linux/arch/arm/include/asm/compiler.h
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   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 */
  29