();
                0x7: threednow();
            }
            0x02: decode LEGACY_DECODEVAL {
                // no prefix
                0x0: decode OPCODE_OP_BOTTOM3 {
                    0x0: holder();
                    0x1: holder();
                    0x2: holder();
                    0x3: holder();
                    0x4: holder();
                    0x5: holder();
                    0x6: holder();
                    0x7: holder();
                }
                // repe (0xF3)
                0x4: decode OPCODE_OP_BOTTOM3 {
                    0x0: holder();
                    0x1: holder();
                    0x2: holder();
                    0x3: holder();
                    0x4: holder();
                    0x5: holder();
                    0x6: holder();
                    0x7: holder();
                }
                // operand size (0x66)
                0x1: decode OPCODE_OP_BOTTOM3 {
                    0x0: holder();
                    0x1: holder();
                    0x2: holder();
                    0x3: holder();
                    0x4: holder();
                    0x5: holder();
                    0x6: holder();
                    0x7: holder();
                }
                // repne (0xF2)
                0x8: decode OPCODE_OP_BOTTOM3 {
                    0x0: holder();
                    0x1: holder();
                    0x2: holder();
                    0x3: holder();
                    0x4: holder();
                    0x5: holder();
                    0x6: holder();
                    0x7: holder();
                }
                default: Inst::UD2();
            }
            0x03: decode OPCODE_OP_BOTTOM3 {
                0x0: group17();
                0x1: group17();
                0x2: group17();
                0x3: group17();
                0x4: group17();
                0x5: group17();
                0x6: group17();
                0x7: group17();
            }
            0x04: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x05: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x06: decode OPCODE_OP_BOTTOM3 {
                0x0: wrmsr();
                0x1: rdtsc();
                0x2: rdmsr();
                0x3: rdpmc();
                0x4: sysenter();
                0x5: sysexit();
                0x6: Inst::UD2();
                0x7: getsec();
            }
            0x07: decode OPCODE_OP_BOTTOM3 {
                0x0: three_byte_opcode();
                0x1: three_byte_opcode();
                0x2: three_byte_opcode();
                0x3: three_byte_opcode();
                0x4: three_byte_opcode();
                0x5: three_byte_opcode();
                0x6: three_byte_opcode();
                0x7: three_byte_opcode();
            }
            format Inst {
                0x08: decode OPCODE_OP_BOTTOM3 {
                    0x0: CMOVO(Gv,Ev);
                    0x1: CMOVNO(Gv,Ev);
                    0x2: CMOVB(Gv,Ev);
                    0x3: CMOVNB(Gv,Ev);
                    0x4: CMOVZ(Gv,Ev);
                    0x5: CMOVNZ(Gv,Ev);
                    0x6: CMOVBE(Gv,Ev);
                    0x7: CMOVNBE(Gv,Ev);
                }
                0x09: decode OPCODE_OP_BOTTOM3 {
                    0x0: CMOVS(Gv,Ev);
                    0x1: CMOVNS(Gv,Ev);
                    0x2: CMOVP(Gv,Ev);
                    0x3: CMOVNP(Gv,Ev);
                    0x4: CMOVL(Gv,Ev);
                    0x5: CMOVNL(Gv,Ev);
                    0x6: CMOVLE(Gv,Ev);
                    0x7: CMOVNLE(Gv,Ev);
                }
            }
            0x0A: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x0B: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x0C: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x0D: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x0E: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x0F: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            format Inst {
                0x10: decode OPCODE_OP_BOTTOM3 {
                    0x0: JO(Jz);
                    0x1: JNO(Jz);
                    0x2: JB(Jz);
                    0x3: JNB(Jz);
                    0x4: JZ(Jz);
                    0x5: JNZ(Jz);
                    0x6: JBE(Jz);
                    0x7: JNBE(Jz);
                }
                0x11: decode OPCODE_OP_BOTTOM3 {
                    0x0: JS(Jz);
                    0x1: JNS(Jz);
                    0x2: JP(Jz);
                    0x3: JNP(Jz);
                    0x4: JL(Jz);
                    0x5: JNL(Jz);
                    0x6: JLE(Jz);
                    0x7: JNLE(Jz);
                }
                0x12: decode OPCODE_OP_BOTTOM3 {
                    0x0: SETO(Eb);
                    0x1: SETNO(Eb);
                    0x2: SETB(Eb);
                    0x3: SETNB(Eb);
                    0x4: SETZ(Eb);
                    0x5: SETNZ(Eb);
                    0x6: SETBE(Eb);
                    0x7: SETNBE(Eb);
                }
                0x13: decode OPCODE_OP_BOTTOM3 {
                    0x0: SETS(Eb);
                    0x1: SETNS(Eb);
                    0x2: SETP(Eb);
                    0x3: SETNP(Eb);
                    0x4: SETL(Eb);
                    0x5: SETNL(Eb);
                    0x6: SETLE(Eb);
                    0x7: SETNLE(Eb);
                }
            }
            0x14: decode OPCODE_OP_BOTTOM3 {
                0x0: push_fs();
                0x1: pop_fs();
                0x2: Inst::CPUID(rAd);
                0x3: bt_Ev_Gv();
                0x4: shld_Ev_Gv_Ib();
                0x5: shld_Ev_Gv_rCl();
                0x6: xbts_and_cmpxchg();
                0x7: ibts_and_cmpxchg();
            }
            0x15: decode OPCODE_OP_BOTTOM3 {
                0x0: push_gs();
                0x1: pop_gs();
                0x2: rsm_smm();
                0x3: bts_Ev_Gv();
                0x4: shrd_Ev_Gv_Ib();
                0x5: shrd_Ev_Gv_rCl();
                0x6: group16();
                0x7: Inst::IMUL(Gv,Ev);
            }
            0x16: decode OPCODE_OP_BOTTOM3 {
                0x0: cmpxchg_Eb_Gb();
                0x1: cmpxchg_Ev_Gv();
                0x2: lss_Gz_Mp();
                0x3: btr_Ev_Gv();
                0x4: lfs_Gz_Mp();
                0x5: lgs_Gz_Mp();
                //The size of the second operand in these instructions should
                //really be "b" or "w", but it's set to v in order to have a
                //consistent register size. This shouldn't affect behavior.
                0x6: Inst::MOVZX_B(Gv,Ev);
                0x7: Inst::MOVZX_W(Gv,Ev);
            }
            0x17: decode OPCODE_OP_BOTTOM3 {
                0x0: jmpe_Jz(); // IA-64?
                0x1: group11_UD2();
                0x2: group8_Ev_Ib();
                0x3: btc_Ev_Gv();
                0x4: bsf_Gv_Ev();
                0x5: bsr_Gv_Ev();
                //The size of the second operand in these instructions should
                //really be "b" or "w", but it's set to v in order to have a
                //consistent register size. This shouldn't affect behavior.
                0x6: Inst::MOVSX_B(Gv,Ev);
                0x7: Inst::MOVSX_W(Gv,Ev);
            }
            0x18: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x19: bswap_B();
            0x1A: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x1B: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x1C: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x1D: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x1E: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            0x1F: decode OPCODE_OP_BOTTOM3 {
                0x0: holder();
                0x1: holder();
                0x2: holder();
                0x3: holder();
                0x4: holder();
                0x5: holder();
                0x6: holder();
                0x7: holder();
            }
            default: FailUnimpl::twoByteOps();
        }
    }
    default: M5InternalError::error(
        {{"Unexpected first opcode byte in two byte opcode!"}});
}