1 #ifdef CONFIG_KMEMCHECK
2 /* kmemcheck doesn't handle MMX/SSE/SSE2 instructions */
3 # include <asm-generic/xor.h>
4 #elif !defined(_ASM_X86_XOR_H)
8 * Optimized RAID-5 checksumming functions for SSE.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * You should have received a copy of the GNU General Public License
16 * (for example /usr/src/linux/COPYING); if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * Cache avoiding checksumming functions utilizing KNI instructions
22 * Copyright (C) 1999 Zach Brown (with obvious credit due Ingo)
27 * High-speed RAID5 checksumming functions utilizing SSE instructions.
28 * Copyright (C) 1998 Ingo Molnar.
32 * x86-64 changes / gcc fixes from Andi Kleen.
33 * Copyright 2002 Andi Kleen, SuSE Labs.
35 * This hasn't been optimized for the hammer yet, but there are likely
36 * no advantages to be gotten from x86-64 here anyways.
42 /* reduce register pressure */
43 # define XOR_CONSTANT_CONSTRAINT "i"
45 # define XOR_CONSTANT_CONSTRAINT "re"
48 #define OFFS(x) "16*("#x")"
49 #define PF_OFFS(x) "256+16*("#x")"
50 #define PF0(x) " prefetchnta "PF_OFFS(x)"(%[p1]) ;\n"
51 #define LD(x, y) " movaps "OFFS(x)"(%[p1]), %%xmm"#y" ;\n"
52 #define ST(x, y) " movaps %%xmm"#y", "OFFS(x)"(%[p1]) ;\n"
53 #define PF1(x) " prefetchnta "PF_OFFS(x)"(%[p2]) ;\n"
54 #define PF2(x) " prefetchnta "PF_OFFS(x)"(%[p3]) ;\n"
55 #define PF3(x) " prefetchnta "PF_OFFS(x)"(%[p4]) ;\n"
56 #define PF4(x) " prefetchnta "PF_OFFS(x)"(%[p5]) ;\n"
57 #define XO1(x, y) " xorps "OFFS(x)"(%[p2]), %%xmm"#y" ;\n"
58 #define XO2(x, y) " xorps "OFFS(x)"(%[p3]), %%xmm"#y" ;\n"
59 #define XO3(x, y) " xorps "OFFS(x)"(%[p4]), %%xmm"#y" ;\n"
60 #define XO4(x, y) " xorps "OFFS(x)"(%[p5]), %%xmm"#y" ;\n"
63 #define BLK64(pf, op, i) \
71 xor_sse_2(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
)
73 unsigned long lines
= bytes
>> 8;
109 " add %[inc], %[p1] ;\n"
110 " add %[inc], %[p2] ;\n"
113 : [cnt
] "+r" (lines
),
114 [p1
] "+r" (p1
), [p2
] "+r" (p2
)
115 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
122 xor_sse_2_pf64(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
)
124 unsigned long lines
= bytes
>> 8;
143 " add %[inc], %[p1] ;\n"
144 " add %[inc], %[p2] ;\n"
147 : [cnt
] "+r" (lines
),
148 [p1
] "+r" (p1
), [p2
] "+r" (p2
)
149 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
156 xor_sse_3(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
159 unsigned long lines
= bytes
>> 8;
201 " add %[inc], %[p1] ;\n"
202 " add %[inc], %[p2] ;\n"
203 " add %[inc], %[p3] ;\n"
206 : [cnt
] "+r" (lines
),
207 [p1
] "+r" (p1
), [p2
] "+r" (p2
), [p3
] "+r" (p3
)
208 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
215 xor_sse_3_pf64(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
218 unsigned long lines
= bytes
>> 8;
238 " add %[inc], %[p1] ;\n"
239 " add %[inc], %[p2] ;\n"
240 " add %[inc], %[p3] ;\n"
243 : [cnt
] "+r" (lines
),
244 [p1
] "+r" (p1
), [p2
] "+r" (p2
), [p3
] "+r" (p3
)
245 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
252 xor_sse_4(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
253 unsigned long *p3
, unsigned long *p4
)
255 unsigned long lines
= bytes
>> 8;
303 " add %[inc], %[p1] ;\n"
304 " add %[inc], %[p2] ;\n"
305 " add %[inc], %[p3] ;\n"
306 " add %[inc], %[p4] ;\n"
309 : [cnt
] "+r" (lines
), [p1
] "+r" (p1
),
310 [p2
] "+r" (p2
), [p3
] "+r" (p3
), [p4
] "+r" (p4
)
311 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
318 xor_sse_4_pf64(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
319 unsigned long *p3
, unsigned long *p4
)
321 unsigned long lines
= bytes
>> 8;
342 " add %[inc], %[p1] ;\n"
343 " add %[inc], %[p2] ;\n"
344 " add %[inc], %[p3] ;\n"
345 " add %[inc], %[p4] ;\n"
348 : [cnt
] "+r" (lines
), [p1
] "+r" (p1
),
349 [p2
] "+r" (p2
), [p3
] "+r" (p3
), [p4
] "+r" (p4
)
350 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
357 xor_sse_5(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
358 unsigned long *p3
, unsigned long *p4
, unsigned long *p5
)
360 unsigned long lines
= bytes
>> 8;
414 " add %[inc], %[p1] ;\n"
415 " add %[inc], %[p2] ;\n"
416 " add %[inc], %[p3] ;\n"
417 " add %[inc], %[p4] ;\n"
418 " add %[inc], %[p5] ;\n"
421 : [cnt
] "+r" (lines
), [p1
] "+r" (p1
), [p2
] "+r" (p2
),
422 [p3
] "+r" (p3
), [p4
] "+r" (p4
), [p5
] "+r" (p5
)
423 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
430 xor_sse_5_pf64(unsigned long bytes
, unsigned long *p1
, unsigned long *p2
,
431 unsigned long *p3
, unsigned long *p4
, unsigned long *p5
)
433 unsigned long lines
= bytes
>> 8;
455 " add %[inc], %[p1] ;\n"
456 " add %[inc], %[p2] ;\n"
457 " add %[inc], %[p3] ;\n"
458 " add %[inc], %[p4] ;\n"
459 " add %[inc], %[p5] ;\n"
462 : [cnt
] "+r" (lines
), [p1
] "+r" (p1
), [p2
] "+r" (p2
),
463 [p3
] "+r" (p3
), [p4
] "+r" (p4
), [p5
] "+r" (p5
)
464 : [inc
] XOR_CONSTANT_CONSTRAINT (256UL)
470 static struct xor_block_template xor_block_sse_pf64
= {
471 .name
= "prefetch64-sse",
472 .do_2
= xor_sse_2_pf64
,
473 .do_3
= xor_sse_3_pf64
,
474 .do_4
= xor_sse_4_pf64
,
475 .do_5
= xor_sse_5_pf64
,
488 #undef XOR_CONSTANT_CONSTRAINT
491 # include <asm/xor_32.h>
493 # include <asm/xor_64.h>
496 #define XOR_SELECT_TEMPLATE(FASTEST) \
499 #endif /* _ASM_X86_XOR_H */