Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
[deliverable/linux.git] / arch / mips / mm / uasm.c
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * A small micro-assembler. It is intentionally kept simple, does only
7 * support a subset of instructions, and does not try to hide pipeline
8 * effects like branch delay slots.
9 *
10 * Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer
11 * Copyright (C) 2005, 2007 Maciej W. Rozycki
12 * Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
13 * Copyright (C) 2012, 2013 MIPS Technologies, Inc. All rights reserved.
14 */
15
16 enum fields {
17 RS = 0x001,
18 RT = 0x002,
19 RD = 0x004,
20 RE = 0x008,
21 SIMM = 0x010,
22 UIMM = 0x020,
23 BIMM = 0x040,
24 JIMM = 0x080,
25 FUNC = 0x100,
26 SET = 0x200,
27 SCIMM = 0x400,
28 SIMM9 = 0x800,
29 };
30
31 #define OP_MASK 0x3f
32 #define OP_SH 26
33 #define RD_MASK 0x1f
34 #define RD_SH 11
35 #define RE_MASK 0x1f
36 #define RE_SH 6
37 #define IMM_MASK 0xffff
38 #define IMM_SH 0
39 #define JIMM_MASK 0x3ffffff
40 #define JIMM_SH 0
41 #define FUNC_MASK 0x3f
42 #define FUNC_SH 0
43 #define SET_MASK 0x7
44 #define SET_SH 0
45 #define SIMM9_SH 7
46 #define SIMM9_MASK 0x1ff
47
48 enum opcode {
49 insn_invalid,
50 insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1,
51 insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
52 insn_bne, insn_cache, insn_cfc1, insn_cfcmsa, insn_ctc1, insn_ctcmsa,
53 insn_daddiu, insn_daddu, insn_di, insn_dins, insn_dinsm, insn_divu,
54 insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll,
55 insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32, insn_dsubu, insn_eret,
56 insn_ext, insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb,
57 insn_ld, insn_ldx, insn_lh, insn_ll, insn_lld, insn_lui, insn_lw,
58 insn_lwx, insn_mfc0, insn_mfhc0, insn_mfhi, insn_mflo, insn_mtc0,
59 insn_mthc0, insn_mthi, insn_mtlo, insn_mul, insn_or, insn_ori,
60 insn_pref, insn_rfe, insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll,
61 insn_sllv, insn_slt, insn_sltiu, insn_sltu, insn_sra, insn_srl,
62 insn_srlv, insn_subu, insn_sw, insn_sync, insn_syscall, insn_tlbp,
63 insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait, insn_wsbh, insn_xor,
64 insn_xori, insn_yield, insn_lddir, insn_ldpte,
65 };
66
67 struct insn {
68 enum opcode opcode;
69 u32 match;
70 enum fields fields;
71 };
72
73 static inline u32 build_rs(u32 arg)
74 {
75 WARN(arg & ~RS_MASK, KERN_WARNING "Micro-assembler field overflow\n");
76
77 return (arg & RS_MASK) << RS_SH;
78 }
79
80 static inline u32 build_rt(u32 arg)
81 {
82 WARN(arg & ~RT_MASK, KERN_WARNING "Micro-assembler field overflow\n");
83
84 return (arg & RT_MASK) << RT_SH;
85 }
86
87 static inline u32 build_rd(u32 arg)
88 {
89 WARN(arg & ~RD_MASK, KERN_WARNING "Micro-assembler field overflow\n");
90
91 return (arg & RD_MASK) << RD_SH;
92 }
93
94 static inline u32 build_re(u32 arg)
95 {
96 WARN(arg & ~RE_MASK, KERN_WARNING "Micro-assembler field overflow\n");
97
98 return (arg & RE_MASK) << RE_SH;
99 }
100
101 static inline u32 build_simm(s32 arg)
102 {
103 WARN(arg > 0x7fff || arg < -0x8000,
104 KERN_WARNING "Micro-assembler field overflow\n");
105
106 return arg & 0xffff;
107 }
108
109 static inline u32 build_uimm(u32 arg)
110 {
111 WARN(arg & ~IMM_MASK, KERN_WARNING "Micro-assembler field overflow\n");
112
113 return arg & IMM_MASK;
114 }
115
116 static inline u32 build_scimm(u32 arg)
117 {
118 WARN(arg & ~SCIMM_MASK,
119 KERN_WARNING "Micro-assembler field overflow\n");
120
121 return (arg & SCIMM_MASK) << SCIMM_SH;
122 }
123
124 static inline u32 build_scimm9(s32 arg)
125 {
126 WARN((arg > 0xff || arg < -0x100),
127 KERN_WARNING "Micro-assembler field overflow\n");
128
129 return (arg & SIMM9_MASK) << SIMM9_SH;
130 }
131
132 static inline u32 build_func(u32 arg)
133 {
134 WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");
135
136 return arg & FUNC_MASK;
137 }
138
139 static inline u32 build_set(u32 arg)
140 {
141 WARN(arg & ~SET_MASK, KERN_WARNING "Micro-assembler field overflow\n");
142
143 return arg & SET_MASK;
144 }
145
146 static void build_insn(u32 **buf, enum opcode opc, ...);
147
148 #define I_u1u2u3(op) \
149 Ip_u1u2u3(op) \
150 { \
151 build_insn(buf, insn##op, a, b, c); \
152 } \
153 UASM_EXPORT_SYMBOL(uasm_i##op);
154
155 #define I_s3s1s2(op) \
156 Ip_s3s1s2(op) \
157 { \
158 build_insn(buf, insn##op, b, c, a); \
159 } \
160 UASM_EXPORT_SYMBOL(uasm_i##op);
161
162 #define I_u2u1u3(op) \
163 Ip_u2u1u3(op) \
164 { \
165 build_insn(buf, insn##op, b, a, c); \
166 } \
167 UASM_EXPORT_SYMBOL(uasm_i##op);
168
169 #define I_u3u2u1(op) \
170 Ip_u3u2u1(op) \
171 { \
172 build_insn(buf, insn##op, c, b, a); \
173 } \
174 UASM_EXPORT_SYMBOL(uasm_i##op);
175
176 #define I_u3u1u2(op) \
177 Ip_u3u1u2(op) \
178 { \
179 build_insn(buf, insn##op, b, c, a); \
180 } \
181 UASM_EXPORT_SYMBOL(uasm_i##op);
182
183 #define I_u1u2s3(op) \
184 Ip_u1u2s3(op) \
185 { \
186 build_insn(buf, insn##op, a, b, c); \
187 } \
188 UASM_EXPORT_SYMBOL(uasm_i##op);
189
190 #define I_u2s3u1(op) \
191 Ip_u2s3u1(op) \
192 { \
193 build_insn(buf, insn##op, c, a, b); \
194 } \
195 UASM_EXPORT_SYMBOL(uasm_i##op);
196
197 #define I_u2u1s3(op) \
198 Ip_u2u1s3(op) \
199 { \
200 build_insn(buf, insn##op, b, a, c); \
201 } \
202 UASM_EXPORT_SYMBOL(uasm_i##op);
203
204 #define I_u2u1msbu3(op) \
205 Ip_u2u1msbu3(op) \
206 { \
207 build_insn(buf, insn##op, b, a, c+d-1, c); \
208 } \
209 UASM_EXPORT_SYMBOL(uasm_i##op);
210
211 #define I_u2u1msb32u3(op) \
212 Ip_u2u1msbu3(op) \
213 { \
214 build_insn(buf, insn##op, b, a, c+d-33, c); \
215 } \
216 UASM_EXPORT_SYMBOL(uasm_i##op);
217
218 #define I_u2u1msbdu3(op) \
219 Ip_u2u1msbu3(op) \
220 { \
221 build_insn(buf, insn##op, b, a, d-1, c); \
222 } \
223 UASM_EXPORT_SYMBOL(uasm_i##op);
224
225 #define I_u1u2(op) \
226 Ip_u1u2(op) \
227 { \
228 build_insn(buf, insn##op, a, b); \
229 } \
230 UASM_EXPORT_SYMBOL(uasm_i##op);
231
232 #define I_u2u1(op) \
233 Ip_u1u2(op) \
234 { \
235 build_insn(buf, insn##op, b, a); \
236 } \
237 UASM_EXPORT_SYMBOL(uasm_i##op);
238
239 #define I_u1s2(op) \
240 Ip_u1s2(op) \
241 { \
242 build_insn(buf, insn##op, a, b); \
243 } \
244 UASM_EXPORT_SYMBOL(uasm_i##op);
245
246 #define I_u1(op) \
247 Ip_u1(op) \
248 { \
249 build_insn(buf, insn##op, a); \
250 } \
251 UASM_EXPORT_SYMBOL(uasm_i##op);
252
253 #define I_0(op) \
254 Ip_0(op) \
255 { \
256 build_insn(buf, insn##op); \
257 } \
258 UASM_EXPORT_SYMBOL(uasm_i##op);
259
260 I_u2u1s3(_addiu)
261 I_u3u1u2(_addu)
262 I_u2u1u3(_andi)
263 I_u3u1u2(_and)
264 I_u1u2s3(_beq)
265 I_u1u2s3(_beql)
266 I_u1s2(_bgez)
267 I_u1s2(_bgezl)
268 I_u1s2(_bltz)
269 I_u1s2(_bltzl)
270 I_u1u2s3(_bne)
271 I_u2s3u1(_cache)
272 I_u1u2(_cfc1)
273 I_u2u1(_cfcmsa)
274 I_u1u2(_ctc1)
275 I_u2u1(_ctcmsa)
276 I_u1u2u3(_dmfc0)
277 I_u1u2u3(_dmtc0)
278 I_u2u1s3(_daddiu)
279 I_u3u1u2(_daddu)
280 I_u1(_di);
281 I_u1u2(_divu)
282 I_u2u1u3(_dsll)
283 I_u2u1u3(_dsll32)
284 I_u2u1u3(_dsra)
285 I_u2u1u3(_dsrl)
286 I_u2u1u3(_dsrl32)
287 I_u2u1u3(_drotr)
288 I_u2u1u3(_drotr32)
289 I_u3u1u2(_dsubu)
290 I_0(_eret)
291 I_u2u1msbdu3(_ext)
292 I_u2u1msbu3(_ins)
293 I_u1(_j)
294 I_u1(_jal)
295 I_u2u1(_jalr)
296 I_u1(_jr)
297 I_u2s3u1(_lb)
298 I_u2s3u1(_ld)
299 I_u2s3u1(_lh)
300 I_u2s3u1(_ll)
301 I_u2s3u1(_lld)
302 I_u1s2(_lui)
303 I_u2s3u1(_lw)
304 I_u1u2u3(_mfc0)
305 I_u1u2u3(_mfhc0)
306 I_u1(_mfhi)
307 I_u1(_mflo)
308 I_u1u2u3(_mtc0)
309 I_u1u2u3(_mthc0)
310 I_u1(_mthi)
311 I_u1(_mtlo)
312 I_u3u1u2(_mul)
313 I_u2u1u3(_ori)
314 I_u3u1u2(_or)
315 I_0(_rfe)
316 I_u2s3u1(_sc)
317 I_u2s3u1(_scd)
318 I_u2s3u1(_sd)
319 I_u2u1u3(_sll)
320 I_u3u2u1(_sllv)
321 I_s3s1s2(_slt)
322 I_u2u1s3(_sltiu)
323 I_u3u1u2(_sltu)
324 I_u2u1u3(_sra)
325 I_u2u1u3(_srl)
326 I_u3u2u1(_srlv)
327 I_u2u1u3(_rotr)
328 I_u3u1u2(_subu)
329 I_u2s3u1(_sw)
330 I_u1(_sync)
331 I_0(_tlbp)
332 I_0(_tlbr)
333 I_0(_tlbwi)
334 I_0(_tlbwr)
335 I_u1(_wait);
336 I_u2u1(_wsbh)
337 I_u3u1u2(_xor)
338 I_u2u1u3(_xori)
339 I_u2u1(_yield)
340 I_u2u1msbu3(_dins);
341 I_u2u1msb32u3(_dinsm);
342 I_u1(_syscall);
343 I_u1u2s3(_bbit0);
344 I_u1u2s3(_bbit1);
345 I_u3u1u2(_lwx)
346 I_u3u1u2(_ldx)
347 I_u1u2(_ldpte)
348 I_u2u1u3(_lddir)
349
350 #ifdef CONFIG_CPU_CAVIUM_OCTEON
351 #include <asm/octeon/octeon.h>
352 void ISAFUNC(uasm_i_pref)(u32 **buf, unsigned int a, signed int b,
353 unsigned int c)
354 {
355 if (CAVIUM_OCTEON_DCACHE_PREFETCH_WAR && a <= 24 && a != 5)
356 /*
357 * As per erratum Core-14449, replace prefetches 0-4,
358 * 6-24 with 'pref 28'.
359 */
360 build_insn(buf, insn_pref, c, 28, b);
361 else
362 build_insn(buf, insn_pref, c, a, b);
363 }
364 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_i_pref));
365 #else
366 I_u2s3u1(_pref)
367 #endif
368
369 /* Handle labels. */
370 void ISAFUNC(uasm_build_label)(struct uasm_label **lab, u32 *addr, int lid)
371 {
372 (*lab)->addr = addr;
373 (*lab)->lab = lid;
374 (*lab)++;
375 }
376 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_build_label));
377
378 int ISAFUNC(uasm_in_compat_space_p)(long addr)
379 {
380 /* Is this address in 32bit compat space? */
381 return addr == (int)addr;
382 }
383 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_in_compat_space_p));
384
385 static int uasm_rel_highest(long val)
386 {
387 #ifdef CONFIG_64BIT
388 return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
389 #else
390 return 0;
391 #endif
392 }
393
394 static int uasm_rel_higher(long val)
395 {
396 #ifdef CONFIG_64BIT
397 return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
398 #else
399 return 0;
400 #endif
401 }
402
403 int ISAFUNC(uasm_rel_hi)(long val)
404 {
405 return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
406 }
407 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_hi));
408
409 int ISAFUNC(uasm_rel_lo)(long val)
410 {
411 return ((val & 0xffff) ^ 0x8000) - 0x8000;
412 }
413 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_lo));
414
415 void ISAFUNC(UASM_i_LA_mostly)(u32 **buf, unsigned int rs, long addr)
416 {
417 if (!ISAFUNC(uasm_in_compat_space_p)(addr)) {
418 ISAFUNC(uasm_i_lui)(buf, rs, uasm_rel_highest(addr));
419 if (uasm_rel_higher(addr))
420 ISAFUNC(uasm_i_daddiu)(buf, rs, rs, uasm_rel_higher(addr));
421 if (ISAFUNC(uasm_rel_hi(addr))) {
422 ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
423 ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
424 ISAFUNC(uasm_rel_hi)(addr));
425 ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
426 } else
427 ISAFUNC(uasm_i_dsll32)(buf, rs, rs, 0);
428 } else
429 ISAFUNC(uasm_i_lui)(buf, rs, ISAFUNC(uasm_rel_hi(addr)));
430 }
431 UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA_mostly));
432
433 void ISAFUNC(UASM_i_LA)(u32 **buf, unsigned int rs, long addr)
434 {
435 ISAFUNC(UASM_i_LA_mostly)(buf, rs, addr);
436 if (ISAFUNC(uasm_rel_lo(addr))) {
437 if (!ISAFUNC(uasm_in_compat_space_p)(addr))
438 ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
439 ISAFUNC(uasm_rel_lo(addr)));
440 else
441 ISAFUNC(uasm_i_addiu)(buf, rs, rs,
442 ISAFUNC(uasm_rel_lo(addr)));
443 }
444 }
445 UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA));
446
447 /* Handle relocations. */
448 void ISAFUNC(uasm_r_mips_pc16)(struct uasm_reloc **rel, u32 *addr, int lid)
449 {
450 (*rel)->addr = addr;
451 (*rel)->type = R_MIPS_PC16;
452 (*rel)->lab = lid;
453 (*rel)++;
454 }
455 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_r_mips_pc16));
456
457 static inline void __resolve_relocs(struct uasm_reloc *rel,
458 struct uasm_label *lab);
459
460 void ISAFUNC(uasm_resolve_relocs)(struct uasm_reloc *rel,
461 struct uasm_label *lab)
462 {
463 struct uasm_label *l;
464
465 for (; rel->lab != UASM_LABEL_INVALID; rel++)
466 for (l = lab; l->lab != UASM_LABEL_INVALID; l++)
467 if (rel->lab == l->lab)
468 __resolve_relocs(rel, l);
469 }
470 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_resolve_relocs));
471
472 void ISAFUNC(uasm_move_relocs)(struct uasm_reloc *rel, u32 *first, u32 *end,
473 long off)
474 {
475 for (; rel->lab != UASM_LABEL_INVALID; rel++)
476 if (rel->addr >= first && rel->addr < end)
477 rel->addr += off;
478 }
479 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_move_relocs));
480
481 void ISAFUNC(uasm_move_labels)(struct uasm_label *lab, u32 *first, u32 *end,
482 long off)
483 {
484 for (; lab->lab != UASM_LABEL_INVALID; lab++)
485 if (lab->addr >= first && lab->addr < end)
486 lab->addr += off;
487 }
488 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_move_labels));
489
490 void ISAFUNC(uasm_copy_handler)(struct uasm_reloc *rel, struct uasm_label *lab,
491 u32 *first, u32 *end, u32 *target)
492 {
493 long off = (long)(target - first);
494
495 memcpy(target, first, (end - first) * sizeof(u32));
496
497 ISAFUNC(uasm_move_relocs(rel, first, end, off));
498 ISAFUNC(uasm_move_labels(lab, first, end, off));
499 }
500 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_copy_handler));
501
502 int ISAFUNC(uasm_insn_has_bdelay)(struct uasm_reloc *rel, u32 *addr)
503 {
504 for (; rel->lab != UASM_LABEL_INVALID; rel++) {
505 if (rel->addr == addr
506 && (rel->type == R_MIPS_PC16
507 || rel->type == R_MIPS_26))
508 return 1;
509 }
510
511 return 0;
512 }
513 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_insn_has_bdelay));
514
515 /* Convenience functions for labeled branches. */
516 void ISAFUNC(uasm_il_bltz)(u32 **p, struct uasm_reloc **r, unsigned int reg,
517 int lid)
518 {
519 uasm_r_mips_pc16(r, *p, lid);
520 ISAFUNC(uasm_i_bltz)(p, reg, 0);
521 }
522 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bltz));
523
524 void ISAFUNC(uasm_il_b)(u32 **p, struct uasm_reloc **r, int lid)
525 {
526 uasm_r_mips_pc16(r, *p, lid);
527 ISAFUNC(uasm_i_b)(p, 0);
528 }
529 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_b));
530
531 void ISAFUNC(uasm_il_beq)(u32 **p, struct uasm_reloc **r, unsigned int r1,
532 unsigned int r2, int lid)
533 {
534 uasm_r_mips_pc16(r, *p, lid);
535 ISAFUNC(uasm_i_beq)(p, r1, r2, 0);
536 }
537 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beq));
538
539 void ISAFUNC(uasm_il_beqz)(u32 **p, struct uasm_reloc **r, unsigned int reg,
540 int lid)
541 {
542 uasm_r_mips_pc16(r, *p, lid);
543 ISAFUNC(uasm_i_beqz)(p, reg, 0);
544 }
545 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqz));
546
547 void ISAFUNC(uasm_il_beqzl)(u32 **p, struct uasm_reloc **r, unsigned int reg,
548 int lid)
549 {
550 uasm_r_mips_pc16(r, *p, lid);
551 ISAFUNC(uasm_i_beqzl)(p, reg, 0);
552 }
553 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqzl));
554
555 void ISAFUNC(uasm_il_bne)(u32 **p, struct uasm_reloc **r, unsigned int reg1,
556 unsigned int reg2, int lid)
557 {
558 uasm_r_mips_pc16(r, *p, lid);
559 ISAFUNC(uasm_i_bne)(p, reg1, reg2, 0);
560 }
561 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bne));
562
563 void ISAFUNC(uasm_il_bnez)(u32 **p, struct uasm_reloc **r, unsigned int reg,
564 int lid)
565 {
566 uasm_r_mips_pc16(r, *p, lid);
567 ISAFUNC(uasm_i_bnez)(p, reg, 0);
568 }
569 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bnez));
570
571 void ISAFUNC(uasm_il_bgezl)(u32 **p, struct uasm_reloc **r, unsigned int reg,
572 int lid)
573 {
574 uasm_r_mips_pc16(r, *p, lid);
575 ISAFUNC(uasm_i_bgezl)(p, reg, 0);
576 }
577 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgezl));
578
579 void ISAFUNC(uasm_il_bgez)(u32 **p, struct uasm_reloc **r, unsigned int reg,
580 int lid)
581 {
582 uasm_r_mips_pc16(r, *p, lid);
583 ISAFUNC(uasm_i_bgez)(p, reg, 0);
584 }
585 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgez));
586
587 void ISAFUNC(uasm_il_bbit0)(u32 **p, struct uasm_reloc **r, unsigned int reg,
588 unsigned int bit, int lid)
589 {
590 uasm_r_mips_pc16(r, *p, lid);
591 ISAFUNC(uasm_i_bbit0)(p, reg, bit, 0);
592 }
593 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit0));
594
595 void ISAFUNC(uasm_il_bbit1)(u32 **p, struct uasm_reloc **r, unsigned int reg,
596 unsigned int bit, int lid)
597 {
598 uasm_r_mips_pc16(r, *p, lid);
599 ISAFUNC(uasm_i_bbit1)(p, reg, bit, 0);
600 }
601 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit1));
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