Subversion Repositories or1k

/* op_i386.h -- i386 specific support routines for micro operations

   Copyright (C) 2005 György `nog' Jeney, nog@sdf.lonestar.org

This file is part of OpenRISC 1000 Architectural Simulator.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "common_i386.h"

#define OP_JUMP(x) asm("jmp *%0" : : "rm" (x))

#define FORCE_RET asm volatile ("")

/* Handles the scheduler and PC updateing.  Yes, useing MMX is a requirement. It

 * just won't change.  This must be as compact as possible */

#define HANDLE_SCHED(func, jmp) asm("paddd %%mm1, %%mm0\n" \

                                    "\tmovd %%mm0, %%eax\n" \

                                    "\ttestl %%eax, %%eax\n" \

                                    "\tjg ." jmp "\n" \

                                    "\tcall "#func"\n" \

                                    "\t." jmp ":" : : )

static inline int32_t do_cycles(void)

{

  register uint32_t cycles;

  asm("paddd %%mm1, %%mm0\n"

      "\tmovd %%mm0, %0\n"

      : "=r" (cycles));

  return cycles;

}

/* Joins runtime.sim.mem_cycles with the cycle counter */

static inline void join_mem_cycles(void)

{

  runtime.sim.mem_cycles = -runtime.sim.mem_cycles;

  asm volatile ("movd %0, %%mm2\n"

                "\tpaddd %%mm2, %%mm0"

                : : "m" (runtime.sim.mem_cycles));

  runtime.sim.mem_cycles = 0;

}

static inline void or_longjmp(void *loc) __attribute__((noreturn));

static inline void or_longjmp(void *loc)

{

  /* We push a trampoline address (dyn_ret_stack_prot) onto the stack to be able

   * to detect if any ret instructions found their way into an operation. */

  asm("\tmovl %0, %%eax\n"

      "\tmovl %1, %%esp\n"

      "\tmovl $%2, %%ebp\n"

      "\tpush $dyn_ret_stack_prot\n"

      "\tpush $dyn_ret_stack_prot\n"

      "\tpush $dyn_ret_stack_prot\n"

      "\tjmp *%%eax\n"

      :

      : "m" (loc),

        "m" (rec_stack_base),

        "m" (cpu_state));

}