arch/loongarch/lib/xor_simd.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * LoongArch SIMD XOR operations
   4  *
   5  * Copyright (C) 2023 WANG Xuerui <git@xen0n.name>
   6  */
   7
   8 #include "xor_simd.h"
   9
  10 /*
  11  * Process one cache line (64 bytes) per loop. This is assuming all future
  12  * popular LoongArch cores are similar performance-characteristics-wise to the
  13  * current models.
  14  */
  15 #define LINE_WIDTH 64
  16
  17 #ifdef CONFIG_CPU_HAS_LSX
  18
  19 #define LD(reg, base, offset)   \
  20         "vld $vr" #reg ", %[" #base "], " #offset "\n\t"
  21 #define ST(reg, base, offset)   \
  22         "vst $vr" #reg ", %[" #base "], " #offset "\n\t"
  23 #define XOR(dj, k)      "vxor.v $vr" #dj ", $vr" #dj ", $vr" #k "\n\t"
  24
  25 #define LD_INOUT_LINE(base)     \
  26         LD(0, base, 0)          \
  27         LD(1, base, 16)         \
  28         LD(2, base, 32)         \
  29         LD(3, base, 48)
  30
  31 #define LD_AND_XOR_LINE(base)   \
  32         LD(4, base, 0)          \
  33         LD(5, base, 16)         \
  34         LD(6, base, 32)         \
  35         LD(7, base, 48)         \
  36         XOR(0, 4)               \
  37         XOR(1, 5)               \
  38         XOR(2, 6)               \
  39         XOR(3, 7)
  40
  41 #define ST_LINE(base)           \
  42         ST(0, base, 0)          \
  43         ST(1, base, 16)         \
  44         ST(2, base, 32)         \
  45         ST(3, base, 48)
  46
  47 #define XOR_FUNC_NAME(nr) __xor_lsx_##nr
  48 #include "xor_template.c"
  49
  50 #undef LD
  51 #undef ST
  52 #undef XOR
  53 #undef LD_INOUT_LINE
  54 #undef LD_AND_XOR_LINE
  55 #undef ST_LINE
  56 #undef XOR_FUNC_NAME
  57
  58 #endif /* CONFIG_CPU_HAS_LSX */
  59
  60 #ifdef CONFIG_CPU_HAS_LASX
  61
  62 #define LD(reg, base, offset)   \
  63         "xvld $xr" #reg ", %[" #base "], " #offset "\n\t"
  64 #define ST(reg, base, offset)   \
  65         "xvst $xr" #reg ", %[" #base "], " #offset "\n\t"
  66 #define XOR(dj, k)      "xvxor.v $xr" #dj ", $xr" #dj ", $xr" #k "\n\t"
  67
  68 #define LD_INOUT_LINE(base)     \
  69         LD(0, base, 0)          \
  70         LD(1, base, 32)
  71
  72 #define LD_AND_XOR_LINE(base)   \
  73         LD(2, base, 0)          \
  74         LD(3, base, 32)         \
  75         XOR(0, 2)               \
  76         XOR(1, 3)
  77
  78 #define ST_LINE(base)           \
  79         ST(0, base, 0)          \
  80         ST(1, base, 32)
  81
  82 #define XOR_FUNC_NAME(nr) __xor_lasx_##nr
  83 #include "xor_template.c"
  84
  85 #undef LD
  86 #undef ST
  87 #undef XOR
  88 #undef LD_INOUT_LINE
  89 #undef LD_AND_XOR_LINE
  90 #undef ST_LINE
  91 #undef XOR_FUNC_NAME
  92
  93 #endif /* CONFIG_CPU_HAS_LASX */