#ifndef QUADMATH_IMP_H
#define QUADMATH_IMP_H
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include "quadmath.h"
#include "config.h"
+#ifdef HAVE_FENV_H
+# include <fenv.h>
+#endif
+
+
+/* Under IEEE 754, an architecture may determine tininess of
+ floating-point results either "before rounding" or "after
+ rounding", but must do so in the same way for all operations
+ returning binary results. Define TININESS_AFTER_ROUNDING to 1 for
+ "after rounding" architectures, 0 for "before rounding"
+ architectures. */
+
+#define TININESS_AFTER_ROUNDING 1
+#define HIGH_ORDER_BIT_IS_SET_FOR_SNAN 0
+
+#define FIX_FLT128_LONG_CONVERT_OVERFLOW 0
+#define FIX_FLT128_LLONG_CONVERT_OVERFLOW 0
/* Prototypes for internal functions. */
extern int32_t __quadmath_rem_pio2q (__float128, __float128 *);
__float128 *, int);
extern __float128 __quadmath_kernel_sinq (__float128, __float128, int);
extern __float128 __quadmath_kernel_cosq (__float128, __float128);
+extern __float128 __quadmath_kernel_tanq (__float128, __float128, int);
+extern __float128 __quadmath_gamma_productq (__float128, __float128, int,
+ __float128 *);
+extern __float128 __quadmath_gammaq_r (__float128, int *);
+extern __float128 __quadmath_lgamma_negq (__float128, int *);
+extern __float128 __quadmath_lgamma_productq (__float128, __float128,
+ __float128, int);
+extern __float128 __quadmath_lgammaq_r (__float128, int *);
+extern __float128 __quadmath_x2y2m1q (__float128 x, __float128 y);
+extern __complex128 __quadmath_kernel_casinhq (__complex128, int);
+
+static inline void
+mul_splitq (__float128 *hi, __float128 *lo, __float128 x, __float128 y)
+{
+ /* Fast built-in fused multiply-add. */
+ *hi = x * y;
+ *lo = fmaq (x, y, -*hi);
+}
+
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
unsigned negative:1;
unsigned exponent:15;
- uint64_t mant_high:48;
- uint64_t mant_low:64;
+ unsigned mantissa0:16;
+ unsigned mantissa1:32;
+ unsigned mantissa2:32;
+ unsigned mantissa3:32;
#else
- uint64_t mant_low:64;
- uint64_t mant_high:48;
+ unsigned mantissa3:32;
+ unsigned mantissa2:32;
+ unsigned mantissa1:32;
+ unsigned mantissa0:16;
unsigned exponent:15;
unsigned negative:1;
#endif
unsigned negative:1;
unsigned exponent:15;
unsigned quiet_nan:1;
- uint64_t mant_high:47;
- uint64_t mant_low:64;
+ unsigned mantissa0:15;
+ unsigned mantissa1:32;
+ unsigned mantissa2:32;
+ unsigned mantissa3:32;
#else
- uint64_t mant_low:64;
- uint64_t mant_high:47;
+ unsigned mantissa3:32;
+ unsigned mantissa2:32;
+ unsigned mantissa1:32;
+ unsigned mantissa0:15;
unsigned quiet_nan:1;
unsigned exponent:15;
unsigned negative:1;
#endif
- } nan;
+ } ieee_nan;
} ieee854_float128;
__builtin_fpclassify (QUADFP_NAN, QUADFP_INFINITE, QUADFP_NORMAL, \
QUADFP_SUBNORMAL, QUADFP_ZERO, x)
+#ifndef math_opt_barrier
+# define math_opt_barrier(x) \
+({ __typeof (x) __x = (x); __asm ("" : "+m" (__x)); __x; })
+# define math_force_eval(x) \
+({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "m" (__x)); })
+#endif
+
+/* math_narrow_eval reduces its floating-point argument to the range
+ and precision of its semantic type. (The original evaluation may
+ still occur with excess range and precision, so the result may be
+ affected by double rounding.) */
+#define math_narrow_eval(x) (x)
+
+/* If X (which is not a NaN) is subnormal, force an underflow
+ exception. */
+#define math_check_force_underflow(x) \
+ do \
+ { \
+ __float128 force_underflow_tmp = (x); \
+ if (fabsq (force_underflow_tmp) < FLT128_MIN) \
+ { \
+ __float128 force_underflow_tmp2 \
+ = force_underflow_tmp * force_underflow_tmp; \
+ math_force_eval (force_underflow_tmp2); \
+ } \
+ } \
+ while (0)
+/* Likewise, but X is also known to be nonnegative. */
+#define math_check_force_underflow_nonneg(x) \
+ do \
+ { \
+ __float128 force_underflow_tmp = (x); \
+ if (force_underflow_tmp < FLT128_MIN) \
+ { \
+ __float128 force_underflow_tmp2 \
+ = force_underflow_tmp * force_underflow_tmp; \
+ math_force_eval (force_underflow_tmp2); \
+ } \
+ } \
+ while (0)
+
+/* Likewise, for both real and imaginary parts of a complex
+ result. */
+#define math_check_force_underflow_complex(x) \
+ do \
+ { \
+ __typeof (x) force_underflow_complex_tmp = (x); \
+ math_check_force_underflow (__real__ force_underflow_complex_tmp); \
+ math_check_force_underflow (__imag__ force_underflow_complex_tmp); \
+ } \
+ while (0)
+
+#ifndef HAVE_FENV_H
+# define feraiseexcept(arg) ((void) 0)
+typedef int fenv_t;
+# define feholdexcept(arg) ((void) 0)
+# define fesetround(arg) ((void) 0)
+# define feupdateenv(arg) ((void) (arg))
+# define fesetenv(arg) ((void) (arg))
+# define fetestexcept(arg) 0
+# define feclearexcept(arg) ((void) 0)
+#else
+# ifndef HAVE_FEHOLDEXCEPT
+# define feholdexcept(arg) ((void) 0)
+# endif
+# ifndef HAVE_FESETROUND
+# define fesetround(arg) ((void) 0)
+# endif
+# ifndef HAVE_FEUPDATEENV
+# define feupdateenv(arg) ((void) (arg))
+# endif
+# ifndef HAVE_FESETENV
+# define fesetenv(arg) ((void) (arg))
+# endif
+# ifndef HAVE_FETESTEXCEPT
+# define fetestexcept(arg) 0
+# endif
+#endif
+
+#ifndef __glibc_likely
+# define __glibc_likely(cond) __builtin_expect ((cond), 1)
+#endif
+
+#ifndef __glibc_unlikely
+# define __glibc_unlikely(cond) __builtin_expect ((cond), 0)
+#endif
+
+#if defined HAVE_FENV_H && defined HAVE_FESETROUND && defined HAVE_FEUPDATEENV
+struct rm_ctx
+{
+ fenv_t env;
+ bool updated_status;
+};
+
+# define SET_RESTORE_ROUNDF128(RM) \
+ struct rm_ctx ctx __attribute__((cleanup (libc_feresetround_ctx))); \
+ libc_feholdsetround_ctx (&ctx, (RM))
+
+static inline __attribute__ ((always_inline)) void
+libc_feholdsetround_ctx (struct rm_ctx *ctx, int round)
+{
+ ctx->updated_status = false;
+
+ /* Update rounding mode only if different. */
+ if (__glibc_unlikely (round != fegetround ()))
+ {
+ ctx->updated_status = true;
+ fegetenv (&ctx->env);
+ fesetround (round);
+ }
+}
+
+static inline __attribute__ ((always_inline)) void
+libc_feresetround_ctx (struct rm_ctx *ctx)
+{
+ /* Restore the rounding mode if updated. */
+ if (__glibc_unlikely (ctx->updated_status))
+ feupdateenv (&ctx->env);
+}
+#else
+# define SET_RESTORE_ROUNDF128(RM) ((void) 0)
+#endif
+
#endif
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