Question

我有一个为armeabi-v7a编写的旧代码，我需要将其切换为arm64-v8a。代码的一部分在汇编器中被编写为宏，而arm64-v8a不支持指令集，而armeabi-v7a如何支持指令集。

    #define LOAD_ARGS_0()
    #define ASM_ARGS_0
    #define LOAD_ARGS_1(a1)             \
      int _a1tmp = (int) (a1);          \
      LOAD_ARGS_0 ()                \
      _a1 = _a1tmp;
    #define ASM_ARGS_1  ASM_ARGS_0, "r" (_a1)
    #define LOAD_ARGS_2(a1, a2)         \
      int _a2tmp = (int) (a2);          \
      LOAD_ARGS_1 (a1)              \
      register int _a2 asm ("a2") = _a2tmp;
    #define ASM_ARGS_2  ASM_ARGS_1, "r" (_a2)
    #define LOAD_ARGS_3(a1, a2, a3)         \
      int _a3tmp = (int) (a3);          \
      LOAD_ARGS_2 (a1, a2)              \
      register int _a3 asm ("a3") = _a3tmp;
    #define ASM_ARGS_3  ASM_ARGS_2, "r" (_a3)
    #define LOAD_ARGS_4(a1, a2, a3, a4)     \
      int _a4tmp = (int) (a4);          \
      LOAD_ARGS_3 (a1, a2, a3)          \
      register int _a4 asm ("a4") = _a4tmp;
    #define ASM_ARGS_4  ASM_ARGS_3, "r" (_a4)
    #define LOAD_ARGS_5(a1, a2, a3, a4, a5)     \
      int _v1tmp = (int) (a5);          \
      LOAD_ARGS_4 (a1, a2, a3, a4)          \
      register int _v1 asm ("v1") = _v1tmp;
    #define ASM_ARGS_5  ASM_ARGS_4, "r" (_v1)
    #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
      int _v2tmp = (int) (a6);          \
      LOAD_ARGS_5 (a1, a2, a3, a4, a5)      \
      register int _v2 asm ("v2") = _v2tmp;
    #define ASM_ARGS_6  ASM_ARGS_5, "r" (_v2)
    # define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7)    \
      int _v3tmp = (int) (a7);              \
      LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6)          \
      register int _v3 asm ("v3") = _v3tmp;
    # define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3)
    # define INTERNAL_SYSCALL_RAW(name, err, nr, args...)       \
      ({                                \
           register int _a1 asm ("r0"), _nr asm ("r7");     \
           LOAD_ARGS_##nr (args)                    \
           _nr = name;                      \
           __asm__ __volatile__ ("swi   0x0 @ syscall " #name   \
                 : "=r" (_a1)               \
                 : "r" (_nr) ASM_ARGS_##nr          \
                 : "memory");               \
           _a1; })

编译器报告- 错误：asm中的未知寄存器名称“ a2” res = INTERNAL_SYSCALL_RAW（__NR_set_robust_list，NULL，2，＆pd-> robust_head，sizeof（f_robust_list_head_type））;

此宏称为-

res = INTERNAL_SYSCALL_RAW (__NR_set_robust_list, NULL, 2, &pd->robust_head, sizeof (f_robust_list_head_type));

你们当中有人可以帮我吗？

如何在C ++代码中将ARMEABI-V7A汇编程序切换到ARM64？

0 个答案: