| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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] = *(freg_t *)(vxrs + i); |
| 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 | *(freg_t *)(vxrs + i) = fprs[i]; |
| 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 */ |