minix/common/include/arch/i386/fpu.h

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#ifndef FPU_H
#define FPU_H
/* x87 FPU state, MMX Technolodgy.
* 108 bytes.*/
struct fpu_regs_s {
u16_t fp_control; /* control */
u16_t fp_unused_1;
u16_t fp_status; /* status */
u16_t fp_unused_2;
u16_t fp_tag; /* register tags */
u16_t fp_unused_3;
u32_t fp_eip; /* eip at failed instruction */
u16_t fp_cs; /* cs at failed instruction */
u16_t fp_opcode; /* opcode of failed instruction */
u32_t fp_dp; /* data address */
u16_t fp_ds; /* data segment */
u16_t fp_unused_4;
u16_t fp_st_regs[8][5]; /* 8 80-bit FP registers */
};
/* x87 FPU, MMX Technolodgy and SSE state.
* 512 bytes (if you need size use FPU_XFP_SIZE). */
struct xfp_save {
u16_t fp_control; /* control */
u16_t fp_status; /* status */
u16_t fp_tag; /* register tags */
u16_t fp_opcode; /* opcode of failed instruction */
u32_t fp_eip; /* eip at failed instruction */
u16_t fp_cs; /* cs at failed instruction */
u16_t fp_unused_1;
u32_t fp_dp; /* data address */
u16_t fp_ds; /* data segment */
u16_t fp_unused_2;
u32_t fp_mxcsr; /* MXCSR */
u32_t fp_mxcsr_mask; /* MXCSR_MASK */
u16_t fp_st_regs[8][8]; /* 128 bytes for ST/MM regs */
u32_t fp_xreg_word[32]; /* space for 8 128-bit XMM registers */
u32_t fp_padding[56];
};
/* Size of xfp_save structure. */
#define FPU_XFP_SIZE 512
union fpu_state_u {
struct fpu_regs_s fpu_regs;
struct xfp_save xfp_regs;
};
#endif /* #ifndef FPU_H */