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-rw-r--r--arch/m68k/math-emu/fp_move.S244
1 files changed, 244 insertions, 0 deletions
diff --git a/arch/m68k/math-emu/fp_move.S b/arch/m68k/math-emu/fp_move.S
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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
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