]>
git.proxmox.com Git - qemu.git/blob - op-i386.c
2 * i386 micro operations
4 * Copyright (c) 2003 Fabrice Bellard
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "exec-i386.h"
22 /* NOTE: data are not static to force relocation generation by GCC */
24 uint8_t parity_table
[256] = {
25 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
26 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
27 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
28 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
29 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
30 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
31 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
32 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
33 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
34 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
35 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
36 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
37 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
38 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
39 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
40 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
41 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
42 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
43 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
44 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
45 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
46 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
47 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
48 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
49 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
50 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
51 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
52 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
53 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
54 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
55 CC_P
, 0, 0, CC_P
, 0, CC_P
, CC_P
, 0,
56 0, CC_P
, CC_P
, 0, CC_P
, 0, 0, CC_P
,
60 const uint8_t rclw_table
[32] = {
61 0, 1, 2, 3, 4, 5, 6, 7,
62 8, 9,10,11,12,13,14,15,
63 16, 0, 1, 2, 3, 4, 5, 6,
64 7, 8, 9,10,11,12,13,14,
68 const uint8_t rclb_table
[32] = {
69 0, 1, 2, 3, 4, 5, 6, 7,
70 8, 0, 1, 2, 3, 4, 5, 6,
71 7, 8, 0, 1, 2, 3, 4, 5,
72 6, 7, 8, 0, 1, 2, 3, 4,
76 /* an array of Intel 80-bit FP constants, to be loaded via integer ops */
77 typedef unsigned short f15ld
[5];
80 /*0*/ {0x0000,0x0000,0x0000,0x0000,0x0000},
81 /*1*/ {0x0000,0x0000,0x0000,0x8000,0x3fff},
82 /*pi*/ {0xc235,0x2168,0xdaa2,0xc90f,0x4000},
83 /*lg2*/ {0xf799,0xfbcf,0x9a84,0x9a20,0x3ffd},
84 /*ln2*/ {0x79ac,0xd1cf,0x17f7,0xb172,0x3ffe},
85 /*l2e*/ {0xf0bc,0x5c17,0x3b29,0xb8aa,0x3fff},
86 /*l2t*/ {0x8afe,0xcd1b,0x784b,0xd49a,0x4000}
89 /* the same, 64-bit version */
90 typedef unsigned short f15ld
[4];
93 #ifndef WORDS_BIGENDIAN
94 /*0*/ {0x0000,0x0000,0x0000,0x0000},
95 /*1*/ {0x0000,0x0000,0x0000,0x3ff0},
96 /*pi*/ {0x2d18,0x5444,0x21fb,0x4009},
97 /*lg2*/ {0x79ff,0x509f,0x4413,0x3fd3},
98 /*ln2*/ {0x39ef,0xfefa,0x2e42,0x3fe6},
99 /*l2e*/ {0x82fe,0x652b,0x1547,0x3ff7},
100 /*l2t*/ {0xa371,0x0979,0x934f,0x400a}
102 /*0*/ {0x0000,0x0000,0x0000,0x0000},
103 /*1*/ {0x3ff0,0x0000,0x0000,0x0000},
104 /*pi*/ {0x4009,0x21fb,0x5444,0x2d18},
105 /*lg2*/ {0x3fd3,0x4413,0x509f,0x79ff},
106 /*ln2*/ {0x3fe6,0x2e42,0xfefa,0x39ef},
107 /*l2e*/ {0x3ff7,0x1547,0x652b,0x82fe},
108 /*l2t*/ {0x400a,0x934f,0x0979,0xa371}
113 /* n must be a constant to be efficient */
114 static inline int lshift(int x
, int n
)
122 /* exception support */
123 /* NOTE: not static to force relocation generation by GCC */
124 void raise_exception(int exception_index
)
126 env
->exception_index
= exception_index
;
127 longjmp(env
->jmp_env
, 1);
130 /* we define the various pieces of code used by the JIT */
134 #include "opreg_template.h"
140 #include "opreg_template.h"
146 #include "opreg_template.h"
152 #include "opreg_template.h"
158 #include "opreg_template.h"
164 #include "opreg_template.h"
170 #include "opreg_template.h"
176 #include "opreg_template.h"
180 /* operations with flags */
182 void OPPROTO
op_addl_T0_T1_cc(void)
189 void OPPROTO
op_orl_T0_T1_cc(void)
195 void OPPROTO
op_andl_T0_T1_cc(void)
201 void OPPROTO
op_subl_T0_T1_cc(void)
208 void OPPROTO
op_xorl_T0_T1_cc(void)
214 void OPPROTO
op_cmpl_T0_T1_cc(void)
220 void OPPROTO
op_negl_T0_cc(void)
227 void OPPROTO
op_incl_T0_cc(void)
229 CC_SRC
= cc_table
[CC_OP
].compute_c();
234 void OPPROTO
op_decl_T0_cc(void)
236 CC_SRC
= cc_table
[CC_OP
].compute_c();
241 void OPPROTO
op_testl_T0_T1_cc(void)
246 /* operations without flags */
248 void OPPROTO
op_addl_T0_T1(void)
253 void OPPROTO
op_orl_T0_T1(void)
258 void OPPROTO
op_andl_T0_T1(void)
263 void OPPROTO
op_subl_T0_T1(void)
268 void OPPROTO
op_xorl_T0_T1(void)
273 void OPPROTO
op_negl_T0(void)
278 void OPPROTO
op_incl_T0(void)
283 void OPPROTO
op_decl_T0(void)
288 void OPPROTO
op_notl_T0(void)
293 void OPPROTO
op_bswapl_T0(void)
298 /* multiply/divide */
299 void OPPROTO
op_mulb_AL_T0(void)
302 res
= (uint8_t)EAX
* (uint8_t)T0
;
303 EAX
= (EAX
& 0xffff0000) | res
;
304 CC_SRC
= (res
& 0xff00);
307 void OPPROTO
op_imulb_AL_T0(void)
310 res
= (int8_t)EAX
* (int8_t)T0
;
311 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
312 CC_SRC
= (res
!= (int8_t)res
);
315 void OPPROTO
op_mulw_AX_T0(void)
318 res
= (uint16_t)EAX
* (uint16_t)T0
;
319 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
320 EDX
= (EDX
& 0xffff0000) | ((res
>> 16) & 0xffff);
324 void OPPROTO
op_imulw_AX_T0(void)
327 res
= (int16_t)EAX
* (int16_t)T0
;
328 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
329 EDX
= (EDX
& 0xffff0000) | ((res
>> 16) & 0xffff);
330 CC_SRC
= (res
!= (int16_t)res
);
333 void OPPROTO
op_mull_EAX_T0(void)
336 res
= (uint64_t)((uint32_t)EAX
) * (uint64_t)((uint32_t)T0
);
342 void OPPROTO
op_imull_EAX_T0(void)
345 res
= (int64_t)((int32_t)EAX
) * (int64_t)((int32_t)T0
);
348 CC_SRC
= (res
!= (int32_t)res
);
351 void OPPROTO
op_imulw_T0_T1(void)
354 res
= (int16_t)T0
* (int16_t)T1
;
356 CC_SRC
= (res
!= (int16_t)res
);
359 void OPPROTO
op_imull_T0_T1(void)
362 res
= (int64_t)((int32_t)T0
) * (int64_t)((int32_t)T1
);
364 CC_SRC
= (res
!= (int32_t)res
);
367 /* division, flags are undefined */
368 /* XXX: add exceptions for overflow & div by zero */
369 void OPPROTO
op_divb_AL_T0(void)
371 unsigned int num
, den
, q
, r
;
373 num
= (EAX
& 0xffff);
375 q
= (num
/ den
) & 0xff;
376 r
= (num
% den
) & 0xff;
377 EAX
= (EAX
& 0xffff0000) | (r
<< 8) | q
;
380 void OPPROTO
op_idivb_AL_T0(void)
386 q
= (num
/ den
) & 0xff;
387 r
= (num
% den
) & 0xff;
388 EAX
= (EAX
& 0xffff0000) | (r
<< 8) | q
;
391 void OPPROTO
op_divw_AX_T0(void)
393 unsigned int num
, den
, q
, r
;
395 num
= (EAX
& 0xffff) | ((EDX
& 0xffff) << 16);
397 q
= (num
/ den
) & 0xffff;
398 r
= (num
% den
) & 0xffff;
399 EAX
= (EAX
& 0xffff0000) | q
;
400 EDX
= (EDX
& 0xffff0000) | r
;
403 void OPPROTO
op_idivw_AX_T0(void)
407 num
= (EAX
& 0xffff) | ((EDX
& 0xffff) << 16);
409 q
= (num
/ den
) & 0xffff;
410 r
= (num
% den
) & 0xffff;
411 EAX
= (EAX
& 0xffff0000) | q
;
412 EDX
= (EDX
& 0xffff0000) | r
;
415 void OPPROTO
op_divl_EAX_T0(void)
417 unsigned int den
, q
, r
;
420 num
= EAX
| ((uint64_t)EDX
<< 32);
428 void OPPROTO
op_idivl_EAX_T0(void)
433 num
= EAX
| ((uint64_t)EDX
<< 32);
443 void OPPROTO
op_movl_T0_im(void)
448 void OPPROTO
op_movl_T1_im(void)
453 void OPPROTO
op_movl_A0_im(void)
458 void OPPROTO
op_addl_A0_im(void)
463 void OPPROTO
op_andl_A0_ffff(void)
470 void OPPROTO
op_ldub_T0_A0(void)
472 T0
= ldub((uint8_t *)A0
);
475 void OPPROTO
op_ldsb_T0_A0(void)
477 T0
= ldsb((int8_t *)A0
);
480 void OPPROTO
op_lduw_T0_A0(void)
482 T0
= lduw((uint8_t *)A0
);
485 void OPPROTO
op_ldsw_T0_A0(void)
487 T0
= ldsw((int8_t *)A0
);
490 void OPPROTO
op_ldl_T0_A0(void)
492 T0
= ldl((uint8_t *)A0
);
495 void OPPROTO
op_ldub_T1_A0(void)
497 T1
= ldub((uint8_t *)A0
);
500 void OPPROTO
op_ldsb_T1_A0(void)
502 T1
= ldsb((int8_t *)A0
);
505 void OPPROTO
op_lduw_T1_A0(void)
507 T1
= lduw((uint8_t *)A0
);
510 void OPPROTO
op_ldsw_T1_A0(void)
512 T1
= ldsw((int8_t *)A0
);
515 void OPPROTO
op_ldl_T1_A0(void)
517 T1
= ldl((uint8_t *)A0
);
520 void OPPROTO
op_stb_T0_A0(void)
522 stb((uint8_t *)A0
, T0
);
525 void OPPROTO
op_stw_T0_A0(void)
527 stw((uint8_t *)A0
, T0
);
530 void OPPROTO
op_stl_T0_A0(void)
532 stl((uint8_t *)A0
, T0
);
535 /* used for bit operations */
537 void OPPROTO
op_add_bitw_A0_T1(void)
539 A0
+= ((int32_t)T1
>> 4) << 1;
542 void OPPROTO
op_add_bitl_A0_T1(void)
544 A0
+= ((int32_t)T1
>> 5) << 2;
549 void OPPROTO
op_jmp_T0(void)
554 void OPPROTO
op_jmp_im(void)
559 void OPPROTO
op_int_im(void)
562 raise_exception(EXCP0D_GPF
);
565 void OPPROTO
op_int3(void)
568 raise_exception(EXCP03_INT3
);
571 void OPPROTO
op_into(void)
574 eflags
= cc_table
[CC_OP
].compute_all();
577 raise_exception(EXCP04_INTO
);
588 #include "ops_template.h"
592 #include "ops_template.h"
596 #include "ops_template.h"
601 void OPPROTO
op_movsbl_T0_T0(void)
606 void OPPROTO
op_movzbl_T0_T0(void)
611 void OPPROTO
op_movswl_T0_T0(void)
616 void OPPROTO
op_movzwl_T0_T0(void)
621 void OPPROTO
op_movswl_EAX_AX(void)
626 void OPPROTO
op_movsbw_AX_AL(void)
628 EAX
= (EAX
& 0xffff0000) | ((int8_t)EAX
& 0xffff);
631 void OPPROTO
op_movslq_EDX_EAX(void)
633 EDX
= (int32_t)EAX
>> 31;
636 void OPPROTO
op_movswl_DX_AX(void)
638 EDX
= (EDX
& 0xffff0000) | (((int16_t)EAX
>> 15) & 0xffff);
642 /* XXX: add 16 bit operand/16 bit seg variants */
644 void op_pushl_T0(void)
648 stl((void *)offset
, T0
);
649 /* modify ESP after to handle exceptions correctly */
653 void op_pushl_T1(void)
657 stl((void *)offset
, T1
);
658 /* modify ESP after to handle exceptions correctly */
662 void op_popl_T0(void)
664 T0
= ldl((void *)ESP
);
668 void op_addl_ESP_im(void)
676 sp
= (void *)(ESP
- 32);
685 ESP
= (unsigned long)sp
;
691 sp
= (void *)(ESP
- 16);
700 ESP
= (unsigned long)sp
;
714 ESP
= (unsigned long)sp
+ 32;
728 ESP
= (unsigned long)sp
+ 16;
733 unsigned int bp
, frame_temp
, level
;
740 frame_temp
= (unsigned int)sp
;
764 asm("rdtsc" : "=A" (val
));
766 /* better than nothing: the time increases */
776 void OPPROTO
op_aam(void)
783 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
787 void OPPROTO
op_aad(void)
792 ah
= (EAX
>> 8) & 0xff;
793 al
= ((ah
* base
) + al
) & 0xff;
794 EAX
= (EAX
& ~0xffff) | al
;
798 void OPPROTO
op_aaa(void)
804 eflags
= cc_table
[CC_OP
].compute_all();
807 ah
= (EAX
>> 8) & 0xff;
809 icarry
= (al
> 0xf9);
810 if (((al
& 0x0f) > 9 ) || af
) {
811 al
= (al
+ 6) & 0x0f;
812 ah
= (ah
+ 1 + icarry
) & 0xff;
813 eflags
|= CC_C
| CC_A
;
815 eflags
&= ~(CC_C
| CC_A
);
818 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
822 void OPPROTO
op_aas(void)
828 eflags
= cc_table
[CC_OP
].compute_all();
831 ah
= (EAX
>> 8) & 0xff;
834 if (((al
& 0x0f) > 9 ) || af
) {
835 al
= (al
- 6) & 0x0f;
836 ah
= (ah
- 1 - icarry
) & 0xff;
837 eflags
|= CC_C
| CC_A
;
839 eflags
&= ~(CC_C
| CC_A
);
842 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
846 void OPPROTO
op_daa(void)
851 eflags
= cc_table
[CC_OP
].compute_all();
857 if (((al
& 0x0f) > 9 ) || af
) {
858 al
= (al
+ 6) & 0xff;
861 if ((al
> 0x9f) || cf
) {
862 al
= (al
+ 0x60) & 0xff;
865 EAX
= (EAX
& ~0xff) | al
;
866 /* well, speed is not an issue here, so we compute the flags by hand */
867 eflags
|= (al
== 0) << 6; /* zf */
868 eflags
|= parity_table
[al
]; /* pf */
869 eflags
|= (al
& 0x80); /* sf */
873 void OPPROTO
op_das(void)
878 eflags
= cc_table
[CC_OP
].compute_all();
885 if (((al
& 0x0f) > 9 ) || af
) {
889 al
= (al
- 6) & 0xff;
891 if ((al1
> 0x99) || cf
) {
892 al
= (al
- 0x60) & 0xff;
895 EAX
= (EAX
& ~0xff) | al
;
896 /* well, speed is not an issue here, so we compute the flags by hand */
897 eflags
|= (al
== 0) << 6; /* zf */
898 eflags
|= parity_table
[al
]; /* pf */
899 eflags
|= (al
& 0x80); /* sf */
903 /* segment handling */
905 void load_seg(int seg_reg
, int selector
)
908 SegmentDescriptorTable
*dt
;
913 env
->segs
[seg_reg
] = selector
;
914 sc
= &env
->seg_cache
[seg_reg
];
916 sc
->base
= (void *)(selector
<< 4);
924 index
= selector
& ~7;
925 if ((index
+ 7) > dt
->limit
)
926 raise_exception(EXCP0D_GPF
);
927 ptr
= dt
->base
+ index
;
930 sc
->base
= (void *)((e1
>> 16) | ((e2
& 0xff) << 16) | (e2
& 0xff000000));
931 sc
->limit
= (e1
& 0xffff) | (e2
& 0x000f0000);
933 sc
->limit
= (sc
->limit
<< 12) | 0xfff;
934 sc
->seg_32bit
= (e2
>> 22) & 1;
936 fprintf(logfile
, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx seg_32bit=%d\n",
937 selector
, (unsigned long)sc
->base
, sc
->limit
, sc
->seg_32bit
);
942 void OPPROTO
op_movl_seg_T0(void)
944 load_seg(PARAM1
, T0
& 0xffff);
947 void OPPROTO
op_movl_T0_seg(void)
949 T0
= env
->segs
[PARAM1
];
952 void OPPROTO
op_addl_A0_seg(void)
954 A0
+= *(unsigned long *)((char *)env
+ PARAM1
);
959 /* slow jumps cases (compute x86 flags) */
960 void OPPROTO
op_jo_cc(void)
963 eflags
= cc_table
[CC_OP
].compute_all();
971 void OPPROTO
op_jb_cc(void)
973 if (cc_table
[CC_OP
].compute_c())
980 void OPPROTO
op_jz_cc(void)
983 eflags
= cc_table
[CC_OP
].compute_all();
991 void OPPROTO
op_jbe_cc(void)
994 eflags
= cc_table
[CC_OP
].compute_all();
995 if (eflags
& (CC_Z
| CC_C
))
1002 void OPPROTO
op_js_cc(void)
1005 eflags
= cc_table
[CC_OP
].compute_all();
1013 void OPPROTO
op_jp_cc(void)
1016 eflags
= cc_table
[CC_OP
].compute_all();
1024 void OPPROTO
op_jl_cc(void)
1027 eflags
= cc_table
[CC_OP
].compute_all();
1028 if ((eflags
^ (eflags
>> 4)) & 0x80)
1035 void OPPROTO
op_jle_cc(void)
1038 eflags
= cc_table
[CC_OP
].compute_all();
1039 if (((eflags
^ (eflags
>> 4)) & 0x80) || (eflags
& CC_Z
))
1046 /* slow set cases (compute x86 flags) */
1047 void OPPROTO
op_seto_T0_cc(void)
1050 eflags
= cc_table
[CC_OP
].compute_all();
1051 T0
= (eflags
>> 11) & 1;
1054 void OPPROTO
op_setb_T0_cc(void)
1056 T0
= cc_table
[CC_OP
].compute_c();
1059 void OPPROTO
op_setz_T0_cc(void)
1062 eflags
= cc_table
[CC_OP
].compute_all();
1063 T0
= (eflags
>> 6) & 1;
1066 void OPPROTO
op_setbe_T0_cc(void)
1069 eflags
= cc_table
[CC_OP
].compute_all();
1070 T0
= (eflags
& (CC_Z
| CC_C
)) != 0;
1073 void OPPROTO
op_sets_T0_cc(void)
1076 eflags
= cc_table
[CC_OP
].compute_all();
1077 T0
= (eflags
>> 7) & 1;
1080 void OPPROTO
op_setp_T0_cc(void)
1083 eflags
= cc_table
[CC_OP
].compute_all();
1084 T0
= (eflags
>> 2) & 1;
1087 void OPPROTO
op_setl_T0_cc(void)
1090 eflags
= cc_table
[CC_OP
].compute_all();
1091 T0
= ((eflags
^ (eflags
>> 4)) >> 7) & 1;
1094 void OPPROTO
op_setle_T0_cc(void)
1097 eflags
= cc_table
[CC_OP
].compute_all();
1098 T0
= (((eflags
^ (eflags
>> 4)) & 0x80) || (eflags
& CC_Z
)) != 0;
1101 void OPPROTO
op_xor_T0_1(void)
1106 void OPPROTO
op_set_cc_op(void)
1111 void OPPROTO
op_movl_eflags_T0(void)
1114 DF
= 1 - (2 * ((T0
>> 10) & 1));
1117 /* XXX: compute only O flag */
1118 void OPPROTO
op_movb_eflags_T0(void)
1121 of
= cc_table
[CC_OP
].compute_all() & CC_O
;
1125 void OPPROTO
op_movl_T0_eflags(void)
1127 T0
= cc_table
[CC_OP
].compute_all();
1128 T0
|= (DF
& DIRECTION_FLAG
);
1131 void OPPROTO
op_cld(void)
1136 void OPPROTO
op_std(void)
1141 void OPPROTO
op_clc(void)
1144 eflags
= cc_table
[CC_OP
].compute_all();
1149 void OPPROTO
op_stc(void)
1152 eflags
= cc_table
[CC_OP
].compute_all();
1157 void OPPROTO
op_cmc(void)
1160 eflags
= cc_table
[CC_OP
].compute_all();
1165 void OPPROTO
op_salc(void)
1168 cf
= cc_table
[CC_OP
].compute_c();
1169 EAX
= (EAX
& ~0xff) | ((-cf
) & 0xff);
1172 static int compute_all_eflags(void)
1177 static int compute_c_eflags(void)
1179 return CC_SRC
& CC_C
;
1182 static int compute_c_mul(void)
1189 static int compute_all_mul(void)
1191 int cf
, pf
, af
, zf
, sf
, of
;
1193 pf
= 0; /* undefined */
1194 af
= 0; /* undefined */
1195 zf
= 0; /* undefined */
1196 sf
= 0; /* undefined */
1198 return cf
| pf
| af
| zf
| sf
| of
;
1201 CCTable cc_table
[CC_OP_NB
] = {
1202 [CC_OP_DYNAMIC
] = { /* should never happen */ },
1204 [CC_OP_EFLAGS
] = { compute_all_eflags
, compute_c_eflags
},
1206 [CC_OP_MUL
] = { compute_all_mul
, compute_c_mul
},
1208 [CC_OP_ADDB
] = { compute_all_addb
, compute_c_addb
},
1209 [CC_OP_ADDW
] = { compute_all_addw
, compute_c_addw
},
1210 [CC_OP_ADDL
] = { compute_all_addl
, compute_c_addl
},
1212 [CC_OP_ADCB
] = { compute_all_adcb
, compute_c_adcb
},
1213 [CC_OP_ADCW
] = { compute_all_adcw
, compute_c_adcw
},
1214 [CC_OP_ADCL
] = { compute_all_adcl
, compute_c_adcl
},
1216 [CC_OP_SUBB
] = { compute_all_subb
, compute_c_subb
},
1217 [CC_OP_SUBW
] = { compute_all_subw
, compute_c_subw
},
1218 [CC_OP_SUBL
] = { compute_all_subl
, compute_c_subl
},
1220 [CC_OP_SBBB
] = { compute_all_sbbb
, compute_c_sbbb
},
1221 [CC_OP_SBBW
] = { compute_all_sbbw
, compute_c_sbbw
},
1222 [CC_OP_SBBL
] = { compute_all_sbbl
, compute_c_sbbl
},
1224 [CC_OP_LOGICB
] = { compute_all_logicb
, compute_c_logicb
},
1225 [CC_OP_LOGICW
] = { compute_all_logicw
, compute_c_logicw
},
1226 [CC_OP_LOGICL
] = { compute_all_logicl
, compute_c_logicl
},
1228 [CC_OP_INCB
] = { compute_all_incb
, compute_c_incl
},
1229 [CC_OP_INCW
] = { compute_all_incw
, compute_c_incl
},
1230 [CC_OP_INCL
] = { compute_all_incl
, compute_c_incl
},
1232 [CC_OP_DECB
] = { compute_all_decb
, compute_c_incl
},
1233 [CC_OP_DECW
] = { compute_all_decw
, compute_c_incl
},
1234 [CC_OP_DECL
] = { compute_all_decl
, compute_c_incl
},
1236 [CC_OP_SHLB
] = { compute_all_shlb
, compute_c_shll
},
1237 [CC_OP_SHLW
] = { compute_all_shlw
, compute_c_shll
},
1238 [CC_OP_SHLL
] = { compute_all_shll
, compute_c_shll
},
1240 [CC_OP_SARB
] = { compute_all_sarb
, compute_c_shll
},
1241 [CC_OP_SARW
] = { compute_all_sarw
, compute_c_shll
},
1242 [CC_OP_SARL
] = { compute_all_sarl
, compute_c_shll
},
1245 /* floating point support */
1247 #ifdef USE_X86LDOUBLE
1248 /* use long double functions */
1249 #define lrint lrintl
1250 #define llrint llrintl
1258 #define atan2 atan2l
1259 #define floor floorl
1264 extern int lrint(CPU86_LDouble x
);
1265 extern int64_t llrint(CPU86_LDouble x
);
1266 extern CPU86_LDouble
fabs(CPU86_LDouble x
);
1267 extern CPU86_LDouble
sin(CPU86_LDouble x
);
1268 extern CPU86_LDouble
cos(CPU86_LDouble x
);
1269 extern CPU86_LDouble
sqrt(CPU86_LDouble x
);
1270 extern CPU86_LDouble
pow(CPU86_LDouble
, CPU86_LDouble
);
1271 extern CPU86_LDouble
log(CPU86_LDouble x
);
1272 extern CPU86_LDouble
tan(CPU86_LDouble x
);
1273 extern CPU86_LDouble
atan2(CPU86_LDouble
, CPU86_LDouble
);
1274 extern CPU86_LDouble
floor(CPU86_LDouble x
);
1275 extern CPU86_LDouble
ceil(CPU86_LDouble x
);
1276 extern CPU86_LDouble
rint(CPU86_LDouble x
);
1278 #define RC_MASK 0xc00
1279 #define RC_NEAR 0x000
1280 #define RC_DOWN 0x400
1282 #define RC_CHOP 0xc00
1284 #define MAXTAN 9223372036854775808.0
1286 #ifdef USE_X86LDOUBLE
1292 unsigned long long lower
;
1293 unsigned short upper
;
1297 /* the following deal with x86 long double-precision numbers */
1298 #define MAXEXPD 0x7fff
1299 #define EXPBIAS 16383
1300 #define EXPD(fp) (fp.l.upper & 0x7fff)
1301 #define SIGND(fp) ((fp.l.upper) & 0x8000)
1302 #define MANTD(fp) (fp.l.lower)
1303 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
1309 #ifndef WORDS_BIGENDIAN
1311 unsigned long lower
;
1317 unsigned long lower
;
1323 /* the following deal with IEEE double-precision numbers */
1324 #define MAXEXPD 0x7ff
1325 #define EXPBIAS 1023
1326 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
1327 #define SIGND(fp) ((fp.l.upper) & 0x80000000)
1328 #define MANTD(fp) (fp.ll & ((1LL << 52) - 1))
1329 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
1334 void OPPROTO
op_flds_FT0_A0(void)
1336 FT0
= ldfl((void *)A0
);
1339 void OPPROTO
op_fldl_FT0_A0(void)
1341 FT0
= ldfq((void *)A0
);
1344 void OPPROTO
op_fild_FT0_A0(void)
1346 FT0
= (CPU86_LDouble
)ldsw((void *)A0
);
1349 void OPPROTO
op_fildl_FT0_A0(void)
1351 FT0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1354 void OPPROTO
op_fildll_FT0_A0(void)
1356 FT0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1361 void OPPROTO
op_flds_ST0_A0(void)
1363 ST0
= ldfl((void *)A0
);
1366 void OPPROTO
op_fldl_ST0_A0(void)
1368 ST0
= ldfq((void *)A0
);
1371 #ifdef USE_X86LDOUBLE
1372 void OPPROTO
op_fldt_ST0_A0(void)
1374 ST0
= *(long double *)A0
;
1377 void helper_fldt_ST0_A0(void)
1379 CPU86_LDoubleU temp
;
1382 upper
= lduw((uint8_t *)A0
+ 8);
1383 /* XXX: handle overflow ? */
1384 e
= (upper
& 0x7fff) - 16383 + EXPBIAS
; /* exponent */
1385 e
|= (upper
>> 4) & 0x800; /* sign */
1386 temp
.ll
= ((ldq((void *)A0
) >> 11) & ((1LL << 52) - 1)) | ((uint64_t)e
<< 52);
1390 void OPPROTO
op_fldt_ST0_A0(void)
1392 helper_fldt_ST0_A0();
1396 void OPPROTO
op_fild_ST0_A0(void)
1398 ST0
= (CPU86_LDouble
)ldsw((void *)A0
);
1401 void OPPROTO
op_fildl_ST0_A0(void)
1403 ST0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1406 void OPPROTO
op_fildll_ST0_A0(void)
1408 ST0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1413 void OPPROTO
op_fsts_ST0_A0(void)
1415 stfl((void *)A0
, (float)ST0
);
1418 void OPPROTO
op_fstl_ST0_A0(void)
1420 stfq((void *)A0
, (double)ST0
);
1423 #ifdef USE_X86LDOUBLE
1424 void OPPROTO
op_fstt_ST0_A0(void)
1426 *(long double *)A0
= ST0
;
1429 void helper_fstt_ST0_A0(void)
1431 CPU86_LDoubleU temp
;
1435 stq((void *)A0
, (MANTD(temp
) << 11) | (1LL << 63));
1436 /* exponent + sign */
1437 e
= EXPD(temp
) - EXPBIAS
+ 16383;
1438 e
|= SIGND(temp
) >> 16;
1439 stw((uint8_t *)A0
+ 8, e
);
1442 void OPPROTO
op_fstt_ST0_A0(void)
1444 helper_fstt_ST0_A0();
1448 void OPPROTO
op_fist_ST0_A0(void)
1452 stw((void *)A0
, val
);
1455 void OPPROTO
op_fistl_ST0_A0(void)
1459 stl((void *)A0
, val
);
1462 void OPPROTO
op_fistll_ST0_A0(void)
1466 stq((void *)A0
, val
);
1471 #define MUL10(iv) ( iv + iv + (iv << 3) )
1473 void helper_fbld_ST0_A0(void)
1476 CPU86_LDouble fpsrcop
;
1480 /* in this code, seg/m32i will be used as temporary ptr/int */
1481 seg
= (uint8_t *)A0
+ 8;
1483 /* XXX: raise exception */
1487 /* XXX: raise exception */
1488 if ((v
& 0xf0) != 0)
1490 m32i
= v
; /* <-- d14 */
1492 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d13 */
1493 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d12 */
1495 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d11 */
1496 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d10 */
1498 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d9 */
1499 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d8 */
1500 fpsrcop
= ((CPU86_LDouble
)m32i
) * 100000000.0;
1503 m32i
= (v
>> 4); /* <-- d7 */
1504 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d6 */
1506 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d5 */
1507 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d4 */
1509 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d3 */
1510 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d2 */
1512 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d1 */
1513 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d0 */
1514 fpsrcop
+= ((CPU86_LDouble
)m32i
);
1515 if ( ldub(seg
+9) & 0x80 )
1520 void OPPROTO
op_fbld_ST0_A0(void)
1522 helper_fbld_ST0_A0();
1525 void helper_fbst_ST0_A0(void)
1527 CPU86_LDouble fptemp
;
1528 CPU86_LDouble fpsrcop
;
1530 uint8_t *mem_ref
, *mem_end
;
1532 fpsrcop
= rint(ST0
);
1533 mem_ref
= (uint8_t *)A0
;
1534 mem_end
= mem_ref
+ 8;
1535 if ( fpsrcop
< 0.0 ) {
1536 stw(mem_end
, 0x8000);
1539 stw(mem_end
, 0x0000);
1541 while (mem_ref
< mem_end
) {
1544 fptemp
= floor(fpsrcop
/10.0);
1545 v
= ((int)(fpsrcop
- fptemp
*10.0));
1546 if (fptemp
== 0.0) {
1551 fptemp
= floor(fpsrcop
/10.0);
1552 v
|= (((int)(fpsrcop
- fptemp
*10.0)) << 4);
1556 while (mem_ref
< mem_end
) {
1561 void OPPROTO
op_fbst_ST0_A0(void)
1563 helper_fbst_ST0_A0();
1568 static inline void fpush(void)
1570 env
->fpstt
= (env
->fpstt
- 1) & 7;
1571 env
->fptags
[env
->fpstt
] = 0; /* validate stack entry */
1574 static inline void fpop(void)
1576 env
->fptags
[env
->fpstt
] = 1; /* invvalidate stack entry */
1577 env
->fpstt
= (env
->fpstt
+ 1) & 7;
1580 void OPPROTO
op_fpush(void)
1585 void OPPROTO
op_fpop(void)
1590 void OPPROTO
op_fdecstp(void)
1592 env
->fpstt
= (env
->fpstt
- 1) & 7;
1593 env
->fpus
&= (~0x4700);
1596 void OPPROTO
op_fincstp(void)
1598 env
->fpstt
= (env
->fpstt
+ 1) & 7;
1599 env
->fpus
&= (~0x4700);
1602 void OPPROTO
op_fmov_ST0_FT0(void)
1607 void OPPROTO
op_fmov_FT0_STN(void)
1612 void OPPROTO
op_fmov_ST0_STN(void)
1617 void OPPROTO
op_fmov_STN_ST0(void)
1622 void OPPROTO
op_fxchg_ST0_STN(void)
1630 /* FPU operations */
1632 /* XXX: handle nans */
1633 void OPPROTO
op_fcom_ST0_FT0(void)
1635 env
->fpus
&= (~0x4500); /* (C3,C2,C0) <-- 000 */
1637 env
->fpus
|= 0x100; /* (C3,C2,C0) <-- 001 */
1638 else if (ST0
== FT0
)
1639 env
->fpus
|= 0x4000; /* (C3,C2,C0) <-- 100 */
1643 /* XXX: handle nans */
1644 void OPPROTO
op_fucom_ST0_FT0(void)
1646 env
->fpus
&= (~0x4500); /* (C3,C2,C0) <-- 000 */
1648 env
->fpus
|= 0x100; /* (C3,C2,C0) <-- 001 */
1649 else if (ST0
== FT0
)
1650 env
->fpus
|= 0x4000; /* (C3,C2,C0) <-- 100 */
1654 void OPPROTO
op_fadd_ST0_FT0(void)
1659 void OPPROTO
op_fmul_ST0_FT0(void)
1664 void OPPROTO
op_fsub_ST0_FT0(void)
1669 void OPPROTO
op_fsubr_ST0_FT0(void)
1674 void OPPROTO
op_fdiv_ST0_FT0(void)
1679 void OPPROTO
op_fdivr_ST0_FT0(void)
1684 /* fp operations between STN and ST0 */
1686 void OPPROTO
op_fadd_STN_ST0(void)
1691 void OPPROTO
op_fmul_STN_ST0(void)
1696 void OPPROTO
op_fsub_STN_ST0(void)
1701 void OPPROTO
op_fsubr_STN_ST0(void)
1708 void OPPROTO
op_fdiv_STN_ST0(void)
1713 void OPPROTO
op_fdivr_STN_ST0(void)
1720 /* misc FPU operations */
1721 void OPPROTO
op_fchs_ST0(void)
1726 void OPPROTO
op_fabs_ST0(void)
1731 void helper_fxam_ST0(void)
1733 CPU86_LDoubleU temp
;
1738 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1740 env
->fpus
|= 0x200; /* C1 <-- 1 */
1742 expdif
= EXPD(temp
);
1743 if (expdif
== MAXEXPD
) {
1744 if (MANTD(temp
) == 0)
1745 env
->fpus
|= 0x500 /*Infinity*/;
1747 env
->fpus
|= 0x100 /*NaN*/;
1748 } else if (expdif
== 0) {
1749 if (MANTD(temp
) == 0)
1750 env
->fpus
|= 0x4000 /*Zero*/;
1752 env
->fpus
|= 0x4400 /*Denormal*/;
1758 void OPPROTO
op_fxam_ST0(void)
1763 void OPPROTO
op_fld1_ST0(void)
1765 ST0
= *(CPU86_LDouble
*)&f15rk
[1];
1768 void OPPROTO
op_fldl2t_ST0(void)
1770 ST0
= *(CPU86_LDouble
*)&f15rk
[6];
1773 void OPPROTO
op_fldl2e_ST0(void)
1775 ST0
= *(CPU86_LDouble
*)&f15rk
[5];
1778 void OPPROTO
op_fldpi_ST0(void)
1780 ST0
= *(CPU86_LDouble
*)&f15rk
[2];
1783 void OPPROTO
op_fldlg2_ST0(void)
1785 ST0
= *(CPU86_LDouble
*)&f15rk
[3];
1788 void OPPROTO
op_fldln2_ST0(void)
1790 ST0
= *(CPU86_LDouble
*)&f15rk
[4];
1793 void OPPROTO
op_fldz_ST0(void)
1795 ST0
= *(CPU86_LDouble
*)&f15rk
[0];
1798 void OPPROTO
op_fldz_FT0(void)
1800 ST0
= *(CPU86_LDouble
*)&f15rk
[0];
1803 void helper_f2xm1(void)
1805 ST0
= pow(2.0,ST0
) - 1.0;
1808 void helper_fyl2x(void)
1810 CPU86_LDouble fptemp
;
1814 fptemp
= log(fptemp
)/log(2.0); /* log2(ST) */
1818 env
->fpus
&= (~0x4700);
1823 void helper_fptan(void)
1825 CPU86_LDouble fptemp
;
1828 if((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
1834 env
->fpus
&= (~0x400); /* C2 <-- 0 */
1835 /* the above code is for |arg| < 2**52 only */
1839 void helper_fpatan(void)
1841 CPU86_LDouble fptemp
, fpsrcop
;
1845 ST1
= atan2(fpsrcop
,fptemp
);
1849 void helper_fxtract(void)
1851 CPU86_LDoubleU temp
;
1852 unsigned int expdif
;
1855 expdif
= EXPD(temp
) - EXPBIAS
;
1856 /*DP exponent bias*/
1863 void helper_fprem1(void)
1865 CPU86_LDouble dblq
, fpsrcop
, fptemp
;
1866 CPU86_LDoubleU fpsrcop1
, fptemp1
;
1872 fpsrcop1
.d
= fpsrcop
;
1874 expdif
= EXPD(fpsrcop1
) - EXPD(fptemp1
);
1876 dblq
= fpsrcop
/ fptemp
;
1877 dblq
= (dblq
< 0.0)? ceil(dblq
): floor(dblq
);
1878 ST0
= fpsrcop
- fptemp
*dblq
;
1879 q
= (int)dblq
; /* cutting off top bits is assumed here */
1880 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1881 /* (C0,C1,C3) <-- (q2,q1,q0) */
1882 env
->fpus
|= (q
&0x4) << 6; /* (C0) <-- q2 */
1883 env
->fpus
|= (q
&0x2) << 8; /* (C1) <-- q1 */
1884 env
->fpus
|= (q
&0x1) << 14; /* (C3) <-- q0 */
1886 env
->fpus
|= 0x400; /* C2 <-- 1 */
1887 fptemp
= pow(2.0, expdif
-50);
1888 fpsrcop
= (ST0
/ ST1
) / fptemp
;
1889 /* fpsrcop = integer obtained by rounding to the nearest */
1890 fpsrcop
= (fpsrcop
-floor(fpsrcop
) < ceil(fpsrcop
)-fpsrcop
)?
1891 floor(fpsrcop
): ceil(fpsrcop
);
1892 ST0
-= (ST1
* fpsrcop
* fptemp
);
1896 void helper_fprem(void)
1898 CPU86_LDouble dblq
, fpsrcop
, fptemp
;
1899 CPU86_LDoubleU fpsrcop1
, fptemp1
;
1905 fpsrcop1
.d
= fpsrcop
;
1907 expdif
= EXPD(fpsrcop1
) - EXPD(fptemp1
);
1908 if ( expdif
< 53 ) {
1909 dblq
= fpsrcop
/ fptemp
;
1910 dblq
= (dblq
< 0.0)? ceil(dblq
): floor(dblq
);
1911 ST0
= fpsrcop
- fptemp
*dblq
;
1912 q
= (int)dblq
; /* cutting off top bits is assumed here */
1913 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1914 /* (C0,C1,C3) <-- (q2,q1,q0) */
1915 env
->fpus
|= (q
&0x4) << 6; /* (C0) <-- q2 */
1916 env
->fpus
|= (q
&0x2) << 8; /* (C1) <-- q1 */
1917 env
->fpus
|= (q
&0x1) << 14; /* (C3) <-- q0 */
1919 env
->fpus
|= 0x400; /* C2 <-- 1 */
1920 fptemp
= pow(2.0, expdif
-50);
1921 fpsrcop
= (ST0
/ ST1
) / fptemp
;
1922 /* fpsrcop = integer obtained by chopping */
1923 fpsrcop
= (fpsrcop
< 0.0)?
1924 -(floor(fabs(fpsrcop
))): floor(fpsrcop
);
1925 ST0
-= (ST1
* fpsrcop
* fptemp
);
1929 void helper_fyl2xp1(void)
1931 CPU86_LDouble fptemp
;
1934 if ((fptemp
+1.0)>0.0) {
1935 fptemp
= log(fptemp
+1.0) / log(2.0); /* log2(ST+1.0) */
1939 env
->fpus
&= (~0x4700);
1944 void helper_fsqrt(void)
1946 CPU86_LDouble fptemp
;
1950 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1956 void helper_fsincos(void)
1958 CPU86_LDouble fptemp
;
1961 if ((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
1967 env
->fpus
&= (~0x400); /* C2 <-- 0 */
1968 /* the above code is for |arg| < 2**63 only */
1972 void helper_frndint(void)
1977 void helper_fscale(void)
1979 CPU86_LDouble fpsrcop
, fptemp
;
1982 fptemp
= pow(fpsrcop
,ST1
);
1986 void helper_fsin(void)
1988 CPU86_LDouble fptemp
;
1991 if ((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
1995 env
->fpus
&= (~0x400); /* C2 <-- 0 */
1996 /* the above code is for |arg| < 2**53 only */
2000 void helper_fcos(void)
2002 CPU86_LDouble fptemp
;
2005 if((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
2009 env
->fpus
&= (~0x400); /* C2 <-- 0 */
2010 /* the above code is for |arg5 < 2**63 only */
2014 /* associated heplers to reduce generated code length and to simplify
2015 relocation (FP constants are usually stored in .rodata section) */
2017 void OPPROTO
op_f2xm1(void)
2022 void OPPROTO
op_fyl2x(void)
2027 void OPPROTO
op_fptan(void)
2032 void OPPROTO
op_fpatan(void)
2037 void OPPROTO
op_fxtract(void)
2042 void OPPROTO
op_fprem1(void)
2048 void OPPROTO
op_fprem(void)
2053 void OPPROTO
op_fyl2xp1(void)
2058 void OPPROTO
op_fsqrt(void)
2063 void OPPROTO
op_fsincos(void)
2068 void OPPROTO
op_frndint(void)
2073 void OPPROTO
op_fscale(void)
2078 void OPPROTO
op_fsin(void)
2083 void OPPROTO
op_fcos(void)
2088 void OPPROTO
op_fnstsw_A0(void)
2091 fpus
= (env
->fpus
& ~0x3800) | (env
->fpstt
& 0x7) << 11;
2092 stw((void *)A0
, fpus
);
2095 void OPPROTO
op_fnstsw_EAX(void)
2098 fpus
= (env
->fpus
& ~0x3800) | (env
->fpstt
& 0x7) << 11;
2099 EAX
= (EAX
& 0xffff0000) | fpus
;
2102 void OPPROTO
op_fnstcw_A0(void)
2104 stw((void *)A0
, env
->fpuc
);
2107 void OPPROTO
op_fldcw_A0(void)
2110 env
->fpuc
= lduw((void *)A0
);
2111 /* set rounding mode */
2112 switch(env
->fpuc
& RC_MASK
) {
2115 rnd_type
= FE_TONEAREST
;
2118 rnd_type
= FE_DOWNWARD
;
2121 rnd_type
= FE_UPWARD
;
2124 rnd_type
= FE_TOWARDZERO
;
2127 fesetround(rnd_type
);
2130 void OPPROTO
op_fclex(void)
2132 env
->fpus
&= 0x7f00;
2135 void OPPROTO
op_fninit(void)