arch/arm/include/asm/compiler.h

   1 #ifndef __ASM_ARM_COMPILER_H
   2 #define __ASM_ARM_COMPILER_H
   3
   4 /*
   5  * This is used to ensure the compiler did actually allocate the register we
   6  * asked it for some inline assembly sequences.  Apparently we can't trust
   7  * the compiler from one version to another so a bit of paranoia won't hurt.
   8  * This string is meant to be concatenated with the inline asm string and
   9  * will cause compilation to stop on mismatch.
  10  * (for details, see gcc PR 15089)
  11  * For compatibility with clang, we have to specifically take the equivalence
  12  * of 'r11' <-> 'fp' and 'r12' <-> 'ip' into account as well.
  13  */
  14 #define __asmeq(x, y)                           \
  15         ".ifnc " x "," y "; "                   \
  16           ".ifnc " x y ",fpr11; "               \
  17             ".ifnc " x y ",r11fp; "             \
  18               ".ifnc " x y ",ipr12; "           \
  19                 ".ifnc " x y ",r12ip; "         \
  20                   ".err; "                      \
  21                 ".endif; "                      \
  22               ".endif; "                        \
  23             ".endif; "                          \
  24           ".endif; "                            \
  25         ".endif\n\t"
  26
  27
  28 #endif /* __ASM_ARM_COMPILER_H */