]>
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 /* we define the various pieces of code used by the JIT */
126 #include "opreg_template.h"
132 #include "opreg_template.h"
138 #include "opreg_template.h"
144 #include "opreg_template.h"
150 #include "opreg_template.h"
156 #include "opreg_template.h"
162 #include "opreg_template.h"
168 #include "opreg_template.h"
172 /* operations with flags */
174 void OPPROTO
op_addl_T0_T1_cc(void)
181 void OPPROTO
op_orl_T0_T1_cc(void)
187 void OPPROTO
op_andl_T0_T1_cc(void)
193 void OPPROTO
op_subl_T0_T1_cc(void)
200 void OPPROTO
op_xorl_T0_T1_cc(void)
206 void OPPROTO
op_cmpl_T0_T1_cc(void)
212 void OPPROTO
op_negl_T0_cc(void)
219 void OPPROTO
op_incl_T0_cc(void)
221 CC_SRC
= cc_table
[CC_OP
].compute_c();
226 void OPPROTO
op_decl_T0_cc(void)
228 CC_SRC
= cc_table
[CC_OP
].compute_c();
233 void OPPROTO
op_testl_T0_T1_cc(void)
238 /* operations without flags */
240 void OPPROTO
op_addl_T0_T1(void)
245 void OPPROTO
op_orl_T0_T1(void)
250 void OPPROTO
op_andl_T0_T1(void)
255 void OPPROTO
op_subl_T0_T1(void)
260 void OPPROTO
op_xorl_T0_T1(void)
265 void OPPROTO
op_negl_T0(void)
270 void OPPROTO
op_incl_T0(void)
275 void OPPROTO
op_decl_T0(void)
280 void OPPROTO
op_notl_T0(void)
285 void OPPROTO
op_bswapl_T0(void)
290 /* multiply/divide */
291 void OPPROTO
op_mulb_AL_T0(void)
294 res
= (uint8_t)EAX
* (uint8_t)T0
;
295 EAX
= (EAX
& 0xffff0000) | res
;
296 CC_SRC
= (res
& 0xff00);
299 void OPPROTO
op_imulb_AL_T0(void)
302 res
= (int8_t)EAX
* (int8_t)T0
;
303 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
304 CC_SRC
= (res
!= (int8_t)res
);
307 void OPPROTO
op_mulw_AX_T0(void)
310 res
= (uint16_t)EAX
* (uint16_t)T0
;
311 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
312 EDX
= (EDX
& 0xffff0000) | ((res
>> 16) & 0xffff);
316 void OPPROTO
op_imulw_AX_T0(void)
319 res
= (int16_t)EAX
* (int16_t)T0
;
320 EAX
= (EAX
& 0xffff0000) | (res
& 0xffff);
321 EDX
= (EDX
& 0xffff0000) | ((res
>> 16) & 0xffff);
322 CC_SRC
= (res
!= (int16_t)res
);
325 void OPPROTO
op_mull_EAX_T0(void)
328 res
= (uint64_t)((uint32_t)EAX
) * (uint64_t)((uint32_t)T0
);
334 void OPPROTO
op_imull_EAX_T0(void)
337 res
= (int64_t)((int32_t)EAX
) * (int64_t)((int32_t)T0
);
340 CC_SRC
= (res
!= (int32_t)res
);
343 void OPPROTO
op_imulw_T0_T1(void)
346 res
= (int16_t)T0
* (int16_t)T1
;
348 CC_SRC
= (res
!= (int16_t)res
);
351 void OPPROTO
op_imull_T0_T1(void)
354 res
= (int64_t)((int32_t)T0
) * (int64_t)((int32_t)T1
);
356 CC_SRC
= (res
!= (int32_t)res
);
359 /* division, flags are undefined */
360 /* XXX: add exceptions for overflow */
361 void OPPROTO
op_divb_AL_T0(void)
363 unsigned int num
, den
, q
, r
;
365 num
= (EAX
& 0xffff);
368 raise_exception(EXCP00_DIVZ
);
369 q
= (num
/ den
) & 0xff;
370 r
= (num
% den
) & 0xff;
371 EAX
= (EAX
& 0xffff0000) | (r
<< 8) | q
;
374 void OPPROTO
op_idivb_AL_T0(void)
381 raise_exception(EXCP00_DIVZ
);
382 q
= (num
/ den
) & 0xff;
383 r
= (num
% den
) & 0xff;
384 EAX
= (EAX
& 0xffff0000) | (r
<< 8) | q
;
387 void OPPROTO
op_divw_AX_T0(void)
389 unsigned int num
, den
, q
, r
;
391 num
= (EAX
& 0xffff) | ((EDX
& 0xffff) << 16);
394 raise_exception(EXCP00_DIVZ
);
395 q
= (num
/ den
) & 0xffff;
396 r
= (num
% den
) & 0xffff;
397 EAX
= (EAX
& 0xffff0000) | q
;
398 EDX
= (EDX
& 0xffff0000) | r
;
401 void OPPROTO
op_idivw_AX_T0(void)
405 num
= (EAX
& 0xffff) | ((EDX
& 0xffff) << 16);
408 raise_exception(EXCP00_DIVZ
);
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);
423 raise_exception(EXCP00_DIVZ
);
430 void OPPROTO
op_idivl_EAX_T0(void)
435 num
= EAX
| ((uint64_t)EDX
<< 32);
438 raise_exception(EXCP00_DIVZ
);
445 /* constant load & misc op */
447 void OPPROTO
op_movl_T0_im(void)
452 void OPPROTO
op_addl_T0_im(void)
457 void OPPROTO
op_andl_T0_ffff(void)
462 void OPPROTO
op_movl_T0_T1(void)
467 void OPPROTO
op_movl_T1_im(void)
472 void OPPROTO
op_addl_T1_im(void)
477 void OPPROTO
op_movl_T1_A0(void)
482 void OPPROTO
op_movl_A0_im(void)
487 void OPPROTO
op_addl_A0_im(void)
492 void OPPROTO
op_andl_A0_ffff(void)
499 void OPPROTO
op_ldub_T0_A0(void)
501 T0
= ldub((uint8_t *)A0
);
504 void OPPROTO
op_ldsb_T0_A0(void)
506 T0
= ldsb((int8_t *)A0
);
509 void OPPROTO
op_lduw_T0_A0(void)
511 T0
= lduw((uint8_t *)A0
);
514 void OPPROTO
op_ldsw_T0_A0(void)
516 T0
= ldsw((int8_t *)A0
);
519 void OPPROTO
op_ldl_T0_A0(void)
521 T0
= ldl((uint8_t *)A0
);
524 void OPPROTO
op_ldub_T1_A0(void)
526 T1
= ldub((uint8_t *)A0
);
529 void OPPROTO
op_ldsb_T1_A0(void)
531 T1
= ldsb((int8_t *)A0
);
534 void OPPROTO
op_lduw_T1_A0(void)
536 T1
= lduw((uint8_t *)A0
);
539 void OPPROTO
op_ldsw_T1_A0(void)
541 T1
= ldsw((int8_t *)A0
);
544 void OPPROTO
op_ldl_T1_A0(void)
546 T1
= ldl((uint8_t *)A0
);
549 void OPPROTO
op_stb_T0_A0(void)
551 stb((uint8_t *)A0
, T0
);
554 void OPPROTO
op_stw_T0_A0(void)
556 stw((uint8_t *)A0
, T0
);
559 void OPPROTO
op_stl_T0_A0(void)
561 stl((uint8_t *)A0
, T0
);
564 /* used for bit operations */
566 void OPPROTO
op_add_bitw_A0_T1(void)
568 A0
+= ((int32_t)T1
>> 4) << 1;
571 void OPPROTO
op_add_bitl_A0_T1(void)
573 A0
+= ((int32_t)T1
>> 5) << 2;
578 void OPPROTO
op_jmp_T0(void)
583 void OPPROTO
op_jmp_im(void)
588 void OPPROTO
op_int_im(void)
591 raise_exception(EXCP0D_GPF
);
594 void OPPROTO
op_int3(void)
597 raise_exception(EXCP03_INT3
);
600 void OPPROTO
op_into(void)
603 eflags
= cc_table
[CC_OP
].compute_all();
606 raise_exception(EXCP04_INTO
);
617 #include "ops_template.h"
621 #include "ops_template.h"
625 #include "ops_template.h"
630 void OPPROTO
op_movsbl_T0_T0(void)
635 void OPPROTO
op_movzbl_T0_T0(void)
640 void OPPROTO
op_movswl_T0_T0(void)
645 void OPPROTO
op_movzwl_T0_T0(void)
650 void OPPROTO
op_movswl_EAX_AX(void)
655 void OPPROTO
op_movsbw_AX_AL(void)
657 EAX
= (EAX
& 0xffff0000) | ((int8_t)EAX
& 0xffff);
660 void OPPROTO
op_movslq_EDX_EAX(void)
662 EDX
= (int32_t)EAX
>> 31;
665 void OPPROTO
op_movswl_DX_AX(void)
667 EDX
= (EDX
& 0xffff0000) | (((int16_t)EAX
>> 15) & 0xffff);
672 void op_pushl_T0(void)
676 stl((void *)offset
, T0
);
677 /* modify ESP after to handle exceptions correctly */
681 void op_pushw_T0(void)
685 stw((void *)offset
, T0
);
686 /* modify ESP after to handle exceptions correctly */
690 void op_pushl_ss32_T0(void)
694 stl(env
->seg_cache
[R_SS
].base
+ offset
, T0
);
695 /* modify ESP after to handle exceptions correctly */
699 void op_pushw_ss32_T0(void)
703 stw(env
->seg_cache
[R_SS
].base
+ offset
, T0
);
704 /* modify ESP after to handle exceptions correctly */
708 void op_pushl_ss16_T0(void)
711 offset
= (ESP
- 4) & 0xffff;
712 stl(env
->seg_cache
[R_SS
].base
+ offset
, T0
);
713 /* modify ESP after to handle exceptions correctly */
714 ESP
= (ESP
& ~0xffff) | offset
;
717 void op_pushw_ss16_T0(void)
720 offset
= (ESP
- 2) & 0xffff;
721 stw(env
->seg_cache
[R_SS
].base
+ offset
, T0
);
722 /* modify ESP after to handle exceptions correctly */
723 ESP
= (ESP
& ~0xffff) | offset
;
726 /* NOTE: ESP update is done after */
727 void op_popl_T0(void)
729 T0
= ldl((void *)ESP
);
732 void op_popw_T0(void)
734 T0
= lduw((void *)ESP
);
737 void op_popl_ss32_T0(void)
739 T0
= ldl(env
->seg_cache
[R_SS
].base
+ ESP
);
742 void op_popw_ss32_T0(void)
744 T0
= lduw(env
->seg_cache
[R_SS
].base
+ ESP
);
747 void op_popl_ss16_T0(void)
749 T0
= ldl(env
->seg_cache
[R_SS
].base
+ (ESP
& 0xffff));
752 void op_popw_ss16_T0(void)
754 T0
= lduw(env
->seg_cache
[R_SS
].base
+ (ESP
& 0xffff));
757 void op_addl_ESP_4(void)
762 void op_addl_ESP_2(void)
767 void op_addw_ESP_4(void)
769 ESP
= (ESP
& ~0xffff) | ((ESP
+ 4) & 0xffff);
772 void op_addw_ESP_2(void)
774 ESP
= (ESP
& ~0xffff) | ((ESP
+ 2) & 0xffff);
777 void op_addl_ESP_im(void)
782 void op_addw_ESP_im(void)
784 ESP
= (ESP
& ~0xffff) | ((ESP
+ PARAM1
) & 0xffff);
795 asm("rdtsc" : "=A" (val
));
797 /* better than nothing: the time increases */
807 void OPPROTO
op_aam(void)
814 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
818 void OPPROTO
op_aad(void)
823 ah
= (EAX
>> 8) & 0xff;
824 al
= ((ah
* base
) + al
) & 0xff;
825 EAX
= (EAX
& ~0xffff) | al
;
829 void OPPROTO
op_aaa(void)
835 eflags
= cc_table
[CC_OP
].compute_all();
838 ah
= (EAX
>> 8) & 0xff;
840 icarry
= (al
> 0xf9);
841 if (((al
& 0x0f) > 9 ) || af
) {
842 al
= (al
+ 6) & 0x0f;
843 ah
= (ah
+ 1 + icarry
) & 0xff;
844 eflags
|= CC_C
| CC_A
;
846 eflags
&= ~(CC_C
| CC_A
);
849 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
853 void OPPROTO
op_aas(void)
859 eflags
= cc_table
[CC_OP
].compute_all();
862 ah
= (EAX
>> 8) & 0xff;
865 if (((al
& 0x0f) > 9 ) || af
) {
866 al
= (al
- 6) & 0x0f;
867 ah
= (ah
- 1 - icarry
) & 0xff;
868 eflags
|= CC_C
| CC_A
;
870 eflags
&= ~(CC_C
| CC_A
);
873 EAX
= (EAX
& ~0xffff) | al
| (ah
<< 8);
877 void OPPROTO
op_daa(void)
882 eflags
= cc_table
[CC_OP
].compute_all();
888 if (((al
& 0x0f) > 9 ) || af
) {
889 al
= (al
+ 6) & 0xff;
892 if ((al
> 0x9f) || cf
) {
893 al
= (al
+ 0x60) & 0xff;
896 EAX
= (EAX
& ~0xff) | al
;
897 /* well, speed is not an issue here, so we compute the flags by hand */
898 eflags
|= (al
== 0) << 6; /* zf */
899 eflags
|= parity_table
[al
]; /* pf */
900 eflags
|= (al
& 0x80); /* sf */
904 void OPPROTO
op_das(void)
909 eflags
= cc_table
[CC_OP
].compute_all();
916 if (((al
& 0x0f) > 9 ) || af
) {
920 al
= (al
- 6) & 0xff;
922 if ((al1
> 0x99) || cf
) {
923 al
= (al
- 0x60) & 0xff;
926 EAX
= (EAX
& ~0xff) | al
;
927 /* well, speed is not an issue here, so we compute the flags by hand */
928 eflags
|= (al
== 0) << 6; /* zf */
929 eflags
|= parity_table
[al
]; /* pf */
930 eflags
|= (al
& 0x80); /* sf */
934 /* segment handling */
936 void load_seg(int seg_reg
, int selector
)
939 SegmentDescriptorTable
*dt
;
944 env
->segs
[seg_reg
] = selector
;
945 sc
= &env
->seg_cache
[seg_reg
];
947 sc
->base
= (void *)(selector
<< 4);
955 index
= selector
& ~7;
956 if ((index
+ 7) > dt
->limit
)
957 raise_exception(EXCP0D_GPF
);
958 ptr
= dt
->base
+ index
;
961 sc
->base
= (void *)((e1
>> 16) | ((e2
& 0xff) << 16) | (e2
& 0xff000000));
962 sc
->limit
= (e1
& 0xffff) | (e2
& 0x000f0000);
964 sc
->limit
= (sc
->limit
<< 12) | 0xfff;
965 sc
->seg_32bit
= (e2
>> 22) & 1;
967 fprintf(logfile
, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx seg_32bit=%d\n",
968 selector
, (unsigned long)sc
->base
, sc
->limit
, sc
->seg_32bit
);
973 void OPPROTO
op_movl_seg_T0(void)
975 load_seg(PARAM1
, T0
& 0xffff);
978 void OPPROTO
op_movl_T0_seg(void)
980 T0
= env
->segs
[PARAM1
];
983 void OPPROTO
op_addl_A0_seg(void)
985 A0
+= *(unsigned long *)((char *)env
+ PARAM1
);
990 /* slow jumps cases (compute x86 flags) */
991 void OPPROTO
op_jo_cc(void)
994 eflags
= cc_table
[CC_OP
].compute_all();
1002 void OPPROTO
op_jb_cc(void)
1004 if (cc_table
[CC_OP
].compute_c())
1011 void OPPROTO
op_jz_cc(void)
1014 eflags
= cc_table
[CC_OP
].compute_all();
1022 void OPPROTO
op_jbe_cc(void)
1025 eflags
= cc_table
[CC_OP
].compute_all();
1026 if (eflags
& (CC_Z
| CC_C
))
1033 void OPPROTO
op_js_cc(void)
1036 eflags
= cc_table
[CC_OP
].compute_all();
1044 void OPPROTO
op_jp_cc(void)
1047 eflags
= cc_table
[CC_OP
].compute_all();
1055 void OPPROTO
op_jl_cc(void)
1058 eflags
= cc_table
[CC_OP
].compute_all();
1059 if ((eflags
^ (eflags
>> 4)) & 0x80)
1066 void OPPROTO
op_jle_cc(void)
1069 eflags
= cc_table
[CC_OP
].compute_all();
1070 if (((eflags
^ (eflags
>> 4)) & 0x80) || (eflags
& CC_Z
))
1077 /* slow set cases (compute x86 flags) */
1078 void OPPROTO
op_seto_T0_cc(void)
1081 eflags
= cc_table
[CC_OP
].compute_all();
1082 T0
= (eflags
>> 11) & 1;
1085 void OPPROTO
op_setb_T0_cc(void)
1087 T0
= cc_table
[CC_OP
].compute_c();
1090 void OPPROTO
op_setz_T0_cc(void)
1093 eflags
= cc_table
[CC_OP
].compute_all();
1094 T0
= (eflags
>> 6) & 1;
1097 void OPPROTO
op_setbe_T0_cc(void)
1100 eflags
= cc_table
[CC_OP
].compute_all();
1101 T0
= (eflags
& (CC_Z
| CC_C
)) != 0;
1104 void OPPROTO
op_sets_T0_cc(void)
1107 eflags
= cc_table
[CC_OP
].compute_all();
1108 T0
= (eflags
>> 7) & 1;
1111 void OPPROTO
op_setp_T0_cc(void)
1114 eflags
= cc_table
[CC_OP
].compute_all();
1115 T0
= (eflags
>> 2) & 1;
1118 void OPPROTO
op_setl_T0_cc(void)
1121 eflags
= cc_table
[CC_OP
].compute_all();
1122 T0
= ((eflags
^ (eflags
>> 4)) >> 7) & 1;
1125 void OPPROTO
op_setle_T0_cc(void)
1128 eflags
= cc_table
[CC_OP
].compute_all();
1129 T0
= (((eflags
^ (eflags
>> 4)) & 0x80) || (eflags
& CC_Z
)) != 0;
1132 void OPPROTO
op_xor_T0_1(void)
1137 void OPPROTO
op_set_cc_op(void)
1142 void OPPROTO
op_movl_eflags_T0(void)
1145 DF
= 1 - (2 * ((T0
>> 10) & 1));
1148 /* XXX: compute only O flag */
1149 void OPPROTO
op_movb_eflags_T0(void)
1152 of
= cc_table
[CC_OP
].compute_all() & CC_O
;
1156 void OPPROTO
op_movl_T0_eflags(void)
1158 T0
= cc_table
[CC_OP
].compute_all();
1159 T0
|= (DF
& DIRECTION_FLAG
);
1162 void OPPROTO
op_cld(void)
1167 void OPPROTO
op_std(void)
1172 void OPPROTO
op_clc(void)
1175 eflags
= cc_table
[CC_OP
].compute_all();
1180 void OPPROTO
op_stc(void)
1183 eflags
= cc_table
[CC_OP
].compute_all();
1188 void OPPROTO
op_cmc(void)
1191 eflags
= cc_table
[CC_OP
].compute_all();
1196 void OPPROTO
op_salc(void)
1199 cf
= cc_table
[CC_OP
].compute_c();
1200 EAX
= (EAX
& ~0xff) | ((-cf
) & 0xff);
1203 static int compute_all_eflags(void)
1208 static int compute_c_eflags(void)
1210 return CC_SRC
& CC_C
;
1213 static int compute_c_mul(void)
1220 static int compute_all_mul(void)
1222 int cf
, pf
, af
, zf
, sf
, of
;
1224 pf
= 0; /* undefined */
1225 af
= 0; /* undefined */
1226 zf
= 0; /* undefined */
1227 sf
= 0; /* undefined */
1229 return cf
| pf
| af
| zf
| sf
| of
;
1232 CCTable cc_table
[CC_OP_NB
] = {
1233 [CC_OP_DYNAMIC
] = { /* should never happen */ },
1235 [CC_OP_EFLAGS
] = { compute_all_eflags
, compute_c_eflags
},
1237 [CC_OP_MUL
] = { compute_all_mul
, compute_c_mul
},
1239 [CC_OP_ADDB
] = { compute_all_addb
, compute_c_addb
},
1240 [CC_OP_ADDW
] = { compute_all_addw
, compute_c_addw
},
1241 [CC_OP_ADDL
] = { compute_all_addl
, compute_c_addl
},
1243 [CC_OP_ADCB
] = { compute_all_adcb
, compute_c_adcb
},
1244 [CC_OP_ADCW
] = { compute_all_adcw
, compute_c_adcw
},
1245 [CC_OP_ADCL
] = { compute_all_adcl
, compute_c_adcl
},
1247 [CC_OP_SUBB
] = { compute_all_subb
, compute_c_subb
},
1248 [CC_OP_SUBW
] = { compute_all_subw
, compute_c_subw
},
1249 [CC_OP_SUBL
] = { compute_all_subl
, compute_c_subl
},
1251 [CC_OP_SBBB
] = { compute_all_sbbb
, compute_c_sbbb
},
1252 [CC_OP_SBBW
] = { compute_all_sbbw
, compute_c_sbbw
},
1253 [CC_OP_SBBL
] = { compute_all_sbbl
, compute_c_sbbl
},
1255 [CC_OP_LOGICB
] = { compute_all_logicb
, compute_c_logicb
},
1256 [CC_OP_LOGICW
] = { compute_all_logicw
, compute_c_logicw
},
1257 [CC_OP_LOGICL
] = { compute_all_logicl
, compute_c_logicl
},
1259 [CC_OP_INCB
] = { compute_all_incb
, compute_c_incl
},
1260 [CC_OP_INCW
] = { compute_all_incw
, compute_c_incl
},
1261 [CC_OP_INCL
] = { compute_all_incl
, compute_c_incl
},
1263 [CC_OP_DECB
] = { compute_all_decb
, compute_c_incl
},
1264 [CC_OP_DECW
] = { compute_all_decw
, compute_c_incl
},
1265 [CC_OP_DECL
] = { compute_all_decl
, compute_c_incl
},
1267 [CC_OP_SHLB
] = { compute_all_shlb
, compute_c_shll
},
1268 [CC_OP_SHLW
] = { compute_all_shlw
, compute_c_shll
},
1269 [CC_OP_SHLL
] = { compute_all_shll
, compute_c_shll
},
1271 [CC_OP_SARB
] = { compute_all_sarb
, compute_c_shll
},
1272 [CC_OP_SARW
] = { compute_all_sarw
, compute_c_shll
},
1273 [CC_OP_SARL
] = { compute_all_sarl
, compute_c_shll
},
1276 /* floating point support */
1278 #ifdef USE_X86LDOUBLE
1279 /* use long double functions */
1280 #define lrint lrintl
1281 #define llrint llrintl
1289 #define atan2 atan2l
1290 #define floor floorl
1295 extern int lrint(CPU86_LDouble x
);
1296 extern int64_t llrint(CPU86_LDouble x
);
1297 extern CPU86_LDouble
fabs(CPU86_LDouble x
);
1298 extern CPU86_LDouble
sin(CPU86_LDouble x
);
1299 extern CPU86_LDouble
cos(CPU86_LDouble x
);
1300 extern CPU86_LDouble
sqrt(CPU86_LDouble x
);
1301 extern CPU86_LDouble
pow(CPU86_LDouble
, CPU86_LDouble
);
1302 extern CPU86_LDouble
log(CPU86_LDouble x
);
1303 extern CPU86_LDouble
tan(CPU86_LDouble x
);
1304 extern CPU86_LDouble
atan2(CPU86_LDouble
, CPU86_LDouble
);
1305 extern CPU86_LDouble
floor(CPU86_LDouble x
);
1306 extern CPU86_LDouble
ceil(CPU86_LDouble x
);
1307 extern CPU86_LDouble
rint(CPU86_LDouble x
);
1309 #define RC_MASK 0xc00
1310 #define RC_NEAR 0x000
1311 #define RC_DOWN 0x400
1313 #define RC_CHOP 0xc00
1315 #define MAXTAN 9223372036854775808.0
1317 #ifdef USE_X86LDOUBLE
1323 unsigned long long lower
;
1324 unsigned short upper
;
1328 /* the following deal with x86 long double-precision numbers */
1329 #define MAXEXPD 0x7fff
1330 #define EXPBIAS 16383
1331 #define EXPD(fp) (fp.l.upper & 0x7fff)
1332 #define SIGND(fp) ((fp.l.upper) & 0x8000)
1333 #define MANTD(fp) (fp.l.lower)
1334 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
1340 #ifndef WORDS_BIGENDIAN
1342 unsigned long lower
;
1348 unsigned long lower
;
1354 /* the following deal with IEEE double-precision numbers */
1355 #define MAXEXPD 0x7ff
1356 #define EXPBIAS 1023
1357 #define EXPD(fp) (((fp.l.upper) >> 20) & 0x7FF)
1358 #define SIGND(fp) ((fp.l.upper) & 0x80000000)
1359 #define MANTD(fp) (fp.ll & ((1LL << 52) - 1))
1360 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
1365 void OPPROTO
op_flds_FT0_A0(void)
1367 FT0
= ldfl((void *)A0
);
1370 void OPPROTO
op_fldl_FT0_A0(void)
1372 FT0
= ldfq((void *)A0
);
1375 /* helpers are needed to avoid static constant reference. XXX: find a better way */
1376 #ifdef USE_INT_TO_FLOAT_HELPERS
1378 void helper_fild_FT0_A0(void)
1380 FT0
= (CPU86_LDouble
)ldsw((void *)A0
);
1383 void helper_fildl_FT0_A0(void)
1385 FT0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1388 void helper_fildll_FT0_A0(void)
1390 FT0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1393 void OPPROTO
op_fild_FT0_A0(void)
1395 helper_fild_FT0_A0();
1398 void OPPROTO
op_fildl_FT0_A0(void)
1400 helper_fildl_FT0_A0();
1403 void OPPROTO
op_fildll_FT0_A0(void)
1405 helper_fildll_FT0_A0();
1410 void OPPROTO
op_fild_FT0_A0(void)
1412 FT0
= (CPU86_LDouble
)ldsw((void *)A0
);
1415 void OPPROTO
op_fildl_FT0_A0(void)
1417 FT0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1420 void OPPROTO
op_fildll_FT0_A0(void)
1422 FT0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1428 void OPPROTO
op_flds_ST0_A0(void)
1430 ST0
= ldfl((void *)A0
);
1433 void OPPROTO
op_fldl_ST0_A0(void)
1435 ST0
= ldfq((void *)A0
);
1438 #ifdef USE_X86LDOUBLE
1439 void OPPROTO
op_fldt_ST0_A0(void)
1441 ST0
= *(long double *)A0
;
1444 void helper_fldt_ST0_A0(void)
1446 CPU86_LDoubleU temp
;
1449 upper
= lduw((uint8_t *)A0
+ 8);
1450 /* XXX: handle overflow ? */
1451 e
= (upper
& 0x7fff) - 16383 + EXPBIAS
; /* exponent */
1452 e
|= (upper
>> 4) & 0x800; /* sign */
1453 temp
.ll
= ((ldq((void *)A0
) >> 11) & ((1LL << 52) - 1)) | ((uint64_t)e
<< 52);
1457 void OPPROTO
op_fldt_ST0_A0(void)
1459 helper_fldt_ST0_A0();
1463 /* helpers are needed to avoid static constant reference. XXX: find a better way */
1464 #ifdef USE_INT_TO_FLOAT_HELPERS
1466 void helper_fild_ST0_A0(void)
1468 ST0
= (CPU86_LDouble
)ldsw((void *)A0
);
1471 void helper_fildl_ST0_A0(void)
1473 ST0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1476 void helper_fildll_ST0_A0(void)
1478 ST0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1481 void OPPROTO
op_fild_ST0_A0(void)
1483 helper_fild_ST0_A0();
1486 void OPPROTO
op_fildl_ST0_A0(void)
1488 helper_fildl_ST0_A0();
1491 void OPPROTO
op_fildll_ST0_A0(void)
1493 helper_fildll_ST0_A0();
1498 void OPPROTO
op_fild_ST0_A0(void)
1500 ST0
= (CPU86_LDouble
)ldsw((void *)A0
);
1503 void OPPROTO
op_fildl_ST0_A0(void)
1505 ST0
= (CPU86_LDouble
)((int32_t)ldl((void *)A0
));
1508 void OPPROTO
op_fildll_ST0_A0(void)
1510 ST0
= (CPU86_LDouble
)((int64_t)ldq((void *)A0
));
1517 void OPPROTO
op_fsts_ST0_A0(void)
1519 stfl((void *)A0
, (float)ST0
);
1522 void OPPROTO
op_fstl_ST0_A0(void)
1524 stfq((void *)A0
, (double)ST0
);
1527 #ifdef USE_X86LDOUBLE
1528 void OPPROTO
op_fstt_ST0_A0(void)
1530 *(long double *)A0
= ST0
;
1533 void helper_fstt_ST0_A0(void)
1535 CPU86_LDoubleU temp
;
1539 stq((void *)A0
, (MANTD(temp
) << 11) | (1LL << 63));
1540 /* exponent + sign */
1541 e
= EXPD(temp
) - EXPBIAS
+ 16383;
1542 e
|= SIGND(temp
) >> 16;
1543 stw((uint8_t *)A0
+ 8, e
);
1546 void OPPROTO
op_fstt_ST0_A0(void)
1548 helper_fstt_ST0_A0();
1552 void OPPROTO
op_fist_ST0_A0(void)
1556 stw((void *)A0
, val
);
1559 void OPPROTO
op_fistl_ST0_A0(void)
1563 stl((void *)A0
, val
);
1566 void OPPROTO
op_fistll_ST0_A0(void)
1570 stq((void *)A0
, val
);
1575 #define MUL10(iv) ( iv + iv + (iv << 3) )
1577 void helper_fbld_ST0_A0(void)
1580 CPU86_LDouble fpsrcop
;
1584 /* in this code, seg/m32i will be used as temporary ptr/int */
1585 seg
= (uint8_t *)A0
+ 8;
1587 /* XXX: raise exception */
1591 /* XXX: raise exception */
1592 if ((v
& 0xf0) != 0)
1594 m32i
= v
; /* <-- d14 */
1596 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d13 */
1597 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d12 */
1599 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d11 */
1600 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d10 */
1602 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d9 */
1603 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d8 */
1604 fpsrcop
= ((CPU86_LDouble
)m32i
) * 100000000.0;
1607 m32i
= (v
>> 4); /* <-- d7 */
1608 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d6 */
1610 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d5 */
1611 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d4 */
1613 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d3 */
1614 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d2 */
1616 m32i
= MUL10(m32i
) + (v
>> 4); /* <-- val * 10 + d1 */
1617 m32i
= MUL10(m32i
) + (v
& 0xf); /* <-- val * 10 + d0 */
1618 fpsrcop
+= ((CPU86_LDouble
)m32i
);
1619 if ( ldub(seg
+9) & 0x80 )
1624 void OPPROTO
op_fbld_ST0_A0(void)
1626 helper_fbld_ST0_A0();
1629 void helper_fbst_ST0_A0(void)
1631 CPU86_LDouble fptemp
;
1632 CPU86_LDouble fpsrcop
;
1634 uint8_t *mem_ref
, *mem_end
;
1636 fpsrcop
= rint(ST0
);
1637 mem_ref
= (uint8_t *)A0
;
1638 mem_end
= mem_ref
+ 8;
1639 if ( fpsrcop
< 0.0 ) {
1640 stw(mem_end
, 0x8000);
1643 stw(mem_end
, 0x0000);
1645 while (mem_ref
< mem_end
) {
1648 fptemp
= floor(fpsrcop
/10.0);
1649 v
= ((int)(fpsrcop
- fptemp
*10.0));
1650 if (fptemp
== 0.0) {
1655 fptemp
= floor(fpsrcop
/10.0);
1656 v
|= (((int)(fpsrcop
- fptemp
*10.0)) << 4);
1660 while (mem_ref
< mem_end
) {
1665 void OPPROTO
op_fbst_ST0_A0(void)
1667 helper_fbst_ST0_A0();
1672 static inline void fpush(void)
1674 env
->fpstt
= (env
->fpstt
- 1) & 7;
1675 env
->fptags
[env
->fpstt
] = 0; /* validate stack entry */
1678 static inline void fpop(void)
1680 env
->fptags
[env
->fpstt
] = 1; /* invvalidate stack entry */
1681 env
->fpstt
= (env
->fpstt
+ 1) & 7;
1684 void OPPROTO
op_fpush(void)
1689 void OPPROTO
op_fpop(void)
1694 void OPPROTO
op_fdecstp(void)
1696 env
->fpstt
= (env
->fpstt
- 1) & 7;
1697 env
->fpus
&= (~0x4700);
1700 void OPPROTO
op_fincstp(void)
1702 env
->fpstt
= (env
->fpstt
+ 1) & 7;
1703 env
->fpus
&= (~0x4700);
1706 void OPPROTO
op_fmov_ST0_FT0(void)
1711 void OPPROTO
op_fmov_FT0_STN(void)
1716 void OPPROTO
op_fmov_ST0_STN(void)
1721 void OPPROTO
op_fmov_STN_ST0(void)
1726 void OPPROTO
op_fxchg_ST0_STN(void)
1734 /* FPU operations */
1736 /* XXX: handle nans */
1737 void OPPROTO
op_fcom_ST0_FT0(void)
1739 env
->fpus
&= (~0x4500); /* (C3,C2,C0) <-- 000 */
1741 env
->fpus
|= 0x100; /* (C3,C2,C0) <-- 001 */
1742 else if (ST0
== FT0
)
1743 env
->fpus
|= 0x4000; /* (C3,C2,C0) <-- 100 */
1747 /* XXX: handle nans */
1748 void OPPROTO
op_fucom_ST0_FT0(void)
1750 env
->fpus
&= (~0x4500); /* (C3,C2,C0) <-- 000 */
1752 env
->fpus
|= 0x100; /* (C3,C2,C0) <-- 001 */
1753 else if (ST0
== FT0
)
1754 env
->fpus
|= 0x4000; /* (C3,C2,C0) <-- 100 */
1758 void OPPROTO
op_fadd_ST0_FT0(void)
1763 void OPPROTO
op_fmul_ST0_FT0(void)
1768 void OPPROTO
op_fsub_ST0_FT0(void)
1773 void OPPROTO
op_fsubr_ST0_FT0(void)
1778 void OPPROTO
op_fdiv_ST0_FT0(void)
1783 void OPPROTO
op_fdivr_ST0_FT0(void)
1788 /* fp operations between STN and ST0 */
1790 void OPPROTO
op_fadd_STN_ST0(void)
1795 void OPPROTO
op_fmul_STN_ST0(void)
1800 void OPPROTO
op_fsub_STN_ST0(void)
1805 void OPPROTO
op_fsubr_STN_ST0(void)
1812 void OPPROTO
op_fdiv_STN_ST0(void)
1817 void OPPROTO
op_fdivr_STN_ST0(void)
1824 /* misc FPU operations */
1825 void OPPROTO
op_fchs_ST0(void)
1830 void OPPROTO
op_fabs_ST0(void)
1835 void helper_fxam_ST0(void)
1837 CPU86_LDoubleU temp
;
1842 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1844 env
->fpus
|= 0x200; /* C1 <-- 1 */
1846 expdif
= EXPD(temp
);
1847 if (expdif
== MAXEXPD
) {
1848 if (MANTD(temp
) == 0)
1849 env
->fpus
|= 0x500 /*Infinity*/;
1851 env
->fpus
|= 0x100 /*NaN*/;
1852 } else if (expdif
== 0) {
1853 if (MANTD(temp
) == 0)
1854 env
->fpus
|= 0x4000 /*Zero*/;
1856 env
->fpus
|= 0x4400 /*Denormal*/;
1862 void OPPROTO
op_fxam_ST0(void)
1867 void OPPROTO
op_fld1_ST0(void)
1869 ST0
= *(CPU86_LDouble
*)&f15rk
[1];
1872 void OPPROTO
op_fldl2t_ST0(void)
1874 ST0
= *(CPU86_LDouble
*)&f15rk
[6];
1877 void OPPROTO
op_fldl2e_ST0(void)
1879 ST0
= *(CPU86_LDouble
*)&f15rk
[5];
1882 void OPPROTO
op_fldpi_ST0(void)
1884 ST0
= *(CPU86_LDouble
*)&f15rk
[2];
1887 void OPPROTO
op_fldlg2_ST0(void)
1889 ST0
= *(CPU86_LDouble
*)&f15rk
[3];
1892 void OPPROTO
op_fldln2_ST0(void)
1894 ST0
= *(CPU86_LDouble
*)&f15rk
[4];
1897 void OPPROTO
op_fldz_ST0(void)
1899 ST0
= *(CPU86_LDouble
*)&f15rk
[0];
1902 void OPPROTO
op_fldz_FT0(void)
1904 ST0
= *(CPU86_LDouble
*)&f15rk
[0];
1907 void helper_f2xm1(void)
1909 ST0
= pow(2.0,ST0
) - 1.0;
1912 void helper_fyl2x(void)
1914 CPU86_LDouble fptemp
;
1918 fptemp
= log(fptemp
)/log(2.0); /* log2(ST) */
1922 env
->fpus
&= (~0x4700);
1927 void helper_fptan(void)
1929 CPU86_LDouble fptemp
;
1932 if((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
1938 env
->fpus
&= (~0x400); /* C2 <-- 0 */
1939 /* the above code is for |arg| < 2**52 only */
1943 void helper_fpatan(void)
1945 CPU86_LDouble fptemp
, fpsrcop
;
1949 ST1
= atan2(fpsrcop
,fptemp
);
1953 void helper_fxtract(void)
1955 CPU86_LDoubleU temp
;
1956 unsigned int expdif
;
1959 expdif
= EXPD(temp
) - EXPBIAS
;
1960 /*DP exponent bias*/
1967 void helper_fprem1(void)
1969 CPU86_LDouble dblq
, fpsrcop
, fptemp
;
1970 CPU86_LDoubleU fpsrcop1
, fptemp1
;
1976 fpsrcop1
.d
= fpsrcop
;
1978 expdif
= EXPD(fpsrcop1
) - EXPD(fptemp1
);
1980 dblq
= fpsrcop
/ fptemp
;
1981 dblq
= (dblq
< 0.0)? ceil(dblq
): floor(dblq
);
1982 ST0
= fpsrcop
- fptemp
*dblq
;
1983 q
= (int)dblq
; /* cutting off top bits is assumed here */
1984 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
1985 /* (C0,C1,C3) <-- (q2,q1,q0) */
1986 env
->fpus
|= (q
&0x4) << 6; /* (C0) <-- q2 */
1987 env
->fpus
|= (q
&0x2) << 8; /* (C1) <-- q1 */
1988 env
->fpus
|= (q
&0x1) << 14; /* (C3) <-- q0 */
1990 env
->fpus
|= 0x400; /* C2 <-- 1 */
1991 fptemp
= pow(2.0, expdif
-50);
1992 fpsrcop
= (ST0
/ ST1
) / fptemp
;
1993 /* fpsrcop = integer obtained by rounding to the nearest */
1994 fpsrcop
= (fpsrcop
-floor(fpsrcop
) < ceil(fpsrcop
)-fpsrcop
)?
1995 floor(fpsrcop
): ceil(fpsrcop
);
1996 ST0
-= (ST1
* fpsrcop
* fptemp
);
2000 void helper_fprem(void)
2002 CPU86_LDouble dblq
, fpsrcop
, fptemp
;
2003 CPU86_LDoubleU fpsrcop1
, fptemp1
;
2009 fpsrcop1
.d
= fpsrcop
;
2011 expdif
= EXPD(fpsrcop1
) - EXPD(fptemp1
);
2012 if ( expdif
< 53 ) {
2013 dblq
= fpsrcop
/ fptemp
;
2014 dblq
= (dblq
< 0.0)? ceil(dblq
): floor(dblq
);
2015 ST0
= fpsrcop
- fptemp
*dblq
;
2016 q
= (int)dblq
; /* cutting off top bits is assumed here */
2017 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2018 /* (C0,C1,C3) <-- (q2,q1,q0) */
2019 env
->fpus
|= (q
&0x4) << 6; /* (C0) <-- q2 */
2020 env
->fpus
|= (q
&0x2) << 8; /* (C1) <-- q1 */
2021 env
->fpus
|= (q
&0x1) << 14; /* (C3) <-- q0 */
2023 env
->fpus
|= 0x400; /* C2 <-- 1 */
2024 fptemp
= pow(2.0, expdif
-50);
2025 fpsrcop
= (ST0
/ ST1
) / fptemp
;
2026 /* fpsrcop = integer obtained by chopping */
2027 fpsrcop
= (fpsrcop
< 0.0)?
2028 -(floor(fabs(fpsrcop
))): floor(fpsrcop
);
2029 ST0
-= (ST1
* fpsrcop
* fptemp
);
2033 void helper_fyl2xp1(void)
2035 CPU86_LDouble fptemp
;
2038 if ((fptemp
+1.0)>0.0) {
2039 fptemp
= log(fptemp
+1.0) / log(2.0); /* log2(ST+1.0) */
2043 env
->fpus
&= (~0x4700);
2048 void helper_fsqrt(void)
2050 CPU86_LDouble fptemp
;
2054 env
->fpus
&= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2060 void helper_fsincos(void)
2062 CPU86_LDouble fptemp
;
2065 if ((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
2071 env
->fpus
&= (~0x400); /* C2 <-- 0 */
2072 /* the above code is for |arg| < 2**63 only */
2076 void helper_frndint(void)
2081 void helper_fscale(void)
2083 CPU86_LDouble fpsrcop
, fptemp
;
2086 fptemp
= pow(fpsrcop
,ST1
);
2090 void helper_fsin(void)
2092 CPU86_LDouble fptemp
;
2095 if ((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
2099 env
->fpus
&= (~0x400); /* C2 <-- 0 */
2100 /* the above code is for |arg| < 2**53 only */
2104 void helper_fcos(void)
2106 CPU86_LDouble fptemp
;
2109 if((fptemp
> MAXTAN
)||(fptemp
< -MAXTAN
)) {
2113 env
->fpus
&= (~0x400); /* C2 <-- 0 */
2114 /* the above code is for |arg5 < 2**63 only */
2118 /* associated heplers to reduce generated code length and to simplify
2119 relocation (FP constants are usually stored in .rodata section) */
2121 void OPPROTO
op_f2xm1(void)
2126 void OPPROTO
op_fyl2x(void)
2131 void OPPROTO
op_fptan(void)
2136 void OPPROTO
op_fpatan(void)
2141 void OPPROTO
op_fxtract(void)
2146 void OPPROTO
op_fprem1(void)
2152 void OPPROTO
op_fprem(void)
2157 void OPPROTO
op_fyl2xp1(void)
2162 void OPPROTO
op_fsqrt(void)
2167 void OPPROTO
op_fsincos(void)
2172 void OPPROTO
op_frndint(void)
2177 void OPPROTO
op_fscale(void)
2182 void OPPROTO
op_fsin(void)
2187 void OPPROTO
op_fcos(void)
2192 void OPPROTO
op_fnstsw_A0(void)
2195 fpus
= (env
->fpus
& ~0x3800) | (env
->fpstt
& 0x7) << 11;
2196 stw((void *)A0
, fpus
);
2199 void OPPROTO
op_fnstsw_EAX(void)
2202 fpus
= (env
->fpus
& ~0x3800) | (env
->fpstt
& 0x7) << 11;
2203 EAX
= (EAX
& 0xffff0000) | fpus
;
2206 void OPPROTO
op_fnstcw_A0(void)
2208 stw((void *)A0
, env
->fpuc
);
2211 void OPPROTO
op_fldcw_A0(void)
2214 env
->fpuc
= lduw((void *)A0
);
2215 /* set rounding mode */
2216 switch(env
->fpuc
& RC_MASK
) {
2219 rnd_type
= FE_TONEAREST
;
2222 rnd_type
= FE_DOWNWARD
;
2225 rnd_type
= FE_UPWARD
;
2228 rnd_type
= FE_TOWARDZERO
;
2231 fesetround(rnd_type
);
2234 void OPPROTO
op_fclex(void)
2236 env
->fpus
&= 0x7f00;
2239 void OPPROTO
op_fninit(void)
2254 /* threading support */
2255 void OPPROTO
op_lock(void)
2260 void OPPROTO
op_unlock(void)