mirror of https://gitee.com/openkylin/linux.git
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
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*
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*/
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#ifndef _ASM_ARC_FPU_H
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#define _ASM_ARC_FPU_H
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#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
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#include <asm/ptrace.h>
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#ifdef CONFIG_ISA_ARCOMPACT
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/* These DPFP regs need to be saved/restored across ctx-sw */
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struct arc_fpu {
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struct {
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unsigned int l, h;
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} aux_dpfp[2];
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};
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#define fpu_init_task(regs)
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#else
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/*
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* ARCv2 FPU Control aux register
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* - bits to enable Traps on Exceptions
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* - Rounding mode
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*
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* ARCv2 FPU Status aux register
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* - FPU exceptions flags (Inv, Div-by-Zero, overflow, underflow, inexact)
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* - Flag Write Enable to clear flags explicitly (vs. by fpu instructions
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* only
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*/
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struct arc_fpu {
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unsigned int ctrl, status;
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};
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extern void fpu_init_task(struct pt_regs *regs);
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#endif /* !CONFIG_ISA_ARCOMPACT */
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struct task_struct;
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extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
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#else /* !CONFIG_ARC_FPU_SAVE_RESTORE */
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#define fpu_save_restore(p, n)
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#define fpu_init_task(regs)
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#endif /* CONFIG_ARC_FPU_SAVE_RESTORE */
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#endif /* _ASM_ARC_FPU_H */
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