1 /* 2 * FPU state and register content conversion primitives 3 * 4 * Copyright IBM Corp. 2015 5 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 6 */ 7 8 #ifndef _ASM_S390_FPU_INTERNAL_H 9 #define _ASM_S390_FPU_INTERNAL_H 10 11 #include <linux/string.h> 12 #include <asm/ctl_reg.h> 13 #include <asm/fpu/types.h> 14 15 static inline void save_vx_regs(__vector128 *vxrs) 16 { 17 asm volatile( 18 " la 1,%0\n" 19 " .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */ 20 " .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */ 21 : "=Q" (*(struct vx_array *) vxrs) : : "1"); 22 } 23 24 static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs) 25 { 26 int i; 27 28 for (i = 0; i < __NUM_FPRS; i++) 29 fprs[i] = *(freg_t *)(vxrs + i); 30 } 31 32 static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs) 33 { 34 int i; 35 36 for (i = 0; i < __NUM_FPRS; i++) 37 *(freg_t *)(vxrs + i) = fprs[i]; 38 } 39 40 static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu) 41 { 42 fpregs->pad = 0; 43 fpregs->fpc = fpu->fpc; 44 if (MACHINE_HAS_VX) 45 convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs); 46 else 47 memcpy((freg_t *)&fpregs->fprs, fpu->fprs, 48 sizeof(fpregs->fprs)); 49 } 50 51 static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu) 52 { 53 fpu->fpc = fpregs->fpc; 54 if (MACHINE_HAS_VX) 55 convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs); 56 else 57 memcpy(fpu->fprs, (freg_t *)&fpregs->fprs, 58 sizeof(fpregs->fprs)); 59 } 60 61 #endif /* _ASM_S390_FPU_INTERNAL_H */ 62