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1 734 jeremybenn
/* Libgcc Target specific implementation.
2
   Copyright (C) 2012 Free Software Foundation, Inc.
3
   Contributed by KPIT Cummins Infosystems Limited.
4
 
5
   This file is part of GCC.
6
 
7
   GCC is free software; you can redistribute it and/or modify it under
8
   the terms of the GNU General Public License as published by the Free
9
   Software Foundation; either version 3, or (at your option) any later
10
   version.
11
 
12
   GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13
   WARRANTY; without even the implied warranty of MERCHANTABILITY or
14
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15
   for more details.
16
 
17
   Under Section 7 of GPL version 3, you are granted additional
18
   permissions described in the GCC Runtime Library Exception, version
19
   3.1, as published by the Free Software Foundation.
20
 
21
   You should have received a copy of the GNU General Public License and
22
   a copy of the GCC Runtime Library Exception along with this program;
23
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24
   .  */
25
 
26
#ifdef  L_mulsi3
27
        .text
28
        .align  4
29
        .globl  ___mulsi3
30
___mulsi3:
31
        movw    r4,r0
32
        movw    r2,r1
33
        /* Extended multiplication between the 2 lower words */
34
        muluw   r1,(r1,r0)
35
 
36
        /* Multiply the lower word of each parameter  */
37
        mulw    r2,r5
38
 
39
        /* With the higher word of the other  */
40
        mulw    r3,r4
41
 
42
        /* Add products to the higher part of the final result  */
43
        addw    r4,r1
44
        addw    r5,r1
45
        jump    (ra)
46
#endif
47
 
48
#ifdef L_divdi3
49
        .text
50
        .align 4
51
        .globl ___divdi3
52
 
53
___divdi3:
54
        push    $4, r7, ra
55
 
56
        /* Param #1 Long Long low bit first */
57
        loadd   12(sp), (r1, r0)
58
        loadd   16(sp), (r3, r2)
59
 
60
        /* Param #2 Long Long low bit first */
61
        loadd   20(sp), (r5, r4)
62
        loadd   24(sp), (r7, r6)
63
 
64
        /* Set neg to 0 */
65
        movw $0, r10
66
 
67
        subd $16, (sp)
68
 
69
        /* Compare if param1 is greater than 0 */
70
        cmpw $0, r3
71
        ble L4
72
 
73
        /* Invert param1 and neg */
74
        movd $-1, (r9, r8)      /* Temp set to FFFFFFFF */
75
        xord (r9, r8), (r1, r0) /* Xor low bits of param 1 with temp */
76
        xord (r9, r8), (r3, r2) /* Xor high bits of param 1 with temp */
77
        addd $1, (r1, r0)       /* Add 1 to low bits of param 1 */
78
        xorw $1, r10            /* Invert neg */
79
        bcc L4                  /* If no carry occurred go to L4 */
80
        addd $1, (r3, r2)       /* Add 1 to high bits of param 1 */
81
 
82
L4:     stord (r1, r0), 0(sp)
83
        stord (r3, r2), 4(sp)
84
 
85
        /* Compare if param2 is greater than 0 */
86
        cmpw $0, r7
87
        ble L5
88
 
89
        /* Invert param2 and neg */
90
        movd $-1, (r9, r8)      /* Temp set to FFFFFFFF */
91
        xord (r9, r8), (r5, r4) /* Xor low bits of param 2 with temp */
92
        xord (r9, r8), (r7, r6) /* Xor high bits of param 2 with temp */
93
        addd $1, (r5, r4)       /* Add 1 to low bits of param 2 */
94
        xorw $1, r10            /* Invert neg */
95
        bcc L5                  /* If no carry occurred go to L5 */
96
        addd $1, (r7, r6)       /* Add 1 to high bits of param 2 */
97
 
98
L5:     stord (r5, r4), 8(sp)
99
        stord (r7, r6), 12(sp)
100
        movw $0, r2
101
 
102
        /* Call udivmoddi3 */
103
#ifdef __PIC__
104
        loadd   ___udivmoddi3@cGOT(r12), (r1,r0)
105
        jal     (r1,r0)
106
#else
107
        bal (ra), ___udivmoddi3
108
#endif
109
 
110
        /* If (neg) */
111
        addd    $16, (sp)
112
        cmpw $0, r10            /* Compare 0 with neg */
113
        beq Lexit__
114
 
115
        /* Neg = -Neg */
116
        xord (r9, r8), (r1, r0) /* Xor low bits of ures with temp */
117
        xord (r9, r8), (r3, r2) /* Xor high bits of ures with temp */
118
        addd $1, (r1, r0)       /* Add 1 to low bits of ures */
119
        bcc Lexit__
120
        addd $1, (r3, r2)       /* Add 1 to high bit of ures */
121
 
122
Lexit__:
123
#  ifdef __ID_SHARED_LIB__
124
        pop     $2, r12
125
#  endif
126
        popret $4, r7, ra
127
#endif
128
 
129
#ifdef L_lshrdi3
130
        .text
131
        .align 4
132
        .globl ___lshrdi3
133
 
134
___lshrdi3:
135
        push    $3, r7
136
 
137
        /* Load parameters from stack in this order */
138
        movw r2, r6             /* Number of shifts */
139
        loadd   6(sp), (r1, r0) /* Low bits */
140
        loadd   10(sp), (r3, r2)/* High bits */
141
 
142
        xorw $-1, r6            /* Invert number of shifts */
143
        addw $1, r6             /* Add 1 by number of shifts */
144
 
145
        movw r6, r7             /* Copy number of shifts */
146
 
147
        tbit $15, r6            /* Test if number is negative */
148
        bfs L2                  /* If negative jump to L2 */
149
 
150
        movd (r1, r0), (r9, r8) /* Copy low bits */
151
 
152
        subw $32, r7            /* Calc how many bits will overflow */
153
        /* Shift the temp low bit to the right to see the overflowing bits  */
154
        lshd r7, (r9, r8)
155
 
156
        cmpw $32, r6            /* If number of shifts is higher than 31 */
157
        blt L1                  /* Shift by moving */
158
 
159
        lshd r6, (r3, r2)       /* Shift high bits */
160
        lshd r6, (r1, r0)       /* Shift low bits */
161
        addd (r9, r8), (r3, r2) /* Add overflow to the high bits */
162
        popret  $3, r7          /* Return */
163
 
164
L1:     movd $0, (r1, r0)       /* Reset low bit */
165
        movd (r9, r8), (r3, r2) /* Add the overflow from the low bit */
166
        popret  $3, r7          /* Return */
167
 
168
L2:     movd (r3, r2), (r9, r8) /* Copy high bits */
169
 
170
        addw $32, r7            /* Calc how many bits will overflow */
171
        /* Shift the temp low bit to the left to see the overflowing bits  */
172
        lshd r7, (r9, r8)
173
 
174
        cmpw $-32, r6           /* If number of shifts is lower than -31 */
175
        bgt L3                  /* Shift by moving */
176
 
177
        lshd r6, (r1, r0)       /* Shift low bits */
178
        lshd r6, (r3, r2)       /* Shift high bits */
179
        addd (r9, r8), (r1, r0) /* Add overflow to the low bits */
180
        popret  $3, r7          /* Return */
181
 
182
L3:     movd $0, (r3, r2)       /* Reset the high bit */
183
        movd (r9, r8), (r1, r0) /* Add the overflow from the high bit */
184
        popret  $3, r7          /* Return */
185
#endif
186
 
187
#ifdef L_moddi3
188
        .text
189
        .align 4
190
        .globl ___moddi3
191
 
192
___moddi3:
193
        push    $4, r7, ra
194
 
195
        /* Param #1 Long Long low bit first */
196
        loadd   12(sp), (r1, r0)
197
        loadd   16(sp), (r3, r2)
198
 
199
        /* Param #2 Long Long low bit first */
200
        loadd   20(sp), (r5, r4)
201
        loadd   24(sp), (r7, r6)
202
 
203
        subd    $18, (sp)
204
 
205
        /* Set neg to 0 */
206
        storw $0, 16(sp)
207
 
208
        movd    $-1, (r9, r8)   /* Temp set to FFFFFFFF */
209
 
210
        /* Compare if param1 is greater than 0 */
211
        cmpw $0, r3
212
        ble L4
213
 
214
        /* Invert param1 and neg */
215
        xord (r9, r8), (r1, r0) /* Xor low bits of param 1 with temp */
216
        xord (r9, r8), (r3, r2) /* Xor high bits of param 1 with temp */
217
        addd $1, (r1, r0)       /* Add 1 to low bits of param 1 */
218
        storw $1, 16(sp)
219
        bcc L4                  /* If no carry occurred go to L4 */
220
        addd $1, (r3, r2)       /* Add 1 to high bits of param 1 */
221
 
222
L4:     stord (r1, r0), 0(sp)
223
        stord (r3, r2), 4(sp)
224
 
225
        /* Compare if param2 is greater than 0 */
226
        cmpw $0, r7
227
        ble L5
228
 
229
        /* Invert param2 and neg */
230
        xord (r9, r8), (r5, r4) /* Xor low bits of param 2 with temp */
231
        xord (r9, r8), (r7, r6) /* Xor high bits of param 2 with temp */
232
        addd $1, (r5, r4)       /* Add 1 to low bits of param 2 */
233
        bcc L5                  /* If no carry occurred go to L5 */
234
        addd $1, (r7, r6)       /* Add 1 to high bits of param 2 */
235
 
236
L5:     stord (r5, r4), 8(sp)
237
        stord (r7, r6), 12(sp)
238
        movw $1, r2
239
 
240
        /* Call udivmoddi3 */
241
#ifdef __PIC__
242
        loadd   ___udivmoddi3@cGOT(r12), (r1,r0)
243
        jal     (r1,r0)
244
#else
245
        bal (ra), ___udivmoddi3
246
#endif
247
 
248
        /* If (neg) */
249
        loadw 16(sp), r10       /* Load neg from stack */
250
        addd    $18, (sp)
251
        cmpw $0, r10            /* Compare 0 with neg */
252
        beq     Lexit__
253
 
254
        /* Neg = -Neg */
255
        xord (r9, r8), (r1, r0) /* Xor low bits of ures with temp */
256
        xord (r9, r8), (r3, r2) /* Xor high bits of ures with temp */
257
        addd $1, (r1, r0)       /* Add 1 to low bits of ures */
258
        bcc     Lexit__
259
        addd $1, (r3, r2)       /* Add 1 to high bit of ures */
260
Lexit__:
261
#  ifdef __ID_SHARED_LIB__
262
        pop     $2, r12
263
#  endif
264
        popret  $4, r7, ra
265
#endif
266
 
267
#ifdef L_muldi3
268
        .text
269
        .align 4
270
        .globl ___muldi3
271
 
272
___muldi3:
273
        push    $2, r13
274
        push    $7, r7
275
 
276
        /* Param #1 Long Long low bit first */
277
        loadd   18(sp), (r1, r0)
278
        loadd   22(sp), (r3, r2)
279
 
280
        /* Param #2 Long Long low bit first */
281
        loadd   26(sp), (r5, r4)
282
        loadd   30(sp), (r7, r6)
283
 
284
        /* Clear r13, r12 */
285
        movd $0, (r12)
286
        movd $0, (r13)
287
 
288
        /* Set neg */
289
        movw $0, r10
290
 
291
        /* Compare if param1 is greater than 0 */
292
        cmpw $0, r3
293
        ble L1
294
 
295
        /* Invert param1 and neg */
296
        movd $-1, (r9, r8)      /* Temp set to FFFFFFFF */
297
        xord (r9, r8), (r1, r0) /* Xor low bits of param 1 with temp */
298
        xord (r9, r8), (r3, r2) /* Xor high bits of param 1 with temp */
299
        addd $1, (r1, r0)       /* Add 1 to low bits of param 1 */
300
        xorw $1, r10            /* Invert neg */
301
        bcc L1                  /* If no carry occurred go to L1 */
302
        addd $1, (r3, r2)       /* Add 1 to high bits of param 1 */
303
 
304
L1:     /* Compare if param2 is greater than 0 */
305
        cmpw $0, r7
306
        ble L2
307
 
308
        /* Invert param2 and neg */
309
        movd $-1, (r9, r8)      /* Temp set to FFFFFFFF */
310
        xord (r9, r8), (r5, r4) /* Xor low bits of param 2 with temp */
311
        xord (r9, r8), (r7, r6) /* Xor high bits of param 2 with temp */
312
        addd $1, (r5, r4)       /* Add 1 to low bits of param 2 */
313
        xorw $1, r10            /* Invert neg */
314
        bcc L2                  /* If no carry occurred go to L2 */
315
        addd $1, (r7, r6)       /* Add 1 to high bits of param 2 */
316
 
317
L2:     storw r10, 18(sp)       /* Store neg to stack so we can use r10 */
318
 
319
        /* B*D */
320
        /* Bl*Dl */
321
        macuw r0, r4, (r12)     /* Multiply r0 and r4 and add to r12 */
322
 
323
        /* Bh*Dl */
324
        movd $0, (r9, r8)       /* Clear r9, r8 */
325
        macuw r1, r4, (r9, r8)  /* Multiply Bh*Dl and add result to (r9, r8) */
326
        movw r9,  r10           /* Shift left: r9 to r10 */
327
        lshd $16, (r9, r8)      /* Shift left: r8 to r9 */
328
        movw $0, r11            /* Clear r11 */
329
        addd (r9, r8), (r12)    /* Add (r9, r8) to r12 */
330
        bcc L3                  /* If no carry occurred go to L3 */
331
        addd $1, (r13)          /* If carry occurred add 1 to r13 */
332
 
333
L3:     addd (r11, r10), (r13)  /* Add (r11, r10) to r13 */
334
 
335
        /* Bl*Dh */
336
        movd $0, (r9, r8)       /* Clear (r9, r8) */
337
        macuw r0, r5, (r9, r8)  /* Multiply r0 and r5 and stor in (r9, r8) */
338
        movw r9, r10            /* Shift left: r9 to r10 */
339
        lshd $16, (r9, r8)      /* Shift left: r8 to r9 */
340
        addd (r9, r8), (r12)    /* Add (r9, r8) to r12 */
341
        bcc L4                  /* If no carry occurred go to L4 */
342
        addd $1, (r13)          /* If carry occurred add 1 to r13 */
343
 
344
L4:     addd (r11, r10), (r13)  /* Add (r11, r10) to r13 */
345
 
346
        /* Bh*Dh */
347
        movd $0, (r9, r8)       /* Clear (r9, r8) */
348
        macuw r1, r5, (r9, r8)  /* Multiply r1 and r5 and add to r13 */
349
        addd (r9, r8), (r13)    /* Add (r9, r8) to result */
350
 
351
        /* A*D */
352
        /* Al*Dl */
353
        movd $0, (r11, r10)     /* Clear (r11, r10) */
354
        macuw r2, r4, (r11, r10)/* Multiply r2 and r4 and add to (r11, r10) */
355
 
356
        addd (r13), (r11, r10)  /* Copy r13 to (r11, r10) */
357
 
358
        /* Al*Dh */
359
        movd $0, (r9, r8)       /* Clear (r9, r8) */
360
        macuw r2, r5, (r9, r8)  /* Multiply r2 and r5 and add to (r9, r8) */
361
        addw r8, r11            /* Add r8 to r11 */
362
 
363
        /* Ah*Dl */
364
        muluw r3, (r5, r4)      /* Multiply r3 and r4 and stor in (r5, r4) */
365
        addw r4, r11            /* Add r4 to r11 */
366
 
367
        /* B*C */
368
        /* Bl*Cl */
369
        movd $0, (r9, r8)       /* Clear (r9, r8) */
370
        macuw r0, r6, (r9, r8)  /* Multiply r0 and r6 and add to (r9, r8) */
371
        addd (r9, r8), (r11, r10)/* Add (r9, r8) to result */
372
 
373
        /* Bl*Ch */
374
        movd $0, (r9, r8)       /* Clear (r9, r8) */
375
        macuw r0, r7, (r9, r8)  /* Multiply r0 and r7 and add to (r9, r8) */
376
        addw r8, r11            /* Add r8 to r11 */
377
 
378
        loadw 18(sp), r8        /* Load neg from stack */
379
 
380
        /* Bh*Cl */
381
        muluw r1, (r7, r6)      /* Multiply r1 and r6 and stor in (r7, r6) */
382
        addw r6, r11            /* Add r6 to r11 */
383
 
384
E1:     movd (r11, r10), (r3, r2)
385
        movd (r12), (r1, r0)
386
 
387
        /* If (neg) */
388
        cmpw $0, r8             /* Compare 0 with neg */
389
        beq     Lexit__
390
 
391
        /* Neg = -Neg */
392
        movd $-1, (r9, r8)      /* Temp set to FFFFFFFF */
393
        xord (r9, r8), (r1, r0) /* Xor low bits of result with temp */
394
        xord (r9, r8), (r3, r2) /* Xor high bits of result with temp */
395
        addd $1, (r1, r0)       /* Add 1 to low bits of result */
396
        bcc     Lexit__
397
        addd $1, (r3, r2)       /* Add 1 to high bit of result */
398
Lexit__:
399
        pop     $7, r7
400
        popret  $2, r13
401
#endif
402
 
403
#ifdef L_negdi2
404
        .text
405
        .align 4
406
        .globl ___negdi2
407
 
408
___negdi2:
409
        /* Load parameter from the registers in this order */
410
        loadd 0(sp), (r1, r0)
411
        loadd 4(sp), (r3, r2)
412
 
413
        movd $-1, (r6, r5)      /* Set temp to FFFFFFFF */
414
        xord (r6, r5), (r1, r0) /* Xor low bits with temp */
415
        xord (r6, r5), (r3, r2) /* Xor high bits with temp */
416
        addd $1, (r1, r0)       /* Add one */
417
        jcc (ra)
418
        addd $1, (r3, r2)       /* Add the carry to the high bits */
419
        jump (ra)
420
#endif
421
 
422
#ifdef L_udivdi3
423
        .text
424
        .align 4
425
        .globl ___udivdi3
426
 
427
___udivdi3:
428
        movw $0, r2
429
        br ___udivmoddi3
430
#endif
431
 
432
#ifdef L_udivmoddi3
433
        .text
434
        .align 4
435
        .globl ___udivmoddi3
436
 
437
___udivmoddi3:
438
        push    $2, r13
439
        push    $7, r7
440
 
441
        /* Param #1 Long Long low bit first */
442
        loadd   18(sp), (r1, r0)
443
        storw   r2, 18(sp)      /* Store modulo on stack */
444
        loadd   22(sp), (r3, r2)
445
 
446
        /* Param #2 Long Long low bit first */
447
        loadd   26(sp), (r5, r4)
448
        loadd   30(sp), (r7, r6)
449
 
450
        /* Set ures to 0 */
451
        movd $0, (r13)
452
        movd $0, (r12)
453
 
454
        cmpd (r12), (r5, r4)
455
        beq LE
456
 
457
L5:     movd $1, (r9, r8)       /* Store 1 in low bits from bit */
458
        movd $0, (r11, r10)     /* Store 0 in high bits from bit */
459
 
460
L6:     /* While (den < num && (!den & (1LL<<63))) */
461
        /* Compare high bits from param 1 and param 2 */
462
        cmpd (r7, r6), (r3, r2)
463
        bhi L10                 /* If param 2 is greater go to L10 */
464
        bne L8                  /* If param 1 is greater go to L8 */
465
        cmpd (r5, r4), (r1, r0) /* Compare low bits from param 1 and param 2 */
466
        /*  If param 2 is greater or the same go to L1 */
467
        bhs L10
468
 
469
L8:     /* Check if most significant bit of param 2 is set */
470
        tbit $15, r7
471
        bfs L10                 /* If PSR is set go to L10 */
472
 
473
        /* Shift bit */
474
        lshd $1, (r11, r10)     /* Shift left: high bits of bit */
475
        /* Check if most significant bit of bit is set */
476
        tbit $15, r9
477
        lshd $1, (r9, r8)       /* Shift left: low bits of bit */
478
        bfs L28                 /* If PSR is set go to L28 */
479
 
480
L9:     /* Shift b */
481
        lshd $1, (r7, r6)       /* Shift left: high bits of param 2 */
482
        /* Check if most significant bit of param 2 is set */
483
        tbit $15, r5
484
        lshd $1, (r5, r4)       /* Shift left: low bits of param 2 */
485
        bfc L6                  /* If PSR is set go to L6 */
486
        addw $1, r6             /* Add 1 to the highest bits of b */
487
        br L6                   /* Go to L6 */
488
 
489
L10:    /* While (bit) */
490
        cmpd $0, (r11, r10)
491
        bne L11
492
        cmpd $0, (r9, r8)
493
        beq E1
494
 
495
L11:    /* If (num >= den) */
496
        cmpd (r3, r2), (r7, r6) /* Compare high bits of param 1 and param 2 */
497
        blo L15                 /* If param 1 lower than param 2 go to L15 */
498
        bne L12                 /* If not equal go to L12 */
499
        cmpd (r1, r0), (r5, r4) /* Compare low bits of param 1 and param 2 */
500
        blo L15                 /* If param 1 lower than param 2 go to L15 */
501
 
502
L12:    /* Ures |= bit */
503
        ord (r11, r10), (r13)
504
        ord (r9, r8), (r12)
505
 
506
        /* Num -= den */
507
        subd (r7, r6), (r3, r2) /* Subtract highest 32 bits from each other */
508
        subd (r5, r4), (r1, r0) /* Subtract lowest 32 bits from each other */
509
        bcc L15                 /* If no carry occurred go to L15 */
510
        subd $1, (r3, r2)       /* Subtract the carry */
511
 
512
L15:    /* Shift bit to the right */
513
        lshd $-1, (r9, r8)      /* Shift right: low bits of bit */
514
        /* Check if least significant bit of high bits is set */
515
        tbit $0, r10
516
        lshd $-1, (r11, r10)    /* Shift right: high bits of bit */
517
        bfs L18                 /* If PSR is set go to L18 */
518
 
519
L17:    /* Shift param#2 to the right */
520
        lshd $-1, (r5, r4)      /* Shift right: low bits of param 2 */
521
        /* Check if least significant bit of high bits is set */
522
        tbit $0, r6
523
        lshd $-1, (r7, r6)      /* Shift right: high bits of param 2 */
524
        bfc L10                 /* If PSR is not set go to L10 */
525
        /* Or with 0x8000 to set most significant bit */
526
        orw $32768, r5
527
        br L10                  /* Go to L10 */
528
 
529
L18:    /* Or with 0x8000 to set most significant bit */
530
        orw $32768, r9
531
        br L17
532
 
533
L28:    /* Left shift bit */
534
        addw $1, r10            /* Add 1 to highest bits of bit */
535
        br L9                   /* Go to L9 */
536
 
537
LE:     cmpd (r12), (r7, r6)
538
        bne L5
539
        excp dvz
540
        br      Lexit__
541
 
542
E1:     loadw   18(sp), r4
543
        cmpw $0, r4
544
        bne     Lexit__
545
 
546
        /* Return result */
547
        movd (r12), (r1, r0)
548
        movd (r13), (r3, r2)
549
Lexit__:
550
        pop     $7, r7
551
        popret  $2, r13
552
#endif
553
 
554
#ifdef L_umoddi3
555
        .text
556
        .align 4
557
        .globl ___umoddi3
558
 
559
___umoddi3:
560
        movw $1, r2
561
        br ___udivmoddi3
562
#endif
563
 

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