10 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
11 #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
19 #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN
20 /* This is the m68k variant of 80-bit long double, and this definition only works
21 * on archs where the alignment requirement of uint64_t is <= 4. */
30 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __LITTLE_ENDIAN
44 #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384 && __BYTE_ORDER == __BIG_ENDIAN
59 #error Unsupported long double representation
62 /* Evaluate an expression as the specified type. With standard excess
63 precision handling a type cast or assignment is enough (with
64 -ffloat-store an assignment is required, in old compilers argument
65 passing and return statement may not drop excess precision). */
67 static inline float eval_as_float(float x)
73 static inline double eval_as_double(double x)
79 /* fp_barrier returns its input, but limits code transformations
80 as if it had a side-effect (e.g. observable io) and returned
81 an arbitrary value. */
84 #define fp_barrierf fp_barrierf
85 static inline float fp_barrierf(float x)
93 #define fp_barrier fp_barrier
94 static inline double fp_barrier(double x)
96 volatile double y = x;
102 #define fp_barrierl fp_barrierl
103 static inline long double fp_barrierl(long double x)
105 volatile long double y = x;
110 /* fp_force_eval ensures that the input value is computed when that's
111 otherwise unused. To prevent the constant folding of the input
112 expression, an additional fp_barrier may be needed or a compilation
113 mode that does so (e.g. -frounding-math in gcc). Then it can be
114 used to evaluate an expression for its fenv side-effects only. */
116 #ifndef fp_force_evalf
117 #define fp_force_evalf fp_force_evalf
118 static inline void fp_force_evalf(float x)
120 volatile float y = x;
124 #ifndef fp_force_eval
125 #define fp_force_eval fp_force_eval
126 static inline void fp_force_eval(double x)
128 volatile double y = x;
132 #ifndef fp_force_evall
133 #define fp_force_evall fp_force_evall
134 static inline void fp_force_evall(long double x)
136 volatile long double y = x;
140 #define FORCE_EVAL(x) do { \
141 if (sizeof(x) == sizeof(float)) { \
143 } else if (sizeof(x) == sizeof(double)) { \
150 #define asuint(f) ((union{float _f; uint32_t _i;}){f})._i
151 #define asfloat(i) ((union{uint32_t _i; float _f;}){i})._f
152 #define asuint64(f) ((union{double _f; uint64_t _i;}){f})._i
153 #define asdouble(i) ((union{uint64_t _i; double _f;}){i})._f
155 #define EXTRACT_WORDS(hi,lo,d) \
157 uint64_t __u = asuint64(d); \
159 (lo) = (uint32_t)__u; \
162 #define GET_HIGH_WORD(hi,d) \
164 (hi) = asuint64(d) >> 32; \
167 #define GET_LOW_WORD(lo,d) \
169 (lo) = (uint32_t)asuint64(d); \
172 #define INSERT_WORDS(d,hi,lo) \
174 (d) = asdouble(((uint64_t)(hi)<<32) | (uint32_t)(lo)); \
177 #define SET_HIGH_WORD(d,hi) \
178 INSERT_WORDS(d, hi, (uint32_t)asuint64(d))
180 #define SET_LOW_WORD(d,lo) \
181 INSERT_WORDS(d, asuint64(d)>>32, lo)
183 #define GET_FLOAT_WORD(w,d) \
188 #define SET_FLOAT_WORD(d,w) \
193 hidden int __rem_pio2_large(double*,double*,int,int,int);
195 hidden int __rem_pio2(double,double*);
196 hidden double __sin(double,double,int);
197 hidden double __cos(double,double);
198 hidden double __tan(double,double,int);
199 hidden double __expo2(double);
201 hidden int __rem_pio2f(float,double*);
202 hidden float __sindf(double);
203 hidden float __cosdf(double);
204 hidden float __tandf(double,int);
205 hidden float __expo2f(float);
207 hidden int __rem_pio2l(long double, long double *);
208 hidden long double __sinl(long double, long double, int);
209 hidden long double __cosl(long double, long double);
210 hidden long double __tanl(long double, long double, int);
212 hidden long double __polevll(long double, const long double *, int);
213 hidden long double __p1evll(long double, const long double *, int);
215 extern int __signgam;
216 hidden double __lgamma_r(double, int *);
217 hidden float __lgammaf_r(float, int *);
219 /* error handling functions */
220 hidden float __math_xflowf(uint32_t, float);
221 hidden float __math_uflowf(uint32_t);
222 hidden float __math_oflowf(uint32_t);
223 hidden float __math_divzerof(uint32_t);
224 hidden float __math_invalidf(float);
225 hidden double __math_xflow(uint32_t, double);
226 hidden double __math_uflow(uint32_t);
227 hidden double __math_oflow(uint32_t);
228 hidden double __math_divzero(uint32_t);
229 hidden double __math_invalid(double);