nsz Git - musl/blob - arch/mips/atomic_arch.h

   1 #define a_cas a_cas
   2 static inline int a_cas(volatile int *p, int t, int s)
   3 {
   4         int dummy;
   5         __asm__ __volatile__(
   6                 ".set push\n"
   7                 ".set mips2\n"
   8                 ".set noreorder\n"
   9                 "       sync\n"
  10                 "1:     ll %0, %2\n"
  11                 "       bne %0, %3, 1f\n"
  12                 "       addu %1, %4, $0\n"
  13                 "       sc %1, %2\n"
  14                 "       beq %1, $0, 1b\n"
  15                 "       nop\n"
  16                 "       sync\n"
  17                 "1:     \n"
  18                 ".set pop\n"
  19                 : "=&r"(t), "=&r"(dummy), "+m"(*p) : "r"(t), "r"(s) : "memory" );
  20         return t;
  21 }
  22
  23 #define a_swap a_swap
  24 static inline int a_swap(volatile int *x, int v)
  25 {
  26         int old, dummy;
  27         __asm__ __volatile__(
  28                 ".set push\n"
  29                 ".set mips2\n"
  30                 ".set noreorder\n"
  31                 "       sync\n"
  32                 "1:     ll %0, %2\n"
  33                 "       addu %1, %3, $0\n"
  34                 "       sc %1, %2\n"
  35                 "       beq %1, $0, 1b\n"
  36                 "       nop\n"
  37                 "       sync\n"
  38                 ".set pop\n"
  39                 : "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" );
  40         return old;
  41 }
  42
  43 #define a_fetch_add a_fetch_add
  44 static inline int a_fetch_add(volatile int *x, int v)
  45 {
  46         int old, dummy;
  47         __asm__ __volatile__(
  48                 ".set push\n"
  49                 ".set mips2\n"
  50                 ".set noreorder\n"
  51                 "       sync\n"
  52                 "1:     ll %0, %2\n"
  53                 "       addu %1, %0, %3\n"
  54                 "       sc %1, %2\n"
  55                 "       beq %1, $0, 1b\n"
  56                 "       nop\n"
  57                 "       sync\n"
  58                 ".set pop\n"
  59                 : "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" );
  60         return old;
  61 }