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1276 |
phoenix |
/*
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* linux/include/asm-arm/xor.h
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*
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* Copyright (C) 2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <asm-generic/xor.h>
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#define __XOR(a1, a2) a1 ^= a2
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#define GET_BLOCK_2(dst) \
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__asm__("ldmia %0, {%1, %2}" \
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: "=r" (dst), "=r" (a1), "=r" (a2) \
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: "0" (dst))
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#define GET_BLOCK_4(dst) \
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__asm__("ldmia %0, {%1, %2, %3, %4}" \
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: "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \
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: "0" (dst))
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#define XOR_BLOCK_2(src) \
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__asm__("ldmia %0!, {%1, %2}" \
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: "=r" (src), "=r" (b1), "=r" (b2) \
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: "0" (src)); \
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__XOR(a1, b1); __XOR(a2, b2);
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#define XOR_BLOCK_4(src) \
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__asm__("ldmia %0!, {%1, %2, %3, %4}" \
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: "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \
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: "0" (src)); \
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__XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
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#define PUT_BLOCK_2(dst) \
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__asm__ __volatile__("stmia %0!, {%2, %3}" \
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: "=r" (dst) \
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: "0" (dst), "r" (a1), "r" (a2))
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#define PUT_BLOCK_4(dst) \
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__asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}" \
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: "=r" (dst) \
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: "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
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static void
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xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
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{
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unsigned int lines = bytes / sizeof(unsigned long) / 4;
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register unsigned int a1 __asm__("r4");
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register unsigned int a2 __asm__("r5");
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register unsigned int a3 __asm__("r6");
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register unsigned int a4 __asm__("r7");
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register unsigned int b1 __asm__("r8");
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register unsigned int b2 __asm__("r9");
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register unsigned int b3 __asm__("ip");
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register unsigned int b4 __asm__("lr");
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do {
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GET_BLOCK_4(p1);
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XOR_BLOCK_4(p2);
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PUT_BLOCK_4(p1);
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} while (--lines);
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}
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static void
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xor_arm4regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3)
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{
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unsigned int lines = bytes / sizeof(unsigned long) / 4;
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register unsigned int a1 __asm__("r4");
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register unsigned int a2 __asm__("r5");
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register unsigned int a3 __asm__("r6");
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register unsigned int a4 __asm__("r7");
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register unsigned int b1 __asm__("r8");
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register unsigned int b2 __asm__("r9");
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register unsigned int b3 __asm__("ip");
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register unsigned int b4 __asm__("lr");
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do {
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GET_BLOCK_4(p1);
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XOR_BLOCK_4(p2);
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XOR_BLOCK_4(p3);
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PUT_BLOCK_4(p1);
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} while (--lines);
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}
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static void
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xor_arm4regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4)
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{
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unsigned int lines = bytes / sizeof(unsigned long) / 2;
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register unsigned int a1 __asm__("r8");
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register unsigned int a2 __asm__("r9");
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register unsigned int b1 __asm__("ip");
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register unsigned int b2 __asm__("lr");
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do {
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GET_BLOCK_2(p1);
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XOR_BLOCK_2(p2);
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XOR_BLOCK_2(p3);
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XOR_BLOCK_2(p4);
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PUT_BLOCK_2(p1);
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} while (--lines);
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}
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static void
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xor_arm4regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4, unsigned long *p5)
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{
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unsigned int lines = bytes / sizeof(unsigned long) / 2;
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register unsigned int a1 __asm__("r8");
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register unsigned int a2 __asm__("r9");
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register unsigned int b1 __asm__("ip");
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register unsigned int b2 __asm__("lr");
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do {
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GET_BLOCK_2(p1);
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XOR_BLOCK_2(p2);
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XOR_BLOCK_2(p3);
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XOR_BLOCK_2(p4);
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XOR_BLOCK_2(p5);
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PUT_BLOCK_2(p1);
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} while (--lines);
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}
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static struct xor_block_template xor_block_arm4regs = {
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.name = "arm4regs",
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.do_2 = xor_arm4regs_2,
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.do_3 = xor_arm4regs_3,
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.do_4 = xor_arm4regs_4,
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.do_5 = xor_arm4regs_5,
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};
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#undef XOR_TRY_TEMPLATES
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#define XOR_TRY_TEMPLATES \
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do { \
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xor_speed(&xor_block_arm4regs); \
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xor_speed(&xor_block_8regs); \
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xor_speed(&xor_block_32regs); \
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} while (0)
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