#include <fenv.h>
#include <fpu_control.h>

#if __riscv_xlen == 32

#define _FP_W_TYPE_SIZE		32
#define _FP_W_TYPE		unsigned long
#define _FP_WS_TYPE		signed long
#define _FP_I_TYPE		long

#define _FP_MUL_MEAT_S(R,X,Y)				\
  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_D(R,X,Y)				\
  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y)				\
  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)

#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)

#define _FP_NANFRAC_S		_FP_QNANBIT_S
#define _FP_NANFRAC_D		_FP_QNANBIT_D, 0
#define _FP_NANFRAC_Q		_FP_QNANBIT_Q, 0, 0, 0

#else

#define _FP_W_TYPE_SIZE		64
#define _FP_W_TYPE		unsigned long long
#define _FP_WS_TYPE		signed long long
#define _FP_I_TYPE		long long

#define _FP_MUL_MEAT_S(R,X,Y)					\
  _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
#define _FP_MUL_MEAT_D(R,X,Y)					\
  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y)					\
  _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)

#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_2_udiv(Q,R,X,Y)

#define _FP_NANFRAC_S		_FP_QNANBIT_S
#define _FP_NANFRAC_D		_FP_QNANBIT_D
#define _FP_NANFRAC_Q		_FP_QNANBIT_Q, 0

#endif

#define _FP_NANSIGN_S		0
#define _FP_NANSIGN_D		0
#define _FP_NANSIGN_Q		0

#define _FP_KEEPNANFRACP 0
#define _FP_QNANNEGATEDP 0

#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)	\
  do {						\
    R##_s = _FP_NANSIGN_##fs;			\
    _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs);	\
    R##_c = FP_CLS_NAN;				\
  } while (0)

#define _FP_DECL_EX		int _frm __attribute__ ((unused));
#define FP_ROUNDMODE		_frm

#define FP_RND_NEAREST		FE_TONEAREST
#define FP_RND_ZERO		FE_TOWARDZERO
#define FP_RND_PINF		FE_UPWARD
#define FP_RND_MINF		FE_DOWNWARD

#define FP_EX_INVALID		FE_INVALID
#define FP_EX_OVERFLOW		FE_OVERFLOW
#define FP_EX_UNDERFLOW		FE_UNDERFLOW
#define FP_EX_DIVZERO		FE_DIVBYZERO
#define FP_EX_INEXACT		FE_INEXACT

#define _FP_TININESS_AFTER_ROUNDING 1

#ifdef __riscv_flen
#define FP_INIT_ROUNDMODE			\
do {						\
  __asm__ volatile ("frrm %0" : "=r" (_frm));	\
} while (0)

#define FP_HANDLE_EXCEPTIONS					\
do {								\
  if (__builtin_expect (_fex, 0))				\
    __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex));	\
} while (0)
#else
#define FP_INIT_ROUNDMODE	_frm = FP_RND_NEAREST
#endif
