arch/s390/include/asm/fpu/api.h

   1 /*
   2  * In-kernel FPU support functions
   3  *
   4  * Copyright IBM Corp. 2015
   5  * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
   6  */
   7
   8 #ifndef _ASM_S390_FPU_API_H
   9 #define _ASM_S390_FPU_API_H
  10
  11 void save_fpu_regs(void);
  12
  13 static inline int test_fp_ctl(u32 fpc)
  14 {
  15         u32 orig_fpc;
  16         int rc;
  17
  18         asm volatile(
  19                 "       efpc    %1\n"
  20                 "       sfpc    %2\n"
  21                 "0:     sfpc    %1\n"
  22                 "       la      %0,0\n"
  23                 "1:\n"
  24                 EX_TABLE(0b,1b)
  25                 : "=d" (rc), "=&d" (orig_fpc)
  26                 : "d" (fpc), "0" (-EINVAL));
  27         return rc;
  28 }
  29
  30 #endif /* _ASM_S390_FPU_API_H */