63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* FPU state and register content conversion primitives
|
|
*
|
|
* Copyright IBM Corp. 2015
|
|
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_FPU_INTERNAL_H
|
|
#define _ASM_S390_FPU_INTERNAL_H
|
|
|
|
#include <linux/string.h>
|
|
#include <asm/ctl_reg.h>
|
|
#include <asm/fpu/types.h>
|
|
|
|
static inline void save_vx_regs(__vector128 *vxrs)
|
|
{
|
|
asm volatile(
|
|
" la 1,%0\n"
|
|
" .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */
|
|
" .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */
|
|
: "=Q" (*(struct vx_array *) vxrs) : : "1");
|
|
}
|
|
|
|
static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < __NUM_FPRS; i++)
|
|
fprs[i].ui = vxrs[i].high;
|
|
}
|
|
|
|
static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < __NUM_FPRS; i++)
|
|
vxrs[i].high = fprs[i].ui;
|
|
}
|
|
|
|
static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
|
|
{
|
|
fpregs->pad = 0;
|
|
fpregs->fpc = fpu->fpc;
|
|
if (MACHINE_HAS_VX)
|
|
convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
|
|
else
|
|
memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
|
|
sizeof(fpregs->fprs));
|
|
}
|
|
|
|
static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
|
|
{
|
|
fpu->fpc = fpregs->fpc;
|
|
if (MACHINE_HAS_VX)
|
|
convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
|
|
else
|
|
memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
|
|
sizeof(fpregs->fprs));
|
|
}
|
|
|
|
#endif /* _ASM_S390_FPU_INTERNAL_H */
|