diff options
Diffstat (limited to 'arch/arm/include/asm/xor.h')
| -rw-r--r-- | arch/arm/include/asm/xor.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/arch/arm/include/asm/xor.h b/arch/arm/include/asm/xor.h new file mode 100644 index 00000000000..7604673dc42 --- /dev/null +++ b/arch/arm/include/asm/xor.h @@ -0,0 +1,141 @@ +/* + * arch/arm/include/asm/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) |