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xianfeng |
/*
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* Definitions for IEEE Double Precision
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*/
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#if _FP_W_TYPE_SIZE < 32
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#error "Here's a nickel kid. Go buy yourself a real computer."
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#endif
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#if _FP_W_TYPE_SIZE < 64
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#define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
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#else
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#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
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#endif
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#define _FP_FRACBITS_D 53
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#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
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#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
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#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
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#define _FP_EXPBITS_D 11
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#define _FP_EXPBIAS_D 1023
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#define _FP_EXPMAX_D 2047
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#define _FP_QNANBIT_D \
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((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE))
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#define _FP_IMPLBIT_D \
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((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE))
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#define _FP_OVERFLOW_D \
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((_FP_W_TYPE)1 << (_FP_WFRACBITS_D % _FP_W_TYPE_SIZE))
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#if _FP_W_TYPE_SIZE < 64
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union _FP_UNION_D
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{
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double flt;
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struct {
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sign : 1;
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unsigned exp : _FP_EXPBITS_D;
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unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
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unsigned frac0 : _FP_W_TYPE_SIZE;
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#else
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unsigned frac0 : _FP_W_TYPE_SIZE;
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unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
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unsigned exp : _FP_EXPBITS_D;
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unsigned sign : 1;
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#endif
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} bits __attribute__((packed));
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};
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#define FP_DECL_D(X) _FP_DECL(2,X)
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#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
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#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
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#define FP_UNPACK_D(X,val) \
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do { \
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_FP_UNPACK_RAW_2(D,X,val); \
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_FP_UNPACK_CANONICAL(D,2,X); \
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} while (0)
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#define FP_PACK_D(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,2,X); \
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_FP_PACK_RAW_2(D,val,X); \
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} while (0)
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#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
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#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
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#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
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#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
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#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
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#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
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#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
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#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
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#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
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#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
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#else
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union _FP_UNION_D
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{
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double flt;
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struct {
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned sign : 1;
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unsigned exp : _FP_EXPBITS_D;
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unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
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#else
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unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
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unsigned exp : _FP_EXPBITS_D;
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unsigned sign : 1;
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#endif
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} bits __attribute__((packed));
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};
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#define FP_DECL_D(X) _FP_DECL(1,X)
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#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
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#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
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#define FP_UNPACK_D(X,val) \
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do { \
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_FP_UNPACK_RAW_1(D,X,val); \
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_FP_UNPACK_CANONICAL(D,1,X); \
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} while (0)
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#define FP_PACK_D(val,X) \
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do { \
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_FP_PACK_CANONICAL(D,1,X); \
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_FP_PACK_RAW_1(D,val,X); \
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} while (0)
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#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
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#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
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#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
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#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
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#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
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#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
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/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
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the target machine. */
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#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
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#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
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#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
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#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
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#endif /* W_TYPE_SIZE < 64 */
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