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1c79356b A |
1 | /* |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_LICENSE_HEADER_START@ | |
5 | * | |
d7e50217 | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
1c79356b | 7 | * |
d7e50217 A |
8 | * This file contains Original Code and/or Modifications of Original Code |
9 | * as defined in and that are subject to the Apple Public Source License | |
10 | * Version 2.0 (the 'License'). You may not use this file except in | |
11 | * compliance with the License. Please obtain a copy of the License at | |
12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
13 | * file. | |
14 | * | |
15 | * The Original Code and all software distributed under the License are | |
16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
1c79356b A |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
d7e50217 A |
19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
20 | * Please see the License for the specific language governing rights and | |
21 | * limitations under the License. | |
1c79356b A |
22 | * |
23 | * @APPLE_LICENSE_HEADER_END@ | |
24 | */ | |
25 | /* | |
26 | Emulate.s | |
27 | ||
28 | Emulate instructions and traps. | |
29 | ||
30 | Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials. | |
31 | No animal products are used other than rendered otter bile and deep fried pork lard. | |
32 | ||
33 | */ | |
34 | ||
35 | #include <cpus.h> | |
36 | #include <ppc/asm.h> | |
37 | #include <ppc/proc_reg.h> | |
38 | #include <ppc/exception.h> | |
39 | #include <mach/machine/vm_param.h> | |
40 | #include <assym.s> | |
41 | ||
9bccf70c A |
42 | #define traceInst 30 |
43 | #define dssAllDone 29 | |
1c79356b A |
44 | |
45 | ; General stuff what happens here: | |
46 | ; 1) All general context saved, interrupts off, translation off | |
47 | ; 2) Vector and floating point disabled, but there may be live context. | |
48 | ; This code is responsible for saving and restoring what is used. This | |
49 | ; includes exception states, java mode, etc. | |
50 | ; 3) No attempt is made to resolve page faults. PTE misses are handled | |
51 | ; automatically, but actual faults (ala copyin/copyout) are not. If | |
52 | ; a fault does occur, the exception that caused entry to the emulation | |
53 | ; routine is remapped to either an instruction or data miss (depending | |
54 | ; upon the stage detected) and redrived through the exception handler. | |
55 | ; The only time that an instruction fault can happen is when a different | |
56 | ; processor removes a mapping between our original fault and when we | |
57 | ; fetch the assisted instruction. For an assisted instruction, data | |
58 | ; faults should not occur (except in the MP case). For a purely | |
59 | ; emulated instruction, faults can occur. | |
60 | ; | |
61 | ; | |
62 | ||
63 | ||
64 | .align 5 | |
65 | .globl EXT(Emulate) | |
66 | ||
67 | LEXT(Emulate) | |
68 | ||
d7e50217 A |
69 | bf-- pf64Bitb,emn64 ; Skip if not 64-bit |
70 | b EXT(Emulate64) ; Jump to the 64-bit code... | |
9bccf70c | 71 | |
d7e50217 A |
72 | emn64: mfsprg r31,0 ; Get the per_proc |
73 | lwz r12,savesrr1+4(r13) ; Get the exception info | |
9bccf70c | 74 | rlwinm. r0,r12,0,SRR1_PRG_ILL_INS_BIT,SRR1_PRG_ILL_INS_BIT ; Emulation candidate? |
d7e50217 | 75 | lwz r30,dgFlags(0) ; Get the flags |
9bccf70c A |
76 | beq+ eExit ; Nope, do not try to emulate... |
77 | ||
78 | rlwinm. r0,r30,0,enaDiagEMb,enaDiagEMb ; Do we want to try to emulate something? | |
79 | mfsprg r28,2 ; Get the processor features | |
80 | beq+ eExit ; No emulation allowed... | |
81 | ||
82 | rlwinm. r28,r28,0,pfAltivecb,pfAltivecb ; Do we have Altivec on this machine? | |
83 | beq eNoVect ; Nope, no Altivec... | |
84 | ||
85 | dssall ; We need to kill streams because we are going to flip to problem state | |
86 | sync | |
87 | ||
88 | eNoVect: bl eIFetch ; Get the instruction image | |
89 | bne- eRedriveAsISI ; Go redrive this as an ISI... | |
90 | ||
91 | rlwinm. r0,r10,0,0,5 ; See if we have the "special" op code here | |
92 | rlwinm r20,r10,16,22,31 ; Set rS/rD and rA | |
93 | bne+ eExit ; Not special op, ignore... | |
94 | ||
95 | rlwinm r0,r10,31,22,31 ; Extract the sub op code | |
96 | crclr cr1_eq ; Clear | |
97 | rlwimi r20,r10,14,15,16 ; Move bits 29 and 30 of instruction to 15 and 16 of DSISR | |
98 | cmplwi r0,790 ; lhbrx? | |
99 | rlwimi r20,r10,8,17,17 ; Move bit 25 to bit 17 | |
100 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
101 | cmplwi r0,534 ; lwbrx? | |
102 | rlwimi r20,r10,3,18,21 ; Move bit 21-24 to bit 18-21 | |
103 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
104 | cmplwi r0,918 ; sthbrx? | |
105 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
106 | cmplwi r0,662 ; stwbrx? | |
107 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
108 | cmplwi r0,1014 ; dcbz? | |
109 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
110 | cmplwi r0,533 ; lswx? | |
111 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
112 | cmplwi r0,661 ; stswx? | |
113 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
114 | bne cr1_eq,eNotIndex ; Go check non-index forms... | |
115 | ||
d7e50217 A |
116 | rlwinm. r21,r10,19,24,28 ; Extract index to rA to build EA |
117 | rlwinm r22,r10,24,24,28 ; Extract index to rB | |
118 | addi r24,r13,saver0+4 ; Point to the start of registers | |
9bccf70c A |
119 | li r19,0 ; Assume 0 base |
120 | beq eZeroBase ; Yes... | |
121 | lwzx r19,r24,r21 ; Get the base register value | |
122 | ||
123 | eZeroBase: lwzx r22,r24,r22 ; Get the index value | |
124 | add r22,r22,r19 ; Get DAR | |
125 | b eFinishUp ; Done, go finish up... | |
126 | ||
127 | eNotIndex: cmplwi r0,725 ; stswi? | |
128 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
129 | cmplwi r0,597 ; lswi? | |
130 | cror cr1_eq,cr1_eq,cr0_eq ; Remember | |
131 | bne cr1,eExit ; Not one we handle... | |
132 | ||
d7e50217 A |
133 | rlwinm. r21,r10,19,24,28 ; Extract index to rA to build EA |
134 | addi r24,r13,saver0+4 ; Point to the start of registers | |
9bccf70c A |
135 | li r22,0 ; Assume 0 base |
136 | beq eFinishUp ; Yes, it is... | |
137 | lwzx r22,r24,r21 ; Get the base register value | |
138 | ||
139 | eFinishUp: stw r20,savedsisr(r13) ; Set the DSISR | |
140 | li r11,T_ALIGNMENT ; Get the exception code | |
d7e50217 | 141 | stw r22,savedar+4(r13) ; Save the DAR |
9bccf70c A |
142 | stw r11,saveexception(r13) ; Set the exception code |
143 | b EXT(AlignAssist) ; Go emulate the handler... | |
144 | ||
145 | ||
146 | eExit: b EXT(EmulExit) ; Just return for now... | |
147 | ||
148 | ||
149 | ; | |
150 | ; Fetch the failing instruction. | |
151 | ; Image returned in R10 if CR0_EQ is false, otherwise, an ISI should be generated/ | |
152 | ; The cr bit kernAccess is set if this was a kernel access. | |
153 | ; R1 has the DSISR if access failed. | |
154 | ; | |
155 | ||
156 | .align 5 | |
157 | ||
d7e50217 | 158 | eIFetch: lwz r23,savesrr1+4(r13) ; Get old MSR |
9bccf70c A |
159 | mflr r28 ; Save return |
160 | ||
161 | rlwinm. r22,r23,0,MSR_PR_BIT,MSR_PR_BIT ; Within kernel? | |
162 | ||
163 | mfmsr r30 ; Save the MSR for now | |
d7e50217 | 164 | lwz r23,savesrr0+4(r13) ; Get instruction address |
9bccf70c | 165 | |
d7e50217 | 166 | ori r22,r30,lo16(MASK(MSR_DR)|MASK(MSR_RI)) ; Set RI and DR onto access MSR |
9bccf70c A |
167 | |
168 | crset cr0_eq ; Set this to see if we failed | |
169 | mtmsr r22 ; Flip DR, RI, and maybe PR on | |
170 | isync | |
171 | ||
172 | lwz r10,0(r23) ; Fetch the instruction | |
173 | ||
d7e50217 A |
174 | mtmsr r30 ; Trans and RI off |
175 | isync | |
9bccf70c A |
176 | |
177 | mtlr r28 ; Restore the LR | |
9bccf70c A |
178 | blr ; Return with instruction image in R10 |
179 | ||
180 | ||
181 | ; | |
182 | ; Redrive as an ISI | |
183 | ; | |
184 | ||
185 | eRedriveAsISI: | |
d7e50217 | 186 | lwz r6,savesrr1+4(r13) ; Get the srr1 value |
9bccf70c A |
187 | lwz r4,SAVflags(r13) ; Pick up the flags |
188 | li r11,T_INSTRUCTION_ACCESS ; Set failing instruction fetch code | |
189 | rlwimi r6,r1,0,0,4 ; Move the DSISR bits to the SRR1 | |
190 | oris r4,r4,hi16(SAVredrive) ; Set the redrive bit | |
191 | stw r11,saveexception(r13) ; Set the replacement code | |
192 | stw r4,SAVflags(r13) ; Set redrive request | |
d7e50217 | 193 | stw r6,savesrr1+4(r13) ; Set the srr1 value |
9bccf70c A |
194 | b EXT(EmulExit) ; Bail out to handle ISI... |
195 | ||
196 | ||
197 | ; | |
198 | ; This code emulates instructions that have failed because of operand | |
199 | ; alignment. We decode the DSISR to figure out what we need to do. | |
200 | ; | |
201 | ; DSISR: | |
202 | ; 0001FC00 - Instruction designation | |
203 | #define iFloat 12 | |
204 | #define iOptype1 15 | |
205 | #define iOptype2 16 | |
206 | #define iOptype3 18 | |
207 | #define iOptype4 19 | |
208 | #define iUpdate 17 | |
209 | #define iStore 20 | |
210 | #define iDouble 21 | |
211 | #define iNotify 22 | |
212 | ; 000003E0 - Target/Source register | |
213 | ; 0000001F - Register to update if update form | |
214 | ; | |
215 | ||
216 | .align 5 | |
217 | .globl EXT(AlignAssist) | |
218 | ||
219 | LEXT(AlignAssist) | |
d7e50217 A |
220 | bf-- pf64Bitb,aan64 ; Skip if not 64-bit |
221 | b EXT(AlignAssist64) ; Jump to the 64-bit code... | |
222 | ||
223 | aan64: lwz r20,savedsisr(r13) ; Get the DSISR | |
9bccf70c | 224 | mfsprg r31,0 ; Get the per_proc |
d7e50217 | 225 | mtcrf 0x10,r20 ; Put instruction ID in CR for later |
9bccf70c | 226 | lwz r21,spcFlags(r31) ; Grab the special flags |
d7e50217 | 227 | mtcrf 0x08,r20 ; Put instruction ID in CR for later |
9bccf70c | 228 | rlwinm. r0,r21,0,runningVMbit,runningVMbit ; Are we running a VM? |
d7e50217 A |
229 | mtcrf 0x04,r20 ; Put instruction ID in CR for later |
230 | lwz r22,savesrr1+4(r13) ; Get the SRR1 | |
9bccf70c | 231 | bne- aaPassAlong ; We are in a VM, no emulation for alignment exceptions... |
d7e50217 | 232 | lwz r19,dgFlags(0) ; Get the diagnostics flags |
9bccf70c A |
233 | crxor iFloat,iOptype1,iOptype2 ; Set this to 0 if both bits are either 0 or 1 |
234 | mr r26,r20 ; Save the DSISR | |
9bccf70c | 235 | rlwinm. r0,r22,0,MSR_SE_BIT,MSR_SE_BIT ; Were we single stepping? |
d7e50217 | 236 | lwz r23,savedar+4(r13) ; Pick up the address that we want to access |
9bccf70c | 237 | crnot traceInst,cr0_eq ; Remember if trace is on |
d7e50217 A |
238 | |
239 | rlwinm. r0,r19,0,enaNotifyEMb,enaNotifyEMb ; Should we notify that an alignment exception happened? | |
9bccf70c | 240 | mfmsr r30 ; Save the MSR for now |
d7e50217 | 241 | crnot iNotify,cr0_eq ; Remember to tell someone we did this |
9bccf70c A |
242 | li r29,emfp0 ; Point to work area |
243 | crxor iFloat,iFloat,iOptype3 ; Set true if we have a floating point instruction | |
9bccf70c | 244 | dcbz r29,r31 ; Clear and allocate a cache line for us to work in |
d7e50217 | 245 | rlwinm r24,r20,3,24,28 ; Get displacement to register to update if update form |
9bccf70c | 246 | rlwimi r20,r20,24,28,28 ; Move load/store indication to the bottom of index |
d7e50217 | 247 | ori r22,r30,lo16(MASK(MSR_DR)|MASK(MSR_RI)) ; Set RI onto access MSR |
9bccf70c | 248 | rlwimi r20,r20,26,27,27 ; Move single/double indication to just above the bottom |
d7e50217 | 249 | lis r29,hi16(EXT(aaFPopTable)) ; High part of FP branch table |
9bccf70c | 250 | bf- iFloat,aaNotFloat ; This is not a floating point instruction... |
d7e50217 | 251 | ori r29,r29,lo16(EXT(aaFPopTable)) ; Low part of FP branch table |
9bccf70c | 252 | |
d7e50217 | 253 | rlwimi r29,r20,0,22,28 ; Index into table based upon register||iDouble||iStore |
9bccf70c A |
254 | mtctr r29 ; Get set to call the function |
255 | bt iStore,aaFPstore ; This is an FP store... | |
256 | ||
257 | ; | |
258 | ; Here we handle floating point loads | |
259 | ; | |
260 | ||
d7e50217 A |
261 | aaFPload: crset cr0_eq ; Set this to see if we failed |
262 | mtmsr r22 ; Flip DR, RI | |
9bccf70c A |
263 | isync |
264 | ||
265 | lwz r10,0(r23) ; Get the first word | |
266 | bf- cr0_eq,aaLdNotDbl ; Jump out if we DSIed... | |
267 | bf iDouble,aaLdNotDbl ; this is not a double... | |
268 | lwz r11,4(r23) ; Get the second half | |
269 | ||
270 | aaLdNotDbl: mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
271 | |
272 | mtmsr r30 ; Turn off translation again | |
273 | isync | |
9bccf70c A |
274 | |
275 | bf- cr0_eq,aaRedriveAsDSI ; Go redrive this as a DSI... | |
276 | ||
277 | stw r10,emfp0(r31) ; Save the first half | |
278 | stw r11,emfp0+4(r31) ; Save the second half, just in case we need it | |
279 | ||
280 | bctrl ; Go set the target FP register | |
281 | ||
282 | b aaComExit ; All done, go exit... | |
283 | ||
284 | ; | |
285 | ; Here we handle floating point stores | |
286 | ; | |
287 | ||
288 | .align 5 | |
289 | ||
d7e50217 | 290 | aaFPstore: bctrl ; Go save the source FP register |
9bccf70c A |
291 | |
292 | lwz r10,emfp0(r31) ; Get first word | |
293 | crandc iDouble,iDouble,iOptype4 ; Change to 4-byte access if stfiwx | |
294 | lwz r11,emfp0+4(r31) ; and the second | |
295 | bf+ iOptype4,aaNotstfiwx ; This is not a stfiwx... | |
9bccf70c A |
296 | mr r10,r11 ; The stfiwx wants to store the second half |
297 | ||
298 | aaNotstfiwx: | |
9bccf70c | 299 | crset cr0_eq ; Set this to see if we failed |
d7e50217 | 300 | mtmsr r22 ; Flip DR, RI |
9bccf70c A |
301 | isync |
302 | ||
303 | stw r10,0(r23) ; Save the first word | |
304 | bf- cr0_eq,aaStNotDbl ; Jump out if we DSIed... | |
305 | bf iDouble,aaStNotDbl ; this is not a double... | |
306 | stw r11,4(r23) ; Save the second half | |
307 | ||
308 | aaStNotDbl: mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
309 | mtmsr r30 ; Turn off |
310 | isync | |
9bccf70c A |
311 | |
312 | bf- cr0_eq,aaRedriveAsDSI ; Go redrive this as a DSI... | |
9bccf70c A |
313 | |
314 | ; | |
315 | ; Common exit routines | |
316 | ; | |
317 | ||
d7e50217 | 318 | aaComExit: lwz r10,savesrr0+4(r13) ; Get the failing instruction address |
9bccf70c A |
319 | add r24,r24,r13 ; Offset to update register |
320 | li r11,T_IN_VAIN ; Assume we are all done | |
321 | addi r10,r10,4 ; Step to the next instruction | |
322 | bf iUpdate,aaComExNU ; Skip if not an update form... | |
d7e50217 | 323 | stw r23,saver0+4(r24) ; Update the target |
9bccf70c A |
324 | |
325 | aaComExNU: lwz r9,SAVflags(r13) ; Get the flags | |
d7e50217 | 326 | stw r10,savesrr0+4(r13) ; Set new PC |
9bccf70c A |
327 | bt- traceInst,aaComExitrd ; We are tracing, go emulate trace... |
328 | bf+ iNotify,aaComExGo ; Nothing special here, go... | |
9bccf70c A |
329 | |
330 | li r11,T_ALIGNMENT ; Set the we just did an alignment exception.... | |
331 | ||
332 | aaComExGo: b EXT(EmulExit) ; We are done, no tracing on... | |
333 | ||
334 | ||
335 | ; | |
336 | ; This is not a floating point operation | |
337 | ; | |
338 | ; The emulation routines for these are positioned every 64 bytes (16 instructions) | |
339 | ; in a 1024-byte aligned table. It is indexed by taking the low order 4 bits of | |
340 | ; the instruction code in the DSISR and subtracting 7. If this comes up negative, | |
341 | ; the instruction is not to be emulated. Then we add bit 0 of the code * 4. This | |
342 | ; gives us a fairly compact and almost unique index. Both lwm and stmw map to 0 so | |
343 | ; that one needs to be further reduced, and we end up with holes at index 6, 8, and 10. | |
344 | ; | |
345 | ; If the emulation routine takes more than 16 instructions, it must branch elsewhere | |
346 | ; to finish up. | |
347 | ; | |
348 | ||
349 | .align 5 | |
350 | ||
351 | aaNotFloat: | |
352 | lis r19,hi16(aaEmTable) ; Point to high part of table address | |
353 | rlwinm r3,r26,24,26,29 ; Isolate last 4 bits of op type * 4 | |
354 | rlwimi r19,r26,20,27,27 ; Get bit 0 of instruction code * 4 into bottom of table base | |
355 | addic. r3,r3,-28 ; Subtract 7*4 to adjust index | |
356 | ori r19,r19,lo16(aaEmTable) ; Low part of table address | |
357 | blt- aaPassAlong ; We do not handle any of these (lwarx, stwcx., eciwx, ecowx)... | |
358 | add r19,r19,r3 ; Point to emulation routine | |
d7e50217 | 359 | rlwinm r18,r26,30,24,28 ; Get the target/source register displacement |
9bccf70c A |
360 | |
361 | mtctr r19 ; Set the routine address | |
362 | ||
363 | bctr ; Go emulate the instruction... | |
364 | ||
365 | ; | |
366 | ; This is the table of non-floating point emulation routines. | |
367 | ; It is indexed by low 4 bits of DSISR op type - 7 + bit 0 of | |
368 | ; op type * 4 | |
369 | ; | |
370 | ||
371 | .align 5 | |
372 | ||
373 | aaEmTable: | |
374 | b aaLmwStmw ; This for lmw/stmw | |
375 | b aaLswx ; This for lwwx | |
376 | b aaLswi ; This for lswi | |
377 | b aaStswx ; This for stswx | |
378 | b aaStswi ; This for stswi | |
379 | b aaLwbrx ; This for lwbrx | |
380 | b aaPassAlong ; This an invalid index (6) | |
381 | b aaStwbrx ; This for stwbrx | |
382 | b aaPassAlong ; This an invalid index (8) | |
383 | b aaLhbrx ; This for lhbrx | |
384 | b aaPassAlong ; This an invalid index (A) | |
385 | b aaSthbrx ; This for sthbrx | |
386 | b aaDcbz ; This for dcbz | |
387 | b aaPassAlong ; This an invalid index (D) | |
388 | b aaPassAlong ; This an invalid index (E) | |
389 | b aaPassAlong ; This an invalid index (F) | |
390 | ||
391 | ||
392 | ; | |
393 | ; Here we handle the set up for the lmw and stmw. After that, we split off to the | |
394 | ; individual routines. | |
395 | ; | |
396 | ; Note also that after some set up, all of the string instructions come through here as well. | |
397 | ; | |
398 | .align 5 | |
399 | ||
400 | aaLmwStmw: | |
d7e50217 | 401 | rlwinm r17,r18,31,1,29 ; Convert doublword based index to words |
9bccf70c | 402 | li r28,0 ; Set no extra bytes to move (used for string instructions) |
d7e50217 | 403 | subfic r17,r17,32*4 ; Calculate the length of the transfer |
9bccf70c | 404 | |
d7e50217 | 405 | aaLSComm: addi r19,r13,saver0+4 ; Offset to registers in savearea |
9bccf70c | 406 | mr r16,r23 ; Make a hunk pointer |
9bccf70c A |
407 | |
408 | bt iUpdate,aaStmw ; This is the stmw... | |
409 | ||
410 | ; | |
411 | ; Load multiple word | |
412 | ; | |
413 | ||
414 | aaLmwNxt: cmplwi cr1,r17,8*4 ; Is there enough to move 8? | |
415 | blt- cr1,aaLmwNxtH ; Not enough for a full hunk... | |
416 | subi r17,r17,8*4 ; Back off for another hunk | |
417 | ||
418 | crset cr0_eq ; Set this to see if we failed | |
d7e50217 | 419 | mtmsr r22 ; Flip DR, RI |
9bccf70c A |
420 | isync |
421 | ||
422 | lwz r2,0(r16) ; Load word 0 | |
423 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
424 | lwz r15,4(r16) ; Load word 1 | |
425 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
426 | lwz r14,8(r16) ; Load word 2 | |
427 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
428 | lwz r5,12(r16) ; Load word 3 | |
429 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
430 | lwz r6,16(r16) ; Load word 4 | |
431 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
432 | lwz r7,20(r16) ; Load word 5 | |
433 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
434 | lwz r8,24(r16) ; Load word 6 | |
435 | bf- cr0_eq,aaLmwB1 ; Error, bail... | |
436 | lwz r9,28(r16) ; Load word 7 | |
437 | ||
438 | aaLmwB1: mr r4,r0 ; Remember DAR, jus in case we failed the access | |
d7e50217 A |
439 | mtmsr r30 ; Turn off DR, RI |
440 | isync | |
9bccf70c A |
441 | |
442 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
443 | ||
444 | addi r16,r16,8*4 ; Point up to next input aread | |
445 | ||
446 | stwx r2,r19,r18 ; Store register | |
d7e50217 A |
447 | addi r18,r18,8 ; Next register |
448 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 449 | stwx r15,r19,r18 ; Store register |
d7e50217 A |
450 | addi r18,r18,8 ; Next register |
451 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 452 | stwx r14,r19,r18 ; Store register |
d7e50217 A |
453 | addi r18,r18,8 ; Next register |
454 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 455 | stwx r5,r19,r18 ; Store register |
d7e50217 A |
456 | addi r18,r18,8 ; Next register |
457 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 458 | stwx r6,r19,r18 ; Store register |
d7e50217 A |
459 | addi r18,r18,8 ; Next register |
460 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 461 | stwx r7,r19,r18 ; Store register |
d7e50217 A |
462 | addi r18,r18,8 ; Next register |
463 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 464 | stwx r8,r19,r18 ; Store register |
d7e50217 A |
465 | addi r18,r18,8 ; Next register |
466 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 467 | stwx r9,r19,r18 ; Store register |
d7e50217 A |
468 | addi r18,r18,8 ; Next register |
469 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
470 | |
471 | b aaLmwNxt ; Do the next hunk... | |
472 | ||
473 | .align 5 | |
474 | ||
475 | aaLmwNxtH: cmplwi cr1,r17,4*4 ; Do we have 4 left? | |
476 | blt cr1,aaLmwL4 ; Nope... | |
477 | ||
478 | subi r17,r17,4*4 ; Set count properly | |
479 | ||
480 | crset cr0_eq ; Set this to see if we failed | |
481 | mtmsr r22 ; Flip DR, RI, and maybe PR on | |
482 | isync | |
483 | ||
484 | lwz r2,0(r16) ; Load word 0 | |
485 | bf- cr0_eq,aaLmwB2 ; Error, bail... | |
486 | lwz r15,4(r16) ; Load word 1 | |
487 | bf- cr0_eq,aaLmwB2 ; Error, bail... | |
488 | lwz r14,8(r16) ; Load word 2 | |
489 | bf- cr0_eq,aaLmwB2 ; Error, bail... | |
490 | lwz r5,12(r16) ; Load word 3 | |
491 | ||
492 | aaLmwB2: mr r4,r0 ; Remember DAR, jus in case we failed the access | |
d7e50217 A |
493 | mtmsr r30 ; Turn off DR, RI |
494 | isync | |
9bccf70c A |
495 | |
496 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
497 | ||
498 | addi r16,r16,4*4 ; Point up to next input aread | |
499 | ||
500 | stwx r2,r19,r18 ; Store register | |
d7e50217 A |
501 | addi r18,r18,8 ; Next register |
502 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 503 | stwx r15,r19,r18 ; Store register |
d7e50217 A |
504 | addi r18,r18,8 ; Next register |
505 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 506 | stwx r14,r19,r18 ; Store register |
d7e50217 A |
507 | addi r18,r18,8 ; Next register |
508 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 509 | stwx r5,r19,r18 ; Store register |
d7e50217 A |
510 | addi r18,r18,8 ; Next register |
511 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
512 | |
513 | aaLmwL4: or. r5,r17,r28 ; Do we have anything left? | |
514 | cmplwi cr1,r17,(2*4) ; Do we have one, two, or three full words left? | |
515 | cmplwi cr2,r17,0 ; Do we have no full words left? | |
516 | beq aaComExit ; Nothing left... | |
517 | ||
518 | crset cr0_eq ; Set this to see if we failed | |
519 | mtmsr r22 ; Flip DR, RI, and maybe PR on | |
520 | isync | |
521 | ||
522 | beq- cr2,aaLmwBy ; No full words, get bytes... | |
523 | ||
524 | lwz r2,0(r16) ; Pick up first word | |
525 | bf- cr0_eq,aaLmwDn ; Read failed, escape... | |
526 | addi r16,r16,4 ; Next input location | |
527 | blt cr1,aaLmwBy ; We only had one, we are done... | |
528 | ||
529 | lwz r15,0(r16) ; Pick up second word | |
530 | bf- cr0_eq,aaLmwDn ; Read failed, escape... | |
531 | addi r16,r16,4 ; Next input location | |
532 | beq cr1,aaLmwBy ; We had two, we are done... | |
533 | ||
534 | lwz r14,0(r16) ; Load word 3 | |
535 | addi r16,r16,4 ; Next input location | |
536 | ||
537 | aaLmwBy: cmplwi cr2,r28,0 ; Any trailing bytes to do? | |
538 | li r8,0 ; Clear second trailing byte | |
539 | cmplwi cr1,r28,2 ; Check for 1, 2, or 3 | |
540 | li r9,0 ; Clear third trailing byte | |
541 | beq+ cr2,aaLmwDn ; No trailing bytes... | |
542 | ||
543 | lbz r5,0(r16) ; Pick up first trailing byte | |
544 | bf- cr0_eq,aaLmwDn ; Read failed, escape... | |
545 | blt cr1,aaLmwDn ; We only had one, we are done... | |
546 | ||
547 | lbz r8,1(r16) ; Pick up second trailing byte | |
548 | bf- cr0_eq,aaLmwDn ; Read failed, escape... | |
549 | beq cr1,aaLmwDn ; We had two, we are done... | |
550 | ||
551 | lbz r9,2(r16) ; Get last trailing byte | |
552 | ||
553 | ||
554 | aaLmwDn: rlwinm r5,r5,24,0,7 ; Move first byte to top | |
555 | cmplwi cr2,r17,0 ; Any full words to do? | |
556 | mr r4,r0 ; Remember DAR, just in case we failed the access | |
557 | rlwimi r9,r8,8,16,23 ; Move second byte above third byte | |
558 | cmplwi cr1,r17,(2*4) ; Do we have one, two, or three full words left? | |
559 | mr r3,r30 ; Set the normal MSR | |
560 | rlwimi r5,r9,8,8,23 ; Move bytes 1 and 2 after 0 | |
d7e50217 A |
561 | |
562 | mtmsr r30 ; Turn off DR, RI | |
563 | isync | |
9bccf70c A |
564 | |
565 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
566 | ||
567 | beq- cr2,aaLmwCb ; No full words, copy bytes... | |
568 | ||
569 | stwx r2,r19,r18 ; Store register | |
d7e50217 A |
570 | addi r18,r18,8 ; Next register |
571 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
572 | blt cr1,aaLmwCb ; We only had one, we are done... |
573 | ||
574 | stwx r15,r19,r18 ; Store register | |
d7e50217 A |
575 | addi r18,r18,8 ; Next register |
576 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
577 | beq cr1,aaLmwCb ; We had two, we are done... |
578 | ||
579 | stwx r14,r19,r18 ; Store register | |
d7e50217 A |
580 | addi r18,r18,8 ; Next register |
581 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
582 | |
583 | aaLmwCb: mr. r28,r28 ; Any trailing bytes to do? | |
584 | beq+ aaComExit ; Nope, leave... | |
585 | ||
586 | stwx r5,r19,r18 ; Store register | |
587 | ||
588 | b aaComExit ; We are done.... | |
589 | ||
590 | ; | |
591 | ; Store multiple word | |
592 | ; | |
593 | ||
594 | .align 5 | |
595 | ||
596 | aaStmw: | |
597 | crclr iUpdate ; Make sure we do not think this is an update form | |
598 | ||
599 | aaStmwNxt: cmplwi cr1,r17,8*4 ; Is there enough to move 8? | |
600 | blt- cr1,aaStmwNxtH ; Not enough for a full hunk... | |
601 | subi r17,r17,8*4 ; Back off for another hunk | |
602 | ||
603 | lwzx r2,r19,r18 ; Store register | |
d7e50217 A |
604 | addi r18,r18,8 ; Next register |
605 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 606 | lwzx r15,r19,r18 ; Store register |
d7e50217 A |
607 | addi r18,r18,8 ; Next register |
608 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 609 | lwzx r14,r19,r18 ; Store register |
d7e50217 A |
610 | addi r18,r18,8 ; Next register |
611 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 612 | lwzx r5,r19,r18 ; Store register |
d7e50217 A |
613 | addi r18,r18,8 ; Next register |
614 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 615 | lwzx r6,r19,r18 ; Store register |
d7e50217 A |
616 | addi r18,r18,8 ; Next register |
617 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 618 | lwzx r7,r19,r18 ; Store register |
d7e50217 A |
619 | addi r18,r18,8 ; Next register |
620 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 621 | lwzx r8,r19,r18 ; Store register |
d7e50217 A |
622 | addi r18,r18,8 ; Next register |
623 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 624 | lwzx r9,r19,r18 ; Store register |
d7e50217 A |
625 | addi r18,r18,8 ; Next register |
626 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
627 | |
628 | crset cr0_eq ; Set this to see if we failed | |
629 | mtmsr r22 ; Flip DR, RI, and maybe PR on | |
630 | isync | |
631 | ||
632 | stw r2,0(r16) ; Store word 0 | |
633 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
634 | stw r15,4(r16) ; Store word 1 | |
635 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
636 | stw r14,8(r16) ; Store word 2 | |
637 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
638 | stw r5,12(r16) ; Store word 3 | |
639 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
640 | stw r6,16(r16) ; Store word 4 | |
641 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
642 | stw r7,20(r16) ; Store word 5 | |
643 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
644 | stw r8,24(r16) ; Store word 6 | |
645 | bf- cr0_eq,aaStmwB1 ; Error, bail... | |
646 | stw r9,28(r16) ; Store word 7 | |
647 | ||
648 | addi r16,r16,8*4 ; Point up to next output aread | |
649 | ||
650 | ||
651 | aaStmwB1: mr r4,r0 ; Remember DAR, jus in case we failed the access | |
d7e50217 A |
652 | mtmsr r30 ; Normal MSR |
653 | isync | |
9bccf70c A |
654 | |
655 | bt- cr0_eq,aaStmwNxt ; We have more to do and no failed access... | |
656 | b aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
657 | ||
658 | .align 5 | |
659 | ||
660 | aaStmwNxtH: cmplwi cr1,r17,(4*4) ; Do we have at least 4 left? | |
661 | blt cr1,aaStmwL4 ; Nope... | |
662 | subi r17,r17,4*4 ; Set count properly | |
663 | ||
664 | lwzx r2,r19,r18 ; Store register | |
d7e50217 A |
665 | addi r18,r18,8 ; Next register |
666 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 667 | lwzx r15,r19,r18 ; Store register |
d7e50217 A |
668 | addi r18,r18,8 ; Next register |
669 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 670 | lwzx r14,r19,r18 ; Store register |
d7e50217 A |
671 | addi r18,r18,8 ; Next register |
672 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c | 673 | lwzx r5,r19,r18 ; Store register |
d7e50217 A |
674 | addi r18,r18,8 ; Next register |
675 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
676 | |
677 | crset cr0_eq ; Set this to see if we failed | |
d7e50217 | 678 | mtmsr r22 ; Flip DR, RI |
9bccf70c A |
679 | isync |
680 | ||
681 | stw r2,0(r16) ; Store word 0 | |
682 | bf- cr0_eq,aaStmwB2 ; Error, bail... | |
683 | stw r15,4(r16) ; Store word 1 | |
684 | bf- cr0_eq,aaStmwB2 ; Error, bail... | |
685 | stw r14,8(r16) ; Store word 2 | |
686 | bf- cr0_eq,aaStmwB2 ; Error, bail... | |
687 | stw r5,12(r16) ; Store word 3 | |
688 | ||
689 | addi r16,r16,4*4 ; Point up to next input aread | |
690 | ||
691 | aaStmwB2: mr r4,r0 ; Remember DAR, jus in case we failed the access | |
d7e50217 A |
692 | mtmsr r30 ; Normal MSR |
693 | isync | |
9bccf70c A |
694 | |
695 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
696 | ||
697 | aaStmwL4: or. r5,r17,r28 ; Do we have anything left to do? | |
698 | cmplwi cr1,r17,(2*4) ; Do we have one, two, or three left? | |
699 | cmplwi cr2,r17,0 ; Do we have no full words left? | |
700 | beq aaComExit ; Nothing left... | |
701 | ||
702 | beq- cr2,aaStmwBy1 ; No full words, check out bytes | |
703 | ||
704 | lwzx r2,r19,r18 ; Store register | |
d7e50217 A |
705 | addi r18,r18,8 ; Next register |
706 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
707 | blt cr1,aaStmwBy1 ; We only had one, go save it... |
708 | ||
709 | lwzx r15,r19,r18 ; Store register | |
d7e50217 A |
710 | addi r18,r18,8 ; Next register |
711 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
712 | beq cr1,aaStmwBy1 ; We had two, go save it... |
713 | ||
714 | lwzx r14,r19,r18 ; Store register | |
d7e50217 A |
715 | addi r18,r18,8 ; Next register |
716 | rlwinm r18,r18,0,24,28 ; Wrap back to 0 if needed | |
9bccf70c A |
717 | |
718 | aaStmwBy1: mr. r28,r28 ; Do we have any trailing bytes? | |
719 | beq+ aaStmwSt ; Nope... | |
720 | ||
721 | lwzx r5,r19,r18 ; Yes, pick up one extra register | |
722 | ||
723 | aaStmwSt: crset cr0_eq ; Set this to see if we failed | |
d7e50217 | 724 | mtmsr r22 ; Flip DR, RI |
9bccf70c A |
725 | isync |
726 | ||
727 | beq- cr2,aaStmwBy2 ; No words, check trailing bytes... | |
728 | ||
729 | stw r2,0(r16) ; Save first word | |
d7e50217 | 730 | bf- cr0_eq,aaStmwDn ; Store failed, escape... |
9bccf70c A |
731 | addi r16,r16,4 ; Bump sink |
732 | blt cr1,aaStmwBy2 ; We only had one, we are done... | |
733 | ||
734 | stw r15,0(r16) ; Save second word | |
d7e50217 | 735 | bf- cr0_eq,aaStmwDn ; Store failed, escape... |
9bccf70c A |
736 | addi r16,r16,4 ; Bump sink |
737 | beq cr1,aaStmwBy2 ; We had two, we are done... | |
738 | ||
739 | stw r14,0(r16) ; Save third word | |
d7e50217 | 740 | bf- cr0_eq,aaStmwDn ; Store failed, escape... |
9bccf70c A |
741 | addi r16,r16,4 ; Bump sink |
742 | ||
743 | aaStmwBy2: rlwinm r2,r5,8,24,31 ; Get byte 0 | |
744 | cmplwi cr2,r28,0 ; Any trailing bytes to do? | |
745 | rlwinm r14,r5,24,24,31 ; Get byte 3 | |
746 | li r8,0 ; Clear second trailing byte | |
747 | cmplwi cr1,r28,2 ; Check for 1, 2, or 3 | |
748 | li r9,0 ; Clear third trailing byte | |
749 | beq+ cr2,aaStmwDn ; No trailing bytes... | |
750 | rlwinm r15,r5,16,24,31 ; Get byte 1 | |
751 | ||
752 | stb r2,0(r16) ; Save first byte | |
753 | bf- cr0_eq,aaStmwDn ; Read failed, escape... | |
754 | blt cr1,aaStmwDn ; We only had one, we are done... | |
755 | ||
756 | stb r15,1(r16) ; Save second byte | |
757 | bf- cr0_eq,aaStmwDn ; Read failed, escape... | |
758 | beq cr1,aaStmwDn ; We had two, we are done... | |
759 | ||
760 | stb r14,2(r16) ; Save third byte | |
761 | ||
762 | aaStmwDn: mr r4,r0 ; Remember DAR, jus in case we failed the access | |
d7e50217 A |
763 | mtmsr r30 ; Normal MSR |
764 | isync | |
9bccf70c A |
765 | |
766 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
767 | ||
768 | b aaComExit ; We are done.... | |
769 | ||
770 | ||
771 | ; | |
772 | ; Load String Indexed | |
773 | ; | |
774 | ||
775 | .align 5 | |
776 | ||
d7e50217 | 777 | aaLswx: lwz r17,savexer+4(r13) ; Pick up the XER |
9bccf70c A |
778 | crclr iUpdate ; Make sure we think this the load form |
779 | rlwinm. r25,r17,0,25,31 ; Get the number of bytes to load | |
780 | rlwinm r28,r17,0,30,31 ; Get the number of bytes past an even word | |
781 | beq- aaComExit ; Do nothing if 0 length... | |
782 | xor r17,r25,r28 ; Round down to an even word boundary | |
783 | b aaLSComm ; Join up with common load/store code... | |
784 | ||
785 | ||
786 | ; | |
787 | ; Load String Immediate | |
788 | ; | |
789 | ||
790 | .align 5 | |
791 | ||
792 | aaLswi: mr r9,r23 ; Save the DAR | |
793 | bl eIFetch ; Get the instruction image | |
794 | bne- eRedriveAsISI ; Go redrive this as an ISI... | |
795 | rlwinm r25,r10,21,27,31 ; Get the number of bytes to load | |
796 | crclr iUpdate ; Make sure we think this the load form | |
797 | subi r25,r25,1 ; Back off by 1 | |
798 | rlwinm r25,r25,0,27,31 ; Clear back down | |
799 | addi r25,r25,1 ; Add back the 1 to convert 0 to 32 | |
800 | rlwinm r28,r25,0,30,31 ; Get the number of bytes past an even word | |
801 | xor r17,r25,r28 ; Round down to an even word boundary | |
802 | mr r23,r9 ; Move back the DAR | |
803 | b aaLSComm ; Join up with common load/store code... | |
804 | ||
805 | ; | |
806 | ; Store String Indexed | |
807 | ; | |
808 | ||
809 | .align 5 | |
810 | ||
d7e50217 | 811 | aaStswx: lwz r17,savexer+4(r13) ; Pick up the XER |
9bccf70c A |
812 | crclr iUpdate ; Make sure this is clear in case we have 0 length |
813 | rlwinm. r25,r17,0,25,31 ; Get the number of bytes to load | |
814 | rlwinm r28,r17,0,30,31 ; Get the number of bytes past an even word | |
815 | beq- aaComExit ; Do nothing if 0 length... | |
816 | xor r17,r25,r28 ; Round down to an even word boundary | |
817 | crset iUpdate ; Make sure we think this the store form | |
818 | b aaLSComm ; Join up with common load/store code... | |
819 | ||
820 | ||
821 | ; | |
822 | ; Store String Immediate | |
823 | ; | |
824 | ||
825 | .align 5 | |
826 | ||
827 | aaStswi: mr r9,r23 ; Save the DAR | |
828 | bl eIFetch ; Get the instruction image | |
829 | bne- eRedriveAsISI ; Go redrive this as an ISI... | |
830 | rlwinm r25,r10,21,27,31 ; Get the number of bytes to load | |
831 | crclr iUpdate ; Make sure we think this the load form | |
832 | subi r25,r25,1 ; Back off by 1 | |
833 | rlwinm r25,r25,0,27,31 ; Clear back down | |
834 | addi r25,r25,1 ; Add back the 1 to convert 0 to 32 | |
835 | rlwinm r28,r25,21,30,31 ; Get the number of bytes past an even word | |
836 | xor r17,r25,r28 ; Round down to an even word boundary | |
837 | mr r23,r9 ; Move back the DAR | |
838 | b aaLSComm ; Join up with common load/store code... | |
839 | ||
840 | ||
841 | ; | |
842 | ; Load byte-reversed word | |
843 | ; | |
844 | ||
845 | .align 5 | |
846 | ||
847 | aaLwbrx: | |
848 | add r18,r18,r13 ; Index to source register | |
9bccf70c A |
849 | |
850 | crset cr0_eq ; Set this to see if we failed | |
9bccf70c A |
851 | mtmsr r22 ; Flip DR, RI, and maybe PR on |
852 | isync | |
853 | ||
854 | lwz r11,0(r23) ; Load the word | |
855 | ||
856 | mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
857 | mtmsr r30 ; Restore normal MSR |
858 | isync | |
859 | ||
9bccf70c A |
860 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... |
861 | ||
862 | rlwinm r10,r11,8,0,31 ; Get byte 0 to 3 and byte 2 to 1 | |
863 | rlwimi r10,r11,24,16,23 ; Move byte 1 to byte 2 | |
864 | rlwimi r10,r11,24,0,7 ; Move byte 3 to byte 0 | |
865 | ||
d7e50217 | 866 | stw r10,saver0+4(r18) ; Set the register |
9bccf70c A |
867 | |
868 | b aaComExit ; All done, go exit... | |
869 | ||
870 | ||
871 | ||
872 | ; | |
873 | ; Store byte-reversed word | |
874 | ; | |
875 | ||
876 | .align 5 | |
877 | ||
878 | aaStwbrx: | |
879 | add r18,r18,r13 ; Index to source register | |
d7e50217 | 880 | lwz r11,saver0+4(r18) ; Get the register to store |
9bccf70c A |
881 | |
882 | rlwinm r10,r11,8,0,31 ; Get byte 0 to 3 and byte 2 to 1 | |
883 | rlwimi r10,r11,24,16,23 ; Move byte 1 to byte 2 | |
884 | rlwimi r10,r11,24,0,7 ; Move byte 3 to byte 0 | |
885 | ||
9bccf70c | 886 | crset cr0_eq ; Set this to see if we failed |
9bccf70c A |
887 | mtmsr r22 ; Flip DR, RI, and maybe PR on |
888 | isync | |
889 | ||
890 | stw r10,0(r23) ; Store the reversed halfword | |
891 | ||
892 | mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
893 | mtmsr r30 ; Restore normal MSR |
894 | isync | |
895 | ||
9bccf70c A |
896 | bt+ cr0_eq,aaComExit ; All done, go exit... |
897 | b aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
898 | ||
899 | ||
900 | ||
901 | ; | |
902 | ; Load byte-reversed halfword | |
903 | ; | |
904 | ||
905 | .align 5 | |
906 | ||
907 | aaLhbrx: | |
908 | add r18,r18,r13 ; Index to source register | |
9bccf70c A |
909 | |
910 | crset cr0_eq ; Set this to see if we failed | |
9bccf70c A |
911 | mtmsr r22 ; Flip DR, RI, and maybe PR on |
912 | isync | |
913 | ||
914 | lhz r11,0(r23) ; Load the halfword | |
915 | ||
916 | mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
917 | mtmsr r30 ; Restore normal MSR |
918 | isync | |
9bccf70c A |
919 | |
920 | bf- cr0_eq,aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
921 | ||
922 | rlwinm r10,r11,8,16,23 ; Rotate bottom byte up one and clear everything else | |
923 | rlwimi r10,r11,24,24,31 ; Put old second from bottom into bottom | |
924 | ||
d7e50217 | 925 | stw r10,saver0+4(r18) ; Set the register |
9bccf70c A |
926 | |
927 | b aaComExit ; All done, go exit... | |
928 | ||
929 | ||
930 | ; | |
931 | ; Store byte-reversed halfword | |
932 | ; | |
933 | ||
934 | .align 5 | |
935 | ||
936 | aaSthbrx: | |
937 | add r18,r18,r13 ; Index to source register | |
d7e50217 | 938 | lwz r10,saver0+4(r18) ; Get the register to store |
9bccf70c A |
939 | rlwinm r10,r10,8,0,31 ; Rotate bottom byte up one |
940 | rlwimi r10,r10,16,24,31 ; Put old second from bottom into bottom | |
941 | ||
9bccf70c | 942 | crset cr0_eq ; Set this to see if we failed |
9bccf70c A |
943 | mtmsr r22 ; Flip DR, RI, and maybe PR on |
944 | isync | |
945 | ||
946 | sth r10,0(r23) ; Store the reversed halfword | |
947 | ||
948 | mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
949 | mtmsr r30 ; Restore normal MSR |
950 | isync | |
9bccf70c A |
951 | |
952 | bt+ cr0_eq,aaComExit ; All done, go exit... | |
953 | b aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
954 | ||
955 | ; | |
956 | ; Data cache block zero | |
957 | ; | |
958 | ||
959 | .align 5 | |
960 | ||
961 | aaDcbz: | |
9bccf70c A |
962 | rlwinm r23,r23,0,0,26 ; Round back to a 32-byte boundary |
963 | ||
9bccf70c | 964 | crset cr0_eq ; Set this to see if we failed |
9bccf70c A |
965 | li r0,0 ; Clear this out |
966 | mtmsr r22 ; Flip DR, RI, and maybe PR on | |
967 | isync | |
968 | ||
969 | stw r0,0(r23) ; Clear word | |
970 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
971 | stw r0,4(r23) ; Clear word | |
972 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
973 | stw r0,8(r23) ; Clear word | |
974 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
975 | stw r0,12(r23) ; Clear word | |
976 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
977 | stw r0,16(r23) ; Clear word | |
978 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
979 | stw r0,20(r23) ; Clear word | |
980 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
981 | stw r0,24(r23) ; Clear word | |
982 | bne- aaDcbzXit ; Got DSI, we are stopping... | |
983 | stw r0,28(r23) ; Clear word | |
984 | ||
985 | aaDcbzXit: mr r4,r0 ; Save the DAR if we failed the access | |
d7e50217 A |
986 | mtmsr r30 ; Restore normal MSR |
987 | isync | |
9bccf70c A |
988 | |
989 | crclr iUpdate ; Make sure we do not think this is an update form | |
990 | ||
991 | bt+ cr0_eq,aaComExit ; All done, go exit... | |
992 | b aaRedriveAsDSI ; We failed, go redrive this as a DSI... | |
993 | ||
994 | ||
995 | ; | |
996 | ; Unhandled alignment exception, pass it along | |
997 | ; | |
998 | ||
9bccf70c A |
999 | aaPassAlong: |
1000 | b EXT(EmulExit) | |
1001 | ||
1002 | ||
1003 | ||
1004 | ||
1005 | ; | |
1006 | ; We go here to emulate a trace exception after we have handled alignment error | |
1007 | ; | |
1008 | ||
1009 | .align 5 | |
1010 | ||
1011 | aaComExitrd: | |
9bccf70c A |
1012 | oris r9,r9,hi16(SAVredrive) ; Set the redrive bit |
1013 | li r11,T_TRACE ; Set trace interrupt | |
1014 | rlwinm r12,r12,0,16,31 ; Clear top half of SRR1 | |
1015 | stw r9,SAVflags(r13) ; Set the flags | |
1016 | stw r11,saveexception(r13) ; Set the exception code | |
1017 | b EXT(EmulExit) ; Exit and do trace interrupt... | |
1018 | ||
1019 | ||
1020 | ||
1021 | ; | |
1022 | ; Redrive as a DSI | |
1023 | ||
1024 | aaRedriveAsDSI: | |
1025 | mr r20,r1 ; Save the DSISR | |
1026 | mr r21,r4 | |
9bccf70c A |
1027 | lwz r4,SAVflags(r13) ; Pick up the flags |
1028 | li r11,T_DATA_ACCESS ; Set failing data access code | |
1029 | oris r4,r4,hi16(SAVredrive) ; Set the redrive bit | |
1030 | stw r20,savedsisr(r13) ; Set the DSISR of failed access | |
d7e50217 | 1031 | stw r21,savedar+4(r13) ; Set the address of the failed access |
9bccf70c A |
1032 | stw r11,saveexception(r13) ; Set the replacement code |
1033 | stw r4,SAVflags(r13) ; Set redrive request | |
1034 | b EXT(EmulExit) ; Bail out to handle ISI... | |
1035 | ||
9bccf70c A |
1036 | |
1037 | ||
1038 | ; | |
1039 | ; Table of functions to load or store floating point registers | |
1040 | ; This table is indexed reg||size||dir. That means that each | |
1041 | ; like load/store pair (e.g., lfd f31/stfd f31) are within the same | |
1042 | ; quadword, which is the current ifetch size. We expect most of the | |
1043 | ; unaligned accesses to be part of copies, therefore, with this | |
1044 | ; organization, we will save the ifetch of the store after the load. | |
1045 | ; | |
1046 | ||
1047 | .align 10 ; Make sure we are on a 1k boundary | |
d7e50217 | 1048 | .globl EXT(aaFPopTable) |
9bccf70c | 1049 | |
d7e50217 | 1050 | LEXT(aaFPopTable) |
9bccf70c A |
1051 | lfs f0,emfp0(r31) ; Load single variant |
1052 | blr | |
1053 | ||
1054 | stfs f0,emfp0(r31) ; Store single variant | |
1055 | blr | |
1056 | ||
1057 | lfd f0,emfp0(r31) ; Load double variant | |
1058 | blr | |
1059 | ||
1060 | stfd f0,emfp0(r31) ; Store double variant | |
1061 | blr | |
1062 | ||
1063 | lfs f1,emfp0(r31) ; Load single variant | |
1064 | blr | |
1065 | ||
1066 | stfs f1,emfp0(r31) ; Store single variant | |
1067 | blr | |
1068 | ||
1069 | lfd f1,emfp0(r31) ; Load double variant | |
1070 | blr | |
1071 | ||
1072 | stfd f1,emfp0(r31) ; Store double variant | |
1073 | blr | |
1074 | ||
1075 | lfs f2,emfp0(r31) ; Load single variant | |
1076 | blr | |
1077 | ||
1078 | stfs f2,emfp0(r31) ; Store single variant | |
1079 | blr | |
1080 | ||
1081 | lfd f2,emfp0(r31) ; Load double variant | |
1082 | blr | |
1083 | ||
1084 | stfd f2,emfp0(r31) ; Store double variant | |
1085 | blr | |
1086 | ||
1087 | lfs f3,emfp0(r31) ; Load single variant | |
1088 | blr | |
1089 | ||
1090 | stfs f3,emfp0(r31) ; Store single variant | |
1091 | blr | |
1092 | ||
1093 | lfd f3,emfp0(r31) ; Load double variant | |
1094 | blr | |
1095 | ||
1096 | stfd f3,emfp0(r31) ; Store double variant | |
1097 | blr | |
1098 | ||
1099 | lfs f4,emfp0(r31) ; Load single variant | |
1100 | blr | |
1101 | ||
1102 | stfs f4,emfp0(r31) ; Store single variant | |
1103 | blr | |
1104 | ||
1105 | lfd f4,emfp0(r31) ; Load double variant | |
1106 | blr | |
1107 | ||
1108 | stfd f4,emfp0(r31) ; Store double variant | |
1109 | blr | |
1110 | ||
1111 | lfs f5,emfp0(r31) ; Load single variant | |
1112 | blr | |
1113 | ||
1114 | stfs f5,emfp0(r31) ; Store single variant | |
1115 | blr | |
1116 | ||
1117 | lfd f5,emfp0(r31) ; Load double variant | |
1118 | blr | |
1119 | ||
1120 | stfd f5,emfp0(r31) ; Store double variant | |
1121 | blr | |
1122 | ||
1123 | lfs f6,emfp0(r31) ; Load single variant | |
1124 | blr | |
1125 | ||
1126 | stfs f6,emfp0(r31) ; Store single variant | |
1127 | blr | |
1128 | ||
1129 | lfd f6,emfp0(r31) ; Load double variant | |
1130 | blr | |
1131 | ||
1132 | stfd f6,emfp0(r31) ; Store double variant | |
1133 | blr | |
1134 | ||
1135 | lfs f7,emfp0(r31) ; Load single variant | |
1136 | blr | |
1137 | ||
1138 | stfs f7,emfp0(r31) ; Store single variant | |
1139 | blr | |
1140 | ||
1141 | lfd f7,emfp0(r31) ; Load double variant | |
1142 | blr | |
1143 | ||
1144 | stfd f7,emfp0(r31) ; Store double variant | |
1145 | blr | |
1146 | ||
1147 | lfs f8,emfp0(r31) ; Load single variant | |
1148 | blr | |
1149 | ||
1150 | stfs f8,emfp0(r31) ; Store single variant | |
1151 | blr | |
1152 | ||
1153 | lfd f8,emfp0(r31) ; Load double variant | |
1154 | blr | |
1155 | ||
1156 | stfd f8,emfp0(r31) ; Store double variant | |
1157 | blr | |
1158 | ||
1159 | lfs f9,emfp0(r31) ; Load single variant | |
1160 | blr | |
1161 | ||
1162 | stfs f9,emfp0(r31) ; Store single variant | |
1163 | blr | |
1164 | ||
1165 | lfd f9,emfp0(r31) ; Load double variant | |
1166 | blr | |
1167 | ||
1168 | stfd f9,emfp0(r31) ; Store double variant | |
1169 | blr | |
1170 | ||
1171 | lfs f10,emfp0(r31) ; Load single variant | |
1172 | blr | |
1173 | ||
1174 | stfs f10,emfp0(r31) ; Store single variant | |
1175 | blr | |
1176 | ||
1177 | lfd f10,emfp0(r31) ; Load double variant | |
1178 | blr | |
1179 | ||
1180 | stfd f10,emfp0(r31) ; Store double variant | |
1181 | blr | |
1182 | ||
1183 | lfs f11,emfp0(r31) ; Load single variant | |
1184 | blr | |
1185 | ||
1186 | stfs f11,emfp0(r31) ; Store single variant | |
1187 | blr | |
1188 | ||
1189 | lfd f11,emfp0(r31) ; Load double variant | |
1190 | blr | |
1191 | ||
1192 | stfd f11,emfp0(r31) ; Store double variant | |
1193 | blr | |
1194 | ||
1195 | lfs f12,emfp0(r31) ; Load single variant | |
1196 | blr | |
1197 | ||
1198 | stfs f12,emfp0(r31) ; Store single variant | |
1199 | blr | |
1200 | ||
1201 | lfd f12,emfp0(r31) ; Load double variant | |
1202 | blr | |
1203 | ||
1204 | stfd f12,emfp0(r31) ; Store double variant | |
1205 | blr | |
1206 | ||
1207 | lfs f13,emfp0(r31) ; Load single variant | |
1208 | blr | |
1209 | ||
1210 | stfs f13,emfp0(r31) ; Store single variant | |
1211 | blr | |
1212 | ||
1213 | lfd f13,emfp0(r31) ; Load double variant | |
1214 | blr | |
1215 | ||
1216 | stfd f13,emfp0(r31) ; Store double variant | |
1217 | blr | |
1218 | ||
1219 | lfs f14,emfp0(r31) ; Load single variant | |
1220 | blr | |
1221 | ||
1222 | stfs f14,emfp0(r31) ; Store single variant | |
1223 | blr | |
1224 | ||
1225 | lfd f14,emfp0(r31) ; Load double variant | |
1226 | blr | |
1227 | ||
1228 | stfd f14,emfp0(r31) ; Store double variant | |
1229 | blr | |
1230 | ||
1231 | lfs f15,emfp0(r31) ; Load single variant | |
1232 | blr | |
1233 | ||
1234 | stfs f15,emfp0(r31) ; Store single variant | |
1235 | blr | |
1236 | ||
1237 | lfd f15,emfp0(r31) ; Load double variant | |
1238 | blr | |
1239 | ||
1240 | stfd f15,emfp0(r31) ; Store double variant | |
1241 | blr | |
1242 | ||
1243 | lfs f16,emfp0(r31) ; Load single variant | |
1244 | blr | |
1245 | ||
1246 | stfs f16,emfp0(r31) ; Store single variant | |
1247 | blr | |
1248 | ||
1249 | lfd f16,emfp0(r31) ; Load double variant | |
1250 | blr | |
1251 | ||
1252 | stfd f16,emfp0(r31) ; Store double variant | |
1253 | blr | |
1254 | ||
1255 | lfs f17,emfp0(r31) ; Load single variant | |
1256 | blr | |
1257 | ||
1258 | stfs f17,emfp0(r31) ; Store single variant | |
1259 | blr | |
1260 | ||
1261 | lfd f17,emfp0(r31) ; Load double variant | |
1262 | blr | |
1263 | ||
1264 | stfd f17,emfp0(r31) ; Store double variant | |
1265 | blr | |
1266 | ||
1267 | lfs f18,emfp0(r31) ; Load single variant | |
1268 | blr | |
1269 | ||
1270 | stfs f18,emfp0(r31) ; Store single variant | |
1271 | blr | |
1272 | ||
1273 | lfd f18,emfp0(r31) ; Load double variant | |
1274 | blr | |
1275 | ||
1276 | stfd f18,emfp0(r31) ; Store double variant | |
1277 | blr | |
1278 | ||
1279 | lfs f19,emfp0(r31) ; Load single variant | |
1280 | blr | |
1281 | ||
1282 | stfs f19,emfp0(r31) ; Store single variant | |
1283 | blr | |
1284 | ||
1285 | lfd f19,emfp0(r31) ; Load double variant | |
1286 | blr | |
1287 | ||
1288 | stfd f19,emfp0(r31) ; Store double variant | |
1289 | blr | |
1290 | ||
1291 | lfs f20,emfp0(r31) ; Load single variant | |
1292 | blr | |
1293 | ||
1294 | stfs f20,emfp0(r31) ; Store single variant | |
1295 | blr | |
1296 | ||
1297 | lfd f20,emfp0(r31) ; Load double variant | |
1298 | blr | |
1299 | ||
1300 | stfd f20,emfp0(r31) ; Store double variant | |
1301 | blr | |
1302 | ||
1303 | lfs f21,emfp0(r31) ; Load single variant | |
1304 | blr | |
1305 | ||
1306 | stfs f21,emfp0(r31) ; Store single variant | |
1307 | blr | |
1308 | ||
1309 | lfd f21,emfp0(r31) ; Load double variant | |
1310 | blr | |
1311 | ||
1312 | stfd f21,emfp0(r31) ; Store double variant | |
1313 | blr | |
1314 | ||
1315 | lfs f22,emfp0(r31) ; Load single variant | |
1316 | blr | |
1317 | ||
1318 | stfs f22,emfp0(r31) ; Store single variant | |
1319 | blr | |
1320 | ||
1321 | lfd f22,emfp0(r31) ; Load double variant | |
1322 | blr | |
1323 | ||
1324 | stfd f22,emfp0(r31) ; Store double variant | |
1325 | blr | |
1326 | ||
1327 | lfs f23,emfp0(r31) ; Load single variant | |
1328 | blr | |
1329 | ||
1330 | stfs f23,emfp0(r31) ; Store single variant | |
1331 | blr | |
1332 | ||
1333 | lfd f23,emfp0(r31) ; Load double variant | |
1334 | blr | |
1335 | ||
1336 | stfd f23,emfp0(r31) ; Store double variant | |
1337 | blr | |
1338 | ||
1339 | lfs f24,emfp0(r31) ; Load single variant | |
1340 | blr | |
1341 | ||
1342 | stfs f24,emfp0(r31) ; Store single variant | |
1343 | blr | |
1344 | ||
1345 | lfd f24,emfp0(r31) ; Load double variant | |
1346 | blr | |
1347 | ||
1348 | stfd f24,emfp0(r31) ; Store double variant | |
1349 | blr | |
1350 | ||
1351 | lfs f25,emfp0(r31) ; Load single variant | |
1352 | blr | |
1353 | ||
1354 | stfs f25,emfp0(r31) ; Store single variant | |
1355 | blr | |
1356 | ||
1357 | lfd f25,emfp0(r31) ; Load double variant | |
1358 | blr | |
1359 | ||
1360 | stfd f25,emfp0(r31) ; Store double variant | |
1361 | blr | |
1362 | ||
1363 | lfs f26,emfp0(r31) ; Load single variant | |
1364 | blr | |
1365 | ||
1366 | stfs f26,emfp0(r31) ; Store single variant | |
1367 | blr | |
1368 | ||
1369 | lfd f26,emfp0(r31) ; Load double variant | |
1370 | blr | |
1371 | ||
1372 | stfd f26,emfp0(r31) ; Store double variant | |
1373 | blr | |
1374 | ||
1375 | lfs f27,emfp0(r31) ; Load single variant | |
1376 | blr | |
1377 | ||
1378 | stfs f27,emfp0(r31) ; Store single variant | |
1379 | blr | |
1380 | ||
1381 | lfd f27,emfp0(r31) ; Load double variant | |
1382 | blr | |
1383 | ||
1384 | stfd f27,emfp0(r31) ; Store double variant | |
1385 | blr | |
1386 | ||
1387 | lfs f28,emfp0(r31) ; Load single variant | |
1388 | blr | |
1389 | ||
1390 | stfs f28,emfp0(r31) ; Store single variant | |
1391 | blr | |
1392 | ||
1393 | lfd f28,emfp0(r31) ; Load double variant | |
1394 | blr | |
1395 | ||
1396 | stfd f28,emfp0(r31) ; Store double variant | |
1397 | blr | |
1398 | ||
1399 | lfs f29,emfp0(r31) ; Load single variant | |
1400 | blr | |
1401 | ||
1402 | stfs f29,emfp0(r31) ; Store single variant | |
1403 | blr | |
1404 | ||
1405 | lfd f29,emfp0(r31) ; Load double variant | |
1406 | blr | |
1407 | ||
1408 | stfd f29,emfp0(r31) ; Store double variant | |
1409 | blr | |
1410 | ||
1411 | lfs f30,emfp0(r31) ; Load single variant | |
1412 | blr | |
1413 | ||
1414 | stfs f30,emfp0(r31) ; Store single variant | |
1415 | blr | |
1416 | ||
1417 | lfd f30,emfp0(r31) ; Load double variant | |
1418 | blr | |
1419 | ||
1420 | stfd f30,emfp0(r31) ; Store double variant | |
1421 | blr | |
1422 | ||
1423 | lfs f31,emfp0(r31) ; Load single variant | |
1424 | blr | |
1425 | ||
1426 | stfs f31,emfp0(r31) ; Store single variant | |
1427 | blr | |
1428 | ||
1429 | lfd f31,emfp0(r31) ; Load double variant | |
1430 | blr | |
1431 | ||
1432 | stfd f31,emfp0(r31) ; Store double variant | |
1433 | blr | |
1c79356b | 1434 |