1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * arch/arm/include/asm/xor.h
5 * Copyright (C) 2001 Russell King
7 #include <linux/hardirq.h>
8 #include <asm-generic/xor.h>
12 #define __XOR(a1, a2) a1 ^= a2
14 #define GET_BLOCK_2(dst) \
15 __asm__("ldmia %0, {%1, %2}" \
16 : "=r" (dst), "=r" (a1), "=r" (a2) \
19 #define GET_BLOCK_4(dst) \
20 __asm__("ldmia %0, {%1, %2, %3, %4}" \
21 : "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \
24 #define XOR_BLOCK_2(src) \
25 __asm__("ldmia %0!, {%1, %2}" \
26 : "=r" (src), "=r" (b1), "=r" (b2) \
28 __XOR(a1, b1); __XOR(a2, b2);
30 #define XOR_BLOCK_4(src) \
31 __asm__("ldmia %0!, {%1, %2, %3, %4}" \
32 : "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \
34 __XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
36 #define PUT_BLOCK_2(dst) \
37 __asm__ __volatile__("stmia %0!, {%2, %3}" \
39 : "0" (dst), "r" (a1), "r" (a2))
41 #define PUT_BLOCK_4(dst) \
42 __asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}" \
44 : "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
47 xor_arm4regs_2(unsigned long bytes, unsigned long * __restrict p1,
48 const unsigned long * __restrict p2)
50 unsigned int lines = bytes / sizeof(unsigned long) / 4;
51 register unsigned int a1 __asm__("r4");
52 register unsigned int a2 __asm__("r5");
53 register unsigned int a3 __asm__("r6");
54 register unsigned int a4 __asm__("r7");
55 register unsigned int b1 __asm__("r8");
56 register unsigned int b2 __asm__("r9");
57 register unsigned int b3 __asm__("ip");
58 register unsigned int b4 __asm__("lr");
68 xor_arm4regs_3(unsigned long bytes, unsigned long * __restrict p1,
69 const unsigned long * __restrict p2,
70 const unsigned long * __restrict p3)
72 unsigned int lines = bytes / sizeof(unsigned long) / 4;
73 register unsigned int a1 __asm__("r4");
74 register unsigned int a2 __asm__("r5");
75 register unsigned int a3 __asm__("r6");
76 register unsigned int a4 __asm__("r7");
77 register unsigned int b1 __asm__("r8");
78 register unsigned int b2 __asm__("r9");
79 register unsigned int b3 __asm__("ip");
80 register unsigned int b4 __asm__("lr");
91 xor_arm4regs_4(unsigned long bytes, unsigned long * __restrict p1,
92 const unsigned long * __restrict p2,
93 const unsigned long * __restrict p3,
94 const unsigned long * __restrict p4)
96 unsigned int lines = bytes / sizeof(unsigned long) / 2;
97 register unsigned int a1 __asm__("r8");
98 register unsigned int a2 __asm__("r9");
99 register unsigned int b1 __asm__("ip");
100 register unsigned int b2 __asm__("lr");
112 xor_arm4regs_5(unsigned long bytes, unsigned long * __restrict p1,
113 const unsigned long * __restrict p2,
114 const unsigned long * __restrict p3,
115 const unsigned long * __restrict p4,
116 const unsigned long * __restrict p5)
118 unsigned int lines = bytes / sizeof(unsigned long) / 2;
119 register unsigned int a1 __asm__("r8");
120 register unsigned int a2 __asm__("r9");
121 register unsigned int b1 __asm__("ip");
122 register unsigned int b2 __asm__("lr");
134 static struct xor_block_template xor_block_arm4regs = {
136 .do_2 = xor_arm4regs_2,
137 .do_3 = xor_arm4regs_3,
138 .do_4 = xor_arm4regs_4,
139 .do_5 = xor_arm4regs_5,
142 #undef XOR_TRY_TEMPLATES
143 #define XOR_TRY_TEMPLATES \
145 xor_speed(&xor_block_arm4regs); \
146 xor_speed(&xor_block_8regs); \
147 xor_speed(&xor_block_32regs); \
151 #ifdef CONFIG_KERNEL_MODE_NEON
153 extern struct xor_block_template const xor_block_neon_inner;
156 xor_neon_2(unsigned long bytes, unsigned long * __restrict p1,
157 const unsigned long * __restrict p2)
159 if (in_interrupt()) {
160 xor_arm4regs_2(bytes, p1, p2);
163 xor_block_neon_inner.do_2(bytes, p1, p2);
169 xor_neon_3(unsigned long bytes, unsigned long * __restrict p1,
170 const unsigned long * __restrict p2,
171 const unsigned long * __restrict p3)
173 if (in_interrupt()) {
174 xor_arm4regs_3(bytes, p1, p2, p3);
177 xor_block_neon_inner.do_3(bytes, p1, p2, p3);
183 xor_neon_4(unsigned long bytes, unsigned long * __restrict p1,
184 const unsigned long * __restrict p2,
185 const unsigned long * __restrict p3,
186 const unsigned long * __restrict p4)
188 if (in_interrupt()) {
189 xor_arm4regs_4(bytes, p1, p2, p3, p4);
192 xor_block_neon_inner.do_4(bytes, p1, p2, p3, p4);
198 xor_neon_5(unsigned long bytes, unsigned long * __restrict p1,
199 const unsigned long * __restrict p2,
200 const unsigned long * __restrict p3,
201 const unsigned long * __restrict p4,
202 const unsigned long * __restrict p5)
204 if (in_interrupt()) {
205 xor_arm4regs_5(bytes, p1, p2, p3, p4, p5);
208 xor_block_neon_inner.do_5(bytes, p1, p2, p3, p4, p5);
213 static struct xor_block_template xor_block_neon = {
221 #define NEON_TEMPLATES \
222 do { if (cpu_has_neon()) xor_speed(&xor_block_neon); } while (0)
224 #define NEON_TEMPLATES