fp_move.S
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上传日期:2013-04-10
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- /*
- * fp_move.S
- *
- * Copyright Roman Zippel, 1997. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, and the entire permission notice in its entirety,
- * including the disclaimer of warranties.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * ALTERNATIVELY, this product may be distributed under the terms of
- * the GNU General Public License, in which case the provisions of the GPL are
- * required INSTEAD OF the above restrictions. (This clause is
- * necessary due to a potential bad interaction between the GPL and
- * the restrictions contained in a BSD-style copyright.)
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include "fp_emu.h"
- #include "fp_decode.h"
- do_no_pc_mode=1
- .globl fp_fmove_fp2mem
- fp_fmove_fp2mem:
- clr.b (2+FPD_FPSR,FPDATA)
- fp_decode_dest_format
- move.w %d0,%d1 | store data size twice in %d1
- swap %d1 | one can be trashed below
- move.w %d0,%d1
- #ifdef FPU_EMU_DEBUG
- lea 0f,%a0
- clr.l %d0
- move.b (%a0,%d1.w),%d0
- printf PDECODE,"fmove.%c ",1,%d0
- fp_decode_src_reg
- printf PDECODE,"fp%d,",1,%d0
- .data
- 0: .byte 'l','s','x','p','w','d','b','p'
- .previous
- #endif
- | encode addressing mode for dest
- fp_decode_addr_mode
- .long fp_data, fp_ill
- .long fp_indirect, fp_postinc
- .long fp_predecr, fp_disp16
- .long fp_extmode0, fp_extmode1
- | addressing mode: data register direct
- fp_data:
- fp_mode_data_direct
- move.w %d0,%d1
- fp_decode_src_reg
- fp_get_fp_reg
- lea (FPD_TEMPFP1,FPDATA),%a1
- move.l (%a0)+,(%a1)+
- move.l (%a0)+,(%a1)+
- move.l (%a0),(%a1)
- lea (-8,%a1),%a0
- swap %d1
- move.l %d1,%d2
- printf PDECODE,"n"
- jmp ([0f:w,%pc,%d1.w*4])
- .align 4
- 0:
- .long fp_data_long, fp_data_single
- .long fp_ill, fp_ill
- .long fp_data_word, fp_ill
- .long fp_data_byte, fp_ill
- fp_data_byte:
- jsr fp_normalize_ext
- jsr fp_conv_ext2byte
- move.l %d0,%d1
- swap %d2
- move.w %d2,%d0
- jsr fp_get_data_reg
- move.b %d1,%d0
- move.w %d2,%d1
- jsr fp_put_data_reg
- jra fp_final
- fp_data_word:
- jsr fp_normalize_ext
- jsr fp_conv_ext2short
- move.l %d0,%d1
- swap %d2
- move.w %d2,%d0
- jsr fp_get_data_reg
- move.w %d1,%d0
- move.l %d2,%d1
- jsr fp_put_data_reg
- jra fp_final
- fp_data_long:
- jsr fp_normalize_ext
- jsr fp_conv_ext2long
- swap %d2
- move.w %d2,%d1
- jsr fp_put_data_reg
- jra fp_final
- fp_data_single:
- jsr fp_normalize_ext
- jsr fp_conv_ext2single
- swap %d2
- move.w %d2,%d1
- jsr fp_put_data_reg
- jra fp_final
- | addressing mode: address register indirect
- fp_indirect:
- fp_mode_addr_indirect
- jra fp_putdest
- | addressing mode: address register indirect with postincrement
- fp_postinc:
- fp_mode_addr_indirect_postinc
- jra fp_putdest
- | addressing mode: address register indirect with predecrement
- fp_predecr:
- fp_mode_addr_indirect_predec
- jra fp_putdest
- | addressing mode: address register indirect with 16bit displacement
- fp_disp16:
- fp_mode_addr_indirect_disp16
- jra fp_putdest
- fp_extmode0:
- fp_mode_addr_indirect_extmode0
- jra fp_putdest
- fp_extmode1:
- fp_decode_addr_reg
- jmp ([0f:w,%pc,%d0*4])
- .align 4
- 0:
- .long fp_abs_short, fp_abs_long
- .long fp_ill, fp_ill
- .long fp_ill, fp_ill
- .long fp_ill, fp_ill
- fp_abs_short:
- fp_mode_abs_short
- jra fp_putdest
- fp_abs_long:
- fp_mode_abs_long
- jra fp_putdest
- fp_putdest:
- move.l %a0,%a1
- fp_decode_src_reg
- move.l %d1,%d2 | save size
- fp_get_fp_reg
- printf PDECODE,"n"
- addq.l #8,%a0
- move.l (%a0),-(%sp)
- move.l -(%a0),-(%sp)
- move.l -(%a0),-(%sp)
- move.l %sp,%a0
- jsr fp_normalize_ext
- swap %d2
- jmp ([0f:w,%pc,%d2.w*4])
- .align 4
- 0:
- .long fp_format_long, fp_format_single
- .long fp_format_extended, fp_format_packed
- .long fp_format_word, fp_format_double
- .long fp_format_byte, fp_format_packed
- fp_format_long:
- jsr fp_conv_ext2long
- putuser.l %d0,(%a1),fp_err_ua1,%a1
- jra fp_finish_move
- fp_format_single:
- jsr fp_conv_ext2single
- putuser.l %d0,(%a1),fp_err_ua1,%a1
- jra fp_finish_move
- fp_format_extended:
- move.l (%a0)+,%d0
- lsl.w #1,%d0
- lsl.l #7,%d0
- lsl.l #8,%d0
- putuser.l %d0,(%a1)+,fp_err_ua1,%a1
- move.l (%a0)+,%d0
- putuser.l %d0,(%a1)+,fp_err_ua1,%a1
- move.l (%a0),%d0
- putuser.l %d0,(%a1),fp_err_ua1,%a1
- jra fp_finish_move
- fp_format_packed:
- /* not supported yet */
- lea (12,%sp),%sp
- jra fp_ill
- fp_format_word:
- jsr fp_conv_ext2short
- putuser.w %d0,(%a1),fp_err_ua1,%a1
- jra fp_finish_move
- fp_format_double:
- jsr fp_conv_ext2double
- jra fp_finish_move
- fp_format_byte:
- jsr fp_conv_ext2byte
- putuser.b %d0,(%a1),fp_err_ua1,%a1
- | jra fp_finish_move
- fp_finish_move:
- lea (12,%sp),%sp
- jra fp_final