we32k.c

早期freebsd实现

/* Subroutines for insn-output.c for AT&T we32000 Family.
   Contributed by John Wehle ([e-mail])
   Copyright (C) 1991-1992 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC 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 1, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <stdio.h>
#include "config.h"
#include "rtl.h"
#include "real.h"


void output_move_double(operands)
rtx *operands;
  {
  rtx lsw_operands[2];
  rtx lsw_sreg = NULL;
  rtx msw_dreg = NULL;

  if (GET_CODE (operands[0]) == REG) {
    lsw_operands[0] = gen_rtx(REG, SImode, REGNO (operands[0]) + 1);
    msw_dreg = operands[0];
    }
  else
    if (GET_CODE (operands[0]) == MEM && offsettable_memref_p (operands[0]))
      lsw_operands[0] = adj_offsettable_operand(operands[0], 4);
    else
      abort();

  if (GET_CODE (operands[1]) == REG) {
    lsw_operands[1] = gen_rtx(REG, SImode, REGNO (operands[1]) + 1);
    lsw_sreg = lsw_operands[1];
    }
  else
    if (GET_CODE (operands[1]) == MEM && offsettable_memref_p (operands[1])) {
      lsw_operands[1] = adj_offsettable_operand(operands[1], 4);
      lsw_sreg = operands[1];
      for ( ; ; ) {
        if (REG_P (lsw_sreg))
          break;
        if (CONSTANT_ADDRESS_P (lsw_sreg)) {
          lsw_sreg = NULL;
          break;
          }
        if (GET_CODE (lsw_sreg) == MEM) {
          lsw_sreg = XEXP (lsw_sreg, 0);
          continue;
          }
        if (GET_CODE (lsw_sreg) == PLUS)
          if (CONSTANT_ADDRESS_P (XEXP (lsw_sreg, 1))) {
            lsw_sreg = XEXP (lsw_sreg, 0);
            continue;
            }
          else
            if (CONSTANT_ADDRESS_P (XEXP (lsw_sreg, 0))) {
              lsw_sreg = XEXP (lsw_sreg, 1);
              continue;
              }
        abort();
        }
      }
    else
      if (GET_CODE (operands[1]) == CONST_DOUBLE)
        {
        lsw_operands[1] = gen_rtx(CONST_INT, SImode,
                                  CONST_DOUBLE_HIGH(operands[1]));
        operands[1] = gen_rtx(CONST_INT, SImode,
                              CONST_DOUBLE_LOW(operands[1]));
        }
      else
        if (GET_CODE (operands[1]) == CONST_INT)
          {
          lsw_operands[1] = operands[1];
          operands[1] = const0_rtx;
          }
        else
          abort();

  if ( !msw_dreg || !lsw_sreg || REGNO (msw_dreg) != REGNO (lsw_sreg)) {
    output_asm_insn("movw %1, %0", operands);
    output_asm_insn("movw %1, %0", lsw_operands);
    }
  else {
    output_asm_insn("movw %1, %0", lsw_operands);
    output_asm_insn("movw %1, %0", operands);
    }
  }

void output_push_double(operands)
rtx *operands;
  {
  rtx lsw_operands[1];

  if (GET_CODE (operands[0]) == REG)
    lsw_operands[0] = gen_rtx(REG, SImode, REGNO (operands[0]) + 1);
  else
    if (GET_CODE (operands[0]) == MEM && offsettable_memref_p (operands[0]))
      lsw_operands[0] = adj_offsettable_operand(operands[0], 4);
    else
      if (GET_CODE (operands[0]) == CONST_DOUBLE)
        {
        lsw_operands[0] = gen_rtx(CONST_INT, SImode,
                                  CONST_DOUBLE_HIGH(operands[0]));
        operands[0] = gen_rtx(CONST_INT, SImode,
                              CONST_DOUBLE_LOW(operands[0]));
        }
      else
        if (GET_CODE (operands[0]) == CONST_INT)
          {
          lsw_operands[0] = operands[0];
          operands[0] = const0_rtx;
          }
        else
          abort();

  output_asm_insn("pushw %0", operands);
  output_asm_insn("pushw %0", lsw_operands);
  }