//
// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// builtins.c --
//
// Author           : Peter A. Buhr
// Created On       : Fri Jul 21 16:21:03 2017
// Last Modified By : Peter A. Buhr
// Last Modified On : Sun Dec  8 09:01:23 2024
// Update Count     : 149
//

#define __cforall_builtins__

// Type that wraps a pointer and a destructor-like function - used in generating implicit destructor calls for struct
// members in user-defined functions. Note: needs to occur early, because it is used to generate destructor calls during
// code generation
forall( T & )
struct __Destructor {
	T * object;
	void (*dtor)( T * );
};

// Defined destructor in the case that non-generated code wants to use __Destructor.
forall( T & )
static inline void ^?{}( __Destructor(T) & x ) {
	if ( x.object && x.dtor ) {
		x.dtor( x.object );
	}
}

// Easy interface into __Destructor's destructor for easy codegen purposes.
extern "C" {
	forall( T & )
	static inline void __destroy_Destructor( __Destructor(T) * dtor ) {
		^(*dtor){};
	}
}

// exception implementation

typedef unsigned long long __cfaabi_abi_exception_type_t;

#include "../src/virtual.h"
#include "../src/exception.h"

void exit( int status, const char fmt[], ... ) __attribute__ (( format( printf, 2, 3 ), __nothrow__, __leaf__, __noreturn__ ));
void abort( const char fmt[], ... ) __attribute__ (( format( printf, 1, 2 ), __nothrow__, __leaf__, __noreturn__ ));

forall( T & )
static inline T & identity( T & i ) {
	return i;
}

// generator support
struct generator$ {
	inline int;
};

static inline void  ?{}( generator$ & this ) { ((int&)this) = 0; }
static inline void ^?{}( generator$ & ) {}

forall( T & )
trait is_generator {
      void main( T & this );
      generator$ * get_generator( T & this );
};

forall( T & | is_generator( T ) )
static inline T & resume( T & gen ) {
	main( gen );
	return gen;
}

// Nearly "otype," except no parameterless constructor.
// All you need, to store values in variables and to pass and return by value.
// Many cases of
//     forall( T ...
// can be "simplified" to
//     forall( T& | is_value(T) ...
forall( T* )
trait is_value {
	void ?{}( T&, T );
	T ?=?( T&, T );
	void ^?{}( T& );
};

// implicit increment, decrement if += defined, and implicit not if != defined

// C11 reference manual Section 6.5.16 (page 101): "An assignment expression has the value of the left operand after the
// assignment, but is not an lvalue." Hence, return a value not a reference.
static inline {
	forall( T& | is_value(T) | { T ?+=?( T &, one_t ); } )
	T ++?( T & x ) { return x += 1; }

	forall( T& | is_value(T) | { T ?+=?( T &, one_t ); } )
	T ?++( T & x ) { T tmp = x; x += 1; return tmp; }

	forall( T& | is_value(T) | { T ?-=?( T &, one_t ); } )
	T --?( T & x ) { return x -= 1; }

	forall( T& | is_value(T) | { T ?-=?( T &, one_t ); } )
	T ?--( T & x ) { T tmp = x; x -= 1; return tmp; }

	forall( T& | is_value(T) | { int ?!=?( T, zero_t ); } )
	int !?( T & x ) { return !( x != 0 ); }
} // distribution

// universal typed pointer constant
static inline forall( DT & ) DT * intptr( uintptr_t addr ) { return (DT *)addr; }
static inline forall( ftype FT ) FT * intptr( uintptr_t addr ) { return (FT *)addr; }

#if defined(__SIZEOF_INT128__)
// constructor for 128-bit numbers (all constants are unsigned as +/- are operators)
static inline void ?{}( unsigned int128 & this, unsigned long int h, unsigned long int l ) {
	this = (unsigned int128)h << 64 | (unsigned int128)l;
} // ?{}
#endif // __SIZEOF_INT128__


// exponentiation operator implementation

extern "C" {
	float powf( float x, float y );
	double pow( double x, double y );
	long double powl( long double x, long double y );
	float _Complex cpowf( float _Complex x, _Complex float z );
	double _Complex cpow( double _Complex x, _Complex double z );
	long double _Complex cpowl( long double _Complex x, _Complex long double z );
} // extern "C"

static inline {											// wrappers
	float ?\?( float x, float y ) { return powf( x, y ); }
	double ?\?( double x, double y ) { return pow( x, y ); }
	long double ?\?( long double x, long double y ) { return powl( x, y ); }
	float _Complex ?\?( float _Complex x, _Complex float y ) { return cpowf( x, y ); }
	double _Complex ?\?( double _Complex x, _Complex double y ) { return cpow( x, y ); }
	long double _Complex ?\?( long double _Complex x, _Complex long double y ) { return cpowl( x, y ); }
} // distribution

int ?\?( int x, unsigned int y );
long int ?\?( long int x, unsigned long int y );
long long int ?\?( long long int x, unsigned long long int y );
// unsigned computation may be faster and larger
unsigned int ?\?( unsigned int x, unsigned int y );
unsigned long int ?\?( unsigned long int x, unsigned long int y );
unsigned long long int ?\?( unsigned long long int x, unsigned long long int y );

forall( OT | { void ?{}( OT & this, one_t ); OT ?*?( OT, OT ); } ) {
	OT ?\?( OT x, unsigned int y );
	OT ?\?( OT x, unsigned long int y );
	OT ?\?( OT x, unsigned long long int y );
} // distribution

static inline {
	int ?\=?( int & x, unsigned int y ) { x = x \ y; return x; }
	long int ?\=?( long int & x, unsigned long int y ) { x = x \ y; return x; }
	long long int ?\=?( long long int & x, unsigned long long int y ) { x = x \ y; return x; }
	unsigned int ?\=?( unsigned int & x, unsigned int y ) { x = x \ y; return x; }
	unsigned long int ?\=?( unsigned long int & x, unsigned long int y ) { x = x \ y; return x; }
	unsigned long long int ?\=?( unsigned long long int & x, unsigned long long int y ) { x = x \ y; return x; }
} // distribution


// enumeration implementation

forall( E ) trait Bounded {
	E lowerBound( void );
	E upperBound( void );
};

forall( E | Bounded( E ) ) trait Serial {
	int fromInstance( E e );
	E fromInt_unsafe( int i );
	E succ_unsafe( E e );
	E pred_unsafe( E e );
};

forall( E ) trait CfaEnum {
	const char * label( E e );
	int posn( E e );
};

forall( E, V | CfaEnum( E ) ) trait TypedEnum {
	V value( E e );
};

static inline
forall( E | Serial( E ) ) {
	E fromInt( int i ) {
		E upper = upperBound();
		E lower = lowerBound();
		// It is okay to overflow as overflow will be theoretically caught by the other bound
		if ( i < fromInstance( lower ) || i > fromInstance( upper ) )
			abort( "call to fromInt has index %d outside of enumeration range %d-%d.",
				   i, fromInstance( lower ), fromInstance( upper ) );
		return fromInt_unsafe( i );
	}

	E succ( E e ) {
		E upper = upperBound();
		if ( fromInstance( e ) >= fromInstance( upper ) )
			abort( "call to succ() exceeds enumeration upper bound of %d.", fromInstance( upper ) );
		return succ_unsafe( e );
	}

	E pred( E e ) {
		E lower = lowerBound();
		if ( fromInstance( e ) <= fromInstance( lower ) )
			abort( "call to pred() exceeds enumeration lower bound of %d.", fromInstance( lower ) );
		return pred_unsafe( e );
	}

	int Countof( E ) {
		E upper = upperBound();
		E lower = lowerBound();
		return fromInstance( upper ) + fromInstance( lower ) + 1;
	}
}

static inline
forall( E | CfaEnum( E ) ) {
	int ?==?( E l, E r ) { return posn( l ) == posn( r ); }
	int ?!=?( E l, E r ) { return posn( l ) != posn( r ); }
	int ?<?( E l, E r ) { return posn( l ) < posn( r ); }
	int ?<=?( E l, E r ) { return posn( l ) <= posn( r ); }
	int ?>?( E l, E r ) { return posn( l ) > posn( r ); }
	int ?>=?( E l, E r ) { return posn( l ) >= posn( r ); }
}

static inline
forall( E | Serial( E ) ) {
	E ++?( E & l ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos + 1 );
		return l;
	}

	E --?( E & l ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos - 1 );
		return l;
	}

	E ?+=?( E & l, one_t ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos + 1 );
		return l;
	}

	E ?-=?( E & l, one_t ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos - 1 );
		return l;
	}

	E ?+=?( E & l, int i ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos + i );
		return l;
	}

	E ?-=?( E & l, int i ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos - i );
		return l;
	}

	E ?++( E & l ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos + 1 );
		return fromInt_unsafe( pos );
	}

	E ?--( E & l ) {
		int pos = fromInstance( l );
		l = fromInt_unsafe( pos - 1 );
		return fromInt_unsafe( pos );
	}
}

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