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 */ 31