xor.h
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上传日期:2009-04-28
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文件大小:4k
- /*
- * linux/include/asm-arm/xor.h
- *
- * Copyright (C) 2001 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <asm-generic/xor.h>
- #define __XOR(a1, a2) a1 ^= a2
- #define GET_BLOCK_2(dst)
- __asm__("ldmia %0, {%1, %2}"
- : "=r" (dst), "=r" (a1), "=r" (a2)
- : "0" (dst))
- #define GET_BLOCK_4(dst)
- __asm__("ldmia %0, {%1, %2, %3, %4}"
- : "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4)
- : "0" (dst))
- #define XOR_BLOCK_2(src)
- __asm__("ldmia %0!, {%1, %2}"
- : "=r" (src), "=r" (b1), "=r" (b2)
- : "0" (src));
- __XOR(a1, b1); __XOR(a2, b2);
- #define XOR_BLOCK_4(src)
- __asm__("ldmia %0!, {%1, %2, %3, %4}"
- : "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4)
- : "0" (src));
- __XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
- #define PUT_BLOCK_2(dst)
- __asm__ __volatile__("stmia %0!, {%2, %3}"
- : "=r" (dst)
- : "0" (dst), "r" (a1), "r" (a2))
- #define PUT_BLOCK_4(dst)
- __asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}"
- : "=r" (dst)
- : "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
- static void
- xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
- {
- unsigned int lines = bytes / sizeof(unsigned long) / 4;
- register unsigned int a1 __asm__("r4");
- register unsigned int a2 __asm__("r5");
- register unsigned int a3 __asm__("r6");
- register unsigned int a4 __asm__("r7");
- register unsigned int b1 __asm__("r8");
- register unsigned int b2 __asm__("r9");
- register unsigned int b3 __asm__("ip");
- register unsigned int b4 __asm__("lr");
- do {
- GET_BLOCK_4(p1);
- XOR_BLOCK_4(p2);
- PUT_BLOCK_4(p1);
- } while (--lines);
- }
- static void
- xor_arm4regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3)
- {
- unsigned int lines = bytes / sizeof(unsigned long) / 4;
- register unsigned int a1 __asm__("r4");
- register unsigned int a2 __asm__("r5");
- register unsigned int a3 __asm__("r6");
- register unsigned int a4 __asm__("r7");
- register unsigned int b1 __asm__("r8");
- register unsigned int b2 __asm__("r9");
- register unsigned int b3 __asm__("ip");
- register unsigned int b4 __asm__("lr");
- do {
- GET_BLOCK_4(p1);
- XOR_BLOCK_4(p2);
- XOR_BLOCK_4(p3);
- PUT_BLOCK_4(p1);
- } while (--lines);
- }
- static void
- xor_arm4regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3, unsigned long *p4)
- {
- unsigned int lines = bytes / sizeof(unsigned long) / 2;
- register unsigned int a1 __asm__("r8");
- register unsigned int a2 __asm__("r9");
- register unsigned int b1 __asm__("ip");
- register unsigned int b2 __asm__("lr");
- do {
- GET_BLOCK_2(p1);
- XOR_BLOCK_2(p2);
- XOR_BLOCK_2(p3);
- XOR_BLOCK_2(p4);
- PUT_BLOCK_2(p1);
- } while (--lines);
- }
- static void
- xor_arm4regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3, unsigned long *p4, unsigned long *p5)
- {
- unsigned int lines = bytes / sizeof(unsigned long) / 2;
- register unsigned int a1 __asm__("r8");
- register unsigned int a2 __asm__("r9");
- register unsigned int b1 __asm__("ip");
- register unsigned int b2 __asm__("lr");
- do {
- GET_BLOCK_2(p1);
- XOR_BLOCK_2(p2);
- XOR_BLOCK_2(p3);
- XOR_BLOCK_2(p4);
- XOR_BLOCK_2(p5);
- PUT_BLOCK_2(p1);
- } while (--lines);
- }
- static struct xor_block_template xor_block_arm4regs = {
- .name = "arm4regs",
- .do_2 = xor_arm4regs_2,
- .do_3 = xor_arm4regs_3,
- .do_4 = xor_arm4regs_4,
- .do_5 = xor_arm4regs_5,
- };
- #undef XOR_TRY_TEMPLATES
- #define XOR_TRY_TEMPLATES
- do {
- xor_speed(&xor_block_arm4regs);
- xor_speed(&xor_block_8regs);
- xor_speed(&xor_block_32regs);
- } while (0)