1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * FPU state and register content conversion primitives 4 * 5 * Copyright IBM Corp. 2015 6 * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 7 */ 8 9 #ifndef _ASM_S390_FPU_INTERNAL_H 10 #define _ASM_S390_FPU_INTERNAL_H 11 12 #include <linux/string.h> 13 #include <asm/ctl_reg.h> 14 #include <asm/fpu/types.h> 15 16 static inline void save_vx_regs(__vector128 *vxrs) 17 { 18 asm volatile( 19 " la 1,%0\n" 20 " .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */ 21 " .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */ 22 : "=Q" (*(struct vx_array *) vxrs) : : "1"); 23 } 24 25 static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs) 26 { 27 int i; 28 29 for (i = 0; i < __NUM_FPRS; i++) 30 fprs[i].ui = vxrs[i].high; 31 } 32 33 static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs) 34 { 35 int i; 36 37 for (i = 0; i < __NUM_FPRS; i++) 38 vxrs[i].high = fprs[i].ui; 39 } 40 41 static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu) 42 { 43 fpregs->pad = 0; 44 fpregs->fpc = fpu->fpc; 45 if (MACHINE_HAS_VX) 46 convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs); 47 else 48 memcpy((freg_t *)&fpregs->fprs, fpu->fprs, 49 sizeof(fpregs->fprs)); 50 } 51 52 static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu) 53 { 54 fpu->fpc = fpregs->fpc; 55 if (MACHINE_HAS_VX) 56 convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs); 57 else 58 memcpy(fpu->fprs, (freg_t *)&fpregs->fprs, 59 sizeof(fpregs->fprs)); 60 } 61 62 #endif /* _ASM_S390_FPU_INTERNAL_H */ 63