single.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:2k
- /*
- * BK Id: SCCS/s.single.h 1.5 05/17/01 18:14:23 cort
- */
- /*
- * Definitions for IEEE Single Precision
- */
- #if _FP_W_TYPE_SIZE < 32
- #error "Here's a nickel kid. Go buy yourself a real computer."
- #endif
- #define _FP_FRACBITS_S 24
- #define _FP_FRACXBITS_S (_FP_W_TYPE_SIZE - _FP_FRACBITS_S)
- #define _FP_WFRACBITS_S (_FP_WORKBITS + _FP_FRACBITS_S)
- #define _FP_WFRACXBITS_S (_FP_W_TYPE_SIZE - _FP_WFRACBITS_S)
- #define _FP_EXPBITS_S 8
- #define _FP_EXPBIAS_S 127
- #define _FP_EXPMAX_S 255
- #define _FP_QNANBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-2))
- #define _FP_IMPLBIT_S ((_FP_W_TYPE)1 << (_FP_FRACBITS_S-1))
- #define _FP_OVERFLOW_S ((_FP_W_TYPE)1 << (_FP_WFRACBITS_S))
- /* The implementation of _FP_MUL_MEAT_S and _FP_DIV_MEAT_S should be
- chosen by the target machine. */
- union _FP_UNION_S
- {
- float flt;
- struct {
- #if __BYTE_ORDER == __BIG_ENDIAN
- unsigned sign : 1;
- unsigned exp : _FP_EXPBITS_S;
- unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
- #else
- unsigned frac : _FP_FRACBITS_S - (_FP_IMPLBIT_S != 0);
- unsigned exp : _FP_EXPBITS_S;
- unsigned sign : 1;
- #endif
- } bits __attribute__((packed));
- };
- #define FP_DECL_S(X) _FP_DECL(1,X)
- #define FP_UNPACK_RAW_S(X,val) _FP_UNPACK_RAW_1(S,X,val)
- #define FP_PACK_RAW_S(val,X) _FP_PACK_RAW_1(S,val,X)
- #define FP_UNPACK_S(X,val)
- do {
- _FP_UNPACK_RAW_1(S,X,val);
- _FP_UNPACK_CANONICAL(S,1,X);
- } while (0)
- #define FP_PACK_S(val,X)
- do {
- _FP_PACK_CANONICAL(S,1,X);
- _FP_PACK_RAW_1(S,val,X);
- } while (0)
- #define FP_NEG_S(R,X) _FP_NEG(S,1,R,X)
- #define FP_ADD_S(R,X,Y) _FP_ADD(S,1,R,X,Y)
- #define FP_SUB_S(R,X,Y) _FP_SUB(S,1,R,X,Y)
- #define FP_MUL_S(R,X,Y) _FP_MUL(S,1,R,X,Y)
- #define FP_DIV_S(R,X,Y) _FP_DIV(S,1,R,X,Y)
- #define FP_SQRT_S(R,X) _FP_SQRT(S,1,R,X)
- #define FP_CMP_S(r,X,Y,un) _FP_CMP(S,1,r,X,Y,un)
- #define FP_CMP_EQ_S(r,X,Y) _FP_CMP_EQ(S,1,r,X,Y)
- #define FP_TO_INT_S(r,X,rsz,rsg) _FP_TO_INT(S,1,r,X,rsz,rsg)
- #define FP_FROM_INT_S(X,r,rs,rt) _FP_FROM_INT(S,1,X,r,rs,rt)