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. */
68 #error SNaN is unsupported
70 #define issignalingf_inline(x) 0
73 #ifndef TOINT_INTRINSICS
74 #define TOINT_INTRINSICS 0
78 /* Round x to nearest int in all rounding modes, ties have to be rounded
79 consistently with converttoint so the results match. If the result
80 would be outside of [-2^31, 2^31-1] then the semantics is unspecified. */
81 static double_t roundtoint(double_t);
83 /* Convert x to nearest int in all rounding modes, ties have to be rounded
84 consistently with roundtoint. If the result is not representible in an
85 int32_t then the semantics is unspecified. */
86 static int32_t converttoint(double_t);
89 /* Helps static branch prediction so hot path can be better optimized. */
91 #define predict_true(x) __builtin_expect(!!(x), 1)
92 #define predict_false(x) __builtin_expect(x, 0)
94 #define predict_true(x) (x)
95 #define predict_false(x) (x)
98 /* Evaluate an expression as the specified type. With standard excess
99 precision handling a type cast or assignment is enough (with
100 -ffloat-store an assignment is required, in old compilers argument
101 passing and return statement may not drop excess precision). */
103 static inline float eval_as_float(float x)
109 static inline double eval_as_double(double x)
115 /* fp_barrier returns its input, but limits code transformations
116 as if it had a side-effect (e.g. observable io) and returned
117 an arbitrary value. */
120 #define fp_barrierf fp_barrierf
121 static inline float fp_barrierf(float x)
123 volatile float y = x;
129 #define fp_barrier fp_barrier
130 static inline double fp_barrier(double x)
132 volatile double y = x;
138 #define fp_barrierl fp_barrierl
139 static inline long double fp_barrierl(long double x)
141 volatile long double y = x;
146 /* fp_force_eval ensures that the input value is computed when that's
147 otherwise unused. To prevent the constant folding of the input
148 expression, an additional fp_barrier may be needed or a compilation
149 mode that does so (e.g. -frounding-math in gcc). Then it can be
150 used to evaluate an expression for its fenv side-effects only. */
152 #ifndef fp_force_evalf
153 #define fp_force_evalf fp_force_evalf
154 static inline void fp_force_evalf(float x)
156 volatile float y = x;
160 #ifndef fp_force_eval
161 #define fp_force_eval fp_force_eval
162 static inline void fp_force_eval(double x)
164 volatile double y = x;
168 #ifndef fp_force_evall
169 #define fp_force_evall fp_force_evall
170 static inline void fp_force_evall(long double x)
172 volatile long double y = x;
176 #define FORCE_EVAL(x) do { \
177 if (sizeof(x) == sizeof(float)) { \
179 } else if (sizeof(x) == sizeof(double)) { \
186 #define asuint(f) ((union{float _f; uint32_t _i;}){f})._i
187 #define asfloat(i) ((union{uint32_t _i; float _f;}){i})._f
188 #define asuint64(f) ((union{double _f; uint64_t _i;}){f})._i
189 #define asdouble(i) ((union{uint64_t _i; double _f;}){i})._f
191 #define EXTRACT_WORDS(hi,lo,d) \
193 uint64_t __u = asuint64(d); \
195 (lo) = (uint32_t)__u; \
198 #define GET_HIGH_WORD(hi,d) \
200 (hi) = asuint64(d) >> 32; \
203 #define GET_LOW_WORD(lo,d) \
205 (lo) = (uint32_t)asuint64(d); \
208 #define INSERT_WORDS(d,hi,lo) \
210 (d) = asdouble(((uint64_t)(hi)<<32) | (uint32_t)(lo)); \
213 #define SET_HIGH_WORD(d,hi) \
214 INSERT_WORDS(d, hi, (uint32_t)asuint64(d))
216 #define SET_LOW_WORD(d,lo) \
217 INSERT_WORDS(d, asuint64(d)>>32, lo)
219 #define GET_FLOAT_WORD(w,d) \
224 #define SET_FLOAT_WORD(d,w) \
229 hidden int __rem_pio2_large(double*,double*,int,int,int);
231 hidden int __rem_pio2(double,double*);
232 hidden double __sin(double,double,int);
233 hidden double __cos(double,double);
234 hidden double __tan(double,double,int);
235 hidden double __expo2(double);
237 hidden int __rem_pio2f(float,double*);
238 hidden float __sindf(double);
239 hidden float __cosdf(double);
240 hidden float __tandf(double,int);
241 hidden float __expo2f(float);
243 hidden int __rem_pio2l(long double, long double *);
244 hidden long double __sinl(long double, long double, int);
245 hidden long double __cosl(long double, long double);
246 hidden long double __tanl(long double, long double, int);
248 hidden long double __polevll(long double, const long double *, int);
249 hidden long double __p1evll(long double, const long double *, int);
251 extern int __signgam;
252 hidden double __lgamma_r(double, int *);
253 hidden float __lgammaf_r(float, int *);
255 /* error handling functions */
256 hidden float __math_xflowf(uint32_t, float);
257 hidden float __math_uflowf(uint32_t);
258 hidden float __math_oflowf(uint32_t);
259 hidden float __math_divzerof(uint32_t);
260 hidden float __math_invalidf(float);
261 hidden double __math_xflow(uint32_t, double);
262 hidden double __math_uflow(uint32_t);
263 hidden double __math_oflow(uint32_t);
264 hidden double __math_divzero(uint32_t);
265 hidden double __math_invalid(double);