double.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:4k
- /*
- * BK Id: SCCS/s.double.h 1.5 05/17/01 18:14:22 cort
- */
- /*
- * Definitions for IEEE Double Precision
- */
- #if _FP_W_TYPE_SIZE < 32
- #error "Here's a nickel kid. Go buy yourself a real computer."
- #endif
- #if _FP_W_TYPE_SIZE < 64
- #define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
- #else
- #define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
- #endif
- #define _FP_FRACBITS_D 53
- #define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
- #define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
- #define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
- #define _FP_EXPBITS_D 11
- #define _FP_EXPBIAS_D 1023
- #define _FP_EXPMAX_D 2047
- #define _FP_QNANBIT_D
- ((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE))
- #define _FP_IMPLBIT_D
- ((_FP_W_TYPE)1 << ((_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE))
- #define _FP_OVERFLOW_D
- ((_FP_W_TYPE)1 << (_FP_WFRACBITS_D % _FP_W_TYPE_SIZE))
- #if _FP_W_TYPE_SIZE < 64
- union _FP_UNION_D
- {
- double flt;
- struct {
- #if __BYTE_ORDER == __BIG_ENDIAN
- unsigned sign : 1;
- unsigned exp : _FP_EXPBITS_D;
- unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
- unsigned frac0 : _FP_W_TYPE_SIZE;
- #else
- unsigned frac0 : _FP_W_TYPE_SIZE;
- unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
- unsigned exp : _FP_EXPBITS_D;
- unsigned sign : 1;
- #endif
- } bits __attribute__((packed));
- };
- #define FP_DECL_D(X) _FP_DECL(2,X)
- #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
- #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
- #define FP_UNPACK_D(X,val)
- do {
- _FP_UNPACK_RAW_2(D,X,val);
- _FP_UNPACK_CANONICAL(D,2,X);
- } while (0)
- #define FP_PACK_D(val,X)
- do {
- _FP_PACK_CANONICAL(D,2,X);
- _FP_PACK_RAW_2(D,val,X);
- } while (0)
- #define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
- #define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
- #define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
- #define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
- #define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
- #define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
- #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
- #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)
- #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
- #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)
- #else
- union _FP_UNION_D
- {
- double flt;
- struct {
- #if __BYTE_ORDER == __BIG_ENDIAN
- unsigned sign : 1;
- unsigned exp : _FP_EXPBITS_D;
- unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
- #else
- unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
- unsigned exp : _FP_EXPBITS_D;
- unsigned sign : 1;
- #endif
- } bits __attribute__((packed));
- };
- #define FP_DECL_D(X) _FP_DECL(1,X)
- #define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
- #define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
- #define FP_UNPACK_D(X,val)
- do {
- _FP_UNPACK_RAW_1(D,X,val);
- _FP_UNPACK_CANONICAL(D,1,X);
- } while (0)
- #define FP_PACK_D(val,X)
- do {
- _FP_PACK_CANONICAL(D,1,X);
- _FP_PACK_RAW_1(D,val,X);
- } while (0)
- #define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
- #define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
- #define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
- #define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
- #define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
- #define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
- /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
- the target machine. */
- #define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
- #define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)
- #define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
- #define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)
- #endif /* W_TYPE_SIZE < 64 */