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

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