Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_htc_msm8960 / f68c56b7d2351036d1ec58c7a0ac4f258cbc1fa2 / . / arch / powerpc / lib / ldstfp.S
blob: 6a85380520b61163dff57eab585bfa1c4352bffb [file] [log] [blame]
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]1/*
2 * Floating-point, VMX/Altivec and VSX loads and stores
3 * for use in instruction emulation.
4 *
5 * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <asm/processor.h>
14#include <asm/ppc_asm.h>
15#include <asm/ppc-opcode.h>
16#include <asm/reg.h>
17#include <asm/asm-offsets.h>
18#include <linux/errno.h>
19
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]20#ifdef CONFIG_PPC_FPU
21
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]22#define STKFRM (PPC_MIN_STKFRM + 16)
23
24 .macro extab instr,handler
25 .section __ex_table,"a"
26 PPC_LONG \instr,\handler
27 .previous
28 .endm
29
30 .macro inst32 op
31reg = 0
32 .rept 32
3320: \op reg,0,r4
34 b 3f
35 extab 20b,99f
36reg = reg + 1
37 .endr
38 .endm
39
40/* Get the contents of frN into fr0; N is in r3. */
41_GLOBAL(get_fpr)
42 mflr r0
43 rlwinm r3,r3,3,0xf8
44 bcl 20,31,1f
45 blr /* fr0 is already in fr0 */
46 nop
47reg = 1
48 .rept 31
49 fmr fr0,reg
50 blr
51reg = reg + 1
52 .endr
531: mflr r5
54 add r5,r3,r5
55 mtctr r5
56 mtlr r0
57 bctr
58
59/* Put the contents of fr0 into frN; N is in r3. */
60_GLOBAL(put_fpr)
61 mflr r0
62 rlwinm r3,r3,3,0xf8
63 bcl 20,31,1f
64 blr /* fr0 is already in fr0 */
65 nop
66reg = 1
67 .rept 31
68 fmr reg,fr0
69 blr
70reg = reg + 1
71 .endr
721: mflr r5
73 add r5,r3,r5
74 mtctr r5
75 mtlr r0
76 bctr
77
78/* Load FP reg N from float at *p. N is in r3, p in r4. */
79_GLOBAL(do_lfs)
80 PPC_STLU r1,-STKFRM(r1)
81 mflr r0
82 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
83 mfmsr r6
84 ori r7,r6,MSR_FP
85 cmpwi cr7,r3,0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]86 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]87 isync
88 beq cr7,1f
89 stfd fr0,STKFRM-16(r1)
901: li r9,-EFAULT
912: lfs fr0,0(r4)
92 li r9,0
933: bl put_fpr
94 beq cr7,4f
95 lfd fr0,STKFRM-16(r1)
964: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
97 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]98 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]99 isync
100 mr r3,r9
101 addi r1,r1,STKFRM
102 blr
103 extab 2b,3b
104
105/* Load FP reg N from double at *p. N is in r3, p in r4. */
106_GLOBAL(do_lfd)
107 PPC_STLU r1,-STKFRM(r1)
108 mflr r0
109 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
110 mfmsr r6
111 ori r7,r6,MSR_FP
112 cmpwi cr7,r3,0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]113 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]114 isync
115 beq cr7,1f
116 stfd fr0,STKFRM-16(r1)
1171: li r9,-EFAULT
1182: lfd fr0,0(r4)
119 li r9,0
1203: beq cr7,4f
121 bl put_fpr
122 lfd fr0,STKFRM-16(r1)
1234: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
124 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]125 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]126 isync
127 mr r3,r9
128 addi r1,r1,STKFRM
129 blr
130 extab 2b,3b
131
132/* Store FP reg N to float at *p. N is in r3, p in r4. */
133_GLOBAL(do_stfs)
134 PPC_STLU r1,-STKFRM(r1)
135 mflr r0
136 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
137 mfmsr r6
138 ori r7,r6,MSR_FP
139 cmpwi cr7,r3,0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]140 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]141 isync
142 beq cr7,1f
143 stfd fr0,STKFRM-16(r1)
144 bl get_fpr
1451: li r9,-EFAULT
1462: stfs fr0,0(r4)
147 li r9,0
1483: beq cr7,4f
149 lfd fr0,STKFRM-16(r1)
1504: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
151 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]152 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]153 isync
154 mr r3,r9
155 addi r1,r1,STKFRM
156 blr
157 extab 2b,3b
158
159/* Store FP reg N to double at *p. N is in r3, p in r4. */
160_GLOBAL(do_stfd)
161 PPC_STLU r1,-STKFRM(r1)
162 mflr r0
163 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
164 mfmsr r6
165 ori r7,r6,MSR_FP
166 cmpwi cr7,r3,0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]167 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]168 isync
169 beq cr7,1f
170 stfd fr0,STKFRM-16(r1)
171 bl get_fpr
1721: li r9,-EFAULT
1732: stfd fr0,0(r4)
174 li r9,0
1753: beq cr7,4f
176 lfd fr0,STKFRM-16(r1)
1774: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
178 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]179 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]180 isync
181 mr r3,r9
182 addi r1,r1,STKFRM
183 blr
184 extab 2b,3b
185
186#ifdef CONFIG_ALTIVEC
187/* Get the contents of vrN into vr0; N is in r3. */
188_GLOBAL(get_vr)
189 mflr r0
190 rlwinm r3,r3,3,0xf8
191 bcl 20,31,1f
192 blr /* vr0 is already in vr0 */
193 nop
194reg = 1
195 .rept 31
196 vor vr0,reg,reg /* assembler doesn't know vmr? */
197 blr
198reg = reg + 1
199 .endr
2001: mflr r5
201 add r5,r3,r5
202 mtctr r5
203 mtlr r0
204 bctr
205
206/* Put the contents of vr0 into vrN; N is in r3. */
207_GLOBAL(put_vr)
208 mflr r0
209 rlwinm r3,r3,3,0xf8
210 bcl 20,31,1f
211 blr /* vr0 is already in vr0 */
212 nop
213reg = 1
214 .rept 31
215 vor reg,vr0,vr0
216 blr
217reg = reg + 1
218 .endr
2191: mflr r5
220 add r5,r3,r5
221 mtctr r5
222 mtlr r0
223 bctr
224
225/* Load vector reg N from *p. N is in r3, p in r4. */
226_GLOBAL(do_lvx)
227 PPC_STLU r1,-STKFRM(r1)
228 mflr r0
229 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
230 mfmsr r6
231 oris r7,r6,MSR_VEC@h
232 cmpwi cr7,r3,0
233 li r8,STKFRM-16
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]234 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]235 isync
236 beq cr7,1f
237 stvx vr0,r1,r8
2381: li r9,-EFAULT
2392: lvx vr0,0,r4
240 li r9,0
2413: beq cr7,4f
242 bl put_vr
243 lvx vr0,r1,r8
2444: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
245 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]246 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]247 isync
248 mr r3,r9
249 addi r1,r1,STKFRM
250 blr
251 extab 2b,3b
252
253/* Store vector reg N to *p. N is in r3, p in r4. */
254_GLOBAL(do_stvx)
255 PPC_STLU r1,-STKFRM(r1)
256 mflr r0
257 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
258 mfmsr r6
259 oris r7,r6,MSR_VEC@h
260 cmpwi cr7,r3,0
261 li r8,STKFRM-16
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]262 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]263 isync
264 beq cr7,1f
265 stvx vr0,r1,r8
266 bl get_vr
2671: li r9,-EFAULT
2682: stvx vr0,0,r4
269 li r9,0
2703: beq cr7,4f
271 lvx vr0,r1,r8
2724: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
273 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]274 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]275 isync
276 mr r3,r9
277 addi r1,r1,STKFRM
278 blr
279 extab 2b,3b
280#endif /* CONFIG_ALTIVEC */
281
282#ifdef CONFIG_VSX
283/* Get the contents of vsrN into vsr0; N is in r3. */
284_GLOBAL(get_vsr)
285 mflr r0
286 rlwinm r3,r3,3,0x1f8
287 bcl 20,31,1f
288 blr /* vsr0 is already in vsr0 */
289 nop
290reg = 1
291 .rept 63
292 XXLOR(0,reg,reg)
293 blr
294reg = reg + 1
295 .endr
2961: mflr r5
297 add r5,r3,r5
298 mtctr r5
299 mtlr r0
300 bctr
301
302/* Put the contents of vsr0 into vsrN; N is in r3. */
303_GLOBAL(put_vsr)
304 mflr r0
305 rlwinm r3,r3,3,0x1f8
306 bcl 20,31,1f
307 blr /* vr0 is already in vr0 */
308 nop
309reg = 1
310 .rept 63
311 XXLOR(reg,0,0)
312 blr
313reg = reg + 1
314 .endr
3151: mflr r5
316 add r5,r3,r5
317 mtctr r5
318 mtlr r0
319 bctr
320
321/* Load VSX reg N from vector doubleword *p. N is in r3, p in r4. */
322_GLOBAL(do_lxvd2x)
323 PPC_STLU r1,-STKFRM(r1)
324 mflr r0
325 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
326 mfmsr r6
327 oris r7,r6,MSR_VSX@h
328 cmpwi cr7,r3,0
329 li r8,STKFRM-16
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]330 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]331 isync
332 beq cr7,1f
333 STXVD2X(0,r1,r8)
3341: li r9,-EFAULT
3352: LXVD2X(0,0,r4)
336 li r9,0
3373: beq cr7,4f
338 bl put_vsr
339 LXVD2X(0,r1,r8)
3404: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
341 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]342 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]343 isync
344 mr r3,r9
345 addi r1,r1,STKFRM
346 blr
347 extab 2b,3b
348
349/* Store VSX reg N to vector doubleword *p. N is in r3, p in r4. */
350_GLOBAL(do_stxvd2x)
351 PPC_STLU r1,-STKFRM(r1)
352 mflr r0
353 PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1)
354 mfmsr r6
355 oris r7,r6,MSR_VSX@h
356 cmpwi cr7,r3,0
357 li r8,STKFRM-16
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]358 MTMSRD(r7)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]359 isync
360 beq cr7,1f
361 STXVD2X(0,r1,r8)
362 bl get_vsr
3631: li r9,-EFAULT
3642: STXVD2X(0,0,r4)
365 li r9,0
3663: beq cr7,4f
367 LXVD2X(0,r1,r8)
3684: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1)
369 mtlr r0
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]370 MTMSRD(r6)
Paul Mackerras0016a4c2010-06-15 14:48:58 +1000[diff] [blame]371 isync
372 mr r3,r9
373 addi r1,r1,STKFRM
374 blr
375 extab 2b,3b
376
377#endif /* CONFIG_VSX */
Sean MacLennancd64d162010-09-01 07:21:21 +0000[diff] [blame]378
379#endif /* CONFIG_PPC_FPU */