root/arch/csky/abiv2/inc/abi/fpu.h

INCLUDED FROM

DEFINITIONS

1. init_fpu

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3 
   4 #ifndef __ASM_CSKY_FPU_H
   5 #define __ASM_CSKY_FPU_H
   6 
   7 #include <asm/sigcontext.h>
   8 #include <asm/ptrace.h>
   9 
  10 int fpu_libc_helper(struct pt_regs *regs);
  11 void fpu_fpe(struct pt_regs *regs);
  12 
  13 static inline void init_fpu(void) { mtcr("cr<1, 2>", 0); }
  14 
  15 void save_to_user_fp(struct user_fp *user_fp);
  16 void restore_from_user_fp(struct user_fp *user_fp);
  17 
  18 /*
  19  * Define the fesr bit for fpe handle.
  20  */
  21 #define  FPE_ILLE  (1 << 16)    /* Illegal instruction  */
  22 #define  FPE_FEC   (1 << 7)     /* Input float-point arithmetic exception */
  23 #define  FPE_IDC   (1 << 5)     /* Input denormalized exception */
  24 #define  FPE_IXC   (1 << 4)     /* Inexact exception */
  25 #define  FPE_UFC   (1 << 3)     /* Underflow exception */
  26 #define  FPE_OFC   (1 << 2)     /* Overflow exception */
  27 #define  FPE_DZC   (1 << 1)     /* Divide by zero exception */
  28 #define  FPE_IOC   (1 << 0)     /* Invalid operation exception */
  29 #define  FPE_REGULAR_EXCEPTION (FPE_IXC | FPE_UFC | FPE_OFC | FPE_DZC | FPE_IOC)
  30 
  31 #ifdef CONFIG_OPEN_FPU_IDE
  32 #define IDE_STAT   (1 << 5)
  33 #else
  34 #define IDE_STAT   0
  35 #endif
  36 
  37 #ifdef CONFIG_OPEN_FPU_IXE
  38 #define IXE_STAT   (1 << 4)
  39 #else
  40 #define IXE_STAT   0
  41 #endif
  42 
  43 #ifdef CONFIG_OPEN_FPU_UFE
  44 #define UFE_STAT   (1 << 3)
  45 #else
  46 #define UFE_STAT   0
  47 #endif
  48 
  49 #ifdef CONFIG_OPEN_FPU_OFE
  50 #define OFE_STAT   (1 << 2)
  51 #else
  52 #define OFE_STAT   0
  53 #endif
  54 
  55 #ifdef CONFIG_OPEN_FPU_DZE
  56 #define DZE_STAT   (1 << 1)
  57 #else
  58 #define DZE_STAT   0
  59 #endif
  60 
  61 #ifdef CONFIG_OPEN_FPU_IOE
  62 #define IOE_STAT   (1 << 0)
  63 #else
  64 #define IOE_STAT   0
  65 #endif
  66 
  67 #endif /* __ASM_CSKY_FPU_H */