arch/arm/include/asm/compiler.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_ARM_COMPILER_H
   3 #define __ASM_ARM_COMPILER_H
   4
   5 /*
   6  * This is used to ensure the compiler did actually allocate the register we
   7  * asked it for some inline assembly sequences.  Apparently we can't trust
   8  * the compiler from one version to another so a bit of paranoia won't hurt.
   9  * This string is meant to be concatenated with the inline asm string and
  10  * will cause compilation to stop on mismatch.
  11  * (for details, see gcc PR 15089)
  12  * For compatibility with clang, we have to specifically take the equivalence
  13  * of 'r11' <-> 'fp' and 'r12' <-> 'ip' into account as well.
  14  */
  15 #define __asmeq(x, y)                           \
  16         ".ifnc " x "," y "; "                   \
  17           ".ifnc " x y ",fpr11; "               \
  18             ".ifnc " x y ",r11fp; "             \
  19               ".ifnc " x y ",ipr12; "           \
  20                 ".ifnc " x y ",r12ip; "         \
  21                   ".err; "                      \
  22                 ".endif; "                      \
  23               ".endif; "                        \
  24             ".endif; "                          \
  25           ".endif; "                            \
  26         ".endif\n\t"
  27
  28
  29 #endif /* __ASM_ARM_COMPILER_H */