Archipelago » qemu

/*

 * Tiny Code Generator for QEMU

 *

 * Copyright (c) 2008 Fabrice Bellard

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#define TCG_TARGET_HPPA 1

#if defined(_PA_RISC1_1)

#define TCG_TARGET_REG_BITS 32

#else

#error unsupported

#endif

#define TCG_TARGET_WORDS_BIGENDIAN

#define TCG_TARGET_NB_REGS 32

enum {

    TCG_REG_R0 = 0,

    TCG_REG_R1,

    TCG_REG_RP,

    TCG_REG_R3,

    TCG_REG_R4,

    TCG_REG_R5,

    TCG_REG_R6,

    TCG_REG_R7,

    TCG_REG_R8,

    TCG_REG_R9,

    TCG_REG_R10,

    TCG_REG_R11,

    TCG_REG_R12,

    TCG_REG_R13,

    TCG_REG_R14,

    TCG_REG_R15,

    TCG_REG_R16,

    TCG_REG_R17,

    TCG_REG_R18,

    TCG_REG_R19,

    TCG_REG_R20,

    TCG_REG_R21,

    TCG_REG_R22,

    TCG_REG_R23,

    TCG_REG_R24,

    TCG_REG_R25,

    TCG_REG_R26,

    TCG_REG_DP,

    TCG_REG_RET0,

    TCG_REG_RET1,

    TCG_REG_SP,

    TCG_REG_R31,

};

/* used for function call generation */

#define TCG_REG_CALL_STACK TCG_REG_SP

#define TCG_TARGET_STACK_ALIGN 16

#define TCG_TARGET_STACK_GROWSUP

/* optional instructions */

//#define TCG_TARGET_HAS_ext8s_i32

//#define TCG_TARGET_HAS_ext16s_i32

//#define TCG_TARGET_HAS_bswap16_i32

//#define TCG_TARGET_HAS_bswap_i32

/* Note: must be synced with dyngen-exec.h */

#define TCG_AREG0 TCG_REG_R17

#define TCG_AREG1 TCG_REG_R14

#define TCG_AREG2 TCG_REG_R15

#define TCG_AREG3 TCG_REG_R16

static inline void flush_icache_range(unsigned long start, unsigned long stop)

{

    start &= ~31;

    while (start <= stop)

    {

        asm volatile ("fdc 0(%0)\n"

                      "sync\n"

                      "fic 0(%%sr4, %0)\n"

                      "sync\n"

                      : : "r"(start) : "memory");

        start += 32;

    }

}

/* supplied by libgcc */

extern void *__canonicalize_funcptr_for_compare(void *);

/* Field selection types defined by hppa */

#define rnd(x)                  (((x)+0x1000)&~0x1fff)

/* lsel: select left 21 bits */

#define lsel(v,a)               (((v)+(a))>>11)

/* rsel: select right 11 bits */

#define rsel(v,a)               (((v)+(a))&0x7ff)

/* lrsel with rounding of addend to nearest 8k */

#define lrsel(v,a)              (((v)+rnd(a))>>11)

/* rrsel with rounding of addend to nearest 8k */

#define rrsel(v,a)              ((((v)+rnd(a))&0x7ff)+((a)-rnd(a)))

#define mask(x,sz)              ((x) & ~((1<<(sz))-1))

static inline int reassemble_12(int as12)

{

    return (((as12 & 0x800) >> 11) |

            ((as12 & 0x400) >> 8) |

            ((as12 & 0x3ff) << 3));

}

static inline int reassemble_14(int as14)

{

    return (((as14 & 0x1fff) << 1) |

            ((as14 & 0x2000) >> 13));

}

static inline int reassemble_17(int as17)

{

    return (((as17 & 0x10000) >> 16) |

            ((as17 & 0x0f800) << 5) |

            ((as17 & 0x00400) >> 8) |

            ((as17 & 0x003ff) << 3));

}

static inline int reassemble_21(int as21)

{

    return (((as21 & 0x100000) >> 20) |

            ((as21 & 0x0ffe00) >> 8) |

            ((as21 & 0x000180) << 7) |

            ((as21 & 0x00007c) << 14) |

            ((as21 & 0x000003) << 12));

}

static inline void hppa_patch21l(uint32_t *insn, int val, int addend)

{

    val = lrsel(val, addend);

    *insn = mask(*insn, 21) | reassemble_21(val);

}

static inline void hppa_patch14r(uint32_t *insn, int val, int addend)

{

    val = rrsel(val, addend);

    *insn = mask(*insn, 14) | reassemble_14(val);

}

static inline void hppa_patch17r(uint32_t *insn, int val, int addend)

{

    val = rrsel(val, addend);

    *insn = (*insn & ~0x1f1ffd) | reassemble_17(val);

}

static inline void hppa_patch21l_dprel(uint32_t *insn, int val, int addend)

{

    register unsigned int dp asm("r27");

    hppa_patch21l(insn, val - dp, addend);

}

static inline void hppa_patch14r_dprel(uint32_t *insn, int val, int addend)

{

    register unsigned int dp asm("r27");

    hppa_patch14r(insn, val - dp, addend);

}

static inline void hppa_patch17f(uint32_t *insn, int val, int addend)

{

    int dot = (int)insn & ~0x3;

    int v = ((val + addend) - dot - 8) / 4;

    if (v > (1 << 16) || v < -(1 << 16)) {

        printf("cannot fit branch to offset %d [%08x->%08x]\n", v, dot, val);

        abort();

    }

    *insn = (*insn & ~0x1f1ffd) | reassemble_17(v);

}

static inline void hppa_load_imm21l(uint32_t *insn, int val, int addend)

{

    /* Transform addil L'sym(%dp) to ldil L'val, %r1 */

    *insn = 0x20200000 | reassemble_21(lrsel(val, 0));

}

static inline void hppa_load_imm14r(uint32_t *insn, int val, int addend)

{

    /* Transform ldw R'sym(%r1), %rN to ldo R'sym(%r1), %rN */

    hppa_patch14r(insn, val, addend);

    /* HACK */

    if (addend == 0)

        *insn = (*insn & ~0xfc000000) | (0x0d << 26);

}