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Diffstat (limited to 'arch/arm/include/asm/compiler.h')
| -rw-r--r-- | arch/arm/include/asm/compiler.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/include/asm/compiler.h b/arch/arm/include/asm/compiler.h new file mode 100644 index 000000000..5e94e67d1 --- /dev/null +++ b/arch/arm/include/asm/compiler.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_ARM_COMPILER_H +#define __ASM_ARM_COMPILER_H + +/* + * This is used to ensure the compiler did actually allocate the register we + * asked it for some inline assembly sequences. Apparently we can't trust + * the compiler from one version to another so a bit of paranoia won't hurt. + * This string is meant to be concatenated with the inline asm string and + * will cause compilation to stop on mismatch. + * (for details, see gcc PR 15089) + * For compatibility with clang, we have to specifically take the equivalence + * of 'r11' <-> 'fp' and 'r12' <-> 'ip' into account as well. + */ +#define __asmeq(x, y) \ + ".ifnc " x "," y "; " \ + ".ifnc " x y ",fpr11; " \ + ".ifnc " x y ",r11fp; " \ + ".ifnc " x y ",ipr12; " \ + ".ifnc " x y ",r12ip; " \ + ".err; " \ + ".endif; " \ + ".endif; " \ + ".endif; " \ + ".endif; " \ + ".endif\n\t" + + +#endif /* __ASM_ARM_COMPILER_H */ |