239 lines
6.3 KiB
C
239 lines
6.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_MATH_LIBM_H_
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#define COSMOPOLITAN_LIBC_MATH_LIBM_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#include "libc/math/math.h"
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asm(".ident\t\"\\n\\n\
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libm (MIT License)\\n\
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Copyright 2017-2018 Arm Limited\\n\
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Copyright 2005-2019 Rich Felker\\n\
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Copyright 2008-2011, Bruce D. Evans, Steven G. Kargl, David Schultz\\n\
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Copyright 2008 Stephen L. Moshier <steve@moshier.net>\\n\
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Copyright 1993 Sun Microsystems\"");
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asm(".include \"libc/disclaimer.inc\"");
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#define weak __attribute__((__weak__))
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#define hidden __attribute__((__visibility__("hidden")))
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#define weak_alias(old, new) \
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extern __typeof(old) new __attribute__((__weak__, __alias__(#old)))
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#define __BYTE_ORDER __BYTE_ORDER__
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#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
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union ldshape {
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long double f;
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struct {
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uint64_t m;
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uint16_t se;
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} i;
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};
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/* Support non-nearest rounding mode. */
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#define WANT_ROUNDING 1
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/* Support signaling NaNs. */
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#define WANT_SNAN 0
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#if WANT_SNAN
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#error SNaN is unsupported
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#else
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#define issignalingf_inline(x) 0
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#define issignaling_inline(x) 0
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#endif
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#ifndef TOINT_INTRINSICS
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#define TOINT_INTRINSICS 0
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#endif
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/* Helps static branch prediction so hot path can be better optimized. */
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#define predict_true(x) __builtin_expect(!!(x), 1)
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#define predict_false(x) __builtin_expect(x, 0)
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/* Evaluate an expression as the specified type. With standard excess
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precision handling a type cast or assignment is enough (with
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-ffloat-store an assignment is required, in old compilers argument
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passing and return statement may not drop excess precision). */
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static inline float eval_as_float(float x) {
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float y = x;
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return y;
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}
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static inline double eval_as_double(double x) {
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double y = x;
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return y;
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}
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/* fp_barrier returns its input, but limits code transformations
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as if it had a side-effect (e.g. observable io) and returned
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an arbitrary value. */
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#ifndef fp_barrierf
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#define fp_barrierf fp_barrierf
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static inline float fp_barrierf(float x) {
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volatile float y = x;
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return y;
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}
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#endif
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#ifndef fp_barrier
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#define fp_barrier fp_barrier
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static inline double fp_barrier(double x) {
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volatile double y = x;
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return y;
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}
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#endif
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#ifndef fp_barrierl
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#define fp_barrierl fp_barrierl
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static inline long double fp_barrierl(long double x) {
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volatile long double y = x;
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return y;
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}
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#endif
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/* fp_force_eval ensures that the input value is computed when that's
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otherwise unused. To prevent the constant folding of the input
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expression, an additional fp_barrier may be needed or a compilation
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mode that does so (e.g. -frounding-math in gcc). Then it can be
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used to evaluate an expression for its fenv side-effects only. */
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#ifndef fp_force_evalf
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#define fp_force_evalf fp_force_evalf
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static inline void fp_force_evalf(float x) {
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volatile float y;
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y = x;
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}
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#endif
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#ifndef fp_force_eval
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#define fp_force_eval fp_force_eval
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static inline void fp_force_eval(double x) {
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volatile double y;
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y = x;
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}
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#endif
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#ifndef fp_force_evall
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#define fp_force_evall fp_force_evall
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static inline void fp_force_evall(long double x) {
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volatile long double y;
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y = x;
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}
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#endif
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#define FORCE_EVAL(x) \
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do { \
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if (sizeof(x) == sizeof(float)) { \
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fp_force_evalf(x); \
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} else if (sizeof(x) == sizeof(double)) { \
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fp_force_eval(x); \
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} else { \
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fp_force_evall(x); \
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} \
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} while (0)
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#define asuint(f) \
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((union { \
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float _f; \
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uint32_t _i; \
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}){f}) \
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._i
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#define asfloat(i) \
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((union { \
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uint32_t _i; \
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float _f; \
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}){i}) \
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._f
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#define asuint64(f) \
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((union { \
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double _f; \
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uint64_t _i; \
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}){f}) \
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._i
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#define asdouble(i) \
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((union { \
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uint64_t _i; \
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double _f; \
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}){i}) \
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._f
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#define EXTRACT_WORDS(hi, lo, d) \
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do { \
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uint64_t __u = asuint64(d); \
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(hi) = __u >> 32; \
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(lo) = (uint32_t)__u; \
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} while (0)
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#define GET_HIGH_WORD(hi, d) \
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do { \
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(hi) = asuint64(d) >> 32; \
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} while (0)
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#define GET_LOW_WORD(lo, d) \
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do { \
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(lo) = (uint32_t)asuint64(d); \
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} while (0)
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#define INSERT_WORDS(d, hi, lo) \
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do { \
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(d) = asdouble(((uint64_t)(hi) << 32) | (uint32_t)(lo)); \
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} while (0)
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#define SET_HIGH_WORD(d, hi) INSERT_WORDS(d, hi, (uint32_t)asuint64(d))
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#define SET_LOW_WORD(d, lo) INSERT_WORDS(d, asuint64(d) >> 32, lo)
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#define GET_FLOAT_WORD(w, d) \
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do { \
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(w) = asuint(d); \
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} while (0)
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#define SET_FLOAT_WORD(d, w) \
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do { \
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(d) = asfloat(w); \
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} while (0)
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hidden int __rem_pio2_large(double *, double *, int, int, int);
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hidden int __rem_pio2(double, double *);
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hidden double __sin(double, double, int);
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hidden double __cos(double, double);
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hidden double __tan(double, double, int);
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hidden double __expo2(double);
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hidden int __rem_pio2f(float, double *);
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hidden float __sindf(double);
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hidden float __cosdf(double);
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hidden float __tandf(double, int);
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hidden float __expo2f(float);
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hidden int __rem_pio2l(long double, long double *);
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hidden long double __sinl(long double, long double, int);
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hidden long double __cosl(long double, long double);
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hidden long double __tanl(long double, long double, int);
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hidden long double __polevll(long double, const long double *, int);
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hidden long double __p1evll(long double, const long double *, int);
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extern int __signgam;
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hidden double __lgamma_r(double, int *);
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hidden float __lgammaf_r(float, int *);
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/* error handling functions */
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hidden float __math_xflowf(uint32_t, float);
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hidden float __math_uflowf(uint32_t);
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hidden float __math_oflowf(uint32_t);
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hidden float __math_divzerof(uint32_t);
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hidden float __math_invalidf(float);
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hidden double __math_xflow(uint32_t, double);
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hidden double __math_uflow(uint32_t);
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hidden double __math_oflow(uint32_t);
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hidden double __math_divzero(uint32_t);
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hidden double __math_invalid(double);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_MATH_LIBM_H_ */
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