137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2001 Russell King
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*/
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#include "xor_impl.h"
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#include "xor_arch.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 * __restrict p1,
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const unsigned long * __restrict 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__("r10");
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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 * __restrict p1,
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const unsigned long * __restrict p2,
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const unsigned long * __restrict 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__("r10");
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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 * __restrict p1,
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const unsigned long * __restrict p2,
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const unsigned long * __restrict p3,
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const unsigned long * __restrict 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 * __restrict p1,
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const unsigned long * __restrict p2,
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const unsigned long * __restrict p3,
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const unsigned long * __restrict p4,
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const unsigned long * __restrict 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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DO_XOR_BLOCKS(arm4regs, xor_arm4regs_2, xor_arm4regs_3, xor_arm4regs_4,
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xor_arm4regs_5);
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struct xor_block_template xor_block_arm4regs = {
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.name = "arm4regs",
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.xor_gen = xor_gen_arm4regs,
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};
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