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211 lines
5.1 KiB
211 lines
5.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* arch/arm/include/asm/xor.h |
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* |
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* Copyright (C) 2001 Russell King |
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*/ |
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#include <linux/hardirq.h> |
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#include <asm-generic/xor.h> |
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#include <asm/hwcap.h> |
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#include <asm/neon.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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NEON_TEMPLATES; \ |
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} while (0) |
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#ifdef CONFIG_KERNEL_MODE_NEON |
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extern struct xor_block_template const xor_block_neon_inner; |
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static void |
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xor_neon_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) |
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{ |
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if (in_interrupt()) { |
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xor_arm4regs_2(bytes, p1, p2); |
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} else { |
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kernel_neon_begin(); |
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xor_block_neon_inner.do_2(bytes, p1, p2); |
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kernel_neon_end(); |
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} |
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} |
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static void |
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xor_neon_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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if (in_interrupt()) { |
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xor_arm4regs_3(bytes, p1, p2, p3); |
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} else { |
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kernel_neon_begin(); |
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xor_block_neon_inner.do_3(bytes, p1, p2, p3); |
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kernel_neon_end(); |
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} |
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} |
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static void |
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xor_neon_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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if (in_interrupt()) { |
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xor_arm4regs_4(bytes, p1, p2, p3, p4); |
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} else { |
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kernel_neon_begin(); |
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xor_block_neon_inner.do_4(bytes, p1, p2, p3, p4); |
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kernel_neon_end(); |
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} |
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} |
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static void |
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xor_neon_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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if (in_interrupt()) { |
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xor_arm4regs_5(bytes, p1, p2, p3, p4, p5); |
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} else { |
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kernel_neon_begin(); |
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xor_block_neon_inner.do_5(bytes, p1, p2, p3, p4, p5); |
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kernel_neon_end(); |
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} |
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} |
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static struct xor_block_template xor_block_neon = { |
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.name = "neon", |
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.do_2 = xor_neon_2, |
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.do_3 = xor_neon_3, |
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.do_4 = xor_neon_4, |
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.do_5 = xor_neon_5 |
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}; |
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#define NEON_TEMPLATES \ |
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do { if (cpu_has_neon()) xor_speed(&xor_block_neon); } while (0) |
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#else |
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#define NEON_TEMPLATES |
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#endif
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