mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
334 lines
5.5 KiB
ArmAsm
334 lines
5.5 KiB
ArmAsm
/*
|
|
* fp_cond.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"
|
|
|
|
.globl fp_fscc, fp_fbccw, fp_fbccl
|
|
|
|
#ifdef FPU_EMU_DEBUG
|
|
fp_fnop:
|
|
printf PDECODE,"fnop\n"
|
|
jra fp_end
|
|
#else
|
|
#define fp_fnop fp_end
|
|
#endif
|
|
|
|
fp_fbccw:
|
|
tst.w %d2
|
|
jeq fp_fnop
|
|
printf PDECODE,"fbccw "
|
|
fp_get_pc %a0
|
|
lea (-2,%a0,%d2.w),%a0
|
|
jra 1f
|
|
|
|
fp_fbccl:
|
|
printf PDECODE,"fbccl "
|
|
fp_get_pc %a0
|
|
move.l %d2,%d0
|
|
swap %d0
|
|
fp_get_instr_word %d0,fp_err_ua1
|
|
lea (-2,%a0,%d0.l),%a0
|
|
1: printf PDECODE,"%x",1,%a0
|
|
move.l %d2,%d0
|
|
swap %d0
|
|
jsr fp_compute_cond
|
|
tst.l %d0
|
|
jeq 1f
|
|
fp_put_pc %a0,1
|
|
1: printf PDECODE,"\n"
|
|
jra fp_end
|
|
|
|
fp_fdbcc:
|
|
printf PDECODE,"fdbcc "
|
|
fp_get_pc %a1 | calculate new pc
|
|
fp_get_instr_word %d0,fp_err_ua1
|
|
add.w %d0,%a1
|
|
fp_decode_addr_reg
|
|
printf PDECODE,"d%d,%x\n",2,%d0,%a1
|
|
swap %d1 | test condition in %d1
|
|
tst.w %d1
|
|
jne 2f
|
|
move.l %d0,%d1
|
|
jsr fp_get_data_reg
|
|
subq.w #1,%d0
|
|
jcs 1f
|
|
fp_put_pc %a1,1
|
|
1: jsr fp_put_data_reg
|
|
2: jra fp_end
|
|
|
|
| set flags for decode macros for fs<cc>
|
|
do_fscc=1
|
|
do_no_pc_mode=1
|
|
|
|
fp_fscc:
|
|
printf PDECODE,"fscc "
|
|
move.l %d2,%d0
|
|
jsr fp_compute_cond
|
|
move.w %d0,%d1
|
|
swap %d1
|
|
|
|
| decode addressing mode
|
|
fp_decode_addr_mode
|
|
|
|
.long fp_data, fp_fdbcc
|
|
.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 | save register nr
|
|
jsr fp_get_data_reg
|
|
swap %d1
|
|
move.b %d1,%d0
|
|
swap %d1
|
|
jsr fp_put_data_reg
|
|
printf PDECODE,"\n"
|
|
jra fp_end
|
|
|
|
fp_indirect:
|
|
fp_mode_addr_indirect
|
|
jra fp_do_scc
|
|
|
|
fp_postinc:
|
|
fp_mode_addr_indirect_postinc
|
|
jra fp_do_scc
|
|
|
|
fp_predecr:
|
|
fp_mode_addr_indirect_predec
|
|
jra fp_do_scc
|
|
|
|
fp_disp16:
|
|
fp_mode_addr_indirect_disp16
|
|
jra fp_do_scc
|
|
|
|
fp_extmode0:
|
|
fp_mode_addr_indirect_extmode0
|
|
jra fp_do_scc
|
|
|
|
fp_extmode1:
|
|
bfextu %d2{#13,#3},%d0
|
|
jmp ([0f:w,%pc,%d0*4])
|
|
|
|
.align 4
|
|
0:
|
|
.long fp_absolute_short, fp_absolute_long
|
|
.long fp_ill, fp_ill | NOTE: jump here to ftrap.x
|
|
.long fp_ill, fp_ill
|
|
.long fp_ill, fp_ill
|
|
|
|
fp_absolute_short:
|
|
fp_mode_abs_short
|
|
jra fp_do_scc
|
|
|
|
fp_absolute_long:
|
|
fp_mode_abs_long
|
|
| jra fp_do_scc
|
|
|
|
fp_do_scc:
|
|
swap %d1
|
|
putuser.b %d1,(%a0),fp_err_ua1,%a0
|
|
printf PDECODE,"\n"
|
|
jra fp_end
|
|
|
|
|
|
#define tst_NAN btst #24,%d1
|
|
#define tst_Z btst #26,%d1
|
|
#define tst_N btst #27,%d1
|
|
|
|
fp_compute_cond:
|
|
move.l (FPD_FPSR,FPDATA),%d1
|
|
btst #4,%d0
|
|
jeq 1f
|
|
tst_NAN
|
|
jeq 1f
|
|
bset #15,%d1
|
|
bset #7,%d1
|
|
move.l %d1,(FPD_FPSR,FPDATA)
|
|
1: and.w #0xf,%d0
|
|
jmp ([0f:w,%pc,%d0.w*4])
|
|
|
|
.align 4
|
|
0:
|
|
.long fp_f , fp_eq , fp_ogt, fp_oge
|
|
.long fp_olt, fp_ole, fp_ogl, fp_or
|
|
.long fp_un , fp_ueq, fp_ugt, fp_uge
|
|
.long fp_ult, fp_ule, fp_ne , fp_t
|
|
|
|
fp_f:
|
|
moveq #0,%d0
|
|
rts
|
|
|
|
fp_eq:
|
|
moveq #0,%d0
|
|
tst_Z
|
|
jeq 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_ogt:
|
|
moveq #0,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
tst_N
|
|
jne 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_oge:
|
|
moveq #-1,%d0
|
|
tst_Z
|
|
jne 2f
|
|
tst_NAN
|
|
jne 1f
|
|
tst_N
|
|
jeq 2f
|
|
1: moveq #0,%d0
|
|
2: rts
|
|
|
|
fp_olt:
|
|
moveq #0,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
tst_N
|
|
jeq 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_ole:
|
|
moveq #-1,%d0
|
|
tst_Z
|
|
jne 2f
|
|
tst_NAN
|
|
jne 1f
|
|
tst_N
|
|
jne 2f
|
|
1: moveq #0,%d0
|
|
2: rts
|
|
|
|
fp_ogl:
|
|
moveq #0,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_or:
|
|
moveq #0,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_un:
|
|
moveq #0,%d0
|
|
tst_NAN
|
|
jeq 1f
|
|
moveq #-1,%d0
|
|
rts
|
|
|
|
fp_ueq:
|
|
moveq #-1,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
moveq #0,%d0
|
|
1: rts
|
|
|
|
fp_ugt:
|
|
moveq #-1,%d0
|
|
tst_NAN
|
|
jne 2f
|
|
tst_N
|
|
jne 1f
|
|
tst_Z
|
|
jeq 2f
|
|
1: moveq #0,%d0
|
|
2: rts
|
|
|
|
fp_uge:
|
|
moveq #-1,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
tst_N
|
|
jeq 1f
|
|
moveq #0,%d0
|
|
1: rts
|
|
|
|
fp_ult:
|
|
moveq #-1,%d0
|
|
tst_NAN
|
|
jne 2f
|
|
tst_Z
|
|
jne 1f
|
|
tst_N
|
|
jne 2f
|
|
1: moveq #0,%d0
|
|
2: rts
|
|
|
|
fp_ule:
|
|
moveq #-1,%d0
|
|
tst_NAN
|
|
jne 1f
|
|
tst_Z
|
|
jne 1f
|
|
tst_N
|
|
jne 1f
|
|
moveq #0,%d0
|
|
1: rts
|
|
|
|
fp_ne:
|
|
moveq #0,%d0
|
|
tst_Z
|
|
jne 1f
|
|
moveq #-1,%d0
|
|
1: rts
|
|
|
|
fp_t:
|
|
moveq #-1,%d0
|
|
rts
|