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| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-12-19 12:04:46 +0000 |
|---|---|---|
| committer | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-17 15:37:21 +0000 |
| commit | 123e4b3bbc0afd3cb596ecbe165533b368529a8e (patch) | |
| tree | 23f0f7f44d5073fb84edd04c0dec25088962b579 | |
| parent | 94bfb75ace81f7b09860400ba02ed1607a2e0e27 (diff) | |
| download | linux-123e4b3bbc0afd3cb596ecbe165533b368529a8e.tar.bz2 | |
MIPS: Use the new "ZC" constraint for MIPS R6
GCC versions supporting MIPS R6 use the ZC constraint to enforce a
9-bit offset for MIPS R6. We will use that for all MIPS R6 LL/SC
instructions.
Cc: Matthew Fortune <Matthew.Fortune@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
| -rw-r--r-- | arch/mips/include/asm/compiler.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/mips/include/asm/compiler.h b/arch/mips/include/asm/compiler.h index 34ad65a7801f..e081a265f422 100644 --- a/arch/mips/include/asm/compiler.h +++ b/arch/mips/include/asm/compiler.h @@ -16,13 +16,18 @@ #define GCC_REG_ACCUM "accum" #endif +#ifdef CONFIG_CPU_MIPSR6 +/* All MIPS R6 toolchains support the ZC constrain */ +#define GCC_OFF_SMALL_ASM() "ZC" +#else #ifndef CONFIG_CPU_MICROMIPS #define GCC_OFF_SMALL_ASM() "R" #elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9) #define GCC_OFF_SMALL_ASM() "ZC" #else #error "microMIPS compilation unsupported with GCC older than 4.9" -#endif +#endif /* CONFIG_CPU_MICROMIPS */ +#endif /* CONFIG_CPU_MIPSR6 */ #ifdef CONFIG_CPU_MIPSR6 #define MIPS_ISA_LEVEL "mips64r6" |