projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/include/asm-arm/xor.h | |
| 3 | * | |
| 4 | * Copyright (C) 2001 Russell King | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | #include <asm-generic/xor.h> | |
| 11 | ||
| 12 | #define __XOR(a1, a2) a1 ^= a2 | |
| 13 | ||
| 14 | #define GET_BLOCK_2(dst) \ | |
| 15 | __asm__("ldmia %0, {%1, %2}" \ | |
| 16 | : "=r" (dst), "=r" (a1), "=r" (a2) \ | |
| 17 | : "0" (dst)) | |
| 18 | ||
| 19 | #define GET_BLOCK_4(dst) \ | |
| 20 | __asm__("ldmia %0, {%1, %2, %3, %4}" \ | |
| 21 | : "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \ | |
| 22 | : "0" (dst)) | |
| 23 | ||
| 24 | #define XOR_BLOCK_2(src) \ | |
| 25 | __asm__("ldmia %0!, {%1, %2}" \ | |
| 26 | : "=r" (src), "=r" (b1), "=r" (b2) \ | |
| 27 | : "0" (src)); \ | |
| 28 | __XOR(a1, b1); __XOR(a2, b2); | |
| 29 | ||
| 30 | #define XOR_BLOCK_4(src) \ | |
| 31 | __asm__("ldmia %0!, {%1, %2, %3, %4}" \ | |
| 32 | : "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \ | |
| 33 | : "0" (src)); \ | |
| 34 | __XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4) | |
| 35 | ||
| 36 | #define PUT_BLOCK_2(dst) \ | |
| 37 | __asm__ __volatile__("stmia %0!, {%2, %3}" \ | |
| 38 | : "=r" (dst) \ | |
| 39 | : "0" (dst), "r" (a1), "r" (a2)) | |
| 40 | ||
| 41 | #define PUT_BLOCK_4(dst) \ | |
| 42 | __asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}" \ | |
| 43 | : "=r" (dst) \ | |
| 44 | : "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4)) | |
| 45 | ||
| 46 | static void | |
| 47 | xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) | |
| 48 | { | |
| 49 | unsigned int lines = bytes / sizeof(unsigned long) / 4; | |
| 50 | register unsigned int a1 __asm__("r4"); | |
| 51 | register unsigned int a2 __asm__("r5"); | |
| 52 | register unsigned int a3 __asm__("r6"); | |
| 53 | register unsigned int a4 __asm__("r7"); | |
| 54 | register unsigned int b1 __asm__("r8"); | |
| 55 | register unsigned int b2 __asm__("r9"); | |
| 56 | register unsigned int b3 __asm__("ip"); | |
| 57 | register unsigned int b4 __asm__("lr"); | |
| 58 | ||
| 59 | do { | |
| 60 | GET_BLOCK_4(p1); | |
| 61 | XOR_BLOCK_4(p2); | |
| 62 | PUT_BLOCK_4(p1); | |
| 63 | } while (--lines); | |
| 64 | } | |
| 65 | ||
| 66 | static void | |
| 67 | xor_arm4regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, | |
| 68 | unsigned long *p3) | |
| 69 | { | |
| 70 | unsigned int lines = bytes / sizeof(unsigned long) / 4; | |
| 71 | register unsigned int a1 __asm__("r4"); | |
| 72 | register unsigned int a2 __asm__("r5"); | |
| 73 | register unsigned int a3 __asm__("r6"); | |
| 74 | register unsigned int a4 __asm__("r7"); | |
| 75 | register unsigned int b1 __asm__("r8"); | |
| 76 | register unsigned int b2 __asm__("r9"); | |
| 77 | register unsigned int b3 __asm__("ip"); | |
| 78 | register unsigned int b4 __asm__("lr"); | |
| 79 | ||
| 80 | do { | |
| 81 | GET_BLOCK_4(p1); | |
| 82 | XOR_BLOCK_4(p2); | |
| 83 | XOR_BLOCK_4(p3); | |
| 84 | PUT_BLOCK_4(p1); | |
| 85 | } while (--lines); | |
| 86 | } | |
| 87 | ||
| 88 | static void | |
| 89 | xor_arm4regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, | |
| 90 | unsigned long *p3, unsigned long *p4) | |
| 91 | { | |
| 92 | unsigned int lines = bytes / sizeof(unsigned long) / 2; | |
| 93 | register unsigned int a1 __asm__("r8"); | |
| 94 | register unsigned int a2 __asm__("r9"); | |
| 95 | register unsigned int b1 __asm__("ip"); | |
| 96 | register unsigned int b2 __asm__("lr"); | |
| 97 | ||
| 98 | do { | |
| 99 | GET_BLOCK_2(p1); | |
| 100 | XOR_BLOCK_2(p2); | |
| 101 | XOR_BLOCK_2(p3); | |
| 102 | XOR_BLOCK_2(p4); | |
| 103 | PUT_BLOCK_2(p1); | |
| 104 | } while (--lines); | |
| 105 | } | |
| 106 | ||
| 107 | static void | |
| 108 | xor_arm4regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, | |
| 109 | unsigned long *p3, unsigned long *p4, unsigned long *p5) | |
| 110 | { | |
| 111 | unsigned int lines = bytes / sizeof(unsigned long) / 2; | |
| 112 | register unsigned int a1 __asm__("r8"); | |
| 113 | register unsigned int a2 __asm__("r9"); | |
| 114 | register unsigned int b1 __asm__("ip"); | |
| 115 | register unsigned int b2 __asm__("lr"); | |
| 116 | ||
| 117 | do { | |
| 118 | GET_BLOCK_2(p1); | |
| 119 | XOR_BLOCK_2(p2); | |
| 120 | XOR_BLOCK_2(p3); | |
| 121 | XOR_BLOCK_2(p4); | |
| 122 | XOR_BLOCK_2(p5); | |
| 123 | PUT_BLOCK_2(p1); | |
| 124 | } while (--lines); | |
| 125 | } | |
| 126 | ||
| 127 | static struct xor_block_template xor_block_arm4regs = { | |
| 128 | .name = "arm4regs", | |
| 129 | .do_2 = xor_arm4regs_2, | |
| 130 | .do_3 = xor_arm4regs_3, | |
| 131 | .do_4 = xor_arm4regs_4, | |
| 132 | .do_5 = xor_arm4regs_5, | |
| 133 | }; | |
| 134 | ||
| 135 | #undef XOR_TRY_TEMPLATES | |
| 136 | #define XOR_TRY_TEMPLATES \ | |
| 137 | do { \ | |
| 138 | xor_speed(&xor_block_arm4regs); \ | |
| 139 | xor_speed(&xor_block_8regs); \ | |
| 140 | xor_speed(&xor_block_32regs); \ | |
| 141 | } while (0) |