cop1.h

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#ifndef __LIBDRAGON_COP1_H
#define __LIBDRAGON_COP1_H
 
/* COP1 Control/Status bits definition. Please refer to MIPS R4300 manual. */
#define C1_FLAG_INEXACT_OP          0x00000004         
#define C1_FLAG_UNDERFLOW           0x00000008         
#define C1_FLAG_OVERFLOW            0x00000010         
#define C1_FLAG_DIV_BY_0            0x00000020         
#define C1_FLAG_INVALID_OP          0x00000040         
 
#define C1_ENABLE_INEXACT_OP        0x00000080         
#define C1_ENABLE_UNDERFLOW         0x00000100         
#define C1_ENABLE_OVERFLOW          0x00000200         
#define C1_ENABLE_DIV_BY_0          0x00000400         
#define C1_ENABLE_INVALID_OP        0x00000800         
#define C1_ENABLE_MASK              0x00000F80         
 
#define C1_CAUSE_INEXACT_OP         0x00001000         
#define C1_CAUSE_UNDERFLOW          0x00002000         
#define C1_CAUSE_OVERFLOW           0x00004000         
#define C1_CAUSE_DIV_BY_0           0x00008000         
#define C1_CAUSE_INVALID_OP         0x00010000         
#define C1_CAUSE_NOT_IMPLEMENTED    0x00020000         
#define C1_CAUSE_MASK               0x0003F000         
 
#define C1_FCR31_FS                 (1<<24)            
 
#define C1_FCR31() ({ \
    uint32_t x; \
    asm volatile("cfc1 %0,$f31":"=r"(x)); \
    x; \
})
 
#define C1_WRITE_FCR31(x) ({ \
    asm volatile("ctc1 %0,$f31"::"r"(x)); \
})
 
#endif