xref: /linux/arch/arm/include/asm/compiler.h (revision 2ba9268dd603d23e17643437b2246acb6844953b)
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