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| 2 | |
| 3 | * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
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| 4 | *
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| 5 |
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| 6 |
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| 7 | #ifndef _ASM_ARC_FPU_H
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| 8 | #define _ASM_ARC_FPU_H
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| 9 |
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| 10 | #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
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| 11 |
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| 12 | #include <asm/ptrace.h>
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| 13 |
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| 14 | #ifdef CONFIG_ISA_ARCOMPACT
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| 15 |
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| 16 |
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| 17 | struct arc_fpu {
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| 18 | struct {
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| 19 | unsigned int l, h;
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| 20 | } aux_dpfp[2];
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| 21 | };
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| 22 |
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| 23 | #define fpu_init_task(regs)
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| 24 |
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| 25 | #else
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| 26 |
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| 27 | |
| 28 | * ARCv2 FPU Control aux register
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| 29 | * - bits to enable Traps on Exceptions
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| 30 | * - Rounding mode
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| 31 | *
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| 32 | * ARCv2 FPU Status aux register
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| 33 | * - FPU exceptions flags (Inv, Div-by-Zero, overflow, underflow, inexact)
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| 34 | * - Flag Write Enable to clear flags explicitly (vs. by fpu instructions
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| 35 | * only
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| 36 |
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| 37 |
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| 38 | struct arc_fpu {
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| 39 | unsigned int ctrl, status;
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| 40 | };
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| 41 |
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| 42 | extern void fpu_init_task(struct pt_regs *regs);
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| 43 |
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| 44 | #endif
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| 45 |
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| 46 | struct task_struct;
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| 47 |
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| 48 | extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
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| 49 |
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| 50 | #else
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| 51 |
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| 52 | #define fpu_save_restore(p, n)
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| 53 | #define fpu_init_task(regs)
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| 54 |
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| 55 | #endif
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| 56 |
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| 57 | #endif
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