Archipelago » qemu

/*

 *  PowerPC emulation micro-operations helpers for qemu.

 * 

 *  Copyright (c) 2003-2007 Jocelyn Mayer

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

/* Multiple word / string load and store */

static inline target_ulong glue(ld32r, MEMSUFFIX) (target_ulong EA)

{

    uint32_t tmp = glue(ldl, MEMSUFFIX)(EA);

    return ((tmp & 0xFF000000UL) >> 24) | ((tmp & 0x00FF0000UL) >> 8) |

        ((tmp & 0x0000FF00UL) << 8) | ((tmp & 0x000000FFUL) << 24);

}

static inline void glue(st32r, MEMSUFFIX) (target_ulong EA, target_ulong data)

{

    uint32_t tmp =

        ((data & 0xFF000000UL) >> 24) | ((data & 0x00FF0000UL) >> 8) |

        ((data & 0x0000FF00UL) << 8) | ((data & 0x000000FFUL) << 24);

    glue(stl, MEMSUFFIX)(EA, tmp);

}

void glue(do_lmw, MEMSUFFIX) (int dst)

{

    for (; dst < 32; dst++, T0 += 4) {

        ugpr(dst) = glue(ldl, MEMSUFFIX)(T0);

    }

}

void glue(do_stmw, MEMSUFFIX) (int src)

{

    for (; src < 32; src++, T0 += 4) {

        glue(stl, MEMSUFFIX)(T0, ugpr(src));

    }

}

void glue(do_lmw_le, MEMSUFFIX) (int dst)

{

    for (; dst < 32; dst++, T0 += 4) {

        ugpr(dst) = glue(ld32r, MEMSUFFIX)(T0);

    }

}

void glue(do_stmw_le, MEMSUFFIX) (int src)

{

    for (; src < 32; src++, T0 += 4) {

        glue(st32r, MEMSUFFIX)(T0, ugpr(src));

    }

}

void glue(do_lsw, MEMSUFFIX) (int dst)

{

    uint32_t tmp;

    int sh;

    for (; T1 > 3; T1 -= 4, T0 += 4) {

        ugpr(dst++) = glue(ldl, MEMSUFFIX)(T0);

        if (unlikely(dst == 32))

            dst = 0;

    }

    if (unlikely(T1 != 0)) {

        tmp = 0;

        for (sh = 24; T1 > 0; T1--, T0++, sh -= 8) {

            tmp |= glue(ldub, MEMSUFFIX)(T0) << sh;

        }

        ugpr(dst) = tmp;

    }

}

void glue(do_stsw, MEMSUFFIX) (int src)

{

    int sh;

    for (; T1 > 3; T1 -= 4, T0 += 4) {

        glue(stl, MEMSUFFIX)(T0, ugpr(src++));

        if (unlikely(src == 32))

            src = 0;

    }

    if (unlikely(T1 != 0)) {

        for (sh = 24; T1 > 0; T1--, T0++, sh -= 8)

            glue(stb, MEMSUFFIX)(T0, (ugpr(src) >> sh) & 0xFF);

    }

}

void glue(do_lsw_le, MEMSUFFIX) (int dst)

{

    uint32_t tmp;

    int sh;

    for (; T1 > 3; T1 -= 4, T0 += 4) {

        ugpr(dst++) = glue(ld32r, MEMSUFFIX)(T0);

        if (unlikely(dst == 32))

            dst = 0;

    }

    if (unlikely(T1 != 0)) {

        tmp = 0;

        for (sh = 0; T1 > 0; T1--, T0++, sh += 8) {

            tmp |= glue(ldub, MEMSUFFIX)(T0) << sh;

        }

        ugpr(dst) = tmp;

    }

}

void glue(do_stsw_le, MEMSUFFIX) (int src)

{

    int sh;

    for (; T1 > 3; T1 -= 4, T0 += 4) {

        glue(st32r, MEMSUFFIX)(T0, ugpr(src++));

        if (unlikely(src == 32))

            src = 0;

    }

    if (unlikely(T1 != 0)) {

        for (sh = 0; T1 > 0; T1--, T0++, sh += 8)

            glue(stb, MEMSUFFIX)(T0, (ugpr(src) >> sh) & 0xFF);

    }

}

/* PPC 601 specific instructions (POWER bridge) */

// XXX: to be tested

void glue(do_POWER_lscbx, MEMSUFFIX) (int dest, int ra, int rb)

{

    int i, c, d, reg;

    d = 24;

    reg = dest;

    for (i = 0; i < T1; i++) {

        c = glue(ldub, MEMSUFFIX)(T0++);

        /* ra (if not 0) and rb are never modified */

        if (likely(reg != rb && (ra == 0 || reg != ra))) {

            ugpr(reg) = (ugpr(reg) & ~(0xFF << d)) | (c << d);

        }

        if (unlikely(c == T2))

            break;

        if (likely(d != 0)) {

            d -= 8;

        } else {

            d = 24;

            reg++;

            reg = reg & 0x1F;

        }

    }

    T0 = i;

}

/* XXX: TAGs are not managed */

void glue(do_POWER2_lfq, MEMSUFFIX) (void)

{

    FT0 = glue(ldfq, MEMSUFFIX)(T0);

    FT1 = glue(ldfq, MEMSUFFIX)(T0 + 4);

}

static inline double glue(ldfqr, MEMSUFFIX) (target_ulong EA)

{

    union {

        double d;

        uint64_t u;

    } u;

    u.d = glue(ldfq, MEMSUFFIX)(EA);

    u.u = ((u.u & 0xFF00000000000000ULL) >> 56) |

        ((u.u & 0x00FF000000000000ULL) >> 40) |

        ((u.u & 0x0000FF0000000000ULL) >> 24) |

        ((u.u & 0x000000FF00000000ULL) >> 8) |

        ((u.u & 0x00000000FF000000ULL) << 8) |

        ((u.u & 0x0000000000FF0000ULL) << 24) |

        ((u.u & 0x000000000000FF00ULL) << 40) |

        ((u.u & 0x00000000000000FFULL) << 56);

    return u.d;

}

void glue(do_POWER2_lfq_le, MEMSUFFIX) (void)

{

    FT0 = glue(ldfqr, MEMSUFFIX)(T0 + 4);

    FT1 = glue(ldfqr, MEMSUFFIX)(T0);

}

void glue(do_POWER2_stfq, MEMSUFFIX) (void)

{

    glue(stfq, MEMSUFFIX)(T0, FT0);

    glue(stfq, MEMSUFFIX)(T0 + 4, FT1);

}

static inline void glue(stfqr, MEMSUFFIX) (target_ulong EA, double d)

{

    union {

        double d;

        uint64_t u;

    } u;

    u.d = d;

    u.u = ((u.u & 0xFF00000000000000ULL) >> 56) |

        ((u.u & 0x00FF000000000000ULL) >> 40) |

        ((u.u & 0x0000FF0000000000ULL) >> 24) |

        ((u.u & 0x000000FF00000000ULL) >> 8) |

        ((u.u & 0x00000000FF000000ULL) << 8) |

        ((u.u & 0x0000000000FF0000ULL) << 24) |

        ((u.u & 0x000000000000FF00ULL) << 40) |

        ((u.u & 0x00000000000000FFULL) << 56);

    glue(stfq, MEMSUFFIX)(EA, u.d);

}

void glue(do_POWER2_stfq_le, MEMSUFFIX) (void)

{

    glue(stfqr, MEMSUFFIX)(T0 + 4, FT0);

    glue(stfqr, MEMSUFFIX)(T0, FT1);

}

#undef MEMSUFFIX