diff options
Diffstat (limited to 'drivers/md/raid6mmx.c')
-rw-r--r-- | drivers/md/raid6mmx.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/drivers/md/raid6mmx.c b/drivers/md/raid6mmx.c deleted file mode 100644 index e7f6c13132bf..000000000000 --- a/drivers/md/raid6mmx.c +++ /dev/null | |||
@@ -1,142 +0,0 @@ | |||
1 | /* -*- linux-c -*- ------------------------------------------------------- * | ||
2 | * | ||
3 | * Copyright 2002 H. Peter Anvin - All Rights Reserved | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License as published by | ||
7 | * the Free Software Foundation, Inc., 53 Temple Place Ste 330, | ||
8 | * Boston MA 02111-1307, USA; either version 2 of the License, or | ||
9 | * (at your option) any later version; incorporated herein by reference. | ||
10 | * | ||
11 | * ----------------------------------------------------------------------- */ | ||
12 | |||
13 | /* | ||
14 | * raid6mmx.c | ||
15 | * | ||
16 | * MMX implementation of RAID-6 syndrome functions | ||
17 | */ | ||
18 | |||
19 | #if defined(__i386__) && !defined(__arch_um__) | ||
20 | |||
21 | #include <linux/raid/pq.h> | ||
22 | #include "raid6x86.h" | ||
23 | |||
24 | /* Shared with raid6sse1.c */ | ||
25 | const struct raid6_mmx_constants { | ||
26 | u64 x1d; | ||
27 | } raid6_mmx_constants = { | ||
28 | 0x1d1d1d1d1d1d1d1dULL, | ||
29 | }; | ||
30 | |||
31 | static int raid6_have_mmx(void) | ||
32 | { | ||
33 | /* Not really "boot_cpu" but "all_cpus" */ | ||
34 | return boot_cpu_has(X86_FEATURE_MMX); | ||
35 | } | ||
36 | |||
37 | /* | ||
38 | * Plain MMX implementation | ||
39 | */ | ||
40 | static void raid6_mmx1_gen_syndrome(int disks, size_t bytes, void **ptrs) | ||
41 | { | ||
42 | u8 **dptr = (u8 **)ptrs; | ||
43 | u8 *p, *q; | ||
44 | int d, z, z0; | ||
45 | |||
46 | z0 = disks - 3; /* Highest data disk */ | ||
47 | p = dptr[z0+1]; /* XOR parity */ | ||
48 | q = dptr[z0+2]; /* RS syndrome */ | ||
49 | |||
50 | kernel_fpu_begin(); | ||
51 | |||
52 | asm volatile("movq %0,%%mm0" : : "m" (raid6_mmx_constants.x1d)); | ||
53 | asm volatile("pxor %mm5,%mm5"); /* Zero temp */ | ||
54 | |||
55 | for ( d = 0 ; d < bytes ; d += 8 ) { | ||
56 | asm volatile("movq %0,%%mm2" : : "m" (dptr[z0][d])); /* P[0] */ | ||
57 | asm volatile("movq %mm2,%mm4"); /* Q[0] */ | ||
58 | for ( z = z0-1 ; z >= 0 ; z-- ) { | ||
59 | asm volatile("movq %0,%%mm6" : : "m" (dptr[z][d])); | ||
60 | asm volatile("pcmpgtb %mm4,%mm5"); | ||
61 | asm volatile("paddb %mm4,%mm4"); | ||
62 | asm volatile("pand %mm0,%mm5"); | ||
63 | asm volatile("pxor %mm5,%mm4"); | ||
64 | asm volatile("pxor %mm5,%mm5"); | ||
65 | asm volatile("pxor %mm6,%mm2"); | ||
66 | asm volatile("pxor %mm6,%mm4"); | ||
67 | } | ||
68 | asm volatile("movq %%mm2,%0" : "=m" (p[d])); | ||
69 | asm volatile("pxor %mm2,%mm2"); | ||
70 | asm volatile("movq %%mm4,%0" : "=m" (q[d])); | ||
71 | asm volatile("pxor %mm4,%mm4"); | ||
72 | } | ||
73 | |||
74 | kernel_fpu_end(); | ||
75 | } | ||
76 | |||
77 | const struct raid6_calls raid6_mmxx1 = { | ||
78 | raid6_mmx1_gen_syndrome, | ||
79 | raid6_have_mmx, | ||
80 | "mmxx1", | ||
81 | 0 | ||
82 | }; | ||
83 | |||
84 | /* | ||
85 | * Unrolled-by-2 MMX implementation | ||
86 | */ | ||
87 | static void raid6_mmx2_gen_syndrome(int disks, size_t bytes, void **ptrs) | ||
88 | { | ||
89 | u8 **dptr = (u8 **)ptrs; | ||
90 | u8 *p, *q; | ||
91 | int d, z, z0; | ||
92 | |||
93 | z0 = disks - 3; /* Highest data disk */ | ||
94 | p = dptr[z0+1]; /* XOR parity */ | ||
95 | q = dptr[z0+2]; /* RS syndrome */ | ||
96 | |||
97 | kernel_fpu_begin(); | ||
98 | |||
99 | asm volatile("movq %0,%%mm0" : : "m" (raid6_mmx_constants.x1d)); | ||
100 | asm volatile("pxor %mm5,%mm5"); /* Zero temp */ | ||
101 | asm volatile("pxor %mm7,%mm7"); /* Zero temp */ | ||
102 | |||
103 | for ( d = 0 ; d < bytes ; d += 16 ) { | ||
104 | asm volatile("movq %0,%%mm2" : : "m" (dptr[z0][d])); /* P[0] */ | ||
105 | asm volatile("movq %0,%%mm3" : : "m" (dptr[z0][d+8])); | ||
106 | asm volatile("movq %mm2,%mm4"); /* Q[0] */ | ||
107 | asm volatile("movq %mm3,%mm6"); /* Q[1] */ | ||
108 | for ( z = z0-1 ; z >= 0 ; z-- ) { | ||
109 | asm volatile("pcmpgtb %mm4,%mm5"); | ||
110 | asm volatile("pcmpgtb %mm6,%mm7"); | ||
111 | asm volatile("paddb %mm4,%mm4"); | ||
112 | asm volatile("paddb %mm6,%mm6"); | ||
113 | asm volatile("pand %mm0,%mm5"); | ||
114 | asm volatile("pand %mm0,%mm7"); | ||
115 | asm volatile("pxor %mm5,%mm4"); | ||
116 | asm volatile("pxor %mm7,%mm6"); | ||
117 | asm volatile("movq %0,%%mm5" : : "m" (dptr[z][d])); | ||
118 | asm volatile("movq %0,%%mm7" : : "m" (dptr[z][d+8])); | ||
119 | asm volatile("pxor %mm5,%mm2"); | ||
120 | asm volatile("pxor %mm7,%mm3"); | ||
121 | asm volatile("pxor %mm5,%mm4"); | ||
122 | asm volatile("pxor %mm7,%mm6"); | ||
123 | asm volatile("pxor %mm5,%mm5"); | ||
124 | asm volatile("pxor %mm7,%mm7"); | ||
125 | } | ||
126 | asm volatile("movq %%mm2,%0" : "=m" (p[d])); | ||
127 | asm volatile("movq %%mm3,%0" : "=m" (p[d+8])); | ||
128 | asm volatile("movq %%mm4,%0" : "=m" (q[d])); | ||
129 | asm volatile("movq %%mm6,%0" : "=m" (q[d+8])); | ||
130 | } | ||
131 | |||
132 | kernel_fpu_end(); | ||
133 | } | ||
134 | |||
135 | const struct raid6_calls raid6_mmxx2 = { | ||
136 | raid6_mmx2_gen_syndrome, | ||
137 | raid6_have_mmx, | ||
138 | "mmxx2", | ||
139 | 0 | ||
140 | }; | ||
141 | |||
142 | #endif | ||