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 /* Support non-nearest rounding mode. */
63 #define WANT_ROUNDING 1
64 /* Support signaling NaNs. */
67 /* Helps static branch prediction so hot path can be better optimized. */
69 #define predict_true(x) __builtin_expect(!!(x), 1)
70 #define predict_false(x) __builtin_expect(x, 0)
72 #define predict_true(x) (x)
73 #define predict_false(x) (x)
76 /* Evaluate an expression as the specified type. With standard excess
77 precision handling a type cast or assignment is enough (with
78 -ffloat-store an assignment is required, in old compilers argument
79 passing and return statement may not drop excess precision). */
81 static inline float eval_as_float(float x)
87 static inline double eval_as_double(double x)
93 /* fp_barrier returns its input, but limits code transformations
94 as if it had a side-effect (e.g. observable io) and returned
95 an arbitrary value. */
98 #define fp_barrierf fp_barrierf
99 static inline float fp_barrierf(float x)
101 volatile float y = x;
107 #define fp_barrier fp_barrier
108 static inline double fp_barrier(double x)
110 volatile double y = x;
116 #define fp_barrierl fp_barrierl
117 static inline long double fp_barrierl(long double x)
119 volatile long double y = x;
124 /* fp_force_eval ensures that the input value is computed when that's
125 otherwise unused. To prevent the constant folding of the input
126 expression, an additional fp_barrier may be needed or a compilation
127 mode that does so (e.g. -frounding-math in gcc). Then it can be
128 used to evaluate an expression for its fenv side-effects only. */
130 #ifndef fp_force_evalf
131 #define fp_force_evalf fp_force_evalf
132 static inline void fp_force_evalf(float x)
134 volatile float y = x;
138 #ifndef fp_force_eval
139 #define fp_force_eval fp_force_eval
140 static inline void fp_force_eval(double x)
142 volatile double y = x;
146 #ifndef fp_force_evall
147 #define fp_force_evall fp_force_evall
148 static inline void fp_force_evall(long double x)
150 volatile long double y = x;
154 #define FORCE_EVAL(x) do { \
155 if (sizeof(x) == sizeof(float)) { \
157 } else if (sizeof(x) == sizeof(double)) { \
164 #define asuint(f) ((union{float _f; uint32_t _i;}){f})._i
165 #define asfloat(i) ((union{uint32_t _i; float _f;}){i})._f
166 #define asuint64(f) ((union{double _f; uint64_t _i;}){f})._i
167 #define asdouble(i) ((union{uint64_t _i; double _f;}){i})._f
169 #define EXTRACT_WORDS(hi,lo,d) \
171 uint64_t __u = asuint64(d); \
173 (lo) = (uint32_t)__u; \
176 #define GET_HIGH_WORD(hi,d) \
178 (hi) = asuint64(d) >> 32; \
181 #define GET_LOW_WORD(lo,d) \
183 (lo) = (uint32_t)asuint64(d); \
186 #define INSERT_WORDS(d,hi,lo) \
188 (d) = asdouble(((uint64_t)(hi)<<32) | (uint32_t)(lo)); \
191 #define SET_HIGH_WORD(d,hi) \
192 INSERT_WORDS(d, hi, (uint32_t)asuint64(d))
194 #define SET_LOW_WORD(d,lo) \
195 INSERT_WORDS(d, asuint64(d)>>32, lo)
197 #define GET_FLOAT_WORD(w,d) \
202 #define SET_FLOAT_WORD(d,w) \
207 hidden int __rem_pio2_large(double*,double*,int,int,int);
209 hidden int __rem_pio2(double,double*);
210 hidden double __sin(double,double,int);
211 hidden double __cos(double,double);
212 hidden double __tan(double,double,int);
213 hidden double __expo2(double);
215 hidden int __rem_pio2f(float,double*);
216 hidden float __sindf(double);
217 hidden float __cosdf(double);
218 hidden float __tandf(double,int);
219 hidden float __expo2f(float);
221 hidden int __rem_pio2l(long double, long double *);
222 hidden long double __sinl(long double, long double, int);
223 hidden long double __cosl(long double, long double);
224 hidden long double __tanl(long double, long double, int);
226 hidden long double __polevll(long double, const long double *, int);
227 hidden long double __p1evll(long double, const long double *, int);
229 extern int __signgam;
230 hidden double __lgamma_r(double, int *);
231 hidden float __lgammaf_r(float, int *);
233 /* error handling functions */
234 hidden float __math_xflowf(uint32_t, float);
235 hidden float __math_uflowf(uint32_t);
236 hidden float __math_oflowf(uint32_t);
237 hidden float __math_divzerof(uint32_t);
238 hidden float __math_invalidf(float);
239 hidden double __math_xflow(uint32_t, double);
240 hidden double __math_uflow(uint32_t);
241 hidden double __math_oflow(uint32_t);
242 hidden double __math_divzero(uint32_t);
243 hidden double __math_invalid(double);