/*
* fp_emu . 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 <linux/linkage.h>
#include <asm/entry.h>
#include "fp_emu.h"
.globl fpu_emu
.globl fp_debugprint
.globl fp_err_ua1,fp_err_ua2
.text
fpu_emu:
SAVE_ALL_INT
GET_CURRENT(%d0)
#if defined(CPU_M68020_OR_M68030) && defined(CPU_M68040_OR_M68060)
tst.l m68k_is040or060
jeq 1 f
#endif
#if defined(CPU_M68040_OR_M68060)
move.l (FPS_PC2,%sp),(FPS_PC,%sp)
#endif
1 :
| emulate the instruction
jsr fp_scan
#if defined(CONFIG_M68060)
#if !defined(CPU_M68060_ONLY)
btst #3 ,m68k_cputype+3
jeq 1 f
#endif
btst #7 ,(FPS_SR,%sp)
jne fp_sendtrace060
#endif
1 :
| emulation successful?
tst.l %d0
jeq ret_from_exception
| send some signal to program here
jra ret_from_exception
| we jump here after an access error while trying to access
| user space, we correct stackpointer and send a SIGSEGV to
| the user process
fp_err_ua2:
addq.l #4 ,%sp
fp_err_ua1:
addq.l #4 ,%sp
move.l %a0,-(%sp)
pea LSEGV_MAPERR
pea LSIGSEGV
jsr fpemu_signal
add.w #12 ,%sp
jra ret_from_exception
#if defined(CONFIG_M68060)
| send a trace signal if we are debugged
| it does not really belong here, but...
fp_sendtrace060:
move.l (FPS_PC,%sp),-(%sp)
pea LTRAP_TRACE
pea LSIGTRAP
jsr fpemu_signal
add.w #12 ,%sp
jra ret_from_exception
#endif
.globl fp_get_data_reg, fp_put_data_reg
.globl fp_get_addr_reg, fp_put_addr_reg
| Entry points to get/put a register. Some of them can be get/put
| directly, others are on the stack, as we read/write the stack
| directly here, these function may only be called from within
| instruction decoding, otherwise the stack pointer is incorrect
| and the stack gets corrupted.
fp_get_data_reg:
jmp ([0 f:w,%pc,%d0.w*4 ])
.align 4
0 :
.long fp_get_d0, fp_get_d1
.long fp_get_d2, fp_get_d3
.long fp_get_d4, fp_get_d5
.long fp_get_d6, fp_get_d7
fp_get_d0:
move.l (PT_OFF_D0+8 ,%sp),%d0
printf PREGISTER,"{d0->%08x}" ,1 ,%d0
rts
fp_get_d1:
move.l (PT_OFF_D1+8 ,%sp),%d0
printf PREGISTER,"{d1->%08x}" ,1 ,%d0
rts
fp_get_d2:
move.l (PT_OFF_D2+8 ,%sp),%d0
printf PREGISTER,"{d2->%08x}" ,1 ,%d0
rts
fp_get_d3:
move.l %d3,%d0
printf PREGISTER,"{d3->%08x}" ,1 ,%d0
rts
fp_get_d4:
move.l %d4,%d0
printf PREGISTER,"{d4->%08x}" ,1 ,%d0
rts
fp_get_d5:
move.l %d5,%d0
printf PREGISTER,"{d5->%08x}" ,1 ,%d0
rts
fp_get_d6:
move.l %d6,%d0
printf PREGISTER,"{d6->%08x}" ,1 ,%d0
rts
fp_get_d7:
move.l %d7,%d0
printf PREGISTER,"{d7->%08x}" ,1 ,%d0
rts
fp_put_data_reg:
jmp ([0 f:w,%pc,%d1.w*4 ])
.align 4
0 :
.long fp_put_d0, fp_put_d1
.long fp_put_d2, fp_put_d3
.long fp_put_d4, fp_put_d5
.long fp_put_d6, fp_put_d7
fp_put_d0:
printf PREGISTER,"{d0<-%08x}" ,1 ,%d0
move.l %d0,(PT_OFF_D0+8 ,%sp)
rts
fp_put_d1:
printf PREGISTER,"{d1<-%08x}" ,1 ,%d0
move.l %d0,(PT_OFF_D1+8 ,%sp)
rts
fp_put_d2:
printf PREGISTER,"{d2<-%08x}" ,1 ,%d0
move.l %d0,(PT_OFF_D2+8 ,%sp)
rts
fp_put_d3:
printf PREGISTER,"{d3<-%08x}" ,1 ,%d0
| move.l %d0,%d3
move.l %d0,(PT_OFF_D3+8 ,%sp)
rts
fp_put_d4:
printf PREGISTER,"{d4<-%08x}" ,1 ,%d0
| move.l %d0,%d4
move.l %d0,(PT_OFF_D4+8 ,%sp)
rts
fp_put_d5:
printf PREGISTER,"{d5<-%08x}" ,1 ,%d0
| move.l %d0,%d5
move.l %d0,(PT_OFF_D5+8 ,%sp)
rts
fp_put_d6:
printf PREGISTER,"{d6<-%08x}" ,1 ,%d0
move.l %d0,%d6
rts
fp_put_d7:
printf PREGISTER,"{d7<-%08x}" ,1 ,%d0
move.l %d0,%d7
rts
fp_get_addr_reg:
jmp ([0 f:w,%pc,%d0.w*4 ])
.align 4
0 :
.long fp_get_a0, fp_get_a1
.long fp_get_a2, fp_get_a3
.long fp_get_a4, fp_get_a5
.long fp_get_a6, fp_get_a7
fp_get_a0:
move.l (PT_OFF_A0+8 ,%sp),%a0
printf PREGISTER,"{a0->%08x}" ,1 ,%a0
rts
fp_get_a1:
move.l (PT_OFF_A1+8 ,%sp),%a0
printf PREGISTER,"{a1->%08x}" ,1 ,%a0
rts
fp_get_a2:
move.l (PT_OFF_A2+8 ,%sp),%a0
printf PREGISTER,"{a2->%08x}" ,1 ,%a0
rts
fp_get_a3:
move.l %a3,%a0
printf PREGISTER,"{a3->%08x}" ,1 ,%a0
rts
fp_get_a4:
move.l %a4,%a0
printf PREGISTER,"{a4->%08x}" ,1 ,%a0
rts
fp_get_a5:
move.l %a5,%a0
printf PREGISTER,"{a5->%08x}" ,1 ,%a0
rts
fp_get_a6:
move.l %a6,%a0
printf PREGISTER,"{a6->%08x}" ,1 ,%a0
rts
fp_get_a7:
move.l %usp,%a0
printf PREGISTER,"{a7->%08x}" ,1 ,%a0
rts
fp_put_addr_reg:
jmp ([0 f:w,%pc,%d0.w*4 ])
.align 4
0 :
.long fp_put_a0, fp_put_a1
.long fp_put_a2, fp_put_a3
.long fp_put_a4, fp_put_a5
.long fp_put_a6, fp_put_a7
fp_put_a0:
printf PREGISTER,"{a0<-%08x}" ,1 ,%a0
move.l %a0,(PT_OFF_A0+8 ,%sp)
rts
fp_put_a1:
printf PREGISTER,"{a1<-%08x}" ,1 ,%a0
move.l %a0,(PT_OFF_A1+8 ,%sp)
rts
fp_put_a2:
printf PREGISTER,"{a2<-%08x}" ,1 ,%a0
move.l %a0,(PT_OFF_A2+8 ,%sp)
rts
fp_put_a3:
printf PREGISTER,"{a3<-%08x}" ,1 ,%a0
move.l %a0,%a3
rts
fp_put_a4:
printf PREGISTER,"{a4<-%08x}" ,1 ,%a0
move.l %a0,%a4
rts
fp_put_a5:
printf PREGISTER,"{a5<-%08x}" ,1 ,%a0
move.l %a0,%a5
rts
fp_put_a6:
printf PREGISTER,"{a6<-%08x}" ,1 ,%a0
move.l %a0,%a6
rts
fp_put_a7:
printf PREGISTER,"{a7<-%08x}" ,1 ,%a0
move.l %a0,%usp
rts
.data
.align 4
fp_debugprint:
| .long PMDECODE
.long PMINSTR+PMDECODE+PMCONV+PMNORM
| .long PMCONV+PMNORM+PMINSTR
| .long 0
Messung V0.5 in Prozent C=87 H=100 G=93
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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