diff options
Diffstat (limited to 'arch/s390/include/asm/fpu/api.h')
| -rw-r--r-- | arch/s390/include/asm/fpu/api.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h new file mode 100644 index 000000000000..5e04f3cbd320 --- /dev/null +++ b/arch/s390/include/asm/fpu/api.h @@ -0,0 +1,30 @@ +/* + * In-kernel FPU support functions + * + * Copyright IBM Corp. 2015 + * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> + */ + +#ifndef _ASM_S390_FPU_API_H +#define _ASM_S390_FPU_API_H + +void save_fpu_regs(void); + +static inline int test_fp_ctl(u32 fpc) +{ + u32 orig_fpc; + int rc; + + asm volatile( + " efpc %1\n" + " sfpc %2\n" + "0: sfpc %1\n" + " la %0,0\n" + "1:\n" + EX_TABLE(0b,1b) + : "=d" (rc), "=d" (orig_fpc) + : "d" (fpc), "0" (-EINVAL)); + return rc; +} + +#endif /* _ASM_S390_FPU_API_H */ |