diff options
Diffstat (limited to 'arch/csky/abiv2/inc/abi/fpu.h')
| -rw-r--r-- | arch/csky/abiv2/inc/abi/fpu.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/csky/abiv2/inc/abi/fpu.h b/arch/csky/abiv2/inc/abi/fpu.h new file mode 100644 index 000000000..aabb79355 --- /dev/null +++ b/arch/csky/abiv2/inc/abi/fpu.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_CSKY_FPU_H +#define __ASM_CSKY_FPU_H + +#include <asm/sigcontext.h> +#include <asm/ptrace.h> + +int fpu_libc_helper(struct pt_regs *regs); +void fpu_fpe(struct pt_regs *regs); + +static inline void init_fpu(void) { mtcr("cr<1, 2>", 0); } + +void save_to_user_fp(struct user_fp *user_fp); +void restore_from_user_fp(struct user_fp *user_fp); + +/* + * Define the fesr bit for fpe handle. + */ +#define FPE_ILLE (1 << 16) /* Illegal instruction */ +#define FPE_FEC (1 << 7) /* Input float-point arithmetic exception */ +#define FPE_IDC (1 << 5) /* Input denormalized exception */ +#define FPE_IXC (1 << 4) /* Inexact exception */ +#define FPE_UFC (1 << 3) /* Underflow exception */ +#define FPE_OFC (1 << 2) /* Overflow exception */ +#define FPE_DZC (1 << 1) /* Divide by zero exception */ +#define FPE_IOC (1 << 0) /* Invalid operation exception */ +#define FPE_REGULAR_EXCEPTION (FPE_IXC | FPE_UFC | FPE_OFC | FPE_DZC | FPE_IOC) + +#ifdef CONFIG_OPEN_FPU_IDE +#define IDE_STAT (1 << 5) +#else +#define IDE_STAT 0 +#endif + +#ifdef CONFIG_OPEN_FPU_IXE +#define IXE_STAT (1 << 4) +#else +#define IXE_STAT 0 +#endif + +#ifdef CONFIG_OPEN_FPU_UFE +#define UFE_STAT (1 << 3) +#else +#define UFE_STAT 0 +#endif + +#ifdef CONFIG_OPEN_FPU_OFE +#define OFE_STAT (1 << 2) +#else +#define OFE_STAT 0 +#endif + +#ifdef CONFIG_OPEN_FPU_DZE +#define DZE_STAT (1 << 1) +#else +#define DZE_STAT 0 +#endif + +#ifdef CONFIG_OPEN_FPU_IOE +#define IOE_STAT (1 << 0) +#else +#define IOE_STAT 0 +#endif + +#endif /* __ASM_CSKY_FPU_H */ |